Re: [time-nuts] PRS10 time to lock
Use the RbMon utility to monitor the unit's operation as it starts up to confirm that the lamp is started and the photocell is detecting a signal. Not long ago there were a number of units available for sale on Ebay that appeared to have a lamp problem. On 23/08/2013 02:10, Paul wrote: As I patiently wait for my PRS10 to lock I'm curious if there's a limit beyond which I should assume the unit is faulty. It does produce abount 10MHz (+- .2 Hz) and the oven current dropped at what I assume is operating temperature. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Stephen Tompsett (G8LYB) ___ time-nuts mailing 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-2077 Teardown
Hi Not all semiconductor processes are created equal. In order to get things going faster you change things around. Past a point, those same changes negatively impact the leakage and 1/f noise corner. When all the changes happen, the jitter goes up. That turns it very much into a test it and see sort of thing. You can not just pick the device off a data sheet. Bob On Aug 21, 2013, at 4:44 PM, Ed Palmer ed_pal...@sasktel.net w Since you're looking for rise times in the low or sub nanosecond range, why wouldn't you include any logic gates where such rise times are inherent? I was thinking of maybe a chain of faster and faster logic gates. For example, Potato Semiconductor - no, I'm not making that up - PO74G04A has a risetime of 1 ns and, if you can keep the load capacitance low enough, a maximum input frequency of 1 GHz. Always trying to learn Ed On 8/20/2013 11:28 PM, Bruce Griffiths wrote: The same analysis applies however one would probably use something like cascaded longtailed pairs with well defined gain (series emitter feedback) and the low pass filter cap connected between the collectors rather than opamps. Bruce Ed Palmer wrote: Does anyone know if this situation would benefit from doing something similar to a 'Collins Hard Limiter' i.e. instead of squaring the signal in one stage, use maybe two or three cascaded stages with increasing bandwidths? Normally, Collins limiters are used with beat frequencies of less than 1 KHz, but maybe there's value in doing at typical time-nuts frequencies. Any thoughts? Ed On 8/20/2013 10:02 PM, Said Jackson wrote: Hi Ed, For anything up to about 150MHz try the NC74SZ04 types from National if you can find them NOS. they stopped making these years ago.. Fairchild is ok too but not as fast from what I have seen. Forgot I wrote about it in 2009. Oh boy -age kicking in. Bye, Said Sent From iPhone On Aug 20, 2013, at 20:17, Ed Palmer ed_pal...@sasktel.net wrote: Hi Said, Yes, I saw your message from 2009 where you warned about the sine waves. That's why I was watching for it. Thanks for the warning. I also realized that a DC Block and a 10 db attenuator makes a very nice TTL or CMOS to Wavecrest converter for anything except 1 PPS which would need about 15 db. I tried an old circuit that uses an MC10116 ecl line receiver - it's actually a dead Racal Dana 1992 counter where I'm using the processing on the external reference input to square up the signal. It gives me a slew rate equivalent to about a 50 MHz sine wave. It helped a lot, but not enough. I'll try a 74AC04 and a BRS2G Differential Line Receiver (risetime 3ns, 400Mbps throughput). Both are in my junkbox. Ed On 8/20/2013 8:12 PM, Said Jackson wrote: Guys, The dts needs to be driven by square waves, driving them with sine waves gives jitter values that are displayed significantly too high due to trigger noise. Holzworth makes a small sine wave to square wave converter that can drive 50 ohms. Use a DC block and an attenuator on the cmos output to avoid damaging the dts inputs. You can make your own converter using a single fast cmos gate, resistor, and blocking cap. By using hand-selected gates I was able to achieve less jitter with that circuit than what the Holzworth box was able to achieve. Doing that conversion can bring down the measured rms jitter on a very good 10MHz sine wave source from 10ps+ to less than 2ps - basically at or below the noise floor of the dts.. Once you run at the units' noise floor, you know your source is quite good.. Bye, Said Sent From iPhone On Aug 20, 2013, at 18:51, Ed Palmer ed_pal...@sasktel.net wrote: Adrian, I used Timelab to assess the reaction of the DTS-2077 to different sine wave inputs. The differences in the noise floor are surprising. The attached picture was made by taking the output of an HP 8647A Synthesized Generator through a splitter, and then through different lengths of cables to the inputs of the DTS-2077. The combination of splitter and cable loss meant I couldn't get +7 dbm @ 1 GHz. If I could have, the 1 GHz line might have been lower than it was. 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.
