[time-nuts] tbolt2lcd Thunderbolt Monitor
A software update of my a small monitor for Trimble Thunderbolt, named tbolt2lcd, is available from: http://www.romahn.info/tbolt2lcd/ It does handle week rollover sins 30-Jul-2017 correctly (I hope). Götz ___ 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 Harmonics
hello to all, to put things right into perspective please note that the famous OCXO hp10811 is "only" specified with harmonics <25 dB (see page 11 of manual https://www.febo.com/pages/hp10811/HP10811AB-Manual.pdf). This device is but still often felt to be useful. Goetz Am 22.01.2017 um 09:21 schrieb Rhys D: Bill, No offence taken at all. On the contrary, I really appreciate a great deal the effort you have gone to straightening out my misconceptions and blunders! This forum is such a great learning opportunity. I usually work with digital systems, so my RF and analog knowledge is sketchy at best. Half the reason I bought a spectrum analyser is to have an excuse to learn a bit about RF in a hands on way. It's funny you mentioned the overly precise numbers. After I wrote them I thought, well that's ridiculous, but I left them as is. That'll teach me! Cheers, Rhys ___ 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] 53132 replacement fan
try this site: http://www.eevblog.com/forum/testgear/replace-fan-on-53131a-counter-with-quieter-version/msg727690/#msg727690 Götz Am 21.11.2016 um 02:43 schrieb Christopher Hoover: I was able to cross it easily to a well-known fan manufacturer's part. If someone doesn't chime in, I'll dig through my notes and get you the details. -christopher. 73 de AI6KG On Sun, Nov 20, 2016 at 11:14 AM, John Ackermann N8UR <j...@febo.com> wrote: Does anyone have a part number for the 53132 fan (or equivalent)? Mine is getting pretty noisy. Thanks! John ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/m ailman/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. -- Götz Romahn ___ 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] TU60-D120-131 Specs....?
may be this zip-file from James Miller helps to set up the Jupiter properly: http://www.jrmiller.demon.co.uk/projects/ministd/jupcom.zip Götz Am 29.06.2016 um 10:45 schrieb Bryan _: Sorry to be so dense on this but doesn't the unit just default to the Jupiter-T command set on power up. I should be able to just enter @@Cj and receive the (manufacturer name, model, serial number and software revision ) shouldn't I? -=Bryan=- From: hol...@hotmail.com To: time-nuts@febo.com Date: Wed, 29 Jun 2016 02:42:50 + Subject: [time-nuts] TU60-D120-131 Specs? "@ @ W b 0x01 cksum 0x0D 0x0A" will switch from Motorola mode to Zodiac mode. The checksum is the XOR of all bytes after the @@ and before the cksum byte. The 0x?? values represent binary bytes. The spaces are for clarity and are not sent. ___ 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. -- Götz Romahn ___ 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] Can someone ID this GPS board ?
Pete, to obtainm more information google for: aisin-seiki gps module Götz Am 02.03.2016 um 22:10 schrieb Pete Lancashire: Another $1 wasted :-) Found a few referneces to it being for automotive use and the GPS module is made by/for JRC. Anyone have a data on the module or the board ? http://petelancashire.com/gallery/main.php?g2_itemId=5606 http://petelancashire.com/gallery/main.php?g2_itemId=5609 -pete ___ 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. -- Götz Romahn ___ 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] Can someone ID this GPS board ?
Pete, some information is available here: http://gps.instanet.net/orig/ regards Götz Am 02.03.2016 um 22:10 schrieb Pete Lancashire: Another $1 wasted :-) Found a few referneces to it being for automotive use and the GPS module is made by/for JRC. Anyone have a data on the module or the board ? http://petelancashire.com/gallery/main.php?g2_itemId=5606 http://petelancashire.com/gallery/main.php?g2_itemId=5609 -pete ___ 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. -- Götz Romahn ___ 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] PRS 10 proble
Bert, moving the controller board does not work, but moving the lamp assy did work here. Am 02.03.2016 um 13:41 schrieb Bert Kehren via time-nuts: We have two PRS 10 units, one with the 1 pps disciplining circuit. Its lamp module failed. Moving the controller board to the one without the 1 pps circuit did not work. Does any one have done the move successfully. 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. cheers Götz Romahn ___ 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] Timestamps in audio files?
there is a timecode associated with Audio CDs. https://en.wikipedia.org/wiki/Compact_Disc_Digital_Audio maybe this helps, Götz Am 21.12.2015 um 22:06 schrieb Hal Murray: tsho...@gmail.com said: I know of many proprietary digital recording applications that make WAV's or MP3's or proprietary codec formats, where the filename includes a timestamp. Much more interested in standard formats where the timestamp is embedded in the file itself. What sort of accuracy to you want? Is nearest second good enough or do you want time-nut level accuracy? One thing to keep in mind is that the recording clock may not be accurate, so if all you know is the start time, your error bars grow as you move down the file. Recording IRIG on another channel is the best suggestion I've seen. -- Götz Romahn ___ 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] PRS10 Rubidium
@Juerg, try swapping the lamp module. This worked with my two PRS10 Goetz Am 22.02.2015 um 16:44 schrieb Jürg Kögel: Fellow time nuts. I have two SRS PRS10 Rb’s that I did purchase 10 years ago. Both have been working for the last nine years. One did fail last year and I finally got around to looking at it in the last two weeks. The attached picture shows the trauma to the lamp board. I do not understand the corrosion since it has been in a very controlled environment in my basement. Since the failed unit does have the 1 pps loop control I moved the processor board to the still working unit. Did not work. Does it take more than just moving that one board to get 1 pps loop control? Second any ideas as to what may have happened to the lamp heater board. Any recommendations? Plan on making a replacement board. Have a power FET MRF134 Thanks Juerg ___ 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 leap second pending (TBolt/Heather)
my monitor ( see http://www.romahn.info/tbolt2lcd/ ) also shows leap sec pending. This info is from Thunderbolt. Götz Am 23.01.2015 um 04:38 schrieb Didier Juges: Re: Note that this is not a GPS problem, nor a Trimble problem. It's just a problem with user written software. I agree with Mark's comment. His software makes no attempt to interpret or correct the information put out by the Thunderbolt, it simply reports it. My Thunderbolt Monitor does the same thing. I can imagine a different tool with a different objective doing something different with good reason, but that is not what Lady Heather does, by choice rather than by mistake. It's a problem with user's expectations :) On Thu, Jan 22, 2015 at 8:05 PM, Mark Sims hol...@hotmail.com wrote: Nope, it's not an error or a problem. That column of data is showing a decode of the 16 status bits that the Tbolt is providing.The Trimble docs say that bit is a Leap Pending bit, so that is what Heather displays. It would be wrong to try and mask/adjust the report of the receiver's status word. Lady Heather is a monitor and display program for Trimble timing receivers. It shows the values that the receiver is reporting (usually to the precision that the receiver provides... think that micro-degree temperature value is really that accurate? I have a lovely bridge that you might want to purchase) But that's what the receiver is sending, so that's what gets displayed. - Note that this is not a GPS problem, nor a Trimble problem. It's just a problem with user written software. ___ 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] 53132A Cooling fan
