Re: [time-nuts] GPSDO Crystal Aging

Hi Brooke, HP had some way around SA that improved the timekeeping. HP called it the Smartclock Algorithm and you can find some very basic information about it here: http://www.hpl.hp.com/hpjournal/96dec/dec96a9.pdf I have been trying months to find a reference on how it REALLY works but it

[time-nuts] Measuring the accurcy of a wrist watch

for ANALOG quarz watches. As far as I understand it does not try to detect the quarz frequency but detects magnetic pulses from the step motors that move the hands of the watch. Has anyone of you ever tried to do this in a time nuts laboratory? Best regards and TIA Ulrich Bangert www.ulrich

Re: [time-nuts] Software for use HP 82350B gpib card.

Rui, if this card is supported by Agilent's VISA library then you can give a try to my EZGPIB tool available from: http://www.ulrich-bangert.de/html/downloads.html Best regards Ulrich -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im

Re: [time-nuts] Measuring the accurcy of a wrist watch

Tom, can you explain what exactly you understand by a large coil of wire? Did you make the easurements on the Junghans with a DIY sensor or with one of the commercially available? I have made some basic tests with a coil coming from a loudspeaker's cross over network. It has a few hundred

Re: [time-nuts] Measuring the accurcy of a wrist watch

Chris, I do not own a guitar with single coil pickups but I will surely give it a try to find out whether the humbuckers of my Gibson Firebird SG Standard will also do the trick! Best regards Ulrich -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com

Re: [time-nuts] Measuring the accurcy of a wrist watch

Tom, many thanks for your help. Will give it a new try over Eastern! Best regards -Ursprüngliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Tom Van Baak Gesendet: Mittwoch, 16. April 2014 19:44 An: 'Discussion of precise time and

Re: [time-nuts] Measuring the accurcy of a wrist watch

Mark, is wrist watch not the common English word for a clock that you wear at your wrist? In my case it is a BREITLING Aerospace chronometer. Best regards Ulrich -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Mark Sims

Re: [time-nuts] PI Math question

Warren, the job of a controller, regardless of P, PI od PID, is to minimize the error between a process value and its setpoint. Since I see no setpoint value in any of your versions my 50 ct is that none of them really incorporates a controller at all and that for this reason the question whether

Re: [time-nuts] PI Math question

Message - From: Ulrich Bangert df...@ulrich-bangert.de To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Sent: Thursday, April 17, 2014 1:14 AM Subject: Re: [time-nuts] PI Math question Warren, the job of a controller, regardless of P, PI od PID

Re: [time-nuts] Stanford RS620 Acting up

I had similar difficulties with my SR620. I rewired the cables to the power switch so that the out position now switches the power on and the in position switches the power off. This has worked for me in the last 4 years. Ulrich Bangert -Ursprüngliche Nachricht- Von: time-nuts-boun

Re: [time-nuts] HP Z3805A com port and monitoring questions

There's another telco model that has an MTI 260 oscillator, that I think was manufactured in Korea but does not have the Samsung logo on the front. I don't know much about that one. I do own a Z3805 WITH the Samsung logo on the front AND WITH a MTI 260 inside. Regards Ulrich Bangert

Re: [time-nuts] Z3805 incident

Volker, please note that much of the clear text in the status information is generated by Z38XX itself to make it easier to read. 2012-11-28 10:01:40: The last Smartclock Status is undefined 2012-11-28 10:01:40: Starting with status LOCK for example means that Z38XX is unaware of the

Re: [time-nuts] Termination talk

Simon, ...which prefers to remain anonymous... sounds as if it were a group of criminals or so. Best regards Ulrich Bangert -Ursprüngliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von M. Simon Gesendet: Mittwoch, 28. November 2012

Re: [time-nuts] Measuring GPS noise floor (sort of)

Mark, what you are doing is not wrong but must be interpreted in the correct way. Please keep in mind that you are NOT comparing two naked GPS receivers. In fact you are comparing the outputs of two GPSDOs. The deeper sense of a GPSDO is to surpress the noise floor of the GPS receiver as good as

[time-nuts] OT: Question on dead HP34401

answers Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener ___ time-nuts mailing 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] New EZGPIB version

Gentlemen, a new EZGPIB version is available from the usual place. The improvement against the former version is increased speed in writing large data files. Enjoy Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener ___ time

[time-nuts] Real YIG data was: YIG oscillator drift question

in the File menu is disabled and Open the file. While it is surely not comparable to even the worst Xtal it is not as bad as has been reported here from Bob. 73s and Best regards Ulrich Bangert, DF6JB -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com

