Re: [time-nuts] GPSDO standard interface?
Hidden on the backplane of the Nortel (trimble) units is a SCPI interface known as the Serial Interface to CDMA system It is RS485 standard but I usually tap into the TTL I/O of the transceiver chip. This is the standard SCPI interface. E D C B A 1 +24/-48Vdc +24/-48Vdc +24/-48Vdc +24/-48Vdc +24/-48Vdc 4 +24/-48VRTN +24/-48VRTN +24/-48VRTN +24/-48VRTN +24/-48VRTN 5 Frame ground Frame ground Frame ground Frame ground Frame ground 15 GPSTM Tx Data_- GPSTM Tx Data_+ Digital ground GPSTM Rx Data_- GPSTM Rx Data_+ 19 CM_1 Even_Sec_+ CM_1 Even_Sec_- Digital ground CM_2 Even_Sec_+ CM_2 Even_Sec_- Zpack commonly used connections [cid:image009.png@01CF92F8.B74C7660] [cid:image010.png@01CF92F8.B74C7660] Typical RS484 interface Commands Command/Response Format Value/Range 1 Time code query C: Get Time Code Info. Query R: Time Code Information String Character 13 Character n ptime:tcode? x* 2 Preset receiver command C: Reset GPS Command R: none Character 12 syst:preset 3 Receiver identification query C: Identification Query R: Manufacturer and revision information Character 6 Character n *idn? x*,x*,x*,x*[,x*,x*,x*] 4 Set Receiver Position C: Specify Position Command R: none Character n gps:position a,n*,n*,n*.n*,a,n*,n*,nn.n*,n* .n* 5 Get Receiver Position C: Position Query R: Location Character 14 Character n gps:position? A,n*,n*,n.n*E[+- ]n*,A,n*,n*,n.n*E[+- ]n*,n.n*E[+-]n* 6 Set antenna delay C: Antenna delay in seconds R: none Character 27 gps:ref:adelay .n 7 Get antenna delay C: Query antenna delay R: Antenna Delay in seconds Character 16 Character n gps:ref:adelay? n.n*E[+-]n* 8 GPS survey command C: Survey mode command R: none Character 25 or Character 20 gps:pos:survey[:stat] once 9 Set manual holdover mode C: Holdover Initiate Command R: none Character 15 rosc:hold:init 10 Set manual holdover recov- ery C: Recover from manual hold- over R: none Character 19 rosc:hold:rec:init 11 Holdover duration query C: Holdover Duration Query R: Holdover Duration in Sec- onds Character 15 Character n rosc:hold:dur? n.n*E[+-]n*,0 | 1 12 List of Satellites being tracked C: Tracked Satellites Query R: List of satellites ID's Character 18 Character n gps:sat:tracking? n*,n*,n*,n*,n*,n*,n*,n* 13 List of predicted Satellites In View C: Satellites in View Query R: List of predicted Satellites in view Character 18 Character n gps:sat:vis:pred? n*,n*,n*,n*,n*,n*,n*,n* 14 Immediate Synchronization Command C: Synchronize GPS system R: none Character 15 sync:immediate 15 System Language Query C: System mode query R: System Mode String Character 11 Character 7 syst:lang? PRIMARY | INSTALL 16 Frequency Figure of Merit query C: Freq. Figure of Merit Query R: Frequency figure of merit Character 11 Character n sync:ffom? n* 17 Survey progress query C: Survey Progress Query R: Percent of Survey com- pleted. Character 25 Integer gps:pos:survey:progress? 0 to 100 decimal 18 Clear error queue command C: Clear Error Command R: none Character 5 none *cls 19 Log data query C: Read Log Entry Query R: Log Entry Data Character 15 Character n diag:log:read? [n] x* 20 Clear log entries command C: Clear log entries command R: none Character 15 diag:log:clear 21 Log entries query C: Query log entries R: Number of entries in log. Character 16 Character n diag:log:count? n* 22 Operation status register query C: Query operation status reg- ister R: Status register Character 28 Character n status:operation:condition? n* 23 Life time Counter query C: Get Lifetime Count Query R: Total Powered-On Time Character 21 Character n diag:lifetime:count? n* 24 Return Last Response query C: Request last response Com- mand R: Last Response string Character 16 Character n diag:query:resp? x* 25 Port initialization C: Initialize port R: none Character 1 \r\n 26 Set GPS Satellite Elevation Mask Angle C: Elevation Mask Angle Query R: none Character 21 gps:sat:trac:emangle n* 27 Get GPS Satellite Elevation Mask Angle C: Get Elev. Mask Angle Query R: Elevation mask angle in degrees Character 22 Byte gps:sat:trac:emangle? 0 to 89 decimal 28 Get list of Specific Satellites not Tracked. C: Get Ignored Satellites Query R: List of satellites ID's Character 21 Character n gps:sat:trac:ignore? n* 29 Set Ignored (disable track- ing) of Specific Satellites C: Set Ignored Satellites Com- mand R: none Character (21 + size of sat. list) gps:sat:trac:ignore n*,n*, ... 30 Get Included Satellites C: Get Included Satellites Query R: List of satellites ID's Character 22 Character n gps:sat:trac:include? n*, n*,... 31 Set Included for Specific Satellites C: Set Included Satellites Command R: none Character 21 (+sat. list) gps:sat:trac:include n*,n*,... 32 Set Enable LED C: Enable LED Command R: none Character 14 led:enabled 1 33
Re: [time-nuts] Sad news Ulrich Bangert
Thanks Volker. Vale, Hans. Mark VK2HMC -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Volker Esper Sent: Monday, 23 June 2014 12:28 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Sad news Ulrich Bangert I am shocked to hear that. Urich was a very helpful friend, I've learned a lot from him. I'm so sorry to hear that. Please allow me to say some words in Ulrichs (and my) native language. Die Nachricht vom Tode Urich's hat mich sehr getroffen. Ich habe ihn als einen hilfsbereiten und offenen Menschen kennen gelernt, aber leider nie persönlich kennen lernen können. Bitte, lieber Hartmut, falls Du Kontakt hast, richte der Familie mein herzliches Beileid aus. Thank you very much. Volker - DF9PL Am 20.06.2014 22:52, schrieb Hartmut Paesler: Dear group, unfortunately I have to deliver the sad news that Ulrich Bangert, DF6JB passed away on 11/06, aged 59. Best regards, Hartmut DL1YDD ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 58503A service manual with schematics
John, Most time nuts have searched for this particular manual at one stage. I am afraid it is unobtainium. marks -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gianni Sent: Thursday, 29 May 2014 7:09 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 58503A service manual with schematics hi John I am new in the list but not in the art here a lot of manuals http://exodus.poly.edu/~kurt/manuals/manuals/HP%20Agilent/ Gianni In 28 maggio 2014, starb...@uplink.net scritto: Hello to the time experts, I own a nice HP-58503A and I would be happy to find a pdf version of the complete service manual for it. Is somebody in the position to help me or to give me a hint where I could find it? Thank you very much, regards, John ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Motorola M12+
That's not the original gps rx.. (281161070304) Careful what you get off yixun.. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pascual Arbona Lopez Sent: Friday, 22 November 2013 7:33 PM To: Discussion of precise time and frequency measurement Subject: [time-nuts] Motorola M12+ I am wondering if this is a sustitute of the original oncore VP receiver for the Z3801 -Z3805. (E-pay 281161070304 ) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] linux-gpib working on a RasPI
Hi Bob, what is so wrong with the Anodised version? --mark -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Tuesday, 12 November 2013 8:25 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] linux-gpib working on a RasPI Good job! I've read other good experiences about the Beiming. I finally wound up buying a Prologix Ethernet adapter. Let this be a warning to anyone who is tempted to buy the 82357B clone with the gold-anodized aluminum case. Do Not Do It! Bob From: cfo xne...@luna.dyndns.dk To: time-nuts@febo.com Sent: Monday, November 11, 2013 2:44 PM Subject: [time-nuts] linux-gpib working on a RasPI I have finally succeded in making linux-gpib build and load the agilent_82357a_gpib module. Now i have a 3..5 Watt- Networked GPIB-Adapter , where even python bindings work. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] powering Trimble Thunderbolt with -5V rather than -12V
A popular solution down under is to use a 555 timer driving a charge pump to generate negative rails from a single positive supply. Example here: http://www.vk2hmc.net/blog/?p=970 Hi all - I'm back :) --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Stewart Cobb Sent: Thursday, 31 October 2013 5:12 PM To: time-nuts@febo.com Subject: [time-nuts] powering Trimble Thunderbolt with -5V rather than -12V Executive summary: you can power a surplus gold Thunderbolt using a -5V supply in place of a -12V supply, and it will probably work just fine. Details: The manual for Trimble Thunderbolts specifies power supplies of +5V, +12V, and -12V. It turns out that power supplies that provide +5V, +12V, and -5V are easier to obtain locally. I began to wonder what circuitry in the Thunderbolt required -12V, and whether it would run just as well on -5V. So I took one apart and started probing. As far as I can tell, the -12V supply goes to only two places. One is the negative supply pin for the quad op-amp (LT1014) in the DAC circuit for the OCXO. The other is a strange little circuit involving a 2N3904 (SOT-23 marked 1A) near the 232 driver chip, right next to the serial port. This circuit seems to be comparing the -12V input with one of the charge-pump pins on the 232 chip. Its output (?) connects to a test point labeled MON. I assumed this was non-critical and decided to ignore it. The LT1014 op-amp is rated for operation on supply voltage as little as 5V and as much as 30V (+/- 15V). The spec sheet says the output saturates about (1V typical / 3.5V max over temperature) above the negative supply. Presumably, if the op-amp is not asked to generate output voltages lower than -1.5V, it should run fine with a -5V negative supply. The only negative voltages I could find, probing around the op-amp circuit, were generated by AC-coupling digital square waves. None of the op-amp outputs were negative. (My DAC steady-state value was around +300mV, which appeared many places in the circuit. Presumably a slightly negative DAC value would also appear in many places, but as long as it's greater than -1500mV, it won't matter.) Armed with theoretical and practical confirmation that this should work, I tried it. And, oddly enough, it appears to be working. Two different Thunderbolts have been powered by +5/+12/-5 supplies, and both have settled down and started tracking exactly as one would expect. For one, the settled DAC voltage was within a few millivolts of the value it had on the specified power supplies, shortly before the change. The other had not been powered on for a while and is still settling, but it seems happy. There is a subtle possibility for concern, in that the sensitive DAC signals near ground are now about 3.5V away from the center of the op-amp supply range. This could theoretically cause increased distortion, offset, or offset drift due to the larger common-mode voltage on the op-amp inputs. In practice, it does not appear to be an issue. This note applies to the common surplus Thunderbolts in the gold-anodized box, with the Trimble-branded OCXO. All of those I've tried seem to settle with DAC voltages near zero. If you try this with another style of Thunderbolt, you're on your own. Cheers! --Stu ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Trimble TB replacement options???
As per Bob Camps Wisdom below, most of the thunderbolts and Z38XX have been well picked over, the remaining ones are usually poor in some way. The main problem seems to be unstable oscillators, invasive repair is required to meet specifications. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Saturday, 12 October 2013 10:52 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Trimble TB replacement options??? Hi All of these gizmos come on the market cheap when they are being scrapped out. Once that process is over for a generation of parts, the pieces climb. There are only a few working strategies: 1) Buy several when they first come out. 2) Pay the going rate many years later. 3) Switch to other gizmos with other cost / feature tradeoffs. In this case the likely tradeoff is to one of the Nortel / Trimble units or to one of the later HP boxes. The Nortel / Trimbles are in the sub $150 price range delivered. The later HP's are a bit more expensive. The Nortel / Trimble's come mainly from RDR Electronics on the e-place. The HP's come from the other side of the Pacific Ocean. One other option - before I'd pay $300 for a possibly broken TBolt (I've got a few of those), I'd do an email to find out what a brand new GPSDO (with warranty) from Jackson Labs would cost me. Bob On Oct 11, 2013, at 8:51 PM, Paul tic-...@bodosom.net wrote: On Fri, Oct 11, 2013 at 7:24 PM, Frank Hughes hp_cisco...@yahoo.com wrote: Does it seem like the Trimble Thunderbolt units are becoming scarce, and commanding prices accordingly? The inexpensive used Thunderbolts predate my interest in GPSDOs so I can't speak to relative prices but if your budget is ~ $300 they're still readily available. The various 2PPS Trimble GPSTM boxes/boards seem to occupy the $200 Thunderbot-like niche and some work (somewhat) with Lady Heather if you're fond of that program. Various Z38xx devices are also candidates if you just want an inexpensive GPSDO in-a-box with 1 and 10M Hz (some with multiple outputs) if you are willing to deal with it's-not-quite-a-Z3801 behavior. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Trimble replacement part-2
Hmm, shall we vote to organise timenuts group buy? --amrki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bill Dailey Sent: Sunday, 13 October 2013 10:13 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Trimble replacement part-2 I have a double oven and oem. Prices are reasonable. Inquire. Sent from mobile On Oct 12, 2013, at 5:37 PM, Paul tic-...@bodosom.net wrote: On Sat, Oct 12, 2013 at 5:49 PM, Frank Hughes hp_cisco...@yahoo.com wrote: I sent an EM to Jackson Labs sales to see if they will sell a Fury to an individual Of course they will. ..can't imagine what Quan-1 $$$ is going to be... $1,000 Retail box $2,000. The double oven is naturally more expensive. Presumably the OEM board is less but probably not the great deal from back in the day. -- Paul ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A readl atomic wristwatch
That's the first time I have seen a practical explanation and working example of a CASC in operation. Can I say Awesome? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Joseph Gray Sent: Wednesday, 2 October 2013 3:23 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] A readl atomic wristwatch http://www.ablogtowatch.com/bathys-hawaii-cesium-133-atomic-wrist-watch-accurate-second-1000-years/ But will TVB buy one? :-) Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A readl atomic wristwatch
Hey Hal, Symetricom need sales and investment in this product, to get back the RD costs. I believe this is the first Gen? If they get the volume the price has to drop. However, It is a bit sucky marketing can get away with that. I wonder if they have good and bad CSAC a la Crystal oscillators or I haven't grasped the importance of this yet :) --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Wednesday, 2 October 2013 9:54 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] A readl atomic wristwatch ma...@non-stop.com.au said: That's the first time I have seen a practical explanation and working example of a CASC in operation. Practical? What's the battery life? How accurately can you read a watch dial? How good are modern watches? How do crystals compare with mechanical? Where is the crossover point between watch accuracy and human read-it accuracy? Is that before or after the CASC watch runs out of battery? I suppose you could put it on the charger every night, next to your cell phone, but then I could make a crystal watch that connects to a charger stand that also sets the time. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] a real atomic wristwatch
That it Ronald, the watchmakers art hasn't been lost, it is being bought up to date. Although the work that went into the circa 1880 Chronometers is nothing short of amazing given the tools and technology of the time. So we see history repeat! Cheers :) -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Ronald Held Sent: Wednesday, 2 October 2013 8:30 AM To: time-nuts@febo.com Subject: [time-nuts] a real atomic wristwatch Do not forget about the atomic pocket watch: http://www.watchpro.com/15431-hoptroff-to-unveil-atomic-pocket-watch-at-salon-qp/ Ronald ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A readl atomic wristwatch
I really should stop doing things like this: http://www.leapsecond.com/pages/atomic-bill/ sorry Tom ;) -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Joseph Gray Sent: Wednesday, 2 October 2013 3:23 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] A readl atomic wristwatch http://www.ablogtowatch.com/bathys-hawaii-cesium-133-atomic-wrist-watch-accurate-second-1000-years/ But will TVB buy one? :-) Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] FE-5680A Loop Lock Indicator
There is a problem introduced if you sink too much current off the lock pin. An LED draws enough current to cause the issue, I think to do with not going into lock or PPS output. If I could just remember what the issue is... Anyway, this guy has it nailed: http://www.ka7oei.com/10_MHz_Rubidium_FE-5680A.html Except, the ones that I have that need a +5V supply are programmable. Go figure.. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Sunday, 22 September 2013 1:25 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] FE-5680A Loop Lock Indicator If the lock output comes from the micro or a logic port with a maximum output of 3.3 or 5V, a LED connected to it from +15 will be always ON. On Sat, Sep 21, 2013 at 4:55 PM, Bob Stewart b...@evoria.net wrote: The instructions I got with this Rb said that you could hook an LED through a 5-10K resistor to the +15 supply and get a lock indication. I'm using a 10K resistor and the LED lights as soon as it's powered up from cold. Is the loop lock indicator circuit broken or is it just another strange option for these things? I saw on one site that if you do it this way it prevents lock, but mine seems to lock OK with or without the voltage. Bob - AE6RV ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Space mission comes to an end becuase of a computer time tagging problem
Winders? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David J Taylor Sent: Saturday, 21 September 2013 2:51 AM To: Time-nuts mailing list Subject: [time-nuts] Space mission comes to an end becuase of a computer time tagging problem NASA's Deep Space Comet Hunter Mission Comes to an end The news release includes this paragraph: After losing contact with the spacecraft last month, mission controllers spent several weeks trying to uplink commands to reactivate its onboard systems. Although the exact cause of the loss is not known, analysis has uncovered a potential problem with computer time tagging that could have led to loss of control for Deep Impact's orientation. That would then affect the positioning of its radio antennas, making communication difficult, as well as its solar arrays, which would in turn prevent the spacecraft from getting power and allow cold temperatures to ruin onboard equipment, essentially freezing its battery and propulsion systems. Knowing the membership of this group, does anyone have more insight into what the computer time tagging problem might be? Thanks, David -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] picosecond baking
Mmmm femtoseconds ... And if you manage to eat just a half you can travel in time! -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bill Hawkins Sent: Friday, 20 September 2013 7:32 AM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] picosecond baking So, Magnus, what does a baked picosecond taste like? How many to make a mouthful? Just an attempt to raise the humor level on this list :) Bill Hawkins -Original Message- From: Magnus Danielson Sent: Thursday, September 19, 2013 3:14 PM Fellow time-nuts, Every once in a while, you find that a felliow time-nut is in town. That's when food and beer is supplemented with optimal baking methods and picosecond precision timing and well, fun. I do hope Joe and his wife found their way back in the dark yesterday :) Just wanted to share some of the social aspects of this list :) Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] nortel trible NTBW50AA boards SCPI command access
I have a couple of these boards and I have modified one to access the SCPI command port available on the 'Z-Pack' rear connector. The addition is simple but effective giving the TSIP front panel serial port plus the cellular serial port. Note that you will now have 2 separate connectors for the different control modes. One obvious use for the SCPI port could be for NTPD. The NTBW50AA is lacking 1PPS but has a very accurate 2 Hz pulse ideal for NTPD. Unfortunately the :syst:stat? command is lacking in the firmware. If anyone in interested in the details I'll prepare a doc and share? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] nortel trible NTBW50AA boards SCPI command access
Typo - 0.5Hz, coming out of a 74AC74 driven by PAL. Split off to front connector and cellular interface so there is 2 places to pick of 0.5Hz. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Iain Young Sent: Saturday, 14 September 2013 5:12 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] nortel trible NTBW50AA boards SCPI command access Hi Mark On 13/09/13 13:26, Mark C. Stephens wrote: One obvious use for the SCPI port could be for NTPD. The NTBW50AA is lacking 1PPS but has a very accurate 2 Hz pulse ideal for NTPD. 2Hz ? I thought it they were a pulse on the even second, thus actually 0.5 Hz ? I wonder how the PPS Driver in NTP would react to that (either 2Hz, or 0.5Hz pulses). I guess if it really is 2Hz, then one of Tom's PICs could be used to drop it to 1 Hz But if it's 0.5 Hz, I wonder if a modification to the ATOM driver or underlying PPS code would be needed Or is the 2Hz signal coming off the SCPI port ? Iain (and yes, like others, I am interested) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A day gone awry...