Loïc, I bought this one http://www.kessler-electronic.de/Luefter/Sunon_DC-Luefter/40x40x20mm/MB40201V2-A99_i1828_40187_0.htm (in Germany of course), the quietest I could find. Götz Am 11.01.2015 um 06:59 schrieb Loïc Moreau: Hi, My 53132A cooling fan is becoming extremely noisy so I have to fix it or find ear plugs fast. If anybody as encountered the same problem witch I suppose is common I will be interested if there is replacement part easily available for that purpose. Regards Loïc ___ 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] KS24361 Ulrich Z83XX software mod works
the latest version will do it for the Z3811 and Z3812 as well. Download here: http://www.romahn.info/lucent/z3811.exe Goetz Am 28.12.2014 um 16:25 schrieb paul swed: I followed fellow time-nut Gotz method of replacing the z3805 with the z3811 in Ulrich's Z3811 program and it works very well. All of the stats seem to be working on the Lucent 24361. I kind of wonder about doing the same for the crystal oscillator as its a Z3812 if there is any usefulness to creating a program for it? Thanks Gotz. Regards Paul WB8TSL ___ 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] Lucent KS-24361 RS-422 interface pinout
Am 02.12.2014 04:29, : Hal, (see below) 4 RX+ 8 RX- Looks good. 5 TX+ 6 TX- I think there is a typo in there. That should be pins 5 and 9. I'm using pins 9, 8, and 7 as per Stewart's message that started this discussion. 3 and 7 ground Pins 1, 2, and 6 seem not-connected. (That's using a scope without a ground clip. I see slight fuzz on pins 3 and 7, nothing on 1, 2 and 6.) The above is on J8, Diagnoistic. J6, RS422/PPS has the same (5, 9) TX pins. If you shift the cable over there it gets a line each second. This can be handy for checking that direction of your setup. Pins 1 and 6 are the PPS pulse. 400 microseconds wide. It's not active on my box that's in STBY. Pins 4 and 8 look like inputs. Does anybody know what you can send in there?Hal, it's already known to us: http://www.mail-archive.com/time-nuts%40febo.com/msg69593.html Götz ___ 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] KS-24361 Output spectrum to 100 MHz
Hendrik, the 10 MHz may not be dirty. The spectrum you show is that of a 10 MHz rectangular wave and that's what on the output from the 10 MHz connector, just a (may be clean) TTL-level signal, nothing fancy. Götz Am 02.12.2014 07:57, : Hi List, here is my example spectrum taken with a Rigol 815, due to inpatience only up to 100 MHz. (I don't know if this was posted yet, but still then it would be a 2nd, 3rd example.) This shows what is meant by clean 15, dirty 10 MHz. I always use insane pre-attenuation as every beginner should do. But even a dirty 10 MHz can be good, e.g. for driving comb generators =) Hendrik ___ 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] Fwd: Re: Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
hello Alex, my MV89 is also labeled MV89A XO00281M. So I think it should work. 73 Götz Am 30.11.2014 20:20, : Hi Goetz I built DIY one with a PCB from Gerry using my Morion MV89 OCXO and it is working fine. Fully compatible with hp53131 calibration procedure. Götz I have the Morion MV89A XO00281M-CT-MV89, would it work with that board also? 73 KJ6UHN Alex Original Message Subject:Re: [time-nuts] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator. Date: Sun, 30 Nov 2014 17:08:33 +0100 From: Götz Romahn go...@g-romahn.de Reply-To: Discussion of precise time and frequency measurement time-nuts@febo.com To: Discussion of precise time and frequency measurement time-nuts@febo.com Adrian, if you do not insist on a hp10811A, have a look at Gerrys site http://gerrysweeney.com/update-diy-hpagilent-53131a-010-high-stability-timebase-option-pcbs-available/ You can buy an assembled option 10 compatible OCXO modul for less than 100 GBP. I built DIY one with a PCB from Gerry using my Morion MV89 OCXO and it is working fine. Fully compatible with hp53131 calibration procedure. Götz ___ 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] Lucent 24361 15 Mhz
15 MHz is available from J9 on the board (near J8) continuously and is switched by U30 ( DG419 analog switch ) from pin 8 to pin 1 if stable locked and from there is fed to the 15 MHz output (J4 on front panel) via some amplifiers. Pin 1 is switched to pin 2 ( GND) if unlocked. Götz. Am 01.12.2014 03:01, : Just started to trace out the 15 Mhz signal internal to the ref1. Top of board side near oven and rs422 connector are the power amplifiers and output on off control for the 15 Mhz. The signal comes from the bottom of the board. J8 is 5 Mhz. So will need to take the board out to trace further. Not looking forward to that task. Regards Paul WB8TSL ___ 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] Lucent KS-24361 15 Mhz and 10 Mhz
@ Paul yes pin 1 of U206 is the input of a schmitt-trigger ( xxACT14 ) where the rectangular 10 MHz output on the Ref-0 Modul is generated. @ David 10 MHz is not available on the Ref-1 module, the one with antenna input (yea, but it is still at pin 1 of U206). Götz Am 01.12.2014 04:09, : OK so it was not as hard as I thought getting all of teh screws out. The harder part is getting the actual board to slip out of the back. After getting to the bottom I found a locked 10 Mhz signal on U206 pin 1 somewhat of a sine wave but compressed top and bottom at 5 V and pin 2 a squared up version. Pin 1 goes off to several transistors. Also I have not looked at the rest of u206. So good or bad a tracking 10 Mhz exists. Not so easy to get to frankly. Regards Paul WB8TSL ___ 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] Fwd: Re: Lucent KS-24361
hello Tom, thank you for your kind response. All voltage levels are fine and I have 5MHz as well as 15MHz on the board. DC levels at transistors I testet were not suspicious. I have no idea where how the 10MHz is generated. I do not see any doubler active but see a tripler at 15MHz. May be the community can explain my error listings especially the OSC_DEL, error code: 01H. OCXO has good output and heater seems to be ok as well as EFC. cheers Götz Am 30.11.2014 05:59, : Hello Götz, I think I saw the 10 MHz on several points. At least one of the nearby transistors also showed some signal. I have another project on the bench right now but when it is done, I'll throw the ref-1 back on the bench and make some notes. Do you have the 15 MHz and is the 5 MHz oscillator running? How about the supply voltages? They are marked and have test points. Also, you could make some DC measurements on the two transistors as they are standard SMT devices. Sure wish someone would shake a schematic out of the woods. Best regards, Tom Miller, Forest Hill, Maryland WA3PZI - Original Message - From: Götz Romahn go...@g-romahn.de To: tmiller11...@verizon.net Sent: Friday, November 28, 2014 12:23 PM Subject: Re: [time-nuts] Lucent KS-24361 hi Tom, from your postings at [time nuts] I've read, that you have found several locations with 10 MHz signal on the backside of the REF-1/REF-0 boards. My problem is, my REF-1 has run into fault mode and the 10 MHz at the collector of Q208 is missing now. It was there before the failure occurred. Retracing the PCB connections for the source of the 10 MHz is not so easy with no active signal. It would be very helpful if you could provide some more positions where I should see the 10 MHz as this could help help finding the reason of the failure. :diag:log:read:all? gives scpi Log status: 10 entries Log 001:20141120.00:02:37: Log cleared Log 002:20141120.00:00:00: Power on Log 003:20141120.00:00:00: FAIL: OSC_DEL, error code: 01H Log 004:20141120.00:00:01: FAIL: FPGA, error code: 01H Log 005:20141120.00:00:01: FAIL: INT_REF, error code: 01H Log 006:20141120.00:00:01: Self-test failed Log 007:20141120.00:00:01: Failed mode entered Log 008:20141120.00:00:01: Antenna fault set Log 009:20141120.00:00:02: 1PPS output failure set Log 010:20141120.00:00:02: Power settings ok, Int: 17 dBm, Ext: 17 dBm thanks in advance for your efforts and have a good time at thanksgiving Goetz (Berlin, Germany) ___ 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] Upgrade an HP 5342A microwave frequency counter to have an oven oscillator.