Re: [time-nuts] OT: Question on dead HP34401

-15 has this reset output which is called XPONRST. After it has passed the lowpass R503/C504 on page 9-13 (upper left) it enters U500 and U501. I observe this 7 kHz reset signal RIGHT from the lowpass even if I lift up the voltage regulator's reset output pin. Best regards Ulrich Bangert

Re: [time-nuts] OT: Question on dead HP34401

are not as spectacular as the question WHY they are there. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von paul swed Gesendet: Montag, 17. Dezember 2012 15:12 An: Discussion of precise time and frequency

Re: [time-nuts] Z3805A cooling requirements?

. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Tom Van Baak Gesendet: Montag, 24. Dezember 2012 18:48 An: Discussion of precise time and frequency measurement Betreff: Re: [time-nuts] Z3805A

Re: [time-nuts] Low noise power supplies?

Linear Technology application note 83 Performance Verification of Low Noise, Low Dropout Regulators holds some interesting information. I am however unsure whether what was low noise in 2000 is still low noise in 2013 Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time

Re: [time-nuts] Low noise power supplies?

Charles et al, http://www.pst.netii.net/spice/ripple/ripple.htm holds some interesting spice simulations of various refinement techniques. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von

Re: [time-nuts] Off topic project sort of heart rate monitor NEED BEATS PRE MINUTE TO ANALOG VOLTAGE

but using typical commerical power supplies driven from the main is not acceptable for medical applications. Correct! But power supplies that are approved for medical applications can easily be bought from MEANWELL and they do not cost the world. At

Re: [time-nuts] Typical HP 5370B resolution ?

Mark, given the fact that the measurement results of a 5370 are integer multiples of 20 ps it is absolutely natural to see these steps in a phase plot, at least if the input signals are not bad conditioned. I guess however the question for the typical 5370 resolution was not whether these steps

[time-nuts] Distribution amplifier phase noise

spurs? Can it be that the spurs to be seen are not a problem of the amplifier itself but are inherent to the measurement setup? If so, is there a recommended setup to minimize such problems? Thanks in advance for your suggestions. I appreciate the expertise in this group a lot! Ulrich Bangert

[time-nuts] Z38XX

Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener ___ time-nuts mailing 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] ADF4002 phase noise - in FireFly-IIA-100MHz

John and Said, from my limited understanding of things I would have guessed that the ADF4001/2 PFD's ability to produce very short pulses in the locked condition puts a lot of energy into higher harmonics of the PFD's output, making it more easy for the loop filter to remove them. In contrast to

Re: [time-nuts] Balanced Mixer App Note

regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Bob Camp Gesendet: Samstag, 27. Marz 2010 15:34 An: Discussion of precise time and frequency measurement Betreff: Re: [time-nuts] Balanced Mixer App

[time-nuts] In search of a 5061 repelacement tube

contact me offline at df...@ulrich-bangert.de Best regards Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time

Re: [time-nuts] GPS PPS smoothing article

it: What some members of this group would do as a weekend fun project is EC funded research for others! Readings like that show what really massive knowledge is available with the members of this group. Cheers Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com

Re: [time-nuts] HP 104AR

Marco, I have a scanned manual of the HP103AR (direct predecessor of the 104) available that should be better than nothing. However it is appr. 10 MB big. Can I attach a file of that size to a mail to your direct address? Best regards Ulrich, DF6JB -Ursprungliche Nachricht- Von:

Re: [time-nuts] Lying to Lady Heather

%20without%20a%20PhD.pdf Tim Wescott is a very experienced engineer and one of the protagonists in the newsgroup on DSP topics. Regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Bill Hawkins Gesendet

[time-nuts] Z3805 utility, Was: AW: (no subject)

in conjunction with Z38XX should take you pretty far in either get it to run or otherwise diagnose a fault. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Robert Benward Gesendet: Samstag, 22. Mai 2010 03

Re: [time-nuts] Z3805 utility, Was: AW: (no subject)

in the Parameters window. And yes, I know, being an owner of a Z3805 I should know exactly but I don't remember the day that I made the cable and I currently cannot access the back of my Z3805. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com

Re: [time-nuts] Digital tight PLL method

try. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von WarrenS Gesendet: Montag, 24. Mai 2010 18:49 An: John Miles; Tom Van Baak; Discussion of precise time and frequency measurement Betreff