I have discovered a possible offshoot of The Conservation of Bustedness It's the more you clean up the less can you find ): -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Don Latham Sent: Friday, 13 September 2013 8:21 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] A day gone awry... Actually, another expression of McManus' sequential vortex, best expressed by the folksong the bucket's got a hole in it. All these are corollaries to Murphy's Law of Universal Bustedness. Don Magnus Danielson On 09/09/2013 11:31 PM, Ed Palmer wrote: It looks like The Conservation of Bustedness came from Usenet. http://rec.crafts.metalworking.narkive.com/66UwVxf4/conservation-of-b ustedness But doesn't entropy mean that the amount of Bustedness in the universe keeps increasing? Hell, I might as well quit. I can't win! Well, the trick is having it get the hell out of YOUR house. With enough persistence you can lower the bustiness in your lab as it moves to other random places. Things will go wrong in your lab every once in a while. Turns out that bustiness cloggs together, so you will have to push it away for a long time until it cloggs elsewhere and you push it away at higher rate than you receive it new. Also remember that Kilroy was here. Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- The power of accurate observation is commonly called cynicism by those who have not got it. -George Bernard Shaw Dr. Don Latham AJ7LL Six Mile Systems LLC 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Wavecrest DTS 2070
Nod, this is the problem I have, It says 110/220 but is it automatic or do I need to change the strapping? I had a look at Ed Palmers excellent tear down and there were switch mode PSU in it. But he has a 2077, mines a 2070 so it could be completely different, or not.. Arrgh.. I am so wanting to plug it in, unlike Ed I have a place ready for it! I guess Oracle Palmer will be online later and will be able to provide an answer :) -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Monday, 9 September 2013 2:22 PM To: Bob Stewart; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 Oops. Maybe I should have just kept my peace. I found a User's Guide here: http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it can take either 110 or 220. Pry open the fuse compartment and see what's in there. Someone else will now probably post the right way to go about it, though. =) Bob - AE6RV From: Bob Stewart b...@evoria.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, September 8, 2013 11:13 PM Subject: Re: [time-nuts] Wavecrest DTS 2070 Go to a tourist supply store and buy a 110 to 230/250 transformer. I did that the year I spent in France for a TV or something we took over there. Be sure you get one that's big enough. Be sure you don't wire it backwards and get 250 to 500!!! Bob - AE6RV From: Mark C. Stephens ma...@non-stop.com.au To: time-nuts@febo.com time-nuts@febo.com Sent: Sunday, September 8, 2013 11:05 PM Subject: [time-nuts] Wavecrest DTS 2070 I just received my DTS 2070 from 110 volt land. I live in 230 (well actually 250) volt land. I haven't plugged it in and I am being a total wuss about breaking the CAL seals as they are still current. Please help me, I really, really need to measure something with it! Anything with it! But to do that I need to apply power! Is the DTS 2070 PSU auto sensing or do I need to change something? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Wavecrest DTS 2070
I pried open the fuse compartment. Both fuses black. Black as in dead short black. Not good. Short circuit on mains input. Open case. big thick wire carry mains to solid state relay then off to switch mode modules. Relay cannot be short between supplies. Must be one or more PSU with chopper or bridge short. Marki will have to be careful. Expensive and dangerous equipment at stake. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Monday, 9 September 2013 2:22 PM To: Bob Stewart; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 Oops. Maybe I should have just kept my peace. I found a User's Guide here: http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it can take either 110 or 220. Pry open the fuse compartment and see what's in there. Someone else will now probably post the right way to go about it, though. =) Bob - AE6RV From: Bob Stewart b...@evoria.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, September 8, 2013 11:13 PM Subject: Re: [time-nuts] Wavecrest DTS 2070 Go to a tourist supply store and buy a 110 to 230/250 transformer. I did that the year I spent in France for a TV or something we took over there. Be sure you get one that's big enough. Be sure you don't wire it backwards and get 250 to 500!!! Bob - AE6RV From: Mark C. Stephens ma...@non-stop.com.au To: time-nuts@febo.com time-nuts@febo.com Sent: Sunday, September 8, 2013 11:05 PM Subject: [time-nuts] Wavecrest DTS 2070 I just received my DTS 2070 from 110 volt land. I live in 230 (well actually 250) volt land. I haven't plugged it in and I am being a total wuss about breaking the CAL seals as they are still current. Please help me, I really, really need to measure something with it! Anything with it! But to do that I need to apply power! Is the DTS 2070 PSU auto sensing or do I need to change something? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Wavecrest DTS 2070
After removing endless hex screws to get at the insides I find the 24V/2A PSU that supplies the standby voltages has what appears to be a transformer primary short. Problem is, one has to remove the input board to get at the PSU screws. Sounds easy when put like that... I'll take some pix to show why I am so terrified of this input board. Looking at Eds teardown on http://www.eevblog.com/forum/testgear/wavecrest-dts-2077-teardown/?action=dlattach;attach=58083 Ed has a single standby switch mode - the small silver slotted box with the yellow wires. Mine is ancient and has 2 linear PSU, but hey, it's got the yellow wires! Anyway I have, used my post quota for the day - nite.. Oh before I go, luckily I checked, yes all the PSU (in this model) need strapping for utilised input voltage. I found a couple of expanded/exploded surface mount electro (tantalum?) caps on the filter board between the switch mode frame and the card cage. I have not a clue what that means.. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Monday, 9 September 2013 6:31 PM To: Bob Stewart; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 I pried open the fuse compartment. Both fuses black. Black as in dead short black. Not good. Short circuit on mains input. Open case. big thick wire carry mains to solid state relay then off to switch mode modules. Relay cannot be short between supplies. Must be one or more PSU with chopper or bridge short. Marki will have to be careful. Expensive and dangerous equipment at stake. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Monday, 9 September 2013 2:22 PM To: Bob Stewart; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 Oops. Maybe I should have just kept my peace. I found a User's Guide here: http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it can take either 110 or 220. Pry open the fuse compartment and see what's in there. Someone else will now probably post the right way to go about it, though. =) Bob - AE6RV From: Bob Stewart b...@evoria.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, September 8, 2013 11:13 PM Subject: Re: [time-nuts] Wavecrest DTS 2070 Go to a tourist supply store and buy a 110 to 230/250 transformer. I did that the year I spent in France for a TV or something we took over there. Be sure you get one that's big enough. Be sure you don't wire it backwards and get 250 to 500!!! Bob - AE6RV From: Mark C. Stephens ma...@non-stop.com.au To: time-nuts@febo.com time-nuts@febo.com Sent: Sunday, September 8, 2013 11:05 PM Subject: [time-nuts] Wavecrest DTS 2070 I just received my DTS 2070 from 110 volt land. I live in 230 (well actually 250) volt land. I haven't plugged it in and I am being a total wuss about breaking the CAL seals as they are still current. Please help me, I really, really need to measure something with it! Anything with it! But to do that I need to apply power! Is the DTS 2070 PSU auto sensing or do I need to change something? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Wavecrest DTS 2070
Hi Henk, mine has option a110. The linear supply is definitely strapped for 110v. I disconnected the primary and connected a 24v system supply in its place. Everything burst into life (at 110v, through step-down transformer) Haven't been game to try 230v yet... I guess I'll look at fix or replace 24v standby linear PSU. The second linear has me scratching my head, 2V@6A and is activated by solid state relay. Goes off to the card frame somewhere, haven't tried tracing yet. Definitely not looking forward to removing that monster bottom board. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Henk ten Pierick Sent: Monday, 9 September 2013 9:05 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 Hi, The 207x is. Auto sensing for the mains. Groet, Henk Op 9 sep. 2013 om 11:52 heeft Mark C. Stephens ma...@non-stop.com.au het volgende geschreven: After removing endless hex screws to get at the insides I find the 24V/2A PSU that supplies the standby voltages has what appears to be a transformer primary short. Problem is, one has to remove the input board to get at the PSU screws. Sounds easy when put like that... I'll take some pix to show why I am so terrified of this input board. Looking at Eds teardown on http://www.eevblog.com/forum/testgear/wavecrest-dts-2077-teardown/?act ion=dlattach;attach=58083 Ed has a single standby switch mode - the small silver slotted box with the yellow wires. Mine is ancient and has 2 linear PSU, but hey, it's got the yellow wires! Anyway I have, used my post quota for the day - nite.. Oh before I go, luckily I checked, yes all the PSU (in this model) need strapping for utilised input voltage. I found a couple of expanded/exploded surface mount electro (tantalum?) caps on the filter board between the switch mode frame and the card cage. I have not a clue what that means.. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Monday, 9 September 2013 6:31 PM To: Bob Stewart; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 I pried open the fuse compartment. Both fuses black. Black as in dead short black. Not good. Short circuit on mains input. Open case. big thick wire carry mains to solid state relay then off to switch mode modules. Relay cannot be short between supplies. Must be one or more PSU with chopper or bridge short. Marki will have to be careful. Expensive and dangerous equipment at stake. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Monday, 9 September 2013 2:22 PM To: Bob Stewart; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 Oops. Maybe I should have just kept my peace. I found a User's Guide here: http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it can take either 110 or 220. Pry open the fuse compartment and see what's in there. Someone else will now probably post the right way to go about it, though. =) Bob - AE6RV From: Bob Stewart b...@evoria.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, September 8, 2013 11:13 PM Subject: Re: [time-nuts] Wavecrest DTS 2070 Go to a tourist supply store and buy a 110 to 230/250 transformer. I did that the year I spent in France for a TV or something we took over there. Be sure you get one that's big enough. Be sure you don't wire it backwards and get 250 to 500!!! Bob - AE6RV From: Mark C. Stephens ma...@non-stop.com.au To: time-nuts@febo.com time-nuts@febo.com Sent: Sunday, September 8, 2013 11:05 PM Subject: [time-nuts] Wavecrest DTS 2070 I just received my DTS 2070 from 110 volt land. I live in 230 (well actually 250) volt land. I haven't plugged it in and I am being a total wuss about breaking the CAL seals as they are still current. Please help me, I really, really need to measure something with it! Anything with it! But to do that I need to apply power! Is the DTS 2070 PSU auto sensing or do I need to change something? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https
Re: [time-nuts] Wavecrest DTS 2070
Amazing Ed, I just had a invasive discography last Thursday! I have been a bit quiet because of a back injury too. We must be living parallel lives, fortunately my telly is still good, my 9 year old son has discovered Dr. Who so we are having great time watching it :) Some of the original series are a hoot :) so overdone but the Dalek's back then couldn't fly... Only 1000 for a crown, It would be cheaper for me to fly to Canada to get crown My last crown was disaster as a result the clown that put the crown in stuffed up and the crown snapped off at the root So added to the $2400 for the crown, I am now up for around 7K for an implant. The standby PSU tranny is dead short, zero ohm as compared to the 2v/6A supplies 8-10 ohm. Any idea what that 2V supply is for?, If I can lose the 2 linear PSU, I'll lose a ton of weight, but possibly at the expense of electrical noise. I was thinking that is why they used optics between the control board - to keep spurious noise to a minimum. Yeah, I did play roulette by powering it up like that but I was a tad annoyed as I was told it was a working unit. The bottom board on this one has millions of tiny surface mount caps mounted on there sides. It looks terribly fragile. Much of a job to get it out? All the PSU screw heads are under it (of course) -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Ed Palmer Sent: Tuesday, 10 September 2013 1:53 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 Sorry, the oracle is out of the office today - I'm the janitor. :) I see you've already replaced the 24V supply and powered the unit up. I would have removed all output connections on the supplies and tested them seperately. Are you sure about that transformer short? Remember that primaries on decent size line transformers only have something ike 2 to 4 ohms resistance at most. I wondered why yours was 12 lbs heavier than mine. Linear supplies - that would do it! The expanded/exploded capacitors could be just from age, or they could be from an output fault on the power supply that caused the voltage to go high. That's why I would have tested both power supplies offline. You said it's alive, but you haven't mentioned if it actually works. By the way, it turns out that I paid dearly for my good luck with the repair of my 2077. In the two weeks following that, I got a pinched nerve in my back that's still giving me trouble, I broke a big chunk off a tooth and am now scheduled for a crown at a cost of about $1000, and my big-screen TV died! :( Ed On 9/9/2013 1:01 AM, Mark C. Stephens wrote: Nod, this is the problem I have, It says 110/220 but is it automatic or do I need to change the strapping? I had a look at Ed Palmers excellent tear down and there were switch mode PSU in it. But he has a 2077, mines a 2070 so it could be completely different, or not.. Arrgh.. I am so wanting to plug it in, unlike Ed I have a place ready for it! I guess Oracle Palmer will be online later and will be able to provide an answer :) -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Monday, 9 September 2013 2:22 PM To: Bob Stewart; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 Oops. Maybe I should have just kept my peace. I found a User's Guide here: http://qmsi.com/pics/Wavecrest2070.a.pdf; which indicates it can take either 110 or 220. Pry open the fuse compartment and see what's in there. Someone else will now probably post the right way to go about it, though. =) Bob - AE6RV From: Bob Stewart b...@evoria.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, September 8, 2013 11:13 PM Subject: Re: [time-nuts] Wavecrest DTS 2070 Go to a tourist supply store and buy a 110 to 230/250 transformer. I did that the year I spent in France for a TV or something we took over there. Be sure you get one that's big enough. Be sure you don't wire it backwards and get 250 to 500!!! Bob - AE6RV From: Mark C. Stephens ma...@non-stop.com.au To: time-nuts@febo.com time-nuts@febo.com Sent: Sunday, September 8, 2013 11:05 PM Subject: [time-nuts] Wavecrest DTS 2070 I just received my DTS 2070 from 110 volt land. I live in 230 (well actually 250) volt land. I haven't plugged it in and I am being a total wuss about breaking the CAL seals as they are still current. Please help me, I really, really need to measure something with it! Anything with it! But to do that I need to apply power! Is the DTS 2070 PSU auto sensing or do I need to change something? --marki ___ time-nuts mailing list -- time-nuts@febo.com
Re: [time-nuts] Wavecrest DTS 2070
Is 200 amperes @ 2v not lethal? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Tuesday, 10 September 2013 6:58 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 -2V is a common terminator voltage for ECL In my days before gray hair I worked on a machine that for each rack had a 200A -2V power supply, a fully configured system had over 20 racks. On Mon, Sep 9, 2013 at 1:19 PM, paul swed paulsw...@gmail.com wrote: Just trying to figure out why a 2V power supply pretty curious. Regards Paul. On Mon, Sep 9, 2013 at 3:57 PM, Ed Palmer ed_pal...@sasktel.net wrote: I think there's lots of ECL in this thing. In 2012, Richard H McCorkle said that US Patent #6226231 was for part of the DTS-2075. It shows lots of ECL. My unit dates from around 2000 and doesn't have an obvious 3V3 supply, only 5V, 15V, and 24V. One of the 5V supplies might be adjusted for 5V2 and wired for negative voltage. I didn't check that. Ed On 9/9/2013 1:16 PM, paul swed wrote: 2.1 volt hmm maybe they are doing something with ECL. Say the common logic was 3.3 V adding a -2.1 would get you close to the 5.2V of ECL. Though these look new enough that ECL should not be in the mix. Regards Paul WB8TSL On Mon, Sep 9, 2013 at 2:54 PM, Ed Palmer ed_pal...@sasktel.net wrote: Hi Marki, On 9/9/2013 12:15 PM, Mark C. Stephens wrote: Amazing Ed, I just had a invasive discography last Thursday! I have been a bit quiet because of a back injury too. You're creeping me out Marki! We must be living parallel lives, fortunately my telly is still good, my 9 year old son has discovered Dr. Who so we are having great time watching it :) Some of the original series are a hoot :) so overdone but the Dalek's back then couldn't fly... I remember watching it when it was new in the early '60's. Scary. Only 1000 for a crown, It would be cheaper for me to fly to Canada to get crown My last crown was disaster as a result the clown that put the crown in stuffed up and the crown snapped off at the root So added to the $2400 for the crown, I am now up for around 7K for an implant. Geez, I hope I don't follow in your footsteps! Your 'parallel lives' comment now has me really worried. The standby PSU tranny is dead short, zero ohm as compared to the 2v/6A supplies 8-10 ohm. Any idea what that 2V supply is for?, Sorry, no clue. But my mainboard has a +2.1 volt test point so there's certainly a 'family resemblance' between our units. Mine must generate the +2.1 volts on the mainboard. If I can lose the 2 linear PSU, I'll lose a ton of weight, but possibly at the expense of electrical noise. I was thinking that is why they used optics between the control board - to keep spurious noise to a minimum. Yes, but I would have thought that optoisolators would have been cheaper than optical transmitters, receivers, and cables. Yeah, I did play roulette by powering it up like that but I was a tad annoyed as I was told it was a working unit. The bottom board on this one has millions of tiny surface mount caps mounted on there sides. It looks terribly fragile. Much of a job to get it out? Well, I described my process in the teardown. Is your board similar? Other than the front panel stuff, board removal is just a matter of unplugging connectors and unscrewing the mounting screws. All the PSU screw heads are under it (of course) Yup. I needed to get at the mounting screws for the cardcage so that I could inspect the motherboard. Ed -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-bounces@**fe** bo.comhttp://febo.com time-nuts-bounces@febo.**com time-nuts-boun...@febo.com] On Behalf Of Ed Palmer Sent: Tuesday, 10 September 2013 1:53 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 Sorry, the oracle is out of the office today - I'm the janitor. :) I see you've already replaced the 24V supply and powered the unit up. I would have removed all output connections on the supplies and tested them seperately. Are you sure about that transformer short? Remember that primaries on decent size line transformers only have something ike 2 to 4 ohms resistance at most. I wondered why yours was 12 lbs heavier than mine. Linear supplies - that would do it! The expanded/exploded capacitors could be just from age, or they could be from an output fault on the power supply that caused the voltage to go high. That's why I would have tested both power supplies offline. You said it's alive, but you haven't mentioned if it actually works. By the way