Adrian, if you do not insist on a hp10811A, have a look at Gerrys site http://gerrysweeney.com/update-diy-hpagilent-53131a-010-high-stability-timebase-option-pcbs-available/ You can buy an assembled option 10 compatible OCXO modul for less than 100 GBP. I built DIY one with a PCB from Gerry using my Morion MV89 OCXO and it is working fine. Fully compatible with hp53131 calibration procedure. Götz Am 29.11.2014 22:19, : Is the upgrade similarly easy on a 53131A ? I realise that it needs to have an additional controller pcb but I have one of these counters fitted with option 001. The pcb holding the oscillator has an edge connector that looks suitable for a 10811A, and I have one to hand as well as a couple of compatible oscillators. I think I would need to remove the existing TCXO module - I haven't investigated too carefully yet but I think it's soldered in, and obstructs the mounting of the 10811A. On Sat, Nov 29, 2014 at 5:20 PM, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: On 27 November 2014 at 22:38, Dr. David Kirkby (Kirkby Microwave Ltd) drkir...@kirkbymicrowave.co.uk wrote: The HP 5342A has an optional oven oscillator. I just bought one of those counters, but mine has a TCXO and is about 50 kHz off at 10 GHz. I'm sure I can trim it closer than that, but if possible I'd like to stick an oven oscillator in it. Does anyone know what is involved? I have at least one 10811A oscillator here that I could stick inside, but does it need any more, or just the oscillator? Someone said the oscillator should be an 10544-60011, but a 10811A is backwards compatible. Dave It was very easy to fit the 10811A oven (HP 10811-60111) and get the oven working, although the oven is not powered when the counter is not switched on, even if there is power at the AC mains input. I can live with that. In fact, I prefer it to be honest. The procedure was 1) Remove top and bottom covers, which means the two front feet, plus 4 rear feet/protectors need to be removed. 2) Undo one screw at the top that held a board with a TCXO on it. The board plugs into a 15-pin edge connector. 3) Pull out the board (HP P/N 05341-60047) with the TCXO. The TCXO on the board is a marked DALE, TCXO-22-1, 0960-0394, 10.0MHz, SET 1.0Hz. (normally I would put a space between a number and the units, but I've written what is actually on the TCXO). 4) Attempt to insert the 10811A oscillator. This failed, as there were some wires around the optional board for GPIB which were restricting the space too much. So I had to cut a wire tie, and move the wires out the way. 5) Fitted 10811A at the top. 6) Invert the counter, and screw in the two screws which secure the 10811A to the chassis. For this I needed to temporarily move a ribbon cable, as the screw was below it. 7) Powered it up, and it worked. It shows OVN in the right of the LED display. Once that went out, it still took a minute or two for the readings to become pretty stable, although no doubt it will take months to become as good as it will get. I've not adjusted it yet, as I don't have any accurate frequency reference. But whilst the actual frequency indicated on the counter is different from what my signal generators are supposed to be producing, the last few digits (100, 10 and 1 Hz), are not all jumping around when seeing 10 GHz. The frequency indicated on the counter when connected to two different signal generators, which both have ovens of unknown type, are: 1) HP 83623A 20 GHz sweeper set to 10.0 GHz, fed into high frequency input of the frequency counter. HP 5342A counter indicates 10,000,000,690 Hz (relative difference = +6.9 10^-8) 2) HP 8656A set to 100 MHz, HP 5342A counter indicates 99,999,987 Hz (relative difference = -1.3 x 10^-7) With the old TCXO in the frequency counter, the indicated frequency of the 10 GHz signal was about 48 kHz off, but it moved around a KHz or so. In contrast, now the oven is installed, the reading is a *lot* more stable, with it shifted about 15 Hz. I don't currently know the absolute accurate any of the references in the test equipment are, but certainly the readings are a lot more stable after fitting the oven. I will need to get a GPSDO before adjusting any, but if nothing else, the short term stability of the oven is clearly superior to the TCXO. Long term should be too, but I can't determine that from what I have. 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 mailing list -- time-nuts@febo.com To unsubscribe, go to
Re: [time-nuts] Fwd: Re: Lucent KS-24361
thanks for your suggestion. No chips are socketed. I'll continue searching. Götz Am 30.11.2014 17:31, : Hi I suspect the key to your issues are the FPGA error codes. It’s likely that a lot of the “work” is done in the FPGA. If it is not setting up properly, you will get all sorts of problems. Try: 1) Unplug the memory chips and plug them back in. Sockets can have issues … 2) Look for tin whiskers around the FPGA pins. Sometimes a good scrub with a toothbrush is quicker than looking. 3) There has to be a clock signal into the FPGA. It may be the 5 /10 /15 MHz, it may be something else. Run around the “good” unit with a scope and then do the same on the bad one. If the box is still inside the 30 day warranty - send it back. Even if it isn’t, contact the seller. Bob On Nov 30, 2014, at 10:50 AM, Götz Romahn go...@g-romahn.de wrote: hello Tom, thank you for your kind response. All voltage levels are fine and I have 5MHz as well as 15MHz on the board. DC levels at transistors I testet were not suspicious. I have no idea where how the 10MHz is generated. I do not see any doubler active but see a tripler at 15MHz. May be the community can explain my error listings especially the OSC_DEL, error code: 01H. OCXO has good output and heater seems to be ok as well as EFC. cheers Götz Am 30.11.2014 05:59, : Hello Götz, I think I saw the 10 MHz on several points. At least one of the nearby transistors also showed some signal. I have another project on the bench right now but when it is done, I'll throw the ref-1 back on the bench and make some notes. Do you have the 15 MHz and is the 5 MHz oscillator running? How about the supply voltages? They are marked and have test points. Also, you could make some DC measurements on the two transistors as they are standard SMT devices. Sure wish someone would shake a schematic out of the woods. Best regards, Tom Miller, Forest Hill, Maryland WA3PZI - Original Message - From: Götz Romahn go...@g-romahn.de To: tmiller11...@verizon.net Sent: Friday, November 28, 2014 12:23 PM Subject: Re: [time-nuts] Lucent KS-24361 hi Tom, from your postings at [time nuts] I've read, that you have found several locations with 10 MHz signal on the backside of the REF-1/REF-0 boards. My problem is, my REF-1 has run into fault mode and the 10 MHz at the collector of Q208 is missing now. It was there before the failure occurred. Retracing the PCB connections for the source of the 10 MHz is not so easy with no active signal. It would be very helpful if you could provide some more positions where I should see the 10 MHz as this could help help finding the reason of the failure. :diag:log:read:all? gives scpi Log status: 10 entries Log 001:20141120.00:02:37: Log cleared Log 002:20141120.00:00:00: Power on Log 003:20141120.00:00:00: FAIL: OSC_DEL, error code: 01H Log 004:20141120.00:00:01: FAIL: FPGA, error code: 01H Log 005:20141120.00:00:01: FAIL: INT_REF, error code: 01H Log 006:20141120.00:00:01: Self-test failed Log 007:20141120.00:00:01: Failed mode entered Log 008:20141120.00:00:01: Antenna fault set Log 009:20141120.00:00:02: 1PPS output failure set Log 010:20141120.00:00:02: Power settings ok, Int: 17 dBm, Ext: 17 dBm thanks in advance for your efforts and have a good time at thanksgiving Goetz (Berlin, Germany) ___ 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] Si570 question