[time-nuts] Setting up an HP53132A/TimeLab for Time Interval measurement
I am having some difficulty setting up my HP53132A to make 1 PPS Time Interval readings. I am outputting them to TimeLab via the counter's talk-only output. TimeLab reads the counter fine and I am able to make plots of 10MHz frequency comparisons. But I need a little help in properly setting up the counter for 1 PPS readings. If anyone is familiar with using this arrangement and would be willing describe their setup and to exchange a few emails off line, I would much appreciate it. I can be reached at jsrobbins.earthlink.net Jim Robbins N1JR PS: My reason for trying 1 PPS measurement is that while my 10 MHz frequency ADEV (a) readings in TimeLab when measuring one GPSDO vs another GPSDO look very nice, the phase (p) readings of those same runs show quite a bit of drift (e.g. 1.5us/24 hours). ___ time-nuts mailing 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] 'nuther time related comic
The time nut related comics that were posted the other day where good. I made a note to start keeping track of those and similar ones. And in today's funnies I found this one: http://www.gocomics.com/herman/2013/08/21 Cheers, Graham ve3gtc ___ time-nuts mailing 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] 'nuther time related comic
TVB probably drew that when he was in kindergarten :). - Mike Mike B. Feher, EOZ Inc. 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 office 908-902-3831 cell -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Collins, Graham Sent: Friday, August 23, 2013 9:19 AM To: time-nuts@febo.com Subject: [time-nuts] 'nuther time related comic The time nut related comics that were posted the other day where good. I made a note to start keeping track of those and similar ones. And in today's funnies I found this one: http://www.gocomics.com/herman/2013/08/21 Cheers, Graham ve3gtc ___ time-nuts mailing 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] Setting up an HP53132A/TimeLab for Time Interval measurement
Hi There are several approaches to doing 1 pps readings - which one are you trying? 1) Feed in two 1 pps signals, have one start and the other stop the counter 2) Feed in a 10 MHz and a 1 pps signal have the 1 pps start and the 10 MHz stop the counter 3) Feed in an accurate 100 Hz and a 1 ps. Run the same as in 2. Each has their issues and problems. If you have a very accurate 1 pps, then 2 and 3 work pretty well. If the pps is all over the place then 1 is your only rational way to go. Bob On Aug 23, 2013, at 9:14 AM, James Robbins jsrobb...@earthlink.net wrote: I am having some difficulty setting up my HP53132A to make 1 PPS Time Interval readings. I am outputting them to TimeLab via the counter's talk-only output. TimeLab reads the counter fine and I am able to make plots of 10MHz frequency comparisons. But I need a little help in properly setting up the counter for 1 PPS readings. If anyone is familiar with using this arrangement and would be willing describe their setup and to exchange a few emails off line, I would much appreciate it. I can be reached at jsrobbins.earthlink.net Jim Robbins N1JR PS: My reason for trying 1 PPS measurement is that while my 10 MHz frequency ADEV (a) readings in TimeLab when measuring one GPSDO vs another GPSDO look very nice, the phase (p) readings of those same runs show quite a bit of drift (e.g. 1.5us/24 hours). ___ time-nuts mailing 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] PRS10 time to lock
Hi Pretty much all of the small Rb's that I have seen (LPRO, FE 56xx's, PRS-10's) lock up in under 10 minutes if they are running properly at room temperature. Most system level specs seem to want them to be doing something in under 10 minutes. They are fairly far off at lock, but converge to 0.001Hz of final frequency quite quickly. Bob On Aug 22, 2013, at 10:10 PM, paul swed paulsw...@gmail.com wrote: I can't directly speak to a PRS 10 but from the hp 5065 to FE's and FRS 20-40 minutes would be typical. The newer smaller ones seem to be within 20 minutes. They are below .2 Hz when locked. Regards Paul WB8TSL/1 On Thu, Aug 22, 2013 at 9:10 PM, Paul tic-...@bodosom.net wrote: As I patiently wait for my PRS10 to lock I'm curious if there's a limit beyond which I should assume the unit is faulty. It does produce abount 10MHz (+- .2 Hz) and the oven current dropped at what I assume is operating temperature. ___ time-nuts mailing 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] Yb clock - NPR Story on Atomic Clocks
Wow, this new type of clock is not even 100 times more longterm stable than the Cs fountain clock, it's even short-term stable as a H-maser, obviously. In the NIST article: http://www.nist.gov/pml/div688/clock-082213.cfm it's told, that the 1s instability is the same as the 400,000 sec or 5 days stability of the Cs fountain clock, ie. 1e-15..1e-16, I assume. Perhaps NIST can provide the Allan deviation already. Frank ___ time-nuts mailing 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] PRS10 time to lock