Re: [time-nuts] Wavecrest DTS 2070
Ah so the sparks scare you to death, well I can relate to that :) I fear we deviate off course Bob.. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Tuesday, 10 September 2013 7:39 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Wavecrest DTS 2070 Only if whatever shorts it vaporizes violently enough to kill you. When I worked at Burroughs in the 70s, I heard stories about low volts/high amps hijinks. Bob From: Mark C. Stephens ma...@non-stop.com.au To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, September 9, 2013 4:21 PM Subject: Re: [time-nuts] Wavecrest DTS 2070 Is 200 amperes @ 2v not lethal? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Wavecrest DTS 2070
I have seen a 12v car battery and a wire frame bed to torture victims on television twice now. Are you telling me that's bunk?! (pardon the pun) -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Jim Lux Sent: Tuesday, 10 September 2013 7:24 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Wavecrest DTS 2070 On 9/9/13 2:21 PM, Mark C. Stephens wrote: Is 200 amperes @ 2v not lethal? Not particularly.. any more than putting your fingers across a 1.5 or 3V battery is lethal. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] It's grandparent's day...
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Re: [time-nuts] NTP/1-PPS/RS232 question
Don't forget Hal, Flipping the PPS has the effect of moving the pulse by the length of the pulse so one gate in this case will move the pulse by 100MS. That is a capital M. We are talking Mega seconds here. So one hundred million seconds actually. Did I get that right? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Monday, 9 September 2013 7:13 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] NTP/1-PPS/RS232 question li...@rtty.us said: Actually if it's 100 ms late, you need 900 ms of inverter gates. At 4.5 ns per gate that would be 100,000 gates. If I did my math right, you are off by a factor of 2000. 900 ms is 900,000 uSec. If the delay per gate was 4.5 uSec that would take 200,000 gates. But the delay was nSec rather than uSec, so add 3 more zeros. My HC04 data sheet says 9 ns typical at 4.5 V, so I'll give you back the factor or 2. That leaves 100,000,000 gates. When I run out of things to do, I'll try to convert that to cubic meters, or houses/offices. Much easier to simply mod the code in the driver. Especially since the mod has already been done, at least for ntpd. All you have to do is add a line to the config file. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] New NTBW50AA
Dave, When you kick off LH Auto tune OSC parameters LH changes the elevation mask too. Oh yeah I was going to say, 3.63e-12 is getting awfully close to e-13, good stuff. Bob will tell you it's all pretty much mumbo jumbo past that point, you have one tight GPSDO now. And I seem to have all this back to front,, Is yours the new single board units (GPTSM) or do you have the GPSR? The GPSR has 1PPS but the GPTSM has even second only. (@ http://www.ko4bb.com/manuals/index.php?dir=05)_GPS_Timing/Nortel_GPS ) Its all clear as mud anyway, I bet there is 1PPS lurking on there somewhere. Some OEM could not live without it.. Check heathmsc.cpp for the fun cookies, let's be frank, life's too much of a drag without some fun :) Even if the fun is your little brother being eaten by the pigs (whatever that means ;) And to be Frank, I'd have to change my name (Boom-Boom) --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of quartz55 Sent: Monday, 9 September 2013 7:52 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] New NTBW50AA I did the a command and it seems to have straightened out. I don't know what I did but now it toggles from full screen to a window fine for now. It changed the el and amu masks. I'll let it run overnight see how it is and then try moving the antenna to what I think may be it's permanent position and see if it works there. I goggled the Lat Lon and it puts the antenna right on my deck where I have it. I notice the mouse acts erratically sometimes, I have a laptop I may press into service for this thing but it's a vista OS. I found lots of info in heather.cpp, but I wonder if the keyboard commands aren't somewhere easier to find, other than the space bar. It's gone up to 3.63e-12 now. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Wavecrest DTS 2070
I just received my DTS 2070 from 110 volt land. I live in 230 (well actually 250) volt land. I haven't plugged it in and I am being a total wuss about breaking the CAL seals as they are still current. Please help me, I really, really need to measure something with it! Anything with it! But to do that I need to apply power! Is the DTS 2070 PSU auto sensing or do I need to change something? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] nortel NTGS50AA embarrassing moment OCXO EFC Pin open circuit
Just in case someone ends up in the same boat with the EFC control voltage not reaching the EFC pin on the OCXO. Due to the plated through hole being accidently but inadvertently removed, for example red face You can pick off the EFC control voltage from TP23 next to the great big 4u7 NP SM cap on the other side of the oscillator package than the silk screen for the SMA/B connectors. Use some wire wrap wire from TP23 to the pin and you are set. Shame it happened but on the plus side, I got to reverse engineer the EFC D/A circuitry, well at least garner some information on its mechanics. It is of interest that the OCXO reference voltage out never seems to be used on many of these designs (HP Z3816A, Trimble NTGxx) This is the middle pin between RF out and EFC. If I am wrong about this, please pipe up as I am quite curious? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Friday, 6 September 2013 11:21 PM To: time-nuts@febo.com Subject: [time-nuts] nortel NTGS50AA embarrassing moment OCXO EFC Pin open circuit I got sent a duff NTGS50AA with a crook Trimble 49422C oscillator module. Not from Bob, he always checks his stuff, I have my vague suspicion this was sold as untested when the seller knew it was a dud.. Anyway, we are rearranging the workshop and I couldn't get to the Weller desolder station. All I had on hand was an Aoyue or however it is spelt. It is some such oem'ed or cheap copy of a hakko desolder pistol. People warned me, it won't get hot enough for what you are trying to do, but did I listen? Well, after pulling 3 plated through holes out, I wished I had. I fixed the ground and 10Mhz but I can't find the EFC. If someone has an NTGS50AA handy, please trace where the EFC pin on the ocxo goes to where (pin on IC, buffer transistor etc)? Cheers :) --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] New NTBW50AA
a) Hit s then s again in LH. (survey) b) something else caused red light (bad osc?) Adjust unit to correct UTC and co-ords may speed up. Where is the screen shot? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Sunday, 8 September 2013 3:44 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] New NTBW50AA Hi If it's trying to get a position *and* it goes below 4 sats due to antenna location, it will go to the red light mode. Once it's got a position it will hold in there with one sat. The modern nav GPS's are much more sensitive than the older GPSDO's, so you will need a better antenna location for them than for a new hand held. Bob On Sep 7, 2013, at 1:38 PM, quartz55 quart...@hughes.net wrote: OK, I got the thing started up, the com port seems to work with LH. Of course it says bad position. I've got a screen shot of the startup, after about 15 minutes the green LED went on, indicating lock, but after about a half hour, it went out and the red light went on indicating a fault according to the book I have. I turned it off after doing a screen shot. I'll post them later. I guess I need to figure out how to do a reset? According to the book, it should acquire the new position auto within 1 hour, but not sure about that. I got a good stiff 30VDC supply feeding it and the ripple is well under 100mV at the input to the connector. I found out don't stop the unit without exiting LH or it locks up the computer. The Nuvi GPS gizmo I have gets the signals inside my shack, so I guess it may be good outside in the clear above the roof. However, it may be hard to get the antenna out from under the trees. I'm going to Paris (VA) to see Sylvie and have a martini. I'll be back in a few hours. Dave N3DT ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] New NTBW50AA
Your screenshot is looking good, it is 30% through a 2000 sample survey. I don't know why you have a red LED. A red LED is generally hardware failure on the Trimble Nortel units AFAIK. Hit space bar in LH to get command help. Once you are used to LH it's a very powerful tool. e then e again writes everything to nvram. There are plenty of LH experts on the list, I have only recently really started to use LH of late due to the fact I have a great stack of HP smart clocks that use SCPI type commands. I have only just recently managed to get my hands on a couple of the NTG units. If the ADEV is what I think it is saying in LH, the Nortel/Trimble NTG are above average GPSDO! --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of quartz55 Sent: Sunday, 8 September 2013 8:41 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] New NTBW50AA I found the Menu M. Now to figure out what all these things mean. Do I want to write this to the eeprom not that it's settled down? 'E' Dave N3DT ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] New NTBW50AA
No worries, Dave, these Nortel/Trimble things are good bang for the dollars. My first one is sitting in the e-13's for PPS and OSC already - it's only been on 36 hours. I did replace the OXCO with a MV89A as the original osc was faulty, but, then again it only cost me $21.00 :) That's not quite as good as my best Z3805A (yet ;) Everything here runs off 24V, but don't forget the higher the voltage the less current you need too.. I have heard of people running as high as 55v, shocking huh? Not familiar with that term, but I hope the pigs chundered your little bro up again :) I got one of Bob's latest and greatest board, puts out a whacking great +10dB, so it can go straight into a case with no buffer required. I found a bunch of connectors for the backplane in the junk box. I'd love to get that orange LED to go green! Bob said 1PPS is lurking on the backplane too. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of quartz55 Sent: Sunday, 8 September 2013 9:27 AM To: Discussion of precise time and frequency measurement Subject: [time-nuts] New NTBW50AA Thanks Mark, yeah, I think I'm getting the hang of this thing. The ADEV is down to 1.032e-008 by this point. I think the red light was on because it was going out of lock, it couldn't find the satellites until I did a survey. Then things started coming into perspective when it found my position. At one point the osc was listed as bad. I just turned it off and started again and it seems fine now. Nothing seems even warm on the board with 30VDC going into it. That brick I had, I couldn't get the voltage out of it, so I canned that one. I think I can find a smaller supply than I've got though, this one is an old 10A 12V linear regulated supply that the regulator went out in. I haven't had this much fun since the pigs ate my little brother. Dave ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Raw GPS signal samples
I prefer to lug around my trusty old 5335A for the general bench work. Actually, I noticed the darn (5335a's) have been breeding in the store room, there is 7 of them there now! I wouldn't guarantee the Cal or if they work even though! Funnily enough, I have just kicked a 5334B out of the workshop today. Not because I seem to be accumulating counters like I am a frequency counter magnet or something but because I absolutely hate using it. It is like the early HP scope interfaces, ya just hate using the darn thing. The 5316A has a straightforward, easy to use interface. From memory there is even GPIB and OCXO reference options so you could do worse than that. Yeah cash, it's becoming a problem for us all here too I am afraid. You need to let us into the picture on what you will be using your counter for? If Cash is tight best to make it right choice first time, unless you get sold a lemon! Most of us can fix HP counters in our sleep by now, so plenty here can help you out. If you are thinking of getting into time nuttery and don't have a few spare bullion bars, give up now while you are still ahead ;) --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Collins, Graham Sent: Friday, 6 September 2013 10:10 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Raw GPS signal samples I stumbled across a web site which provides details on the use of GPS for ionospeheric research. http://chain.physics.unb.ca/chain/ under data products there is a link to raw GPS data which may or may not be suitable. You need to register in order to have access however. There are some details on the web site on their GPS's and what data they collect. All rather interesting. Cheers, Graham ve3gtc -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Peter Monta Sent: September-06-13 5:27 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Raw GPS signal samples I've got a raw wideband GPS capture, dual frequency L1/L2, on this page about my GPS/GNSS front-end board project: http://pmonta.com/blog/2012/06/04/gnss-firehose/ I plan to do a new spin of this board with some minor improvements as soon as I have the time. (For those who want to build the current board, that's fine, but there are a few missing loop-filter components that need to be added by hand. That fix will be included in the next version of course.) Cheers, Peter ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] nortel NTGS50AA embarrassing moment OCXO EFC Pin open circuit
I got sent a duff NTGS50AA with a crook Trimble 49422C oscillator module. Not from Bob, he always checks his stuff, I have my vague suspicion this was sold as untested when the seller knew it was a dud.. Anyway, we are rearranging the workshop and I couldn't get to the Weller desolder station. All I had on hand was an Aoyue or however it is spelt. It is some such oem'ed or cheap copy of a hakko desolder pistol. People warned me, it won't get hot enough for what you are trying to do, but did I listen? Well, after pulling 3 plated through holes out, I wished I had. I fixed the ground and 10Mhz but I can't find the EFC. If someone has an NTGS50AA handy, please trace where the EFC pin on the ocxo goes to where (pin on IC, buffer transistor etc)? Cheers :) --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] 2 questions on HP 5371A/5372A
1. what or where is the gate time for the 5371A/5372A 2. how do I turn that CRT off while making very l o n g GPIB measurements? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 2 questions on HP 5371A/5372A
Ah more people should take the leap, the broke ones are cheap and are moistly easy to fix and you have the almighty HP service manuals to guide you through the toughest of faults. Isn't it great how they even deal with handling multiple faults in the manual, although the great techs such as you Ed, break it up into blocks without thinking about it. Fortunately, the parts aren't too hard to come across, although you might be stretching it to get some of those hybrids... The 5372A will never take the place of the 5370B, so I guess the poor 5372A hasn't got time-Nut stamped on it.. But I was playing around with mine and I have to say it's fine for quick measurements. Well, Here's to R.T.F.M. (the fine one that is ;) Cheers, --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Ed Palmer Sent: Friday, 6 September 2013 11:29 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 2 questions on HP 5371A/5372A Geez, you'd think nobody had one of these things. 1. The 5372A doesn't use anything so common as gate time. No, it uses interval sampling instead. Take a look in the Operating Manual on page 1-23 Time Interval Measurement with Interval Sampling Arming. Clear as mud, isn't it? But that's what you want. The maximum gate time is 8 seconds. The same applies to frequency measurements. 2. The closest thing they've got to a screensaver is the Display Blank which really isn't anything close to a screensaver. :-( It's described on page 12-6. Ed On 9/5/2013 7:59 AM, Mark C. Stephens wrote: 1. what or where is the gate time for the 5371A/5372A 2. how do I turn that CRT off while making very l o n g GPIB measurements? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Ed Palmer - 5372A program
Ed, I seems to have lost your email address. I would love to get hold of your 5372A program you wrote? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] 05372-90010 - 5372A getting started guide
I have noticed that we have been searching for this document for some time now. Has anybody been able to turn up a soft copy? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] NTP/1-PPS/RS232 question
I did an article here: http://www.vk2hmc.net/blog/?p=583 About 1/2 way down the difference between TX/RX and control RS232 signals is explained. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims Sent: Monday, 19 August 2013 4:51 PM To: time-nuts@febo.com Subject: [time-nuts] NTP/1-PPS/RS232 question The board is for another project. It requires real RS-232 levels. There is a MAX3232 chip on it. Since the GPS has a 1PPS output, I figured that I might as well bring it out. There is no documentation on the pulse width or polarity... it is what it is... I'm probably hooking it straight to the '232 chip without any massaging. There is also one more available RS232 input pin on the chip. Any preferences for RTS or DTR? There is a jumper for powering the board from the RI pin (pin 9) of the RS-232 connector. - Yes, this is right. But watch the polarity. It is easy to get it wrong. In RS-232 the controls pins are different from the data pins. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] ThunderBolt Display
He threw a wobbly at me ): -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Dave M Sent: Friday, 16 August 2013 7:31 AM To: time-nuts@febo.com Subject: Re: [time-nuts] ThunderBolt Display Date: Thu, 15 Aug 2013 10:22:10 -0700 From: Eric Garner garn...@gmail.com Is anyone else having difficulty submitting a request for an order form? On Wed, Aug 14, 2013 at 10:36 AM, Chris Albertson albertson.ch...@gmail.com I sent an email requesting the order form; got a quick reply saying that he is getting a feel as to how many assemblies he needs to have made. He says that there are a number of repeat orders as well. I guess that we just need to be patient and he'll get back to each one that wants to place an order. Quoting his reply to me: === Hi David I am just getting a feel for numbers, but I will be able to send you an order form soon. Have you on the list though. I'm getting quite a few repeat orders from previous satisfied customers as well. I must have done something right. Will be in touch. Cheers, Adam, VK4GHZ Cheers, Dave M ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Samsung GCRU
Does anyone have the pin outs or photo of the front panel board for a Samsung GCRU (aka CHONGHO, GCRU-D) GPSDO? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Warped back to 1993
David, Well Done, your patch has breathed life into some refclocks I thought
had reached the end of the road.