Jim, thre is some info at: http://www.box73.de/product_info.php?products_id=1869 it's all in German. If you can read that, goto Zusaztinformationen (additional informations) where you will find a comprehensive articel (pdf-document) also in German language (no I have not played with it). enjoy Götz Am 18.11.2014 16:59, : I'm sure someone here has fooled with the Si570. I just got a few of them (CMOS output), and am about to deadbug one of them to fool with it (unless there's some convenient protoboard out there available.. I didn't look too long and hard, but some casual googling didn't find one). Looking at AN334 from SiLabs: It looks like you just need a 10nF bypass on the Vcc, a pull down on the OE (1k), 1k pullups to 3.3V on SDA/SCL (which is going to be driven by a 3.3V teensy 3.0/3.1 microcontroller) 150 ohm loads to ground, followed by a 0.1 uF DC block? I'm going to be running it at less than 50 MHz (although the parts I got are preset to 100 MHz) Any traps for the unwary? ___ 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] Lucent KS-24361 J6 connector
read this on: http://www.realhamradio.com/gps-satstat-software.htm When you first turn on the Z3816A GPS receiver, it is always continuously sending time. There are two commands you need to use: one to put it into the SCPI command mode, the other to switch it back to sending time. The two commands are: To go to the SCPI mode: ptim:tcod:cont 0 To go to the continuous time mode: ptim:tcod:cont 1 this holds true also on the J6 (RS422/1PPS) connector of the Lucent KS-24361 Z3811 and maybe Z3812 ( watchout there is no !! echo if you are using a terminal software but Z3811.exe works fine). cheers Götz ___ 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] Lucent KS-24361 GPSDO arrived today several questions
why don't you just look at the D_Sub connectors. Pins and sockets are consistently numbered. I do see these numbers even on the J5 interface connector of my RFTG-1. If needed take a magnifying glass. Götz Am 08.11.2014 16:56, : Even though Bob says it I also screwed up the 15 pin mini. To be very clear Viewed from the chassis front. Male plugs pin 1 left side Female plugs pin 1 right side But that said the systems running fine now by simply doing the pin 2 and 3 approach. Next things. Battery backup to the GPS unit then RS422 and communications. My unit took a solid 2.5 hours to lock etc. But I was not on the good antenna. Instead an inside unit on the bench. Far from optimum. I just did not want to screw with the antenna connector and the L + 220 ohm R to fake out the GPS unit. Thanks for the help every one. Regards Paul WB8TSL On Fri, Nov 7, 2014 at 9:14 PM, Bob Camp kb...@n1k.org wrote: Hi The reason it was listed as #1 on the list is that I made the backwards numbering mistake when I was trying to work out the resistances on the interface connector. I’ve been doing this for 40 years and I still mess it up on a regular basis. We also seem to get it wrong from time to time when we lay out connector connections on pc boards, but that’s another story altogether ….. Bob On Nov 7, 2014, at 9:09 PM, Alan Hochhalter alanh...@gmail.com wrote: I got in a hurry and made mistake #1 listed by Bob a few replies back. I hooked one up to the RS422/1PPI port transmit pins (same as on J8) and was receiving data fine in the PC so I just hooked up the other pair of terminals to the receive pins for J8 and couldn't get any response to commands. I finally found that I had initially connected the Lucent box ouput pins to the wrong terminals on the converter. The Time code data on J6 was still getting into the PC even though it was connected wrong. So I just wired the Lucent box input pins to the other pins on the converter that are really inputs and couldn't get J8 sto work either. What I ended up with to make it work is: J8-9 to RX-, J8-5 to RX+, J8-8 to TX- and T8-4 to TX+. Alan ___ 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] Lucent KS-24361 GPSDO arrived today several questions
if you want to go the easy way to talk to REF-1 of REF-0 via the J8-Diagnostic port try Ulrich Bangerts Z38XX software. Here: http://www.romahn.info/lucent/z3811.exe you will find for download a patched and renamed version that directly recognizes our nice new toys. After setting the right Parameters try View or Manual Command Entry. cheers Götz Am 07.11.2014 13:07, : Hi When Satstat does the change, I’m sure it uses the correct command to do it. The syntax is a phrase followed by a numeric. You then use the same phrase followed by a question mark to see if it took it. The slave happy accepts the command, stores the data, and returns it when asked. A reasonable external program would indeed say “yup it did it”. With no serial com (that’s a guess not a proven) there is no way to change the GPS. The slave simply stores the data. The only alternative would be for it to reject virtually all commands over the Diag port. Much easier to just put a note in the manual than to disable all that code. Bob On Nov 7, 2014, at 12:02 AM, Bob Stewart b...@evoria.net wrote: Hi Bob, I've been using the Satstat program to send commands. What I don't understand is why the slave will accept commands such as sat elevation angle and not give an error response. It gives a response of command complete, but it doesn't change it. Or is that an indication that both units use the same firmware, and success is actually indicated by the resulting change of the angle? Bob From: Bob Camp kb...@n1k.org To: gandal...@aol.com; Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Thursday, November 6, 2014 6:07 PM Subject: Re: [time-nuts] Lucent KS-24361 GPSDO arrived today several questions Hi Ok, I got to spend a little quality time with my pair today. I mostly poked at the Diag port with a terminal program. Both of the units seem talk over the Diag port regardless of the mode they are in (master / slave / fault ). Both respond to a sub-set of the Z3801 SCPI commands (= not all commands work). There are a few enhancements where a query to a “node” gives a reply (which it should not if it’s “node only”). All of it works ok at 9600 baud 8N1. All of it comes back with an error message (E-xxx) after a valid command response. It may not like the terminal program sending cr/lf or something like that. By far the most useful thing to type is :SYST:STAT? That executes the system:status request and gives you a nice full screen of information. It shows you about 95% of the useful information all on one page. About the only major thing missing is the DAC value. That’s available with another command out of the Z3801 list. It does take a while to compose and transmit the screen, so it’s not the best way to to this forever and ever. The data from the request is the same on both boxes. Same everything except one shows as standby etc. The interesting details are things like elevation mask and cable delay. Why interesting? You can set them with discrete commands. You can also query the data with the same commands to make sure the box “took” what you sent. This allows experimentation with changing the elevation mask on each box (or just simply doing a discrete query for the mask on each box). The Ref-0 / slave will happily change things around with discrete commands. None of them are reflected in the :SYST:STAT? listing on the Ref-0 or Ref-1. When you look at the Ref-1 / gps box, it’s discrete query information matches the :SYST:STAT? screen on both boxes. When you change things on the Ref-1 box both screens follow that data. — When you pull the antenna on the gps box, it immediately (almost) goes into gps fault led flashing mode. The slave box happily sits there for a while (say a minute) with it’s gps led saying all is well. When you plug the antenna back in, the process is reversed. The gps box goes out of flash mode right away. The led goes out in a bit. The led on the slave box does not follow for a minute or so. — All of this suggests to me that the Ref-0 / slave does not talk back to the other box via serial. It also suggests to me that all it “sees” from the Ref-1/gps box are the duplicates of the serial string out of the Motorola gps module. The Ref-0 just figures out what’s happening by watching those strings as they roll by. Hope that makes sense…. —— If that’s all true, it should be “easy” to put dummy gps sentences into the Ref-0 interface port and a pps from something else. Once it sees stuff that it likes, it will start locking up to that pps. Cheap micro and just about any modern gps = fancy new GPSDO. Quick / easy / not much work. A little more complex if you decide to translate sawtooth data. That of course assumes these boxes do anything with sawtooth ... Bob On Nov 6, 2014, at 7:52 AM, GandalfG8--- via time-nuts time-nuts@febo.com wrote: Hi Bob I view the master/slave situation the same way you do, but only
Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system
J5 (interconnect) pins are routed to the kathode of smd-ics labeled Z2upperindex3. These look like z-diodes to protect further circuitry from transients. The following pins are routed this way: 1,2,3,4,9,10,11,12,14,15 cheers Götz Am 04.11.2014 13:43, : Hi Ok so the correct pairs should be: A 1 15 B 2 14 C 3 13 D 4 12 E 5 11 F 6 10 G 7 11 ground 8 8 Bob On Nov 4, 2014, at 4:38 AM, Stewart Cobb stewart.c...@gmail.com wrote: A wiring diagram of the Z3809A cable interconnect cable was published earlier on this list. That information appears to be incorrect. The cable is actually wired pin 1 to pin 15, pin 2 to pin 14, etc. Another way to describe it is that for each wire in the cable, the pin numbers on each end of the cable add up to 16. A mated pair of these units is running in my lab with a scratch-built interconnect cable following the above rules. This scratch-built cable allowed access to the interconnect signals while the system was operating happily. No lights were lit except the green ON light on the Ref-0 unit (Z3812A, no GPS) and the yellow STBY light on the Ref-1 unit (Z3911A with GPS receiver). The following signals were observed on the interconnect (pin numbers given for the J5 interconnect socket on the Ref-1 unit): Pin 1: 9600 baud serial data (described below) Pin 2: logic low (0.11V) Pin 3: Ground (0.00V) Presence detect? (see below) Pin 4: logic high (4.79V) Pin 5: inverted Motorola PPS, high (5V) for 800ms, low for 200ms Pin 6: 17 / 23 dBm signal from Ref-0 unit (see below) Pin 7: logic high (4.48V) Pin 8: Ground (0.00V) Pin 9: logic low (0.11V) Pin 10: 17 / 23 dBm signal from Ref-1 unit (see below) Pin 11: inverted PPS, low 400us, high (5V) otherwise Pin 12: logic low (0.12V) Pin 13: Ground (0.00V) Pin 14: logic low (0.08V) Pin 15: logic high (4.78V) Pins 3, 8, and 13 appear to be firmly connected to Ground. (Note that these are the three pins which are clipped short on the HP interconnect cable.) On an unpowered, disconnected box (either Ref-0 or Ref-1), pins 8 and 13 are connected to Ground (low resistance) and pin 3 is high impedance. Presumably pin 3 on each box (connected to the grounded pin 13 on the other box) is used to sense the presence of the other box and/or the interconnect cable. The timing of the PPS signal on pin 11 matches precisely the timing of the PPS signal available on pins 1 and 6 of J6 (RS422/PPS) on the active Ref-0 unit. Presumably this signal is coming across the cable from the Ref-0 unit. Note: when the system is coming up from a cold start, SatStat on the unit with the GPS receiver (Ref-1) will show [Ext 1PPS valid] in the space where it shows [GPS 1PPS valid] after the survey is complete. It appears that the Ref-1 unit timing system is locking its oscillator to the PPS coming from the Ref-0 unit during this time. The timing of the PPS signal on pin 5 matches the timing of the PPS output described in the Motorola OnCore manual. Presumably this signal is sourced by the Ref-1 unit to allow the Ref-0 unit to lock to GPS. The edges of this PPS signal look very dirty compared to the signal on pin 11. This may be an artifact of the homemade cable used for this experiment. The HP cable clearly has an overall shield (visible through the cable sheath) and may have internal coax or twisted pair for these PPS signals. When pin 5 and pin 11 are observed together, the usual GPS sawtooth pattern is evident. Someone discovered earlier that the both units will blink their green ON lights if the front-panel switch on either unit is set to 23 dBm vice the normal 17. Obviously each unit can communicate its switch status to the other unit. They use pins 6 and 10 to do that. Pin 10 (on the Ref-1 unit) is high (~5V) if the switch on the Ref-1 unit is in the 17 dBm position, and low in the 23 dBm position. Pin 6 (on the Ref-1 unit) gives the same indications for the switch on the Ref-0 unit. The serial data on pin 1 is transmitted at 9600 baud, with a burst of data every second. The signal idles at logic low (near 0V) and rises to logic high (near 5V) during the burst. This may be the standard for TTL (not RS-232) transmission of serial data, or it may be inverted. The first few characters of one burst were hand-decoded from a scope trace as 0x40, 0x40, 0x45, 0x61, 0x0B, or ASCII @@Ea. This appears to be the Motorola Oncore binary data format, although Ea does not appear to be a valid Motorola command or response. Perhaps the hand-decoding was in error. One can use SatStat, talking to the Ref-0 (non-GPS) box, to issue queries and commands to the GPS receiver. The results are inconsistent, but it seems that at least some of the queries get through and trigger responses. If the Ref-0 box is actually talking to the GPS receiver, it must be doing so through the
Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system
Am 29.10.2014 04:41, : Until you have the two units tied together and GPS ok and the Fault light out, you won't see the 15 MHz signal. You should see a 5 volt pp square wave of sorts coming out of the 10 MHz port. I found a clean 10 MHz signal on the collector of Q208 and several other points. These are on the back side of the board, near the 15 MHz connector. I am trying to find out how they triple the 5 MHz to get 15 MHz. Maybe it can be changed to just double to 10 MHz. There are a few inductors on the board and that may make for a filter. I don't yet have a computer connected. Does the SatStat program run under windows? Regards, Tom Output from Q208 in 10MHz a sinusoid signal. This is fed to pin 1 of U206, a 74xxx14-type schmitt-trigger. This shapes the output to rectangular TTL level. The duty cycle of the 10MHz TTL signal is determined by the trigger level of the 74act14 and may vary for different specimens of REF0 or REF1. Mine is nearly perfect 1:1. Götz ___ 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] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z381...
The Alarm connector J3 is connected as follows: pin 1 goes to pin 6 of U208 pin 2 goes to pin 5 of U208 pin 3 goes to pin 6 of U207 pin 3 goes to pin 5 of U207 U208 (and eventually U207) are labeled 207a. This leads to IL207 from Siemens which is an optocoupler. Pin6 of this is collector and pin 5 is emitter. Pins 1 and 2 are laser diodes. All other pins of J3 look nc. cheers Götz ___ 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] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...
So that's it folks, after all this it would now seem that all that's needed to enable a Ref-1 unit stand alone is to link together J5 pins 2, 10, 12, and 15, and to ground pin 3 to pin 8, and then just hang around for hours and hours on end with yer fingers crossed:-) I don't know if it's possible to monitor the J8 Diagnostic port whilst waiting for it come live, that would at least give a better idea of what's going on, but I deliberately avoided any other connections whilst trying this out so it's possible that might be inhibited also. Anyway, apologies for all the waffle, I've been topping this up as I go along whilst surviving on coffee and getting a bit groggy in the process, it's 0730 here now and no sleep yet, but once I'd had my first encouraging results there was no way I could just go to bed and leave it:-) Regards Nigel GM8PZR I connected pin 4 also to ground permantly without observing any negative sideeffects. SDo no active electrics needed but you will (want ?!) not see STBY led blinking. Götz ___ 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] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...