Paul, The datasheet says it should lock in under 6 minutes. You may have the lamp assy problems that have been posted before. Corby ___ time-nuts mailing 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] Yb clock - NPR Story on Atomic Clocks
Hi Optical clocks keep getting a little bit better each time they try this or that. They still have a way to go before you will have one running 24/7/365 without it costing more than even NIST can afford to spend. Bob On Aug 23, 2013, at 10:51 AM, Frank Stellmach frank.stellm...@freenet.de wrote: Wow, this new type of clock is not even 100 times more longterm stable than the Cs fountain clock, it's even short-term stable as a H-maser, obviously. In the NIST article: http://www.nist.gov/pml/div688/clock-082213.cfm it's told, that the 1s instability is the same as the 400,000 sec or 5 days stability of the Cs fountain clock, ie. 1e-15..1e-16, I assume. Perhaps NIST can provide the Allan deviation already. Frank ___ time-nuts mailing 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] Austron 1120S Pinout
I just received an Austron 1120S oscillator. Since the 1120 has an 8-pin octal tube plug, I was surprised to find that the 1120S has a 9-pin miniature tube plug. So, before I let the magic smoke out, does anyone have the pinout for an 1120S and/or any info on any equipment it might have been used in? I know it's supposed to have extremely low phase noise so I'm eager to get it running. Thanks, 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.
Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO module?
Hi Guido, Do you have any idea why the unit interprets the date 7168 (0x1c00) days into the future? If I send it today's date in the correct Motorola format, this is how many days it adds to it. If I change the date to try another, it does the same thing. Any idea why? I can correct for it by subtracting 0x1c00 days before sending it, this just seems very odd. Thanks, 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.
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 Monitor
Hi Götz, very nice handy project, just to watch the TB without a PC. You should have as a KIT . Best regards, Ernie. -Original Message- From: Götz Romahn go...@g-romahn.de To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Fri, Aug 23, 2013 6:52 pm Subject: Re: [time-nuts] Thunderbolt Monitor hallo all, f you are a notorious DIYer, have some soldering skills and know how to rogram an ATmega8515 microprocessor, have a look at: ttp://www.g-romahn.de/tbolt2lcd/index.htm or a simple small Thunderbolt monitor heers 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, 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. ou can build your own using info on my web site. If anyone is interested, send me a private message. Didier KO4BB ___ ime-nuts mailing list -- time-nuts@febo.com o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts nd 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] Yb clock - NPR Story on Atomic Clocks
Optical clocks keep getting a little bit better each time they try this or that. They still have a way to go before you will have one running 24/7/365 without it costing more than even NIST can afford to spend. From Daniel Kleppner's Time Too Good to Be True Physics Today, March 2006 http://scitation.aip.org/journals/doc/PHTOAD-ft/vol_59/iss_3/10_1.shtml The accuracy of these clocks has improved by roughly a factor of 10 every decade since they were introduced in the mid-1950s and in the next few years the accuracy is expected to reach 1 part in 10E16. Exponential, just like Moore's law. -- 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.
Re: [time-nuts] Thunderbolt Monitor
I guess the funny comment here is that yes the monitor can be done on anything including a commodore 64 or apple II. But the thread started with Diddier suggesting a $60 US solution and he would write up and package the boards and parts and thats quite reasonable. Anyone willing to take on the real effort of kitting things is really performing quite the service to us time-nuts. Best regards Paul On Fri, Aug 23, 2013 at 12:44 PM, Götz Romahn go...@g-romahn.de wrote: 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.htmhttp://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-nutshttps://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] Yb clock - NPR Story on Atomic Clocks
Here is an announcement article: http://www.sciencemag.org/content/early/2013/08/21/science.1240420.full David On 8/23/13 10:51 AM, Frank Stellmach wrote: Wow, this new type of clock is not even 100 times more longterm stable than the Cs fountain clock, it's even short-term stable as a H-maser, obviously. In the NIST article: http://www.nist.gov/pml/div688/clock-082213.cfm it's told, that the 1s instability is the same as the 400,000 sec or 5 days stability of the Cs fountain clock, ie. 1e-15..1e-16, I assume. Perhaps NIST can provide the Allan deviation already. Frank ___ time-nuts mailing 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] RFTGm-II-Rb - can you gps discipline it without the XO module?