--marki
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of David Malone
Sent: Wednesday, 14 August 2013 5:44 PM
To: Magnus Danielson
Cc: time-nuts@febo.com
Subject: Re: [time-nuts] Warped back to 1993
On Sun, Aug 11, 2013 at 03:12:00PM +0200, Magnus Danielson wrote:
I'm sure that the NTP drivers can be hacked to make necessary
adjustments without too much code.
I seem to have been caught by the same time warp (or a similar one) on a GPS
unit that I've been using with our NTP server since 1999.
I doubt I will be able to update the firmware, so I've made the change shown
below to the NTP NMEA refclock. It assumes that your GPS unit might be slow by
a multiple of 1024 weeks, and trys to get the timestamp within 512 weeks of the
current system time before feeding it to NTP.
The patch seems to work for me, though it may not be pedantically correct. Hal
might have some comments on if it could easily be improved. It might be an
interesting option to have in the NMEA driver, but it does seem a litle hacky.
David.
--- refclock_nmea.c.orig2010-11-10 03:38:22.0 +
+++ refclock_nmea.c 2013-08-13 20:05:44.0 +0100
@@ -979,6 +1076,8 @@
date.yearday = 0; /* make sure it's not used */
DTOLFP(pp-nsec * 1.0e-9, reftime);
reftime.l_ui += caltontp(date);
+ while (reftime.l_i + 512*7*86400 rd_timestamp.l_i)
+ reftime.l_i += 1024*7*86400;
/* $GPZDG postprocessing first... */
if (NMEA_GPZDG == sentence) {
___
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[time-nuts] FW: [ntp:questions] Start of new GPS 1024 week epoch
David Malone is on the ball Magnus, he replied to your post with a patch for nnmea refclock drver... The changes to reclock_nmea will be interesting to see over next few weeks.. I do hope it is officially picked up, as there are a lot of people stranded in 1993! --marki -Original Message- From: questions-bounces+marks=non-stop.com...@lists.ntp.org [mailto:questions-bounces+marks=non-stop.com...@lists.ntp.org] On Behalf Of David Malone Sent: Wednesday, 14 August 2013 5:30 AM To: questi...@lists.ntp.org Subject: Re: [ntp:questions] Start of new GPS 1024 week epoch Magnus Danielson mag...@rubidium.dyndns.org writes: Remember that any Sunday, it is likely that a GPS reciever have slipped a multiple of 1024 weeks. NTP drivers should be able to recognice it and compensate for it, as it is a re-occuring bug in many recievers. This issue have been discussed over and over again at time-nuts. It seems my ancient GPSclock 200 has recently slipped back to December 1993 too. Resetting it hasn't helped and I doubt I will be able to do a firmware update, so I've made a hack to refclock_nmea.c (version ntp-4.2.6p5), by replacing: reftime.l_ui += caltontp(date); with reftime.l_ui += caltontp(date); while (reftime.l_i + 512*7*86400 rd_timestamp.l_i) reftime.l_i += 1024*7*86400; I'm trying to adjust the timestamp given by NMEA might be slow by some multiple of 1024 weeks, and so tries to adjust it so that it is reasonably close to the system time associated with the read of the NMEA data. I'm not sure if I've got the code exactly bang-on, but it has got ntp running with the unit again. David. ___ questions mailing list questi...@lists.ntp.org http://lists.ntp.org/listinfo/questions ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Warped back to 1993
Please explain what happened today then? Also, the 2 module that I cannot set to the correct date are both Furino GT-77's. Over on the NTP list they are claiming it's the start of the new GPS 1024 week epoch. If you have a look at the rest of the days here: http://adn.agi.com/GNSSWeb/ Today was special. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Sunday, 11 August 2013 6:17 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Yes. This week is not the start of a new epoch. On Sun, Aug 11, 2013 at 10:10 AM, Hal Murray hmur...@megapathdsl.net wrote: ma...@non-stop.com.au said: Today is start of new epoch. As per: http://adn.agi.com/GNSSWeb/ 1753:0 Full GPS week since 1st epoch : day of week number 729:0 GPS Week since latest epoch : seconds of week at midnight for that day I don't think so. If this was a new epoch, that 729 would be 0 and the 1753 would be 2048. The 0s above are the day of week and seconds of week, nothing to do with the epoch. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Warped back to 1993
Yep Sorry, I see what you mean, can't be the GPS week rollover bug then. I am at a loss to explain this one then. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 6:33 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Please explain what happened today then? Also, the 2 module that I cannot set to the correct date are both Furino GT-77's. Over on the NTP list they are claiming it's the start of the new GPS 1024 week epoch. If you have a look at the rest of the days here: http://adn.agi.com/GNSSWeb/ Today was special. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Sunday, 11 August 2013 6:17 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Yes. This week is not the start of a new epoch. On Sun, Aug 11, 2013 at 10:10 AM, Hal Murray hmur...@megapathdsl.net wrote: ma...@non-stop.com.au said: Today is start of new epoch. As per: http://adn.agi.com/GNSSWeb/ 1753:0 Full GPS week since 1st epoch : day of week number 729:0 GPS Week since latest epoch : seconds of week at midnight for that day I don't think so. If this was a new epoch, that 729 would be 0 and the 1753 would be 2048. The 0s above are the day of week and seconds of week, nothing to do with the epoch. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Warped back to 1993
But according to Furuno it is a problem: http://www.furuno.com.cy/important-notice.html Important notice to our customers who use FURUNO GPS receivers for marine use that are affected by GPS week number rollover. [eRideOPUS GPS GNSS receivers are not affected by this matter.] We thank you very much for your trust and continued support. It is regretful to announce that there is a possibility that some of our GPS receivers and GPS-incorporated equipment (please see the list below) may face GPS positioning errors after 11th of August 2013, due to the problem of GPS week number roll-over. Huh?! -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 7:05 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Yep Sorry, I see what you mean, can't be the GPS week rollover bug then. I am at a loss to explain this one then. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 6:33 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Please explain what happened today then? Also, the 2 module that I cannot set to the correct date are both Furino GT-77's. Over on the NTP list they are claiming it's the start of the new GPS 1024 week epoch. If you have a look at the rest of the days here: http://adn.agi.com/GNSSWeb/ Today was special. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Sunday, 11 August 2013 6:17 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Yes. This week is not the start of a new epoch. On Sun, Aug 11, 2013 at 10:10 AM, Hal Murray hmur...@megapathdsl.net wrote: ma...@non-stop.com.au said: Today is start of new epoch. As per: http://adn.agi.com/GNSSWeb/ 1753:0 Full GPS week since 1st epoch : day of week number 729:0 GPS Week since latest epoch : seconds of week at midnight for that day I don't think so. If this was a new epoch, that 729 would be 0 and the 1753 would be 2048. The 0s above are the day of week and seconds of week, nothing to do with the epoch. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Warped back to 1993
Azelio, is your Furuno playing up? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Sunday, 11 August 2013 9:30 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 OK, good, found the bug. Now, iwe wish it were possible to download the firmware, make the correction and then upload... On Sun, Aug 11, 2013 at 1:14 PM, Magnus Danielson mag...@rubidium.dyndns.org wrote: On 08/11/2013 05:18 AM, Mark C. Stephens wrote: Okay this is what worked for me: 1. Removed power and antenna. 2. apply power with no antenna. 3. send :GPS:INIT:DATE 2007,08,11 4. plug antenna back in. For some reason if I used the correct date, the Z3815A warped back to 1993. But I am curious why did this happen today? GPS weeks begin on sundays. Today is first day of week 1753: http://csrc.ucsd.edu/scripts/convertDate.cgi?time=2013+08+11 Going back 1024 days gives you week 729 day 0, which occurs on 1993 12 26: http://csrc.ucsd.edu/scripts/convertDate.cgi?time=1993+12+26 A simple way to compensate for the lack of bits is to assume wrapping occurs, so week numbers lower than som value actually lacks 1024 weeks. A trivial code like this fixes this: if (week 729) week += 1024; Brilliant until you reach week 1753. I've seen this happen at 500 and 512. Cheers, Magnus --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 1:06 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Hal, I can't get it to take, I keep getting E-350 and the time does not change. Did you unplug the antenna or anything while you changed date? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Sunday, 11 August 2013 12:54 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 ma...@non-stop.com.au said: A Z3805A, a Z3815A and 58534A integrated timing antenna all think it's 26 Dec 1993. What happened?! ___ Is that off by 1024 weeks? (Looks close, but I haven't checked the details.) There is a week field in the GPS data stream. It's only 10 bits. I had that problem on a Z3801A. It did the right thing after I told it the date. :GPS:INIT:DATE 2011,12,26 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Warped back to 1993
Some of the GPS clocks think its 26 Dec 1993. A Z3805A, a Z3815A and 58534A integrated timing antenna all think it's 26 Dec 1993. What happened?! ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Warped back to 1993
Hal, I can't get it to take, I keep getting E-350 and the time does not change. Did you unplug the antenna or anything while you changed date? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Sunday, 11 August 2013 12:54 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 ma...@non-stop.com.au said: A Z3805A, a Z3815A and 58534A integrated timing antenna all think it's 26 Dec 1993. What happened?! ___ Is that off by 1024 weeks? (Looks close, but I haven't checked the details.) There is a week field in the GPS data stream. It's only 10 bits. I had that problem on a Z3801A. It did the right thing after I told it the date. :GPS:INIT:DATE 2011,12,26 -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Warped back to 1993
Okay this is what worked for me: 1. Removed power and antenna. 2. apply power with no antenna. 3. send :GPS:INIT:DATE 2007,08,11 4. plug antenna back in. For some reason if I used the correct date, the Z3815A warped back to 1993. But I am curious why did this happen today? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 1:06 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Hal, I can't get it to take, I keep getting E-350 and the time does not change. Did you unplug the antenna or anything while you changed date? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Sunday, 11 August 2013 12:54 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 ma...@non-stop.com.au said: A Z3805A, a Z3815A and 58534A integrated timing antenna all think it's 26 Dec 1993. What happened?! ___ Is that off by 1024 weeks? (Looks close, but I haven't checked the details.) There is a week field in the GPS data stream. It's only 10 bits. I had that problem on a Z3801A. It did the right thing after I told it the date. :GPS:INIT:DATE 2011,12,26 -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Warped back to 1993
I have 5 Z3805A and only one had the wrong date. They all have identical GPS modules and firmware so I don't know why just one decided to warp back to 1993. The Z3815A is still stuck at 1993, I can't even set it to 11 Aug 2007. (-1024) even with antenna unplugged and power cycle. I mean, Can set it to 11 Aug 2007, but after the 1st bird it sees it goes back to 1993. I might try a factory default and see how we go. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Joseph Gray Sent: Sunday, 11 August 2013 1:16 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 I just checked by Z3801A which is being monitored by SatStat on an old laptop. Mine is showing the correct date and time. Joe Gray W5JG On Sat, Aug 10, 2013 at 8:53 PM, Hal Murray hmur...@megapathdsl.net wrote: ma...@non-stop.com.au said: A Z3805A, a Z3815A and 58534A integrated timing antenna all think it's 26 Dec 1993. What happened?! ___ Is that off by 1024 weeks? (Looks close, but I haven't checked the details.) There is a week field in the GPS data stream. It's only 10 bits. I had that problem on a Z3801A. It did the right thing after I told it the date. :GPS:INIT:DATE 2011,12,26 -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Warped back to 1993
Nope, I tried all the resets I could find, I can set the date right but as soon as the Z3815A sees a bird, it jumps back to 1993. How annoying, Anyone else with a Z3815A having problems? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 2:40 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 I have 5 Z3805A and only one had the wrong date. They all have identical GPS modules and firmware so I don't know why just one decided to warp back to 1993. The Z3815A is still stuck at 1993, I can't even set it to 11 Aug 2007. (-1024) even with antenna unplugged and power cycle. I mean, Can set it to 11 Aug 2007, but after the 1st bird it sees it goes back to 1993. I might try a factory default and see how we go. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Joseph Gray Sent: Sunday, 11 August 2013 1:16 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 I just checked by Z3801A which is being monitored by SatStat on an old laptop. Mine is showing the correct date and time. Joe Gray W5JG On Sat, Aug 10, 2013 at 8:53 PM, Hal Murray hmur...@megapathdsl.net wrote: ma...@non-stop.com.au said: A Z3805A, a Z3815A and 58534A integrated timing antenna all think it's 26 Dec 1993. What happened?! ___ Is that off by 1024 weeks? (Looks close, but I haven't checked the details.) There is a week field in the GPS data stream. It's only 10 bits. I had that problem on a Z3801A. It did the right thing after I told it the date. :GPS:INIT:DATE 2011,12,26 -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Warped back to 1993
Today is start of new epoch. As per: http://adn.agi.com/GNSSWeb/ 1753:0 Full GPS week since 1st epoch : day of week number 729:0 GPS Week since latest epoch : seconds of week at midnight for that day So that explains what happened. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 1:19 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Okay this is what worked for me: 1. Removed power and antenna. 2. apply power with no antenna. 3. send :GPS:INIT:DATE 2007,08,11 4. plug antenna back in. For some reason if I used the correct date, the Z3815A warped back to 1993. But I am curious why did this happen today? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 11 August 2013 1:06 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 Hal, I can't get it to take, I keep getting E-350 and the time does not change. Did you unplug the antenna or anything while you changed date? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Sunday, 11 August 2013 12:54 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Warped back to 1993 ma...@non-stop.com.au said: A Z3805A, a Z3815A and 58534A integrated timing antenna all think it's 26 Dec 1993. What happened?! ___ Is that off by 1024 weeks? (Looks close, but I haven't checked the details.) There is a week field in the GPS data stream. It's only 10 bits. I had that problem on a Z3801A. It did the right thing after I told it the date. :GPS:INIT:DATE 2011,12,26 -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] 9390-55108 IRIG