Re: [time-nuts] Digital tight PLL method

Bob, sure! But I own this stuff not only for this purpose... Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Bob Camp Gesendet: Mittwoch, 26. Mai 2010 12:57 An: Discussion of precise time

[time-nuts] A philosophy of science view on the tight pll discussion

to conclude that the method works ok for all practical aspects of time nuts life (however without the guarantee for every future experiment outcome). Having not done these experiments yet who knows whether there is a falsifying experiment among the set of combinations? Best regards Ulrich Bangert

Re: [time-nuts] TPLL secret reveled

regards Ulrich Bangert -Ursprüngliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von WarrenS Gesendet: Donnerstag, 10. Juni 2010 06:06 An: Discussion of precise time and frequency measurement Betreff: [time-nuts] TPLL secret reveled

Re: [time-nuts] TPLL secret reveled

at least...say: Handle this case with care. Because in such a situation either winning the Nobel prize with it or to be committed into a closed ward are both possible outcomes of the claim. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time

Re: [time-nuts] TPLL secret reveled

. This principle has nothing to do with sub clock interpolation. Nevertheless it is true that once that the reciprocal principle has been introduced it has been used in all following technologies. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts

Re: [time-nuts] Advantages.. CAN THIS STOP PLEASE

Yes, Yes, Yes! Ulrich Bangert Ortholzer Weg 1 D-27243 Gross Ippener Germany Am 21.06.2010 um 18:25 schrieb saidj...@aol.com: CAN THIS FREAKING THREAD STOP PLEASE. Said In a message dated 6/21/2010 05:20:19 Pacific Daylight Time, sar10...@gmail.com writes: Bob, On 21 June 2010

Re: [time-nuts] Advantages.. CAN THIS STOP PLEASE

Don, you name it or don't you ? Ulrich Bangert Ortholzer Weg 1 D-27243 Gross Ippener Germany Am 21.06.2010 um 20:04 schrieb Don Latham d...@montana.com: Oh, c'mon. I haven't had this much fun since, say, the third grade... Don Ulrich Bangert Yes, Yes, Yes! Ulrich Bangert Ortholzer

Re: [time-nuts] Clearing the data in Z38XX software

data worth one calendar week and that the calendar week's number is clearly to be recognized in the filename. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Robert Benward Gesendet: Donnerstag, 24

Re: [time-nuts] Auto TBolt TC Adjust

that has run for some weeks or so lives well with a time constant of 1000. More than that is no improvement because then the loop cannot follow the dayly temperature changes in a typical flat anymore. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com

[time-nuts] Picosecond resolution techniques

Gentlemen, here is a paper that I found by luck which gives a good overview about picosecond resolution measurements: http://ztc.wel.wat.edu.pl/kalisz/met4_1_004.pdf Best regards Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener

Re: [time-nuts] Rubidium oscillator controlled clock

Nice stuff, Bernd! I understand that you received some negative feedback on your ripple counter divider circuit but a single resync flipflop on its outputs in front of the AC04 drivers will do the job. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun

Re: [time-nuts] Rubidium oscillator controlled clock

performance a LT1016 will do it for you too. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von ulm...@vaxman.de Gesendet: Montag, 12. Juli 2010 14:06 An: TIME-NUTS@febo.com Betreff: Re: [time-nuts

Re: [time-nuts] Any clock disturbances during the July 11 solar eclipse?

Antonio, attached is a recording of my Z3805's EFC along July 11. Times are in UTC. Best regards Ulrich -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von iov...@inwind.it Gesendet: Montag, 12. Juli 2010 22:19 An:

Re: [time-nuts] Any clock disturbances during the July 11 solareclipse?

Bert, lacking a 3805 manual my guess is that the 3805 EFC scale may be considered the same as the 3801's one. Which would lead to the conclusion that 1 EFC unit equals roughly 1.0E-12 of relative frequency change of the LO. Symmetricon seems to have believed that the MTI 260 type double oven

Re: [time-nuts] Any clock disturbances during the July11solareclipse?

-modem cable. Murray Greenman, another member of time nuts, has written a nice manual for it (included in the zip) so that you should not have big difficulties to get it run. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun

Re: [time-nuts] Any clock disturbances during the July 11solareclipse?