Am 02.11.2014 15:08, : Ooh err, whoops, and oh dear !! Arthur, I've only just had a chance to look at your latest photos, and unless I've really got my wires crossed, if you'll pardon the expression:-), your links on J5 are not shown on pins 2, 10, 12, and 15, but on pins 4, 6, 11, and 13. As far as I'm aware the numbering from the front of that connector as shown starts in the top right hand corner and every row is numbered right to left. That's certainly how mine are numbered anyway, and I wired them accordingly, and it worked, so where the heck does that leave us now?:-) -- thanks Nigel for detecting this glitch. I removed all jumpers now and tested some reasonable new/old combinations resulting in very simple scheme: it seems to be sufficient to connect pin2 and pin3 to pin8 (ground). Numbering as provided by Nigel and markings on my 15 pin-plug. Götz ___ 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] Lucent KS-24361 GPS and Performance
here you are: COPYRIGHT 1991-1997 MOTOROLA INC.,SFTW P/N # 98-P36848P ,SOFTWARE VER # 2 ,SOFTWARE REV # 2 ,SOFTWARE DATE APR 24 1998,MODEL #R5122U1152 ,HWDR P/N # 5 ,SERIAL # R08FG1 ,MANUFACTUR DATE 0E05 , Götz Am 02.11.2014 14:55, : I am curious about which GPS and rev is used in these units. Could someone post the response from :DIAG:IDEN:GPS? from one of these units? Also, I'm curious if anyone has a Z38XX plot for one of these devices that has been in operation for greater than 48 hours, I'm particuarly interested in the plot of the PPS TI EFC chart as well as the plot of the holdover uncertainty for a period of (say) 2880 minutes or longer to see how this unit compares to my Z3816a. If someone does and could post it, I'd be much obliged cheers Ed ___ 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] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system
Just a hint: I tried successfully Ulrichs Z38XX software (http://www.ulrich-bangert.de/html/downloads.html) in Windows7-32. At least the Manual Command Entry and the Debug Window should work. regards Götz Am 29.10.2014 23:55, : Hi One thing that might help others who are having issues with these units: Which pins did power go to? Which pins do you see RX (and maybe TX) data on? Which cables went where (and their pinout) to interconnect this or that? What software are you using? Yes, One could make some pretty quick guesses at most of this. It’s often a quick guess gone wrong that messes people up … 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.
Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system
and here comes another trick: Ulrich's Z38XX can be persuaded to accept the Z3811 instead of an Z3805. For this to happen search with an Hex-editor in Z38XX twice for the string z3805 and replace this z3805 with z3811, save the changes and enjoy the various Views Ulrich provided. Götz Am 30.10.2014 18:13, : Just a hint: I tried successfully Ulrichs Z38XX software (http://www.ulrich-bangert.de/html/downloads.html) in Windows7-32. At least the Manual Command Entry and the Debug Window should work. regards Götz Am 29.10.2014 23:55, : Hi One thing that might help others who are having issues with these units: Which pins did power go to? Which pins do you see RX (and maybe TX) data on? Which cables went where (and their pinout) to interconnect this or that? What software are you using? Yes, One could make some pretty quick guesses at most of this. It’s often a quick guess gone wrong that messes people up … 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] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system
I also tried Steward Cobbs RS422 - Rs232 hack but with no joy in the beginning. First I had used the standard RS232 com1 port of my computer with no success. Later I tried my Prolific USB-to Serial adapter and things got better. After some measurments and looking at the pinout of the RS422/1PPS connector I've found somewhere on the Net, I made some additions to Stewards hack at the RS422 male plug: connect pin3 (Ground) to pin4 (Rx+) and add an 150 resistor from pin 3 to pin 5 (Tx+). This works reliable to the the Prolific but not reliable with the standard com1 port. The reason seems to be that the Tx- (pin 9) voltage swing re Ground is only abt. 3.5 V. This could explain the mixed success of other members. hope this helps Götz btw: will the RFTG-REF1 unit I have work standalone? I still have the STBY-led blinking after more than 24 hours and 3 to 8 satellites in view, all other leds off. Am 30.10.2014 01:11, : HI There are a few possible variations: 1) Different power supply voltages 2) Cheating RS-232 versus a proper RS-422 converter 3) The “right” interface cable (what ever it’s pinout is) versus a VGA cable ( or no cable at all…) 4) The HP interface versus the Lucent one 5) Windows 3.11 versus Windows 10 beta (or maybe something in-between). I’m only observing that some have had more luck with these than others. Since they are all NOS, they should all work. That suggests one or another hookup issue. I don’t think there is any need for ultra long detail lists. Stu took care a lot of that. I don’t have one, so at this point I’m just an observer on the sidelines. Bob Most time-nuts want to see more than a pretty green light. The old RFTG series allowed you to hook up a PC to the RS422/PPS port and peek under the hood with a diagnostic program. The program is available on the KO4BB website. It is written for an old version of Windows, and I had no luck getting it to run under Windows 7. It does run under WINE (the Windows emulator for Linux) on Ubuntu 12.04 LTS. To use it, you need to make an adapter cable to connect the oddball RS-422 pinout to a conventional PC RS-232 pinout. The adapter cable looks like this: RFTG PC DE-9P DE-9S 7 -- 5 8 -- 3 9 -- 2 (According to the official specs, this is cheating, because you're connecting the negative side of the differential RS-422 signals to the RS-232, and ignoring the positive side of the differential signals. However, it's a standard hack, and it's worked every time I've tried it.) ___ 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] Fwd: Re: Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812...
when comparing bottom sides of ref0 and ref1 boards IC U207 near antenna input of ref1 seems to be missing. Goetz Original-Nachricht Betreff: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812... Datum: Sun, 26 Oct 2014 22:24:29 + Von: Anthony Roby ar...@antamy.com Antwort an: Discussion of precise time and frequency measurement time-nuts@febo.com An: Discussion of precise time and frequency measurement time-nuts@febo.com Hal - there's nothing coming out of those connectors. I'll explore again once I can get my GPS connected to the unit and see if that changes anything. -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray Sent: Sunday, October 26, 2014 4:11 PM To: Bob Stewart; Discussion of precise time and frequency measurement Cc: hmur...@megapathdsl.net Subject: Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812... b...@evoria.net said: Thanks for more pics. Was there any indication of where the 10MHz gets its signal? Could you see a trace, or did I miss that in the pics? I'm a bit too ham-fisted to go prodding around in mine, so I've left it closed after an initial urge to see the top of the board. If you look carefully at the pictures showing the bottom of the connector area on the 10 MHz and Antenna connectors you can see that the connectors don't share any mounting/connecting holes on the PCB. If you want 10 MHz out of the unit with the GPS module, you can get it from the center pin of the unused connector. (You may have to add other parts to get 10 MHz over there.) An alternative migh be to move the antenna connector on the GPS module from the bottom to the top, then use a pigtail lead to the panel. That may not work. From the pictures, it looks like power to the antenna is added to the trace on the bottom of the board. -- 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] jupiter-t tu60-d120 (maybe d125), pinguino and GPSDO
helloMichael, since I own 2 Jupiter TU60 I am interested in your PCP/Schematics and ofcourse the software packet. Please tell me the appropriate conditions. tnx Götz DL7AOT Am 20.05.2014 20:16, : Hi Bret I did a design some years ago with the TU30/TU60/TU120 used as GPSDO for the OZ7IGY beacon project, I have a software packet and instructions to turn the Motorola output to NMEA I can email you. If you chose to go on with the TUxx GPSDO I can supply you with a PCB. OZ7IGY Project info: http://rudius.net/oz2m/ngnb/index.htm Regards Michael, OZ2ELA ___ 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] OT - Need a German speaker
hi, I am living in Berlin, Germany. http://www.box73.de/ do provide a really reliable service. Give me a note if you need help. Götz ___ 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] TSIP protocol for T-Bolt