I am trying to get a Datum 9390-55108 to work with NTPD using refclock driver 6. So far I have been unsuccessful. The output looks like IRIG-B (modulated 1Khz with 50% greater amplitude pulses) I can't get it to work with NTPD. Unless of course, my NTPD version is broken! Does anyone have information on these old type of 9390 that suggests the IRIG standard they output? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 9390-55108 IRIG
That one is about 10 years younger than this one :) I don't know why they called everything 9390, when the difference between generations is substantial. Probably a marketing decision.. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com Sent: Friday, 9 August 2013 9:46 PM To: time-nuts@febo.com Subject: Re: [time-nuts] 9390-55108 IRIG Didier has the 9390-6000 manual that has details of the IRIG ouputs for that, I wouldn't expect there to be too much difference, if any _http://www.ko4bb.com/manuals/index.php?dir=05%29_GPS_Timing/Datum_ (http://www.ko4bb.com/manuals/index.php?dir=05)_GPS_Timing/Datum) Regards Nigel GM8PZR In a message dated 09/08/2013 12:16:42 GMT Daylight Time, ma...@non-stop.com.au writes: I am trying to get a Datum 9390-55108 to work with NTPD using refclock driver 6. So far I have been unsuccessful. The output looks like IRIG-B (modulated 1Khz with 50% greater amplitude pulses) I can't get it to work with NTPD. Unless of course, my NTPD version is broken! Does anyone have information on these old type of 9390 that suggests the IRIG standard they output? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 9390-55108 IRIG
The refclock utilises AGC and winds the mixer input up to full volume. It is supposed to be a mic input so it would be over loaded. I think its AM as there is a carrier with peaks. Perhaps a picture from an oscilloscope would be a better way to describe it? Listening to it, I hear 1KHz and 50(100?)Hz hum? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Rob Kimberley Sent: Friday, 9 August 2013 10:03 PM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] 9390-55108 IRIG Mark, What is your ref clock driver 6 expecting to see? IRIG-B can be in a modulated or un-modulated form (Datum called this DC code) The DC code was usually TTL compatible PWM and the IRIG-B would be 3V pk-pk AM. Marker 8 cycles, 1 5 cycles and 0 2 cycles wide. Spaces 1V pk-pk. Rob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: 09 August 2013 12:16 To: time-nuts@febo.com Subject: [time-nuts] 9390-55108 IRIG I am trying to get a Datum 9390-55108 to work with NTPD using refclock driver 6. So far I have been unsuccessful. The output looks like IRIG-B (modulated 1Khz with 50% greater amplitude pulses) I can't get it to work with NTPD. Unless of course, my NTPD version is broken! Does anyone have information on these old type of 9390 that suggests the IRIG standard they output? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 9390-55108 IRIG
Rob, that's it - IRIG-B. Then I must look at the O/S / sound driver/codec. ALSA has replaced OSS which the driver was written to use. There is ALSA OSS emulation, which I am using. That is perhaps, the problem. I just have to find an older distribution that uses OSS and install it. Thanks for your Help! --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Rob Kimberley Sent: Friday, 9 August 2013 10:32 PM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] 9390-55108 IRIG https://www.google.co.uk/search?q=IRIG+Boe=utf-8rls=org.mozilla:en-GB:off icialclient=firefox-achannel=npgws_rd=crum=1ie=UTF-8hl=entbm=ischsou rce=ogsa=Ntab=wiei=-uAEUr7kILKo0AX1m4HYDgbiw=1440bih=728sei=_eAEUrLEMe e30QWUqIHQBQ#facrc=_imgrc=Mk-NE6fEBiUfvM%3A%3BU8oGSPcxYQPCsM%3Bhttp%253A%25 2F%252Fwww.meinbergglobal.com%252Fimages%252Ftime-code-irig.gif%3Bhttp%253A% 252F%252Fwww.meinbergglobal.com%252Fenglish%252Finfo%252Firig.htm%3B2464%3B1 260 Rob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: 09 August 2013 13:28 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] 9390-55108 IRIG The refclock utilises AGC and winds the mixer input up to full volume. It is supposed to be a mic input so it would be over loaded. I think its AM as there is a carrier with peaks. Perhaps a picture from an oscilloscope would be a better way to describe it? Listening to it, I hear 1KHz and 50(100?)Hz hum? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Rob Kimberley Sent: Friday, 9 August 2013 10:03 PM To: 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] 9390-55108 IRIG Mark, What is your ref clock driver 6 expecting to see? IRIG-B can be in a modulated or un-modulated form (Datum called this DC code) The DC code was usually TTL compatible PWM and the IRIG-B would be 3V pk-pk AM. Marker 8 cycles, 1 5 cycles and 0 2 cycles wide. Spaces 1V pk-pk. Rob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: 09 August 2013 12:16 To: time-nuts@febo.com Subject: [time-nuts] 9390-55108 IRIG I am trying to get a Datum 9390-55108 to work with NTPD using refclock driver 6. So far I have been unsuccessful. The output looks like IRIG-B (modulated 1Khz with 50% greater amplitude pulses) I can't get it to work with NTPD. Unless of course, my NTPD version is broken! Does anyone have information on these old type of 9390 that suggests the IRIG standard they output? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Rb video
Yup, Seller just emailed me. Something about antipodeans and convicts ;) -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Brooke Clarke Sent: Thursday, 8 August 2013 1:10 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Rb video Hi Mark: These only ship to the UK. Does not ship to the US Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Mark C. Stephens wrote: Seems they are rated to 5MHz according to the manufacturer.. They ebay item number is 161081736069. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Eric Garner Sent: Thursday, 8 August 2013 5:57 AM To: Steve G8EBM; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Rb video what's the performance of the distribution amplifier like? On Wed, Aug 7, 2013 at 9:12 AM, Steve G8EBM st...@g8ebm.com wrote: Great video. The distribution units are still available on eBay. I bought two today. Regards Steve G8EBM -Original Message- From: David J Taylor Sent: Tuesday, August 06, 2013 11:30 AM To: Time Nuts Subject: Re: [time-nuts] Rb video Found this on Hack-a-day http://www.youtube.com/watch?**v=chrzrod3tQYhttp://www.youtube.com/w a tch?v=chrzrod3tQY Cheers Raj, VU2ZAP Bangalore, India. ==**= Thanks for the pointer - I enjoyed that, particularly the PIC programming! 73, David GM8ARV -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listi n fo/time-nuts and follow the instructions there. __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listi n fo/time-nuts and follow the instructions there. -- --Eric _ Eric Garner ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Rb video
Seems they are rated to 5MHz according to the manufacturer.. They ebay item number is 161081736069. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Eric Garner Sent: Thursday, 8 August 2013 5:57 AM To: Steve G8EBM; Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Rb video what's the performance of the distribution amplifier like? On Wed, Aug 7, 2013 at 9:12 AM, Steve G8EBM st...@g8ebm.com wrote: Great video. The distribution units are still available on eBay. I bought two today. Regards Steve G8EBM -Original Message- From: David J Taylor Sent: Tuesday, August 06, 2013 11:30 AM To: Time Nuts Subject: Re: [time-nuts] Rb video Found this on Hack-a-day http://www.youtube.com/watch?**v=chrzrod3tQYhttp://www.youtube.com/wa tch?v=chrzrod3tQY Cheers Raj, VU2ZAP Bangalore, India. ==**= Thanks for the pointer - I enjoyed that, particularly the PIC programming! 73, David GM8ARV -- SatSignal Software - Quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listin fo/time-nuts and follow the instructions there. __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listin fo/time-nuts and follow the instructions there. -- --Eric _ Eric Garner ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] SDR Radio Opinion- Next Question
Hi Chris, The Mac OS X user base is also growing rapidly, with many preferring the X desktop to Winders. And, under the hood is BSD unix (sort of).. And there is MkLinux if you don't like OS X.. It depends of it you want to be the kind of ham who understands radios and can build and design them or the kind who would have never remove the cover off his commercial built radio. Linux is the best OS for developers and those who like to build gear. Windows is better for the appliance user crowd. --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] motorola GPS antenna connector
Can someone put a finger on the name (type) of the antenna connector on the Motorola GPS units in the HP Z3805, please? :DIAG:IDEN:GPS? COPYRIGHT 1991-1995 MOTOROLA INC.,SFTW P/N # 98-P39972M ,SOFTWARE VER # 8 ,SOFTWARE REV # 4 ,SOFTWARE DATE 13 JUL 1995,MODEL #B1121P1114 ,HDWR P/N # _ ,SERIAL # SSG0134726 ,MANUFACTUR DATE 6C08 ,OPTIONS LISTIB E-230 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] motorola GPS antenna connector
Can't seem to find anything in Aussie that is Called OSX connector. Could they be called MCX connector? We got some of those ): --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com Sent: Tuesday, 6 August 2013 7:43 PM To: time-nuts@febo.com Subject: Re: [time-nuts] motorola GPS antenna connector My records show the B1121P1114 as a 6 channel Oncore VP, which means it should be the same receiver as used in the Z3801A although I haven't looked to check that. The standard connector on these was what's known as an OSX Regards Nigel GM8PZR In a message dated 06/08/2013 10:25:27 GMT Daylight Time, ma...@non-stop.com.au writes: Can someone put a finger on the name (type) of the antenna connector on the Motorola GPS units in the HP Z3805, please? :DIAG:IDEN:GPS? COPYRIGHT 1991-1995 MOTOROLA INC.,SFTW P/N # 98-P39972M ,SOFTWARE VER # 8 ,SOFTWARE REV # 4 ,SOFTWARE DATE 13 JUL 1995,MODEL #B1121P1114 ,HDWR P/N # _ ,SERIAL # SSG0134726 ,MANUFACTUR DATE 6C08 ,OPTIONS LISTIB E-230 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Generate 1 PPS signal on serial port
I am not really sure what you are trying to do either.. If you are trying to tee the output of a GPS, make a Y cable and connect TxD from GPS and DCD to each end (as PPS and NMEA are broadcast or one way if you like) once the receiver has been configured. You will have timenuts having strokes if you try and do it in software! However if you are hell bent on generating PPS in software somehow (please let me know you plan? - curious) Use http://www.curioustech.net/xport.html Been around for years and its pretty good and free to boot. Or am I still looking at your problem from the wrong end? Personally, I am moving my NTP server to the parallel port shortly. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Eugen Sent: Tuesday, 6 August 2013 10:32 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Generate 1 PPS signal on serial port Marki the smart search engine came back with: Prof David Mills: http://www.eecis.udel.edu/~mills/ntp/html/pps.html Pulse-Per-Second (PPS) Signal Interfacing Hardware: http://www.vk2hmc.net/blog/?p=583 If using Linux you need kernel version 2.6.39.4 or version 3 kernel as the PPS interface is now included in the kernel. Unless of course, low latency and jitter is not an issue for you ;) You can use either parallel or serial PPS. For windows see http://www.davehart.net/ for binaries. David Taylor pretty much covers it here: http://www.satsignal.eu/ntp/NTP-on-Windows-Vista.html Thanks, but I need it the other way: the PC itself should generate the 1 PPS signal without an external reference, except the network connection to NTP servers. It's more of a software problem. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] SDR Radio Opinion- Next Question
That is true, Windows is great for Mr. Joe average, because of the ease of use, and because of the ease of use and user-base size, a lot of software has been developed for it. I use windows for a most tasks including software development and just to be compatible to everyone else. As you say, a lot of software is written for winders including professional programming IDE's etc. However, if Windows gets a virus or something breaks or corrupt, 9 times out of 10 you are screwed and have to reinstall. The great thing about Linux (Unix), there is always 101 ways to do the same thing, If something breaks, you can work around it until its fixed. Heck you can reinstall the GUI if you feel like it :) Each day I am drawn back to using Unix CLI and I have to say, I learn something new each day. As OS X roots are in a mature, robust OS (BSD), it is getting a great reputation as a robust but easy to use operating system. In fact, my next door neighbour has kicked his Windows out and bought a MAC! He is 82, and learning a new computing environment was not a trivial task for him and his wife. But he says he has never looked back. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Alberto di Bene Sent: Wednesday, 7 August 2013 7:04 AM To: time-nuts@febo.com Subject: Re: [time-nuts] SDR Radio Opinion- Next Question On 8/6/2013 5:12 AM, Chris Albertson wrote: /It depends of it you want to be the kind of ham who understands radios and can build and design them or the kind who would have never remove the cover off his commercial built radio.Linux is the best OS for developers and those who like to build gear. Windows is better for the appliance user crowd./ When I developed Winrad and my other SDR programs, a few years ago, I examined which were the tools available to a serious developer. My conclusion was that under Windows you could find professional tools, geared towards professional developments. What was available under Linux were little more than toys, meant for the hobbyists and the tinkerers. For example, at the time I was unable to find under Linux a development environment with the features and the power of the Embarcadero Rad Studio, which is what I use. This made me to choose Windows as my main platform. 73 Alberto I2PHD ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Heads up: Mark C. Stephens...
Yikes! I wish I had known earlier. Is it just SORBS or SpamCop, SpamHaus and WPBL as well? As remedial action I have turned off SORBS blocking. Really, sorry about this Bob, John, please resend, as I do value your correspondence even if SORBS led you to believe otherwise. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Monday, 5 August 2013 8:31 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Heads up: Mark C. Stephens... Hi I had the same problem with some stuff I tried to send Mark. Bob On Aug 5, 2013, at 5:29 AM, John Miles j...@miles.io wrote: Mark, I'm having trouble replying to your email, as your ISP is using a spam blacklist (SORBS) that blocks the SMTP servers used by the largest American cable ISP. Do you have another ISP you can use to receive email? -- john, KE5FX Miles Design LLC ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Heads up: Mark C. Stephens...