Hi Alan, I haven't seen this behaviour yet, but then I have RFTG shut off for a couple of months since. 7168 is dividible by 7 and the result is 1024. You know the gps week wraps over from 1023 (0x3ff) to 0. Perhaps what you see is the consequence of some software workaround of this problem, in other words the RFTG thinks a gps week rollover must have happened and tries to correct the date. Have fun Guido Von Samsung Mobile gesendet Alan Kamrowski II ala...@earthlink.net hat geschrieben: Hi Guido, Do you have any idea why the unit interprets the date 7168 (0x1c00) days into the future? If I send it today's date in the correct Motorola format, this is how many days it adds to it. If I change the date to try another, it does the same thing. Any idea why? I can correct for it by subtracting 0x1c00 days before sending it, this just seems very odd. Thanks, 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.
Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO module?
It can't be a coincidence that it is exactly 7*rollover. Le 23 août 2013 à 17:57, Alan Kamrowski II a écrit : Hi Guido, Do you have any idea why the unit interprets the date 7168 (0x1c00) days into the future? If I send it today's date in the correct Motorola format, this is how many days it adds to it. If I change the date to try another, it does the same thing. Any idea why? I can correct for it by subtracting 0x1c00 days before sending it, this just seems very odd. Thanks, 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] (no subject)
___ time-nuts mailing 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] RFTGm-II-Rb - can you gps discipline it without the XO module?
Hi Guido and mc235960, It stopped doing it all of a sudden and is now accepting the date properly. I did numerous CPU resets on it and one power down/power up and it still did it. Telling the unit the date was old (1/1/1994) took fine so I kept increasing the year 1999, 2000, 2005, 2015 and finally back to 2013 and it stayed ok. The Motorola @@ea command doesn't have the GPS week in it so I'm not sure how the unit got where it was, but it does seem related to that somehow. I did try to send it 2050 to see how far it would go because the Motorola spec ends at 2017. Perhaps this triggered a fix gps date function in eeprom that added to the date to try to correct for the number of week rollover issue? Thanks, Alan -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Guido Küppers Sent: Friday, August 23, 2013 1:25 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO module? Hi Alan, I haven't seen this behaviour yet, but then I have RFTG shut off for a couple of months since. 7168 is dividible by 7 and the result is 1024. You know the gps week wraps over from 1023 (0x3ff) to 0. Perhaps what you see is the consequence of some software workaround of this problem, in other words the RFTG thinks a gps week rollover must have happened and tries to correct the date. Have fun Guido Von Samsung Mobile gesendet Alan Kamrowski II ala...@earthlink.net hat geschrieben: Hi Guido, Do you have any idea why the unit interprets the date 7168 (0x1c00) days into the future? If I send it today's date in the correct Motorola format, this is how many days it adds to it. If I change the date to try another, it does the same thing. Any idea why? I can correct for it by subtracting 0x1c00 days before sending it, this just seems very odd. Thanks, 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.
Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO module?
Hi According to the guys at Lucent, there were numerous fixes / updates / enhancements of the code in the GPS cards they used. The number they tossed out was hundreds. I suspect that was an exaggeration. Even if it was only dozens there likely are a number of different code images in the cards, each with it's own issues. Bob On Aug 23, 2013, at 2:38 PM, Alan Kamrowski II ala...@earthlink.net wrote: Hi Guido and mc235960, It stopped doing it all of a sudden and is now accepting the date properly. I did numerous CPU resets on it and one power down/power up and it still did it. Telling the unit the date was old (1/1/1994) took fine so I kept increasing the year 1999, 2000, 2005, 2015 and finally back to 2013 and it stayed ok. The Motorola @@ea command doesn't have the GPS week in it so I'm not sure how the unit got where it was, but it does seem related to that somehow. I did try to send it 2050 to see how far it would go because the Motorola spec ends at 2017. Perhaps this triggered a fix gps date function in eeprom that added to the date to try to correct for the number of week rollover issue? Thanks, Alan -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Guido Küppers Sent: Friday, August 23, 2013 1:25 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] RFTGm-II-Rb - can you gps discipline it without the XO module? Hi Alan, I haven't seen this behaviour yet, but then I have RFTG shut off for a couple of months since. 7168 is dividible by 7 and the result is 1024. You know the gps week wraps over from 1023 (0x3ff) to 0. Perhaps what you see is the consequence of some software workaround of this problem, in other words the RFTG thinks a gps week rollover must have happened and tries to correct the date. Have fun Guido Von Samsung Mobile gesendet Alan Kamrowski II ala...@earthlink.net hat geschrieben: Hi Guido, Do you have any idea why the unit interprets the date 7168 (0x1c00) days into the future? If I send it today's date in the correct Motorola format, this is how many days it adds to it. If I change the date to try another, it does the same thing. Any idea why? I can correct for it by subtracting 0x1c00 days before sending it, this just seems very odd. Thanks, 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.