Bert, I am really unsure whether the drift alone should make me think that the parts are bad. If the drift can be modelled well by the regulation loop (and the Z3805's software seems to do so) it can well be compesated for. Unfortunately even here is no real expert for MTI stuff who could tell us

Re: [time-nuts] Updated Shera controller

local pps and GPS pps is the aim. Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Poul-Henning Kamp Gesendet: Mittwoch, 28. Juli 2010 22:47 An: Discussion of precise time and frequency measurement Betreff: Re

Re: [time-nuts] What's the lifetime for a HP Z3801a?

Mike, Can I do that from SatStat? If you can't then you can do it with my free Z38XX. Best regards Ulrich -Ursprüngliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Mike Feher Gesendet: Sonntag, 29. August 2010 13:25 An:

Re: [time-nuts] Question about SoundCard stability?

was going to compute everything online to chunks of data worth one second of samples signals. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von shali...@gmail.com Gesendet: Donnerstag, 14. Oktober 2010

Re: [time-nuts] Rb references for audiophiles?

of alltime favourite records and is surely also enjoyed by other non-audiophiles all over the world. Otherwise the discussion reflects very well what's going on in my technician's heart concerning audiophile gadgets. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: [EMAIL

Re: [time-nuts] Efratom LPRO Rubidium

Hal, My LPRO is 4 or 5 milli Hz high. I can't see any changes with temperature and my setup swings through 15 F p-p during most days. The TC of a LPRO is in the order of -7E-13 / Deg C or even less. That is why you see no changes: They are there but a bit beyond most measurement

Re: [time-nuts] Double ovened 10811-60158 on ebay

Magnus, I keep wondering if not a passive oven (metal box, insulation, metal box) would be sufficient. Worst case temperature change rates would be significantly reduced such that the oven loop can track it better. The remaining temperature shift will be less. Basically acts like a

Re: [time-nuts] precise external reference time for a PC

Marc, ...preferrably an atomic clock that I can hook if you need the stability and precision of an atomic clock you will of course not come around to REALLY use one! However, for everything else I would do it like that: Generate a 14.318 MHz signal phase locked or DDS synthesized from the

Re: [time-nuts] Thunderbolt SV and AMU Signal levels

not of the technology of today. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von John Franke Gesendet: Mittwoch, 23. Juli 2008 02:28 An: Discussion of precise time and frequency measurement Betreff: Re: [time-nuts

Re: [time-nuts] LPRO 101 ADJUSTMENT

and not in terms of the OUTPUT frequency which may be consirable less resolution. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Joseph M Gwinn Gesendet: Dienstag, 5. August 2008 16:53 An: Discussion of precise time

Re: [time-nuts] New 10mhz Distribution Amplifier

Rick, Compare, for example, the HP5087, a so-so design, to the output amplifier design in the 5071A cesium, as documented in my FCS paper in 1992. Huge difference in specs. The 5071A has 120 dB isolation between outputs. If I look at your FCS92 paper and specially to figures 5 and 6: Do I

Re: [time-nuts] 10811A versus 10811-60111

the specs. Is there any idea on why these two oscillators behave that different? Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von corby d dawson Gesendet: Dienstag, 26. August 2008 19:23 An: time-nuts@febo.com

[time-nuts] AVR PPSDIV

an complete port A since that one is osed for the output. My PLOTTER utility has been updated and now features an ALL-TAU option for stability computations. My EZGPIB utility has some errors less than before... Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener

[time-nuts] Which GPS receiver ?

Gents, over the course of the last year I have lost track on what is the state of the art in GPS timinig receivers. Is there still something like the MOTOROLA M12+ available or a descendant or a compatible model? Or what would otherwise be the choice of today? Best regards and TIA Ulrich

[time-nuts] Thunderbolt arrives in Germany

Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener ___ time-nuts mailing 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] TBOLT communication

Predrag, I had always thought that Recommended Standard 232 calls the region from -3 to +3 volts a disallowed state and suggests to use at least +/- 5 V levels so that +/- 6 V should be absolutely conform with RS232. Fortunately - or unfortunately ? - all modern RS232 receiver chips have a

[time-nuts] PLOTTER and EZGPIB

Gents, new versions of EZGPIB and PLOTTER are available from http://www.ulrich-bangert.de/html/downloads.html PLOTTER now allows for an unlimited number of comment lines (lines that start with //) in the data file. The comments are displayed in an memo field of their own. Enjoy... Ulrich

Re: [time-nuts] PLOTTER and EZGPIB

-nuts] PLOTTER and EZGPIB Hello Ulrich, I like your program together with the Prologix Interface Box. So I did download your new release, but I cannot find the .exe file inside the zip file. Do I miss something? kind regards, Arnold On Sat, 27 Sep 2008 15:05:33 +0200, Ulrich Bangert

Re: [time-nuts] Testing frequency using NTP

Steve, Hmmm... If I measured a 10MHz oscillator for a 1/10 second, I could achieve, at best, 1ppm accuracy. Now my measuring system has a non accumulating error in the ms range, say 1s, so this would be totally unworkable. If I sampled for 1s, best would be .1ppm accuracy... this is a

[time-nuts] What is the best counter for a Time Nuts?