I agree with John, you can't go around blocking America's largest cable ISP! We have err opted out of using SORBS now. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of MailLists Sent: Monday, 5 August 2013 8:43 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Heads up: Mark C. Stephens... Good luck delisting a DNSBL listed IP (block) from those crusaders... Back some time there was a piss contest between some of those blacklists on which one would blacklist the whole internet faster. In the mean time different security providers bought up some of those rabid blacklists to power their antispam offerings, usually bundled with a security appliance. If you get caught in their web, you'll have a tough time to get delisted, usually denied with some puerile pretext, from obtuse criteria up to pure blackmail. On 8/5/2013 12:29 PM, John Miles wrote: Mark, I'm having trouble replying to your email, as your ISP is using a spam blacklist (SORBS) that blocks the SMTP servers used by the largest American cable ISP. Do you have another ISP you can use to receive email? -- john, KE5FX Miles Design LLC ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Generate 1 PPS signal on serial port
Marki the smart search engine came back with: Prof David Mills: http://www.eecis.udel.edu/~mills/ntp/html/pps.html Pulse-Per-Second (PPS) Signal Interfacing Hardware: http://www.vk2hmc.net/blog/?p=583 If using Linux you need kernel version 2.6.39.4 or version 3 kernel as the PPS interface is now included in the kernel. Unless of course, low latency and jitter is not an issue for you ;) You can use either parallel or serial PPS. For windows see http://www.davehart.net/ for binaries. David Taylor pretty much covers it here: http://www.satsignal.eu/ntp/NTP-on-Windows-Vista.html --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Eugen Sent: Tuesday, 6 August 2013 9:47 AM To: time-nuts@febo.com Subject: [time-nuts] Generate 1 PPS signal on serial port Probably this was asked before but in searches I only find how to use an external 1 PPS GPS signal for NTP synchronization. Having a Linux/FreeBSD PC synchronized using NTP/chrony, what would be the best way of generating an output 1 PPS signal on a (hardware) serial port ? For timing I've seen the standard libc functions from sys/time.h, like setitimer(), but maybe there are better ways for generating precise delays. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic
Second the WD-40 best label adhesive remover - and is so gentle it will leave the skin on aluminium.. Just spray it on and let it soak in. Can also start the lawn mower / Car / Boat with it, Fix squeaky hinges, lubricate locks.. -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of John Marvin Sent: Thursday, 1 August 2013 4:29 PM To: time-nuts@febo.com Subject: Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic I've found that a lot of sticky things, including sticker glue, is oil soluble. So I just use a liberal amount of vegetable oil with a cloth to dissolve the stuff and get rid of the goop. Then you are left with an oily surface (you probably shouldn't use this method on cloth which might be stained by the vegetable oil). The second stage of the process then can be a variety of cleaners to remove the liquid oil. Dove dishwashing soap can be quite effective. Anyway, this two step process works quite well for a lot of things that would take more work scrubbing and scraping otherwise. In many cases it does a better job, without having to use harsher chemicals. John On 7/31/2013 11:12 PM, Don Latham wrote: I haven't found anything that really removes sticker glue without scarring the paint. Of course, if you want provenance and history, leave 'em on :-) I'm only buying usb new and pre-1930 GR. Howareya? Heading for shooting tomorrow and on to see Argus, then to gun show. Just returned from marrying off step-grandson; Astoria WA. strange town. Don Dr. Edward H. Currie DW-40 is a good label goop remover ... - Original Message - From: Don Latham d...@montana.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, July 31, 2013 8:42 PM Subject: Re: [time-nuts] Removing goop was: =Re: 10811 Outer oven controller schematic Xylene is availble as goof-off in paint departments. Graham This has been an interesting discussion on how to remove goop from stuff. I find that one or the other of the common methyl or ethyl alcohols is sufficient in many cases to remove goop and has proven to be quite safe on almost all surfaces. When one of the common alcohols doesn't work I resort to a product marketed by Circa 1850 under the name of Super DeGooper. The label says it Removes these Goops: Oil Crayon, Tar, Marker, Gum, Labels, Shoe Polish, Adhesive, Duct Tape, Lipstick, Grease, stickers, Dried Latex Paint but in my experience is quite effect on much, much more and is safe on most surfaces. The caution label indicates that it contains xylene. Works for me and when it doesn't I then resort to the much stronger lacquer thinner or acetone. All are flammable and are used carefully with adequate ventilation. And when all else fails, good old scraping is used. cheers, Graham ve3gtc On 13-07-31 11:15 AM, Rex wrote: I suspect by gas he meant gasoline. I don't know about what paint remover he meant but I have another suggestion that might have worked. For cleaning label gunk off of used test equipment I have used automotive bug and tar remover. Seems to loosen up lots of gunk but not so strong it hurts the panel paint and lettering. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Neither the voice of authority nor the weight of reason and argument are as significant as experiment, for thence comes quiet to the mind. De Erroribus Medicorum, R. Bacon, 13th century. If you don't know what it is, don't poke it. Ghost in the Shell Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 Skype: buffler2 www.lightningforensics.com www.sixmilesystems.com ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Trimble Nortel GPSTM Boards
Buggy firmware? Anyone seen the firmware floating around? -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Jim Sanford Sent: Friday, 2 August 2013 10:46 AM To: time-nuts@febo.com Subject: Re: [time-nuts] Trimble Nortel GPSTM Boards I am seeing the same thing -- big jumps every single time a satellite is counted or not. Elevation mask 10 degrees, which should be very good and stable for my location. The unit also insists on converging to a bat altitude, then after a while declares stored position bad . .. then declares position good, even with bad altitude. Ideas appreciated. jimwb4...@amsat.org On 8/1/2013 6:31 AM, Bob Camp wrote: Hi You may have your elevation mask set to low for your antenna or a multi path issue from some other source. If the survey location is good to under a meter and the signals are good, there should be very little shift as sats are picked up or dropped. Bob On Aug 1, 2013, at 5:09 AM, gandal...@aol.com wrote: Hi Charles Thanks for your comments, the surveyed position on this is looking pretty good but what I have now realised is that the severity of the jumps seems very much related to the number of sattelites being tracked. Switching from 8 to 7, or 7 to 8, sats seems to produce the biggest step change whilst switching in either direction between 5 and 6, for example, doesn't seem to show up at all on the monitored DAC voltage. Ok, I take that back, it does still seem to depend on the number of sats being switched between but I've just seen a switch from 5 to 4 sats induce a very noticeable step change in DAC voltage, so the relationship doesn't appear to be linear. Unfortunately I need to power this down now for a few days but will investigate more later. Regards Nigel GM8PZR In a message dated 01/08/2013 09:45:24 GMT Daylight Time, charles_steinm...@lavabit.com writes: Nigel wrote: at times I'm seeing very noticeable step changes in the DAC voltage on this one as that happens. * * * I am a bit surprised by the extent, a Mark Sims online plot from 2012 shows some correlation on an NTGS50AA but not as noticeable as this, and I don't recall seeing anything quite so pronounced on a Thunderbolt. IME (with TBolts), the magnitude of the DAC steps with constellation changes varies with the accuracy of the positional data used by the GPS. To a point, the more accurate the survey, the smaller the DAC jumps will be. (Other errors prevent reducing the constellation-change DAC steps to zero.) Mark has commented here on survey accuracy, and the methods he used in Lady Heather to maximize it. Best regards, Charles ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS Spoofing
No better ground plane than salt water... --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart Sent: Monday, 29 July 2013 7:13 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] GPS Spoofing So, given the size of a typical freighter these days, what's so hard about imagining one with enough wire in the air to make that happen for whatever political or commercial reason? Bob From: Bob Camp li...@rtty.us To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, July 28, 2013 4:05 PM Subject: Re: [time-nuts] GPS Spoofing Hi So in this case we're talking about horrible to even more horrible in terms of efficiency. I'll freely grant that a 600' tower over a really good ground plane (like say the sea) is going to be way more efficient than anything I'd come up with. The same thing would apply to a matching network made of coils you can stand up inside compared to anything I'd make. Totally off topic - In the lobby of Continental Electronics they used to have this typical transmitter sitting there. You sort of wondered why. After looking at it you figured out the little ant down in the bottom was a person. Yes, the coils and stuff in Omega transmitters were *big*. Bob ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS Spoofing
The Helix coils are 25' high and have a 6' high relay: http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/8839335_kzKJLd#!i=2042047390k=QJbHKzM/ --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Monday, 29 July 2013 7:05 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] GPS Spoofing Hi So in this case we're talking about horrible to even more horrible in terms of efficiency. I'll freely grant that a 600' tower over a really good ground plane (like say the sea) is going to be way more efficient than anything I'd come up with. The same thing would apply to a matching network made of coils you can stand up inside compared to anything I'd make. Totally off topic - In the lobby of Continental Electronics they used to have this typical transmitter sitting there. You sort of wondered why. After looking at it you figured out the little ant down in the bottom was a person. Yes, the coils and stuff in Omega transmitters were *big*. Bob On Jul 28, 2013, at 4:23 PM, Tom Miller tmil...@skylinenet.net wrote: You can't use efficient antenna and 100 kHz in the same sentence. Oh, wait... - Original Message - From: J. Forster j...@quikus.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Sunday, July 28, 2013 3:06 PM Subject: Re: [time-nuts] GPS Spoofing The point about the duty cycle being low is correct. And, there are commercial linear power amps, like the used ones made by ENI and others, that can easily put out 1 kW plus narrow pulses. Furthermore, the pulse generator is trivial to make with a Rb, 3 or more Tektronix DD501s, a simple OR gate and a gated oscillator at about 100 kHz. I've cobbled up that setup several times as a LORAN-A simulator. The main difficulty is getting a reasonable match to an efficient antenna at 100 kHz. -John = Hi Since it's a pulse system, and you get to position your pulse for maximum effect, I don't see any reason to generate CW power. Simply mimic the lowest power slave in the chain. There's very little redundancy with Loran, so spoofing one station will mess it up. No need to mask the entire chain. At most you would need to hit two low power slaves. Math wise: Wavelength is 10,000 ft / 3,000M. Throw things off by ~10% of that and you have problems in a harbor. You would need to play a bit to see weather a pulse every so often does the trick or not. Is that 20 db below the slave or not ? You'd have to play with it. It's in that range. A spoof that says they are on the other side of the world isn't going to work. One that says you are on the north side of the channel (when you are on the south side) is what would work. Power within a pulse set at a 5:1 duty cycle. For a 50,000 us GRI you have another 50:1. For longer GRI's you might add another 2:1. Net is a peak to average ratio of 250-1000 to 1. Put another way, a 500W pulse is ~ 1 average. Power at 100 KHz = what's in a fairly cheap switching power supply. Plug it into the wall. A couple hundred watts (or even KW) pulse is cheap. Say you have 120W out of the wall (or a car battery). If the math above is correct and you can run 80% efficiency, that's a pretty powerful pulse. It's probably cheaper to generate something at 50:1 rather than the whole 200:1. A 5KW is a *lot* of RF, even into a simple antenna. Antenna - there's a couple ways to do that. All of them are tradeoffs (size / cost / power). The cheap way is to use a wire that's already there Since you don't need to propagate (near field), the antenna efficiency could be higher than you would think for some antennas. Is it easier than that with some smarts involved in the pulse - probably yes. Do the smarts raise the hardware cost significantly? - you'd have to build a few and find out. What really drives this or that Loran receiver nuts? I'm quite sure you could work that out with one to play with. Am I gong into the Loran-C jammer business? No, so don't contact me off list to buy one. The point is not *have* I built one, but could one be built easily. Bob On Jul 28, 2013, at 1:29 PM, Poul-Henning Kamp p...@phk.freebsd.dk wrote: In message dab33aef-98ef-4503-89a7-657f0d25a...@rtty.us, Bob Camp writes: I'm not talking about taking out Loran-C over the entire North Atlantic. The target is a harbor sized area. For that, you certainly do not need a 600' antenna or megawatts of power. No, you need about 600W (continuous) and a loop-antenna about 5m in diameter. Do the math, It's not as easy as you think. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by
Re: [time-nuts] RS 232
Quite right Bob, Echolink is one such program that doesn't automagically raise DTR when the port is opened. Anyway, I have gone Echo-IRLP now, much more robust running under unix. But I veer of topic.. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Saturday, 27 July 2013 11:16 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] RS 232 Hi If the driving program is written using the standard DLL's / libraries it's directly under control of that program. It's state will depend a lot on what the coder decided was right. Bob On Jul 26, 2013, at 9:07 PM, Hal Murray hmur...@megapathdsl.net wrote: ma...@non-stop.com.au said: It you can figure out how to raise DTR while your application has the port open it can be a good source of power for a RS232 device. Most OSes turn it on automagically when you open the file. (and turn it off when you close the file) -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Trimble Acutime Gold Firmware 1.13.0
Hi, Anyone know where I can get firmware 1.13.0 or greater for the Trimble Acutime gold? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] RS 232
It you can figure out how to raise DTR while your application has the port open it can be a good source of power for a RS232 device. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Friday, 26 July 2013 10:37 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] RS 232 Hi In order to get voltages from the other pins on the D connector: 1) You have to program them to be in the correct state (either high or low) 2) They have to be present on the driver side (usually, but not always true) 3) They need to be 3 V (diode drops etc...) 4) They need to supply enough current (as in no isolating resistors, usually true) 5) You need to have two of them to spare that meet these criteria (one positive and one negative) Its a little like rolling dice, sometimes it will work, sometimes it won't work. Bob On Jul 26, 2013, at 7:01 AM, ewkeh...@aol.com wrote: Since there is repeated request for the circuit se attachment. My question is what can be done to get a positive voltage from some of the other unused pins of the DB 9 connector. What is needed is any where from 3 to 15 volt. Diodes work with 1 mA but I set Rx for 2 mA. Any thing else look at H11 data sheet. Bert Kehren In a message dated 7/26/2013 4:06:37 A.M. Eastern Daylight Time, r...@sonic.net writes: FWIW, it was clear as mud for me too. Bert began with, Since joining time nuts over four years ago I have not used a single MAX 232 chip. Two reasons MAX do not give me isolation and do generate noise in critical applications. From that I took that he was doing RS232 using opto isolators. That implies + and - voltages to me. Where do they come from and where are they relative to the isolation boundary? If the goal is really isolation, how do these supplies get isolated? If the noise is cured by isolation, these details seem important as the supplies need isolation too. Maybe the switcher in the MAX232 is causing the noise. Then how do we get a negative supply from, say, +5V without the noise? Then, maybe he was saying RS232 sucks and this other way (not RS232 compatible) works better. The word picture of Bert's solution, which provided more details, left me less much less than clear too. Maybe I'm just not up on circuit shorthand terminology enough to follow what sort of current limiter is limiting what current to what, and what is being blocked by a diode from which negative level. Not really sure if I even got the big picture of what he is describing. Is it an isolated equivalent of a MAX232 interface or something else that wouldn't talk to an RS232 device? So, more clarification, or possibly that picture (~= 1k words) might help. Or maybe I'm just obtuse and everyone else is getting it. (Seems Marki may also be in the confused camp.) On 7/25/2013 3:34 PM, Mark C. Stephens wrote: Although your description, I prefer the use of two H11 opto couplers which work perfect. On the receiving end the diode along with a current limiter and blocking diode for the negative level works perfect. On the output side a power source is needed. Is a perfect circuit description, I'd be more confident with a schematic :) --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of ewkeh...@aol.com Sent: Friday, 26 July 2013 5:32 AM To: time-nuts@febo.com Subject: Re: [time-nuts] RS 232 I do not understand your question, I am referring to low noise applications like counters for dual mixers or other AV measurements, but also Shera and even Tbolt where external noise should be kept to a minimum. When you chase 1 E-14, isolation is key and I always like to err on the cautious side and as I stated we use blue tooth or USB but in the case of USB there are always H11 in the circuit. Some still like to use RS 232 and the subject came up and I have on my boards H11's like on the counter Corby uses but he ended up using an external power source and I like to eliminate that requirement. David had the right answer using the power that the RS 232 mouse uses out of a DB 9, started looking but I do not have one any more and I can not find any data. Bert In a message dated 7/25/2013 2:48:43 P.M. Eastern Daylight Time, ma...@non-stop.com.au writes: Hi Bert, I am sure your circuit is clear in your head, but would you mind attaching detail? You have perked my interest with the low-noise keyword ;) -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of ewkeh...@aol.com Sent: Thursday, 25 July 2013 11:39 PM To: time-nuts@febo.com Subject: [time-nuts] RS 232 Since joining time nuts over four years ago I have not used a single
Re: [time-nuts] Thunderbolt Power
Practically speaking Cisco came to the rescue for me. There are 2 Cisco solutions I use: 1. Cisco power brick from 1700's series routers. 2. Gutted Cisco chassis from 2600's series routers. Both supply more than sufficient power for a thunderbolt. I personally like option 2 as I can rack mount the TB. (http://www.vk2hmc.net/blog/?p=151) However As Bob said, make sure the 12V line is well regulated. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Saturday, 27 July 2013 4:39 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Thunderbolt Power Hi Ideally you would like 12 volts +/- 0.1 V, but +/-0.5 will work. 5V +/- 0.25 is best, but +/- 0.5 should work ok. -12 +/- 1V is ok, you can get away with something looser. What ever you have should be well regulated, at least on the +12 line. Bob On Jul 26, 2013, at 2:17 PM, steve gunsel st...@sgteq.com wrote: Hi, I recently purchased a surplus Trimble Thunderbolt and would like to get it going. The 24 volt units have a fairly wide range of acceptable voltages. The only power supply specs I can find for mine specify +5, -12 and +12. No min-max is specified. I have a power supply that has +5, +15 and -15 volts available that I'd like to use but not unless within acceptable limits. Does anyone know what the power supply specs are? Thanks. Steve N8MYA Medina, OH ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP Z3801 melted rubber feet. Heads up