[time-nuts] Yb clock Allan deviation
Hi, Andrew Ludlow himself was so kind to send me the Sciencexpress article, just a few minutes ago.. A pity that I can't post it here (2.2MB). The Allan deviation is nearly linear, following roughly a 3.2E-16/sqrt(tau) equation (calculated for a single clock). At tau = 1 sec, the instability is about 2e-16 increasing to 3e-16 at 3sec, then approaching the given equation. 1.6e-18 is attained at 25.000sec only. The interrogation time seems to be 1-5sec, still with many interruptions (25% time-outs). Further realistic improvements (more atoms, mitigation of several parasitic effects) may yield 1e-18 in 100sec in the future. Frank ___ time-nuts mailing 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] Yb clock - NPR Story on Atomic Clocks
Don't you just love paying to access research that your taxes already paid for? Gives you a warm, fuzzy feeling all over. :-P -- john, KE5FX Miles Design LLC -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David McGaw Sent: Friday, August 23, 2013 11:06 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Yb clock - NPR Story on Atomic Clocks Here is an announcement article: http://www.sciencemag.org/content/early/2013/08/21/science.1240420.full David On 8/23/13 10:51 AM, Frank Stellmach wrote: Wow, this new type of clock is not even 100 times more longterm stable than the Cs fountain clock, it's even short-term stable as a H-maser, obviously. In the NIST article: http://www.nist.gov/pml/div688/clock-082213.cfm it's told, that the 1s instability is the same as the 400,000 sec or 5 days stability of the Cs fountain clock, ie. 1e-15..1e-16, I assume. Perhaps NIST can provide the Allan deviation already. Frank ___ time-nuts mailing 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] PRS10 time to lock
Hi Paul: Use the Rb monitor program to check to see if the unit is in the mode to lock. There's another mode where the Rb is free running and the 1PPS is time stamped. If in this mode there's no lock. Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html Paul wrote: As I patiently wait for my PRS10 to lock I'm curious if there's a limit beyond which I should assume the unit is faulty. It does produce abount 10MHz (+- .2 Hz) and the oven current dropped at what I assume is operating temperature. ___ time-nuts mailing 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] Yb clock - NPR Story on Atomic Clocks
An even bigger problem is that once they decide they are not making enough money with it, it won't even be available at any price. Didier KO4BB John Miles j...@miles.io wrote: Don't you just love paying to access research that your taxes already paid for? Gives you a warm, fuzzy feeling all over. :-P -- john, KE5FX Miles Design LLC -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David McGaw Sent: Friday, August 23, 2013 11:06 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Yb clock - NPR Story on Atomic Clocks Here is an announcement article: http://www.sciencemag.org/content/early/2013/08/21/science.1240420.full David On 8/23/13 10:51 AM, Frank Stellmach wrote: Wow, this new type of clock is not even 100 times more longterm stable than the Cs fountain clock, it's even short-term stable as a H-maser, obviously. In the NIST article: http://www.nist.gov/pml/div688/clock-082213.cfm it's told, that the 1s instability is the same as the 400,000 sec or 5 days stability of the Cs fountain clock, ie. 1e-15..1e-16, I assume. Perhaps NIST can provide the Allan deviation already. Frank ___ time-nuts mailing 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. -- Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do other things. ___ time-nuts mailing 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] Yb clock - NPR Story on Atomic Clocks
On Fri, Aug 23, 2013 at 03:03:13PM -0700, John Miles wrote: Don't you just love paying to access research that your taxes already paid for? Gives you a warm, fuzzy feeling all over. :-P Now, now, perhaps it is better to feed the (GOP) pigs than let them ban the research altogether as not conforming to their simplistic world view... -- john, KE5FX Miles Design LLC -- Dave Emery N1PRE/AE, d...@dieconsulting.com DIE Consulting, Weston, Mass 02493 An empty zombie mind with a forlorn barely readable weatherbeaten 'For Rent' sign still vainly flapping outside on the weed encrusted pole - in celebration of what could have been, but wasn't and is not to be now either. ___ time-nuts mailing 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] Needed: The Real Serial USB Fix
On Sun, Jan 27, 2013 at 06:47:07PM -0500, Peter Gottlieb wrote: What I would really like in Windows is a way to lock the configuration and make it more of an appliance which always worked the same way. That way a small board talking to a Thunderbolt would always start up and just run. I suppose I need to get away from Windows and climb the Linux learning curve. Yes, or become a Windows kernel maven. It IS possible to figure some of this out, but Windows internally is somewhat bizzare... Linux is nice in that you can look at the code if it comes to that (and if you are really desperate and willing to pay the price, change it too)... -- Dave Emery N1PRE/AE, d...@dieconsulting.com DIE Consulting, Weston, Mass 02493 An empty zombie mind with a forlorn barely readable weatherbeaten 'For Rent' sign still vainly flapping outside on the weed encrusted pole - in celebration of what could have been, but wasn't and is not to be now either. ___ time-nuts mailing 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] Needed: The Real Serial USB Fix