53132 from eBay to make precise stability measurements ??? TIA for your suggestions Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https

Re: [time-nuts] What is the best counter for a Time Nuts?

a decade too high. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Brooke Clarke Gesendet: Mittwoch, 8. Oktober 2008 23:43 An: Discussion of precise time and frequency measurement Betreff: Re: [time-nuts] What

Re: [time-nuts] PLOTTER EZGPIB

- Original Message From: Ulrich Bangert [EMAIL PROTECTED] To: Time nuts time-nuts@febo.com Sent: Friday, October 10, 2008 3:11:19 AM Subject: [time-nuts] PLOTTER EZGPIB Gentlemen, new versions of PLOTTER and EZGPIB are available. Some bugs concerning the search for Prologix serial

[time-nuts] Disregard, test message only

Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener ___ time-nuts mailing 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] labview, gpib, gps , logging data and lost data points!!

Norman, what you are going to do requires a tight timing: 1) Because of the nature of the M12+'s messages their end is not easily detected (cr and/or line feed may be WITHIN the messages due to their halfbinary nature). A method would be to detect no activity on the M12+'s transmit line for a

[time-nuts] Trimble Thinderbolt schematics

Gents, sorry if this question has been asked before but do we have schematics for our Trimble Thunderbolts available anywhere? Have been unable to locate them so far. TIA Ulrich Bangert www.ulrich-bangert.de Ortholzer Weg 1 27243 Gross Ippener

Re: [time-nuts] labview, gpib, gps , logging data and lost data points!!

Norman, Does EZ-GPIB support visa? Yes, it is not a complete implementation but it should be enough for tasks like that. The idea was to save the data in text files and post-process with excel. Sure possible, but if the decoding can be done in realtime why not do it. Based on my

Re: [time-nuts] Measuring ADEV with a PM6681 or CNT-81

Stefan, Apart from a suitable divider, I'd If you a dedicated follower of PIC microcontrollers you find something suitable here on Tom's pages http://www.leapsecond.com/pages/ppsdiv/ Otherwise if you like AVRs then you can find something on my pages

Re: [time-nuts] M12+T ASCII interface - I'm confused?

Stephan, can you give us a clue what it is all about? What happens with the data after being decoded by the FPGA? Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Stephan Sandenbergh Gesendet: Mittwoch, 19

Re: [time-nuts] M12+T ASCII interface - I'm confused?

device like a serial EEPROM. You see that there are a number of trade offs and one has to think very carefully which solution is the best overall compromise. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Stephan

Re: [time-nuts] Fwd: M12+T ASCII interface - I'm confused?

Stephan, for me the following rules have turned to be optimal for M12+ decoding: 1) Program the M12+ to auto-send all information that you are interested in at a one second update rate. 2) During serial reception do nothing else than to put the received data into a buffer of sufficient length.

Re: [time-nuts] To improve a Tbolt?

I would be interested in this information as well! Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Dan Rae Gesendet: Donnerstag, 20. November 2008 18:58 An: time-nuts@febo.com Betreff: [time-nuts] To improve

Re: [time-nuts] EZGPIB error

Ian, I will be out of the home today and tomorrow but after that I'll tackle this problem. Best regards Ulrich -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Ian Sheffield Gesendet: Sonntag, 23. November 2008 16:48 An: Discussion of

Re: [time-nuts] GPS Valid Fix Detector

Peter, in general NMEA decoding involves 1) Message type detection 2) End of message detection 4) Checksum test 5) Looking for what is to be found between comma N and comma N+1, having in mind that there may also be NOTHING. Best regards Ulrich Bangert -Ursprungliche Nachricht

Re: [time-nuts] GPSDO using 100Hz

to second base. What is true is that the MEAN frequency of the 100 Hz is locked to the GPS and that is why your fast pll works as well as James Miller's. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von WarrenS

Re: [time-nuts] Soundcard sampling Re: Picking a good HP 10811

but after putting your results into a tau-sigma diagram you notice how nasty it is nevertheless. I am writing you this because the real problems of a method are sometimes to be found at places where one would not have expected them at all. Best regards Ulrich Bangert -Ursprungliche Nachricht

Re: [time-nuts] Analog or Digital GPSDO?