hi Alex, thanks for writing in German (vielen Dank). Tom made all the manuals available now, so you can fetch them here: http://www.leapsecond.com/pages/tbolt/manual.htm herzliche Grüße Götz PS:Ich bin ebenfalls Elektroingenieur im Ruhestand. (i am also an electronics engineer, retired now) Am 26.03.2014 18:43, : Hallo Götz, ich bin kein time nut, aber ich bin ein Frequency nut, und einer, nach Amerika verschollene deutsche Elektroingenieur in Ruhestand und Funkamateur KJ6UHN, und icgh habe den Thunderbolt, die Hardware, und deswegen moechte Sie hoeflichst fragen diese i've found 3 pdf Thunderbolt-Manuals identified as: -V3 from 2000 -V3 from 2003 and -V1 from 2012 zu zuschicken mit besten Dank im Voraus 73 KJ6UHN Alex On 3/26/2014 9:13 AM, Götz Romahn wrote: hi all, as is my commentent to /tvb's question. Hope it helps, Götz Tom, i've found 3 pdf Thunderbolt-Manuals identified as: -V3 from 2000 -V3 from 2003 and -V1 from 2012 Differences are in the Report Packet 0x8F-AC Data Format pp A62,A62 and 81. If you compare, there are differences among Byte 1 (Receiver Mode) Bits 5 and6, Byte 13 (Disciplining Activity) Bits 8 and 9 Bytes 8,9 (Critical Alarms) Bits 1,2,3 Bytes 10,11 (Minor Alarms) Bits 9 and 11 (and yes, Bit 11 is set from my Tbolt (Firmware V3.00) if I remember correctly). Use of Bit 10 (EEPROM invalid) is not decribed. I have not it tested though :-) A rather reliable reference are Messages from Thunderbolt Monitor V2.60. regards Götz Am 26.03.2014 15:05, : but beware, no single document related to Thunderbolt from Trimbles website is complete nor fully correct. Can you give me an example of some TBolt command that is not in the TBolt document? As a reference you may use my code of a simple Tbolt-Monitor you will here: http://www.romahn.info/tbolt2lcd/ regards Götz Nice. Thanks for posting that. Thanks, /tvb ___ 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] TSIP protocol for T-Bolt
Am 25.03.2014 22:43, : Today I spent good part of my time to figure out that my version of Thunderbolt has some issue with the TSIP protocol definition. I am using following document: ThunderBolt GPS Disciplined Clock User Guide, Version 5.0, Part Number: 35326-30, November 2003 but beware, no single document related to Thunderbolt from Trimbles website is complete nor fully correct. As a reference you may use my code of a simple Tbolt-Monitor you will here: http://www.romahn.info/tbolt2lcd/ regards Götz ___ 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] TSIP protocol for T-Bolt
hi all, as is my commentent to /tvb's question. Hope it helps, Götz Tom, i've found 3 pdf Thunderbolt-Manuals identified as: -V3 from 2000 -V3 from 2003 and -V1 from 2012 Differences are in the Report Packet 0x8F-AC Data Format pp A62,A62 and 81. If you compare, there are differences among Byte 1 (Receiver Mode) Bits 5 and6, Byte 13 (Disciplining Activity) Bits 8 and 9 Bytes 8,9 (Critical Alarms) Bits 1,2,3 Bytes 10,11 (Minor Alarms) Bits 9 and 11 (and yes, Bit 11 is set from my Tbolt (Firmware V3.00) if I remember correctly). Use of Bit 10 (EEPROM invalid) is not decribed. I have not it tested though :-) A rather reliable reference are Messages from Thunderbolt Monitor V2.60. regards Götz Am 26.03.2014 15:05, : but beware, no single document related to Thunderbolt from Trimbles website is complete nor fully correct. Can you give me an example of some TBolt command that is not in the TBolt document? As a reference you may use my code of a simple Tbolt-Monitor you will here: http://www.romahn.info/tbolt2lcd/ regards Götz Nice. Thanks for posting that. Thanks, /tvb ___ 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 Monitor
hallo all, if you are a notorious DIYer, have some soldering skills and know how to program an ATmega8515 microprocessor, have a look at: http://www.g-romahn.de/tbolt2lcd/index.htm for a simple small Thunderbolt monitor cheers Götz Am 17.08.2013 17:53, : This is a repost with a new thread. Sorry for the bandwidth. Looking at the high price (and closed software) of what is currently offered, I have been thinking of making a kit of my GPSMonitor (see KO4BB.com) I think I could sell an assembled and tested kit with a 2x16 char display for $60 or so if I get 50 people interested. This will use a professionally made PWB with surface mounted components. Of course, the source code is free. You do not have to buy anything from me. You can build your own using info on my web site. If anyone is interested, send me a private message. Didier KO4BB ___ 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 MV-89a OCXO Transplant?
Bob, mny thanks for your comprehensive explanation. Now I know much better ;-) As for St. Petersburg: have been there in my pre-MV89 ages. Well worth a visit for some days, no bad guys on my ways. Goetz Am 28.05.2013 23:10, : Hi The MV89A's that are out on eBay are all custom built parts. The part numbers on them do not fully show what they are. About the only way to find out would be a flight to St. Petersburg (not the one in Florida) and a sneak look at their files. If the same guy is still in charge of security that was in charge on my last visit there ... not a good idea. Simple answer - it's a bit of a guess as to what you have once you get past the generic stuff. When a big OEM says build it to this spec that's what everybody does. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Götz Romahn Sent: Tuesday, May 28, 2013 1:12 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Thunderbolt MV-89a OCXO Transplant? Bob, how can I find out what the differences among various MV89 are ? thanks Goetz Am 28.05.2013 18:52, : Hi The MV89A is a 5 MHz resonator doubled to 10 MHz, it will have sub harmonics that the original OCXO (using a 10 MHz resonator) does not have. The MV89A has 10 to 20 db worse phase noise as a stand alone OCXO than the original OCXO. That is masked to some degree by the TBolt's internal noise. Depending on which MV89A you get (there are many flavors), it's temperature stability will be 3X to 10X better than the modern versions of the TBolt OCXO. The ADEV on the MV89A should be ~2X better than the modern TBolt OCXO. The tuning voltage range of the original TBolt OCXO is +/- 5V on the MV89 it's 0 to 5V. The pull range on the original is about 5X greater. Both can be fiddled on the TBolt via LH. Check your TBolt board for the connection (if any) to the Vref pin on the MV89. Shorting it to ground may not be a good thing. Of course your MV89 may or may not have a voltage on the Vref pin. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Frederick Bray Sent: Tuesday, May 28, 2013 10:37 AM To: time-nuts@febo.com Subject: [time-nuts] Thunderbolt MV-89a OCXO Transplant? Looking at the archive, I noticed that several months ago someone commented that the Morion MV 89A was a direct replacement for the OCXO in the Trimble Thunderbolt in the sense that the Thunderbolt PC board is configured to accommodate it. However, I wasn't able to find further details. I have a spare Thunderbolt and a spare MV89A and I am considering doing the transplant. Before I tear the Thunderbolt apart, I have a few questions: 1. Has anyone actually performed the transplant? (Does it work?) 2. Are there any significant drawbacks and advantages to the transplant? I am aware that the MV 89A may pull more current on the 12 volt line than the Trimble and that the original Thunderbolt cover will no longer fit. Thanks. Fred Bray ___ 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] DMTD questions
hi Bob, I had the same problems which I solved (partly) the following way: transformer tc1-1t is offered here: http://www.minikits.com.au/TC1-1T for mixers I took TUF-1 which is rather similar to TUF-R3SM and got it here (you have to bend pins properly): http://www.box73.de/product_info.php?products_id=419 input transformers I got via ebay (160660972892). They are 75 Ohms instead of 50 Ohms, yes one has to compromise power splitter also via ebay (251254674273). The are a little large but by you can fit it in. I know there are some compromises but better than nothing. I am very satisfied with my DMTD. Nearly as good as W.J.Riley's. An additional note for the DDS module: there are some glitches in the layout so beware and check all connections. Resistors and most capacitors are package 0604 other than on mixer module. LM6609 are different package also. hope this helps Goetz Am 27.05.2013 22:27, : Some time back I purchased from Stanley Reynolds the necessary boards for the Riley DMTD. I'm now looking at what's necessary to build out these boards and the Mini Circuits parts are far and away the most expensive parts, due principally to the 10 part minimum on several of the items. I'm wondering if there are any others on the list who are contemplating the Riley DMTD and might wish to split a Mini Circuits parts order to ease the pain? I guess I should also ask if an alternate DMTD in the works and if so, where does it stand at this time? Thanks, Bob Darby ___ 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 MV-89a OCXO Transplant?