Hi Pardon my interjection …. but. For a simple TBolt monitor, *any* OS is total overkill. If all you have is a small / simple display - you can't put much up there. For a monitor you don't have a keyboard / mouse / usb touchpad / Bluetooth presentation wand. Nothing to do and nothing to control. One big loop and not a lot else will do the trick with lots of time left over. If you want to go crazy, run one of the free RTOS distributions that the semiconductor companies give away. Freescale passes out MQX / MQX-lite. The others have similar stuff. They all have way more in them than this sort of application requires. Bob On Aug 23, 2013, at 9:17 PM, David I. Emery d...@dieconsulting.com wrote: On Sun, Jan 27, 2013 at 06:47:07PM -0500, Peter Gottlieb wrote: What I would really like in Windows is a way to lock the configuration and make it more of an appliance which always worked the same way. That way a small board talking to a Thunderbolt would always start up and just run. I suppose I need to get away from Windows and climb the Linux learning curve. Yes, or become a Windows kernel maven. It IS possible to figure some of this out, but Windows internally is somewhat bizzare... Linux is nice in that you can look at the code if it comes to that (and if you are really desperate and willing to pay the price, change it too)... -- Dave Emery N1PRE/AE, d...@dieconsulting.com DIE Consulting, Weston, Mass 02493 An empty zombie mind with a forlorn barely readable weatherbeaten 'For Rent' sign still vainly flapping outside on the weed encrusted pole - in celebration of what could have been, but wasn't and is not to be now either. ___ time-nuts mailing 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] Yb clock Allan deviation
Frank, You are welcome to upload the article to my web site's manuals pages: Http://WWW.KO4BB.com/manuals Didier KO4BB Frank Stellmach frank.stellm...@freenet.de wrote: Hi, Andrew Ludlow himself was so kind to send me the Sciencexpress article, just a few minutes ago.. A pity that I can't post it here (2.2MB). The Allan deviation is nearly linear, following roughly a 3.2E-16/sqrt(tau) equation (calculated for a single clock). At tau = 1 sec, the instability is about 2e-16 increasing to 3e-16 at 3sec, then approaching the given equation. 1.6e-18 is attained at 25.000sec only. The interrogation time seems to be 1-5sec, still with many interruptions (25% time-outs). Further realistic improvements (more atoms, mitigation of several parasitic effects) may yield 1e-18 in 100sec in the future. Frank ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Sent from my Motorola Droid Razr 4G LTE wireless tracker while I do other things. ___ time-nuts mailing 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] Yb clock - NPR Story on Atomic Clocks
All NIST papers are available for free. Makes you happy to be a taxpayer. The one you're talking about is at: http://tf.boulder.nist.gov/general/pdf/2688.pdf /tvb (iPhone4) On Aug 23, 2013, at 3:03 PM, John Miles j...@miles.io wrote: Don't you just love paying to access research that your taxes already paid for? Gives you a warm, fuzzy feeling all over. :-P -- john, KE5FX Miles Design LLC -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of David McGaw Sent: Friday, August 23, 2013 11:06 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Yb clock - NPR Story on Atomic Clocks Here is an announcement article: http://www.sciencemag.org/content/early/2013/08/21/science.1240420.full David On 8/23/13 10:51 AM, Frank Stellmach wrote: Wow, this new type of clock is not even 100 times more longterm stable than the Cs fountain clock, it's even short-term stable as a H-maser, obviously. In the NIST article: http://www.nist.gov/pml/div688/clock-082213.cfm it's told, that the 1s instability is the same as the 400,000 sec or 5 days stability of the Cs fountain clock, ie. 1e-15..1e-16, I assume. Perhaps NIST can provide the Allan deviation already. Frank ___ time-nuts mailing 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] PRS10 time to lock
Use the RbMon utility to monitor the unit's operation as it starts up to confirm that the lamp is started and the photocell is detecting a signal. I'm not at all clear how to interpret the output but I think having the FET voltage stuck on 255 means the lamp isn't igniting. It also reports high drain, low gate and low photo i/v. Since I have no hardware sense I'm going to write this off as a bad lamp or other hardware failure. Thanks to all for the help. -- 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.