Warren, I may be teriible wrong but I understand Tom and his data so that PPS and 100 Hz have the SAME performance (what I had expected) with the PPS being able to be improved by the sawtooth correction. Attached are some seconds of data from my GPSDO which second Tom's measurements as far as the

Re: [time-nuts] Ulrich, re PRS10

Dick, sorry I do not have schematics. I was refering to the manual because of the well explained math of the regulation loop. Best regards Ulrich -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Richard Moore Gesendet: Montag, 8. Dezember

Re: [time-nuts] thermostated 14.31818 MHz

For those that are interested in this method: A read to go crystal heater can be bought from Kuhne Electronics. Look for http://www.kuhne-electronic.de/en/shop/155_Crystal_Heater Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED

Re: [time-nuts] Sub Pico Second Phase logger

frequencies are generated by an old HP3330 locked to 10 MHz in my case. If the circuit had to be designed new I would have used a ANALOG DEVICES dds circuit with a built in clock multiplier. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com

Re: [time-nuts] Sub Pico Second Phase logger

Correction of a typo: 12.288 MHz clock -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Ulrich Bangert Gesendet: Montag, 22. Dezember 2008 08:57 An: 'Discussion of precise time and frequency measurement' Betreff: Re

Re: [time-nuts] ADEV vs. OADEV

Magnus, I am aware that you know a lot about these things. Nevertheless I believe you are starting a most dangerous discussion in the sense that you put some terms into question of which I believed that they have well been established. For that reason let me test where we agree and where not:

Re: [time-nuts] LPRO and switching power supply?

Dan, I run the LPRO (as well as an FRK-L) from an 24 V / 25 W closed frame switched power supply from Mean Well like http://www.meanwell.com/search/ned-100/NED-100-catalog.pdf without any problems. Please note that it does not necessarily mean that the output signal may not be even a bit

Re: [time-nuts] Tbolt temperature sensor

Gents, has anyone checked which DALLAS part is REALLY inside the box? I put forward this question because DALLAS has parts in their portfolio that sell as genuine 12-bit resolution ones and other ones that sell as 9-bit resolution ones where additional 3 bits of resolution can be used by some

Re: [time-nuts] Tbolt temperature sensor

)? The original post did state that the sensor was a DS1620. Mark also stated in a later post that he had replaced the chip a new DS1620 with no effect on the resolution of the reported temperature. Bruce Ulrich Bangert wrote: Gents, has anyone checked which DALLAS part is REALLY inside

Re: [time-nuts] Tbolt temperature sensor

Mark, in this case the DS1620 may perhaps be exchanged against a DS18S20 which definitely supports the high res reading. Bought chips programmed for them at the end of last year. Best regards Ulrich Bangert -Ursprüngliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts

Re: [time-nuts] Different Thunderbolt versions

Bruce, If you look at the Allan deviation plot on the PRS10 page: http://www.thinksrs.com/products/PRS10.htm This indicates that the likely disciplining loop time constant will be several thousand seconds. It should be noted that this plot shows a VERY PESSIMISTIC (almost two decades)

Re: [time-nuts] PIC Divider Performance (was Re: time-nuts Digest, Vol 56, Issue 71)

for the outputs. In contrast to the original design the 100 kHz output has a near perfect 1:1 duty cycle. In the zips you find complete WinAVR projects. Best regards Ulrich Bangert -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag

Re: [time-nuts] Prologix

Mike, I would like to second Brent's information: That is exactly how it is done. Talking to the Prologix interface and talking to the NI interface is COMPLETELY different in that talking to the Prologix always means straightforward serial communication while talking to the NI involves DLL-calls

Re: [time-nuts] P word in my mails

statement, Professor Wirth of the ETH institute and father of the Pascal, Modula 2 and Oberon structured languages, merely stated that P. T. Barnum was correct. Best regards Ulrich Bangert -Ursprüngliche Nachricht

Re: [time-nuts] time-nuts Frequency Divider

Bruce, The problem is more accurately described as: When the bias network dc level at the 74AC04 (or 74HC04) inverter input isn't equal to the switching threshold of the particular device then AM modulation on the input signal is converted to phase noise as switching no longer occurs at

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