I use this stuff called electronic circuit board cleaner made by RF Chemical technology in Australia. Dissolves the Goo like nothing I have seen (besides acetone), but is much safer than acetone with plastics and removes flux etc. An old toothbrush is handy for the stubborn spots. I did a post on it here: http://www.vk2hmc.net/blog/?p=86 --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: Saturday, 27 July 2013 11:55 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP Z3801 melted rubber feet. Heads up Reversion or not the goo is gone.. Plastic scraper for major stuff. Toilet paper to clean off the goo. It adheres to the goo really well. Good dose of alcohol and some qtips for the tight places. The boards and case are clean and not sticky. Back to integrating a 10544 oven in. Regards Paul. On Fri, Jul 26, 2013 at 8:24 PM, Pete Lancashire p...@petelancashire.comwrote: When at GE aerospace one of the departments near me spent a lot of money analyzing what accelorated reversion. I wish I still had one of the report that listed the usual scientific reasons such temp, ozone, etc etc .. but one had a reference to I think included sun spots and the temp at Stonehedge You take 100 samples from the same batch, and one we go to go and the other 99 will not. On Fri, Jul 26, 2013 at 4:54 PM, Joseph Gwinn joegw...@comcast.net wrote: time-nuts Digest, Vol 108, Issue 135 On Fri, 26 Jul 2013 18:58:26 -0400, time-nuts-requ...@febo.com wrote: Message: 5 Date: Fri, 26 Jul 2013 18:58:14 -0400 From: paul swed paulsw...@gmail.com To: paul swed paulsw...@gmail.com, Time-nuts time-nuts@febo.com Subject: [time-nuts] HP Z3801 melted rubber feet. Heads up Message-ID: cad2jfahn4h8ldzh0sywlf-dc3uot7wfp0dwnmjnet44r1nn...@mail.gmail.com Content-Type: text/plain; charset=ISO-8859-1 Beginning the process of installing a hp 10544 in what had held the Hp 10811 temporarily by adding some wires for power to the 10544. Pulled the main board out and what a mess I discovered. HP installed some rubber feet to support the main boards and they have melted and turned to gue. Whats interesting is the stuff ran all over the mainboard. Like it wicked upward. Can't be good and no idea if the stuff actually has conductivity to some level in this state. Seems to clean up well with rubbing alcohol. But will be a job and many cotton swabs will give their life in the process. Maybe the stuff is alive. Sounds like the feet were made of a polyurethane rubber. Polyurethane rubber and foam can spontaneously depolymerize, reverting to the goo from whence it came. High temperature and humidity speed things along. Google for urethane reversion (omit the quotes). Joe Gwinn ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP Z3801 melted rubber feet. Heads up
Z3805A has the same goo problem, The Z3815A well, that does have some rubber feet but it seems to survive well. The Z3816A relies on the bottom surface mount tantalums as buffer but is mainly supported by thick mounting posts. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Saturday, 27 July 2013 12:22 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP Z3801 melted rubber feet. Heads up Reversion or not the goo is gone.. ... I thought that problem was well known among Z3801A owners. I think I noticed it many years ago when browsing the web back around the time I got my first one. So far, I'm 3 for 3 on having goo rather than feet when I've opened them up, and I agree that it cleans up easily. Do other HP Z38xxx boxes have the same problem? (Just curious.) -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] testing L1 antenna
I have a number of GPS L1 timing antenna up, and I suspect one of them is not quite right. As a test procedure, all I can come up with is a power-injector connected to the feed line, the feed line connected to a DC block on the input of a 8566A SA. Then connect a known good antenna and compare the DUT. Note: I haven't tried this yet, still thinking about it :) Has anyone got a proven method to check a GPS timing antenna for reliable operation? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] testing L1 antenna
Thanks Tom, but the only RF genny I have is a pair of HP 8568B and a HP 8567A I think it is. The fan runs all the time on the 8567A so it mainly stays unplugged.. The only thing I have that can go that high is an 8350B Sweeper with a 83522A plugin (0.01-2.4 GHz). Can I utilise the sweeper somehow? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Tom Miller Sent: Thursday, 25 July 2013 4:58 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] testing L1 antenna You might generate a CW RF test signal at a level that allows easy detection on the SA. Maybe into a simple dipole antenna. A second dipole test antenna could establish a reference that you could relate the GPS antenna gain to. Tom - Original Message - From: Mark C. Stephens ma...@non-stop.com.au To: time-nuts@febo.com Sent: Thursday, July 25, 2013 2:51 AM Subject: [time-nuts] testing L1 antenna I have a number of GPS L1 timing antenna up, and I suspect one of them is not quite right. As a test procedure, all I can come up with is a power-injector connected to the feed line, the feed line connected to a DC block on the input of a 8566A SA. Then connect a known good antenna and compare the DUT. Note: I haven't tried this yet, still thinking about it :) Has anyone got a proven method to check a GPS timing antenna for reliable operation? --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] HP Agilent VLF Comparator Receiver 117A Frequency Standard - 60 KHz
Oh my gosh, a 117A has popped up on eBay! Looks in pretty good condition given its age... Seller claims the antenna will be listed shortly! Item # 281141315740 --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] RS 232
Hi Bert, I am sure your circuit is clear in your head, but would you mind attaching detail? You have perked my interest with the low-noise keyword ;) -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of ewkeh...@aol.com Sent: Thursday, 25 July 2013 11:39 PM To: time-nuts@febo.com Subject: [time-nuts] RS 232 Since joining time nuts over four years ago I have not used a single MAX 232 chip. Two reasons MAX do not give me isolation and do generate noise in critical applications. I prefer the use of two H11 opto couplers which work perfect. On the receiving end the diode along with a current limiter and blocking diode for the negative level works perfect. On the output side a power source is needed. If one uses an USB adapter it does have the + 5 volt which again works perfect. How ever many prefer to use RS 232 direct and that is why I hope to get some comments and suggestions from the list. Corby used on our counter circuit that he described a separate power source. Present MAX circuits use a + 1.4 volt threshold but considering legacy the question is what should the voltage swing be to make it compatible for most PC's and what options exist to get the necessary voltage. In the past other pins on the RS 232 port where an ideal power source. Still an option? Bert Kehren ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] RS 232
Although your description, I prefer the use of two H11 opto couplers which work perfect. On the receiving end the diode along with a current limiter and blocking diode for the negative level works perfect. On the output side a power source is needed. Is a perfect circuit description, I'd be more confident with a schematic :) --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of ewkeh...@aol.com Sent: Friday, 26 July 2013 5:32 AM To: time-nuts@febo.com Subject: Re: [time-nuts] RS 232 I do not understand your question, I am referring to low noise applications like counters for dual mixers or other AV measurements, but also Shera and even Tbolt where external noise should be kept to a minimum. When you chase 1 E-14, isolation is key and I always like to err on the cautious side and as I stated we use blue tooth or USB but in the case of USB there are always H11 in the circuit. Some still like to use RS 232 and the subject came up and I have on my boards H11's like on the counter Corby uses but he ended up using an external power source and I like to eliminate that requirement. David had the right answer using the power that the RS 232 mouse uses out of a DB 9, started looking but I do not have one any more and I can not find any data. Bert In a message dated 7/25/2013 2:48:43 P.M. Eastern Daylight Time, ma...@non-stop.com.au writes: Hi Bert, I am sure your circuit is clear in your head, but would you mind attaching detail? You have perked my interest with the low-noise keyword ;) -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of ewkeh...@aol.com Sent: Thursday, 25 July 2013 11:39 PM To: time-nuts@febo.com Subject: [time-nuts] RS 232 Since joining time nuts over four years ago I have not used a single MAX 232 chip. Two reasons MAX do not give me isolation and do generate noise in critical applications. I prefer the use of two H11 opto couplers which work perfect. On the receiving end the diode along with a current limiter and blocking diode for the negative level works perfect. On the output side a power source is needed. If one uses an USB adapter it does have the + 5 volt which again works perfect. How ever many prefer to use RS 232 direct and that is why I hope to get some comments and suggestions from the list. Corby used on our counter circuit that he described a separate power source. Present MAX circuits use a + 1.4 volt threshold but considering legacy the question is what should the voltage swing be to make it compatible for most PC's and what options exist to get the necessary voltage. In the past other pins on the RS 232 port where an ideal power source. Still an option? Bert Kehren ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] RS 232
Hi Hal, according to ntp.org the parallel port is also usable for PPS: http://www.eecis.udel.edu/~mills/ntp/html/pps.html Also, Take a look at this gentleman's page (Chrome will translate): http://www.finetune.co.jp/~lyuka/interests/radio/gps/ there is quite a difference between the amount of jitter between the two interfaces! But, you know at the end of the Day, Anything over Ethernet network will slowly take apart the carefully built NTP server you built with its precision time source anyway :) Looking around, PPS over TTY is better supported and easier to interface. Where do we draw the line and say, enough is enough?! -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Friday, 26 July 2013 9:17 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] RS 232 j...@miles.io said: Agreed, nobody should be using RS232 for anything nowadays. RS232 works much better for capturing PPS timing. Another advantage of RS232 over USB is that the configuration is stable when things get unplugged and replugged, or powered off, or ... Of course, that's a disadvantage if your program wants to know when the gizmo got unplugged. -- These are my opinions. I hate spam. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Agilent / HP 117A on eBay...
Hi Pete, I have a 14 diameter choke ring GPS L1 with a big spike on the top of it, on the peak of the roof :) That certainly gets some stares! As the HP antenna is VLF, is the Antenna Huge? I can't reliably get WWVB in Australia. Lots of fading etcetera, or I'd be in there like a shot :) We do have a beer called VB hmmm.. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Pete Lancashire Sent: Friday, 26 July 2013 10:50 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Agilent / HP 117A on eBay... I still would like to find one of the HP antenna's just for the looks. Even the 10509A with 13CW4's .. ok the FET version would be better. At least give those passing by something else to point at :-) -pete On Thu, Jul 25, 2013 at 7:09 AM, Burt I. Weiner b...@att.net wrote: I always wanted on, but with the intention of using it. To bad it's now useless now with the new WWVB format, otherwise I'd buy it. Antennas I got. Burt, K6OQK At 06:14 AM 7/25/2013, time-nuts-requ...@febo.com wrote Would this box work with the new WWVB format? On 07/25/2013 04:07 AM, Mark C. Stephens wrote: Oh my gosh, a 117A has popped up on eBay! Looks in pretty good condition given its age... Seller claims the antenna will be listed shortly! Item # 281141315740 --marki Burt I. Weiner Associates Broadcast Technical Services Glendale, California U.S.A. b...@att.net www.biwa.cc K6OQK __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listin fo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 10811 update
Sorry mate, this isn't much help, I haven't heave of any of these, must be before my time?! Mat Struct Pc Ucb Uce Ueb Ic Tj Ft Cc, pF Hfe Caps 1. 2N6429http://alltransistors.com/transistor.php?transistor=5816 Si NPN 0.625 55 45 6 0.2 175 100 3 400 TO92 2. NTE2341http://alltransistors.com/transistor.php?transistor=44370 Si NPN 1 100 80 7 1 2000 TO92 3. NTE46http://alltransistors.com/transistor.php?transistor=44457 Si NPN 0.625 100 100 12 0.5 1 TO92 4. NTE48http://alltransistors.com/transistor.php?transistor=44458 Si NPN 1 60 50 12 1 25000 TO92 5. SM2285http://alltransistors.com/transistor.php?transistor=45948 Si NPN 1 0 100 0 0.2 200 150 600 TO92 6. STL73Dhttp://alltransistors.com/transistor.php?transistor=50901 Si NPN 0 700 400 0 1.5 0 TO92 7. STX112http://alltransistors.com/transistor.php?transistor=50927 Si NPN 0 100 100 0 2 1000 TO92 8. STX616http://alltransistors.com/transistor.php?transistor=50930 Si NPN 0 980 500 0 1.5 0 TO92 -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: Thursday, 25 July 2013 11:29 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] HP 10811 update Well learned quite a bit Q4 does have an issue. Further there is a reason it has such high Beta. Its must deliver 30 ma to the oscillator and buffer. I was quite surprised by this current level. I was guessing the oscillator was a few mils and the buffer maybe 8. The 2n3904 simply does not cut it. Need to do some digging in the ole transistors. Regards Paul. On Wed, Jul 24, 2013 at 8:06 PM, paul swed paulsw...@gmail.commailto:paulsw...@gmail.com wrote: I can hope I will embed a k thermocouple also. On Wed, Jul 24, 2013 at 7:45 PM, Bob Camp li...@rtty.usmailto:li...@rtty.us wrote: Hi The regulator should be fixed, and the OCXO will work better with it repaired. That said, shifting the regulated voltage from 5.7 to 5.27 volts should not shift that oscillator 45 Hz. Bob On Jul 24, 2013, at 9:00 AM, paul swed paulsw...@gmail.commailto:paulsw...@gmail.com wrote: Hello to the group. Numbers of threads running on the HP 10811. Mine is 45 Hz low. The oven is most likely ok. I did get the can open per the various other threads and the web pix. Started testing the circuits and have found that the regulator for the oscillator isn't. Its supposed to produce 5.7V and is at 5.27V thats pretty significant. The transistor looks like a shorted collector base junction. Though I do not have it out of circuit yet. Its Q4 a 2n6429. What interesting about this transistor is its beta at 1 ma is 500 min and max is 1300. Its not a darlington. Thats pretty amazing. I am looking through my xsistors to find something close. May just through a 2n3904 in for a quick test. Its beta is nothing like the 6429. But it would help to prove/disprove the point that the low V may be offsetting the oscillator I hope. Will also embed a K thermal couple to verify the oven really is in the 80-84C region. Regards Paul. WB8TSL ___ time-nuts mailing list -- time-nuts@febo.commailto:time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.commailto:time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.commailto:time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.
Bob Camp bought up an interesting point, using a PAD will cut the voltage going up the spout to the antenna amplifier. I am using a distribution amp that separately powers the GPS antenna so did not take this into consideration. If you try the PAD, measure the voltage output of the pad to make sure that enough voltage is getting through to power your antenna's preamp, please? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 21 July 2013 2:01 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. Azelio, I had an interesting experience with the same symptoms tonight. I inserted a 6 dB pad on the antenna input and it appears to alleviated the problem. Perhaps the GPS module is being overloaded with too much signal? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Tuesday, 16 July 2013 5:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. I have a 58503 that occasionally is not able to track satellites. Usually I wait until the holdover expires but then the only fix seems to restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a command to reset only the GPS receiver but it is not in the 58503 manual. On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote: I have a Z3816A and it periodically jumps into holdover with error message: Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours it gradually adjusts the phase alignment. The error message is Recovery: phase alignment [TI +435.5 us] (when I noticed it had changed, they figure was likely to have been much higher) The TI then gradually decreases, currently it is sitting on: Recovery: phase alignment [TI +129.9 us] I am hoping that I won't have to power cycle the GPSDO to get it locked again. I emailed the seller (Yixun HK) and they are trying to tell me power cycle is only fix. They also claim the cause is due to weather? I explained to Yixun I have a lot of smart clocks here and none have exhibited the same problem ever. This is the 3rd defective Z3816A I have got off Yixun and it is costing me a small fortune to send these back. The first was reporting the 12v Supply was out of tolerance, a quick jump into pForth confirmed the A, B and C 12v supplies were over 12.5v. I ended up sending it back to Yixun. The second I was able to fix myself, apparently someone had changed the OCXO but left the insulating-spacing washers out from the pins of the OCXO. This was causing a short on the EFC. That Z3816A unit and now appears to be running normally except the PU is terrible, I'll run Cal for 24 hours and see if it improves. However, Now the 3rd unit is getting this TI exceeded error. I think I have had enough of shipping things back to these guys - they won't replace anything, including parts, unless you ship back to them first. I would just like to get some informed opinions, could the issue be with: a) Antenna b) GPS Module c) OCXO d) PLL circuit on main board. Many thanks, --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Z3801A Freq jumping
George, Looking at your graph, as far as I can see, the EFC jumps appear to be tied to the TI From the graph, your hitting +/- ~750ns. Normally, one sees +/- ~50ns. nax (although one particular basket case I have goes up into the milliseconds occasionally, It is a defective GPS module, I have proved this by swapping the module with another unit and the fault follows the GPS module.) I am not sure of the mechanics of how the EFC follows TI, perhaps one of the other members can chime in? -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of George Sintchak Sent: Tuesday, 23 July 2013 1:30 AM To: time-nuts@febo.com Subject: [time-nuts] Z3801A Freq jumping Hello all - Not sure what's happening to my Z3801A. Doesn't unlock, but EFC jumping all over. Is my oven controller dieing? I did a reacquire satellites abt 10 days ago - no difference. See plot below of the last ~36 days. Any thing to try - restart from cold, etc ??? George ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Z3801A Freq jumping
George, The Z3816A is 8 channel, the Z3801A is 6 channel. What is the problem with the Z3816A? EFC error? -marki -Original Message- From: George Sintchak [mailto:wa2...@optonline.net] Sent: Tuesday, 23 July 2013 12:34 PM To: Mark C. Stephens; time-nuts@febo.com Subject: Re: [time-nuts] Z3801A Freq jumping OK Marki, I have a Z3816 with a possible bad 5 MHz oscillator. Maybe I can swap out the GPS rcvr. I have to see if they are compatible. Does anyone out there know? Tnx, George - Original Message - From: Mark C. Stephens ma...@non-stop.com.au To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Monday, July 22, 2013 12:32 PM Subject: RE: [time-nuts] Z3801A Freq jumping George, Looking at your graph, as far as I can see, the EFC jumps appear to be tied to the TI From the graph, your hitting +/- ~750ns. Normally, one sees +/- ~50ns. nax (although one particular basket case I have goes up into the milliseconds occasionally, It is a defective GPS module, I have proved this by swapping the module with another unit and the fault follows the GPS module.) I am not sure of the mechanics of how the EFC follows TI, perhaps one of the other members can chime in? -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of George Sintchak Sent: Tuesday, 23 July 2013 1:30 AM To: time-nuts@febo.com Subject: [time-nuts] Z3801A Freq jumping Hello all - Not sure what's happening to my Z3801A. Doesn't unlock, but EFC jumping all over. Is my oven controller dieing? I did a reacquire satellites abt 10 days ago - no difference. See plot below of the last ~36 days. Any thing to try - restart from cold, etc ??? George ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Lucent RFTG-U - add GPS module
I noticed the Lucent RFTG-U has mounting for a Motorola type GPS module. Has anyone successfully mounted a GPS module in a Lucent RFTG-U and got it working? Different firmware? -marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] 10811 Outer oven controller schematic
Warren S and I have posted details of an outer oven controller for the 10811 double oven series here: http://www.vk2hmc.net/blog/?p=526 --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.