Re: [time-nuts] Needed: The Real Serial USB Fix
Hi Pardon my interjection …. but. For a simple TBolt monitor, *any* OS is total overkill. If all you have is a small / simple display - you can't put much up there. For a monitor you don't have a keyboard / mouse / usb touchpad / Bluetooth presentation wand. Nothing to do and nothing to control. One big loop and not a lot else will do the trick with lots of time left over. If you want to go crazy, run one of the free RTOS distributions that the semiconductor companies give away. Freescale passes out MQX / MQX-lite. The others have similar stuff. They all have way more in them than this sort of application requires. Bob Sounds like a job for the Raspberry Pi. Low-cost, low-power, has serial I/O, and yet can still be programmed in C/C++ or Pascal/Delphi, can run a Web server, so you can perhaps re-use existing code from another OS. Low-cost displays available too. I'm using one of my RPi cards as a digital wall clock - no keyboard, mouse etc., and can be accessed over the 'net if needed. 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.
Re: [time-nuts] Needed: The Real Serial USB Fix
There was one just posted here using the Atmel AVR chip. He used a total of about $12 in parts. You could use a TI Launchpad if you don't like soldering and still spend less than $20. And as was said, no OS at al. It is simply not required for such a simple job. If it were me, I remove the LCD display. I don't see a need when everyone today has a phone. the little AVR chip can bit-bang a UDP packet once per second and put it on your wifi router. That cuts the parts cost by 1/3rd and the display will be where you can see it, on the phone or computer. On Fri, Aug 23, 2013 at 6:29 PM, Bob Camp li...@rtty.us wrote: Hi Pardon my interjection …. but. For a simple TBolt monitor, *any* OS is total overkill. If all you have is a small / simple display - you can't put much up there. For a monitor you don't have a keyboard / mouse / usb touchpad / Bluetooth presentation wand. Nothing to do and nothing to control. One big loop and not a lot else will do the trick with lots of time left over. If you want to go crazy, run one of the free RTOS distributions that the semiconductor companies give away. Freescale passes out MQX / MQX-lite. The others have similar stuff. They all have way more in them than this sort of application requires. Bob On Aug 23, 2013, at 9:17 PM, David I. Emery d...@dieconsulting.com wrote: On Sun, Jan 27, 2013 at 06:47:07PM -0500, Peter Gottlieb wrote: What I would really like in Windows is a way to lock the configuration and make it more of an appliance which always worked the same way. That way a small board talking to a Thunderbolt would always start up and just run. I suppose I need to get away from Windows and climb the Linux learning curve. Yes, or become a Windows kernel maven. It IS possible to figure some of this out, but Windows internally is somewhat bizzare... Linux is nice in that you can look at the code if it comes to that (and if you are really desperate and willing to pay the price, change it too)... -- Dave Emery N1PRE/AE, d...@dieconsulting.com DIE Consulting, Weston, Mass 02493 An empty zombie mind with a forlorn barely readable weatherbeaten 'For Rent' sign still vainly flapping outside on the weed encrusted pole - in celebration of what could have been, but wasn't and is not to be now either. ___ time-nuts mailing 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. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing 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] Torpey Controls CLK-5 Master Clock manual or schematic.
Hello all, I'm looking for a manual with schematics or at least an electronic copy of the schematics. Thank you, Merchison ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