Bob, how can I find out what the differences among various MV89 are ? thanks Goetz Am 28.05.2013 18:52, : Hi The MV89A is a 5 MHz resonator doubled to 10 MHz, it will have sub harmonics that the original OCXO (using a 10 MHz resonator) does not have. The MV89A has 10 to 20 db worse phase noise as a stand alone OCXO than the original OCXO. That is masked to some degree by the TBolt's internal noise. Depending on which MV89A you get (there are many flavors), it's temperature stability will be 3X to 10X better than the modern versions of the TBolt OCXO. The ADEV on the MV89A should be ~2X better than the modern TBolt OCXO. The tuning voltage range of the original TBolt OCXO is +/- 5V on the MV89 it's 0 to 5V. The pull range on the original is about 5X greater. Both can be fiddled on the TBolt via LH. Check your TBolt board for the connection (if any) to the Vref pin on the MV89. Shorting it to ground may not be a good thing. Of course your MV89 may or may not have a voltage on the Vref pin. Bob -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Frederick Bray Sent: Tuesday, May 28, 2013 10:37 AM To: time-nuts@febo.com Subject: [time-nuts] Thunderbolt MV-89a OCXO Transplant? Looking at the archive, I noticed that several months ago someone commented that the Morion MV 89A was a direct replacement for the OCXO in the Trimble Thunderbolt in the sense that the Thunderbolt PC board is configured to accommodate it. However, I wasn't able to find further details. I have a spare Thunderbolt and a spare MV89A and I am considering doing the transplant. Before I tear the Thunderbolt apart, I have a few questions: 1. Has anyone actually performed the transplant? (Does it work?) 2. Are there any significant drawbacks and advantages to the transplant? I am aware that the MV 89A may pull more current on the 12 volt line than the Trimble and that the original Thunderbolt cover will no longer fit. Thanks. Fred Bray ___ 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] Repair of PRS10 Lamp Assembly
Thanks for all your comments so far. I did sniffing with a cable loop located in the lamp cell (thank you Bob for this advice), and surprise (!) RF power does not degrade with time but does stay rock solid after ignition. So, sorry Bob, you did not win the bet this time. Next step should be to check, what is going on with heating. Not so easy since all the many diagnostics are within range. As a provisory measure I decided to cheat the lamp heat regulator somehow by paralleling a 39 KOhm resistor to R226 an thereby shifting the operating point of the thermistors in lamp assembly. PPR10, when started properly, now seems to work as expected. One comment to the lamp starting algorithm: oscillator FET drain and gate voltage are controlled via factory set values but not on an individual basis. All lamps are started with FET voltage set to maximum available via SD2=255 and after inginition to some reduced value also via SD2=55. So there is no need to change set values for different lamp assemblies. Goetz Am 18.03.2013 01:34, : Hi I'd bet that something is keeping the oscillator from putting out enough RF. The circuit is simple enough that the issue is one of a very small number of parts. I'd bet on the FET….. Bob On Mar 17, 2013, at 8:24 PM, brucekar...@aol.com wrote: I am afraid the PRS-10 lamp starting algorithm is a little involved. I believe that once the lamp temperature is in the starting range, the microprocessor ramps up the drain and possibly gate voltage of the heating oscillator FET until the bulb strikes as evidenced by a DC signal at the detector. If the lamp overheats (as measured by thermistors imbedded in the back of the lamp block), at some point the microprocessor will reduce the drain voltage to a safe steady-state value. The starting constants for each individual PRS-10 are factory-set in the unit's programmed software, and as far as I know, access to change these settings has not been made available yet to end users. This makes it difficult to swap lamps between units. I have a PRS-10 with a lamp that is just on the edge of starting properly. Since I cannot change the factory-programmed values, I have tried adding a shunt resistor to increase the lamp current to the point where it would reliably start. But, unfortunately, other problems seem to be keeping the unit from working properly. The only luck I have had in repairing a non-working PRS-10 with certainty, was one in a Symmetricom 2500 Time Source that turned out to have a failed Mini-Circuits VCO on the synthesizer board. Replacing the VCO module restored proper operation. Perhaps someday the factory will provide end users with access to what are now factory-only settings. Bruce, KG6OJI ___ 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] Repair of PRS10 Lamp Assembly
thank you for fast responses. As I wrote in my posting, heating seems to be ok as reported by the PRS10 diagnostic tools. I agree with Bob and Paul: RF seems to degrade with warming up, but how can I test this. Remember, lamp and oscillator of PRS10 are not!!! accessible during operation and what part of hte oscillator could be the culprit ( and why do you think it is) ? Goetz Am 17.03.2013 20:59, : My 2 cents and it is that. The FRS use a higher voltage say 24 V and on ignition that drops back. I have also seen on time-nuts older systems that actually use an ignition voltage to trigger the lamp. But I agree that it sounds like the RF might be low. The bulb does need to be heated to get to the right color temperature also. On Sun, Mar 17, 2013 at 9:03 AM, Bob Camp li...@rtty.us wrote: Hi Unless the PRS10 is very unusual in it's operation there are two things to check early in the debug process: 1) Is the oven heating up to roughly the right temperature? 2) The lamp is lit by RF energy. If the oscillator / amplifier supplying the RF isn't putting out as much as it should (or what it should) the lamp will not stay lit. I'd bet on number 2 in your case. There are many other possibilities, but I'd check those two first. Bob On Mar 17, 2013, at 5:22 AM, Dr. Götz Romahn go...@g-romahn.de wrote: dear all, beeing a silent reader of this list for a while, I now ask my first question. I have obtained a PRS10 that was declared faulty and it is. The problem I located in lamp assy. Lamp ignites only after warming up and pushing by a voltage kick from abt. 24V to abt 28V on the -24_heat line for some seconds. PRS10 gets locked there after and rbmon shows a seemingly healthy unit (see attachment). But... within some 15 to 45 minutes later light from lamp degrades as seen through LAMP VIEW hole in top board as well as AD9 Photocell I/V going down from 1.68 after ignition to 0.158 and lock is lost of course. Since all heating and voltage diagnostics do stay within accepted limits I suspect some problem within lamp enclosure (see attachment). Your help for further diagnosis and any hints for obtaining spare parts would be appreciated very much. Cheers Goetz PRS10 after ignition.jpglamp-assy.jpg___ 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.