Azelio, I had an interesting experience with the same symptoms tonight. I inserted a 6 dB pad on the antenna input and it appears to alleviated the problem. Perhaps the GPS module is being overloaded with too much signal? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Tuesday, 16 July 2013 5:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. I have a 58503 that occasionally is not able to track satellites. Usually I wait until the holdover expires but then the only fix seems to restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a command to reset only the GPS receiver but it is not in the 58503 manual. On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote: I have a Z3816A and it periodically jumps into holdover with error message: Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours it gradually adjusts the phase alignment. The error message is Recovery: phase alignment [TI +435.5 us] (when I noticed it had changed, they figure was likely to have been much higher) The TI then gradually decreases, currently it is sitting on: Recovery: phase alignment [TI +129.9 us] I am hoping that I won't have to power cycle the GPSDO to get it locked again. I emailed the seller (Yixun HK) and they are trying to tell me power cycle is only fix. They also claim the cause is due to weather? I explained to Yixun I have a lot of smart clocks here and none have exhibited the same problem ever. This is the 3rd defective Z3816A I have got off Yixun and it is costing me a small fortune to send these back. The first was reporting the 12v Supply was out of tolerance, a quick jump into pForth confirmed the A, B and C 12v supplies were over 12.5v. I ended up sending it back to Yixun. The second I was able to fix myself, apparently someone had changed the OCXO but left the insulating-spacing washers out from the pins of the OCXO. This was causing a short on the EFC. That Z3816A unit and now appears to be running normally except the PU is terrible, I'll run Cal for 24 hours and see if it improves. However, Now the 3rd unit is getting this TI exceeded error. I think I have had enough of shipping things back to these guys - they won't replace anything, including parts, unless you ship back to them first. I would just like to get some informed opinions, could the issue be with: a) Antenna b) GPS Module c) OCXO d) PLL circuit on main board. Many thanks, --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 10811 Outer oven controller schematic
The original post has updated Circuit (different transistors and less minor changes) Also now included is the circuit of the inner oven controller. http://www.vk2hmc.net/blog/?p=526 -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark C. Stephens Sent: Sunday, 21 July 2013 1:21 AM To: time-nuts@febo.com Subject: [time-nuts] 10811 Outer oven controller schematic Warren S and I have posted details of an outer oven controller for the 10811 double oven series here: http://www.vk2hmc.net/blog/?p=526 --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.
I did a quick check of the antenna current on a normal (un-attenuated) vs. the attenuated receiver: Normal: Antenna current: 26.470589 Attenuated: Antenna current: 32.352940 Slightly higher, but well within range. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Sunday, 21 July 2013 8:24 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. OK, interesting but putting an attenuator on the antenna input seems not a good idea when there are 5V present... On Sat, Jul 20, 2013 at 6:01 PM, Mark C. Stephens ma...@non-stop.com.au wrote: Azelio, I had an interesting experience with the same symptoms tonight. I inserted a 6 dB pad on the antenna input and it appears to alleviated the problem. Perhaps the GPS module is being overloaded with too much signal? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Tuesday, 16 July 2013 5:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. I have a 58503 that occasionally is not able to track satellites. Usually I wait until the holdover expires but then the only fix seems to restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a command to reset only the GPS receiver but it is not in the 58503 manual. On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote: I have a Z3816A and it periodically jumps into holdover with error message: Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours it gradually adjusts the phase alignment. The error message is Recovery: phase alignment [TI +435.5 us] (when I noticed it had changed, they figure was likely to have been much higher) The TI then gradually decreases, currently it is sitting on: Recovery: phase alignment [TI +129.9 us] I am hoping that I won't have to power cycle the GPSDO to get it locked again. I emailed the seller (Yixun HK) and they are trying to tell me power cycle is only fix. They also claim the cause is due to weather? I explained to Yixun I have a lot of smart clocks here and none have exhibited the same problem ever. This is the 3rd defective Z3816A I have got off Yixun and it is costing me a small fortune to send these back. The first was reporting the 12v Supply was out of tolerance, a quick jump into pForth confirmed the A, B and C 12v supplies were over 12.5v. I ended up sending it back to Yixun. The second I was able to fix myself, apparently someone had changed the OCXO but left the insulating-spacing washers out from the pins of the OCXO. This was causing a short on the EFC. That Z3816A unit and now appears to be running normally except the PU is terrible, I'll run Cal for 24 hours and see if it improves. However, Now the 3rd unit is getting this TI exceeded error. I think I have had enough of shipping things back to these guys - they won't replace anything, including parts, unless you ship back to them first. I would just like to get some informed opinions, could the issue be with: a) Antenna b) GPS Module c) OCXO d) PLL circuit on main board. Many thanks, --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.
Bob - Pad is connected between Distribution amp that powers antenna from separate supply. Good idea. I haven't bothered measuring the voltage at the output of the pad, perhaps a simple calculation for you? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Sunday, 21 July 2013 12:06 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. Hi Pad = resistor in series with the dc. That will drop the voltage on the amp in the antenna. Not a good idea. Bob Sent from my iPhone On Jul 20, 2013, at 9:26 PM, Mark C. Stephens ma...@non-stop.com.au wrote: I did a quick check of the antenna current on a normal (un-attenuated) vs. the attenuated receiver: Normal: Antenna current: 26.470589 Attenuated: Antenna current: 32.352940 Slightly higher, but well within range. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Sunday, 21 July 2013 8:24 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. OK, interesting but putting an attenuator on the antenna input seems not a good idea when there are 5V present... On Sat, Jul 20, 2013 at 6:01 PM, Mark C. Stephens ma...@non-stop.com.au wrote: Azelio, I had an interesting experience with the same symptoms tonight. I inserted a 6 dB pad on the antenna input and it appears to alleviated the problem. Perhaps the GPS module is being overloaded with too much signal? --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Tuesday, 16 July 2013 5:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. I have a 58503 that occasionally is not able to track satellites. Usually I wait until the holdover expires but then the only fix seems to restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a command to reset only the GPS receiver but it is not in the 58503 manual. On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote: I have a Z3816A and it periodically jumps into holdover with error message: Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours it gradually adjusts the phase alignment. The error message is Recovery: phase alignment [TI +435.5 us] (when I noticed it had changed, they figure was likely to have been much higher) The TI then gradually decreases, currently it is sitting on: Recovery: phase alignment [TI +129.9 us] I am hoping that I won't have to power cycle the GPSDO to get it locked again. I emailed the seller (Yixun HK) and they are trying to tell me power cycle is only fix. They also claim the cause is due to weather? I explained to Yixun I have a lot of smart clocks here and none have exhibited the same problem ever. This is the 3rd defective Z3816A I have got off Yixun and it is costing me a small fortune to send these back. The first was reporting the 12v Supply was out of tolerance, a quick jump into pForth confirmed the A, B and C 12v supplies were over 12.5v. I ended up sending it back to Yixun. The second I was able to fix myself, apparently someone had changed the OCXO but left the insulating-spacing washers out from the pins of the OCXO. This was causing a short on the EFC. That Z3816A unit and now appears to be running normally except the PU is terrible, I'll run Cal for 24 hours and see if it improves. However, Now the 3rd unit is getting this TI exceeded error. I think I have had enough of shipping things back to these guys - they won't replace anything, including parts, unless you ship back to them first. I would just like to get some informed opinions, could the issue be with: a) Antenna b) GPS Module c) OCXO d) PLL circuit on main board. Many thanks, --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Lecia L1 GPS chokering antenna voltage,
I contacted Leica Australia sales requesting help regarding the unknown Leica GPS L1 Choke Ring antenna Monday morning. The sales person duly referred me to support and I had a call back within 30 minutes. The support staff spent the entire morning assisting me to identify this antenna. The support started with phone calls and was followed by an amount of email. As you all know, getting information out of the big 3 in precision time and frequency has become a waste of time and frustrating. I am happy to report, the staff at Leica Australia were enthusiastic, courteous, dedicated, knowledgeable and just plain helpful. At one stage I had 5 different staff emailing me with updates. We all seemed to have a common interest in precision timing and measurement. I now have the data I need plus a whole lot more information I was not aware of before. For instance, a warning was given that some of the antenna heads are sealed with nitrogen so be careful when opening them. Please be mindful if opening a GPS antenna in future? The Leica staff even attempted to find calibration data for my serial number. This was all for a guy that walked in, off the street, The support service is fantastic and I now have great trust in Leica. In future, when I am asked for a recommendation for precision geosystems or timing, I will have no qualms in recommending Leica, based on this great experience. --marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of bg Sent: Tuesday, 16 July 2013 7:38 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage, Good! N is supposed to go to north, yes! But for this antenna it does not matter... longer story below. This is used when you do phase differential stuff. Which usually means L1/L2 stuff and specifically antenna calibration data for az/el. I cannot find any calibration data. http://www.ngs.noaa.gov/ANTCAL/Antennas.jsp?manu=AeroAntenna http://www.geopp.de/index.php?bereich=5kategorie=34artikel=62 However if you look at the AT antennas at NOAA with a spike radome - I think the base chokering is the same as ours. Just a different antenna element in say the AT2775-43. For that antenna it matters! I think the application for the AT575-90 was code differential dgps (marine DGPS) base stations. This service gives the users 1m:ish accuracy. Phase calibration is clearly 10cm and not needed for basic code DGPS. -- Björn Originalmeddelande Från: Mark C. Stephens ma...@non-stop.com.au Datum: 2013-07-15 12:13 (GMT+01:00) Till: Discussion of precise time and frequency measurement time-nuts@febo.com Rubrik: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage, Thank you, It is a AT575-90_G! Now, On the bottom, there is an arrow labelled N. I presume that is supposed to face north? I can't tell you how ideal this antenna is for my application, outstanding! Thank you again. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of b...@lysator.liu.se Sent: Monday, 15 July 2013 7:02 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage, Hi, Is the antenna identical to this? http://www.aeroantenna.com/PDF/AT575-90_G.pdf http://ebookbrowse.com/at575-90-g-pdf-d359926216 (alternate link) Do you have some pictures of the antenna? In particular the antenna element? Aeroantennas of this vintage is usually RG which according to the spec above 5-18VDC. I recall having seen 4.5V as lower level to. Modern antennas are usually good to 3.3 or lower. With vintage antennas this is much more uncertain. -- Björn I have been trying to find a datasheet for my Leica Antenna. All that is marked on the antenna is part number 10147. I want to find out what voltage range the preamp works off. Anybody have any idea? -marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https
Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours.
Azelio, There is a pForth command init_gps Or syst:pon does a warm boot. Syst:pres defaults all settings! For the first time, I waited around and eventually, the phase lock was restored. Actually, since it went through this process the GPS RX is behaving itself better than ever. Perhaps it forced some sort of calibration routine. Previously, I just rebooted the unit to get lock back. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Azelio Boriani Sent: Tuesday, 16 July 2013 5:57 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Advice Z3816A jumping to Holdover: 1PPS TI exceeds hold threshold, then Recovery: phase alignment for 3-4 hours. I have a 58503 that occasionally is not able to track satellites. Usually I wait until the holdover expires but then the only fix seems to restart the 58503 (SYST:PRESET) better than power cycle. It seems there is a command to reset only the GPS receiver but it is not in the 58503 manual. On Tue, Jul 16, 2013 at 6:33 AM, Mark C. Stephens ma...@non-stop.com.au wrote: I have a Z3816A and it periodically jumps into holdover with error message: Holdover: 1PPS TI exceeds hold threshold Then for the next 3-4 hours it gradually adjusts the phase alignment. The error message is Recovery: phase alignment [TI +435.5 us] (when I noticed it had changed, they figure was likely to have been much higher) The TI then gradually decreases, currently it is sitting on: Recovery: phase alignment [TI +129.9 us] I am hoping that I won't have to power cycle the GPSDO to get it locked again. I emailed the seller (Yixun HK) and they are trying to tell me power cycle is only fix. They also claim the cause is due to weather? I explained to Yixun I have a lot of smart clocks here and none have exhibited the same problem ever. This is the 3rd defective Z3816A I have got off Yixun and it is costing me a small fortune to send these back. The first was reporting the 12v Supply was out of tolerance, a quick jump into pForth confirmed the A, B and C 12v supplies were over 12.5v. I ended up sending it back to Yixun. The second I was able to fix myself, apparently someone had changed the OCXO but left the insulating-spacing washers out from the pins of the OCXO. This was causing a short on the EFC. That Z3816A unit and now appears to be running normally except the PU is terrible, I'll run Cal for 24 hours and see if it improves. However, Now the 3rd unit is getting this TI exceeded error. I think I have had enough of shipping things back to these guys - they won't replace anything, including parts, unless you ship back to them first. I would just like to get some informed opinions, could the issue be with: a) Antenna b) GPS Module c) OCXO d) PLL circuit on main board. Many thanks, --marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Lecia L1 GPS chokering antenna voltage,
I have been trying to find a datasheet for my Leica Antenna. All that is marked on the antenna is part number 10147. I want to find out what voltage range the preamp works off. Anybody have any idea? -marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Lecia L1 GPS chokering antenna voltage,
Thank you, It is a AT575-90_G! Now, On the bottom, there is an arrow labelled N. I presume that is supposed to face north? I can't tell you how ideal this antenna is for my application, outstanding! Thank you again. -marki -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of b...@lysator.liu.se Sent: Monday, 15 July 2013 7:02 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Lecia L1 GPS chokering antenna voltage, Hi, Is the antenna identical to this? http://www.aeroantenna.com/PDF/AT575-90_G.pdf http://ebookbrowse.com/at575-90-g-pdf-d359926216 (alternate link) Do you have some pictures of the antenna? In particular the antenna element? Aeroantennas of this vintage is usually RG which according to the spec above 5-18VDC. I recall having seen 4.5V as lower level to. Modern antennas are usually good to 3.3 or lower. With vintage antennas this is much more uncertain. -- Björn I have been trying to find a datasheet for my Leica Antenna. All that is marked on the antenna is part number 10147. I want to find out what voltage range the preamp works off. Anybody have any idea? -marki ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
