[time-nuts] PN9000 software?

I recently purchased an Aeroflex PN9000 system with the correct modules for doing phase noise measurements. However, I haven't been able to figure out how to get the software for this system. The only digital interface is GPIB. I believe that from the factory the system came with a Dell

[time-nuts] About 10 MHz Optical Distro

Thanks to all the posters. Especially to Dana - That is exactly what I was looking for - suggestions for parts and/or circuits to do the job. I was originally thinking that I would go with a digital circuit (sine to square to sine), but maybe analog/sinewave would be simpler and perform about

[time-nuts] Query about List and about 10 MHz Distro

I am hoping that you can help me about a couple of things: 1) My time-nuts summaries sometimes appear unformatted and unreadable. All the text from all the postings is crammed together without spacing. How can I fix it? 2) I want to distribute 10 MHz references by fiber. There are

[time-nuts] Query about insulated coax panel connectors?

Time-nuts: Having recently run into major ground loop noise issues, I have begun reworking some of my homemade pieces of equipment using insulated coax connectors. My goal is to have one ground connection only in the cases, and that is at the power entry point, either a power cord or the outer

[time-nuts] 5065A phase noise

Timenuts- I was able to borrow a Holzworth HA7062C phase noise analyzer recently and used it to measure phase noise for several oscillators. I have a few questions: 1) I noticed that ground loops can be a significant problem - generating noise peaks at multiples of 60Hz and/or multiples of

[time-nuts] Query about 4060

Time-nuts- It has been a couple of years since I last worked on a 4060 so I have forgotten some of the details. Can someone remind me? Operating the device in manual mode, I can adjust beam gain so that I get a reading. However, ramping the control voltage over its range (which does sweep the

[time-nuts] Issues with Datum FTS 4065A cesium beam reference

Time Nuts- Having fixed the dead power supply on this Datum FTS 4065A, the control panel displays mostly "Major" fault, although this occasionally shifts to "Minor" fault for a brief time. It reports Cesium Module faults that vary from time to time. They are usually one of: 2,18 2,3,18

[time-nuts] FTS 4065A schematics?

Time Nuts- Another project - have an FTS 4065A cesium beam reference with what appears to be a short in the -34V supply line. I have the 4065C Operators Guide, which has partial schematics. However, the C version apparently has only a +34V main supply, whereas the A version has both + and

Re: [time-nuts] time-nuts Digest, Vol 192, Issue 10

display. > (Lester Veenstra) > 4. ESE ES-188 Master Clock : Repair (Gregory Beat) > 5. Re: HP-5372A and HP-5372A operation with no CRT display. > (Magnus Danielson) > 6. 5071A (Bill Notfaded) > 7. Re: 5071A (Bob kb8tq) > 8. Re: 5071A (Tom Van Baak) >

[time-nuts] Austron 2110 schematics?

Time Nuts- I have an Austron 2110 with a severely toasted power controller board. Probably not repairable. I plan to build a substitute with a more modern design. Does anyway have schematics? I noticed correspondence between Magnus Danielson and Harald Hauglin some years ago. Did the manula

[time-nuts] GPSDOs with 10.23 MHz output?

Time-nuts- I recall seeing a few models of GPSDOs that have 10.23 MHz output. Now when I want one I am not having any luck. Any recommendations? Thanks- Jim ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] GPSDO that isn't GPS locked for large time scales?

Time Nuts- I recently purchased (Ebay) a GPSDO from an overseas manufacturer. This is a new item and the Ebay description seemed quite encouraging. Having had one in the lab for several weeks what I observe is that: 1) ADEV for short to medium durations (Tau <1,000 sec) is comparable to or

Re: [time-nuts] Quartz oscillator slow drift/aging

Time Gurus- I have a FPS 1150A quartz oscillator with the 1 PPS disciplining option. With the frequency control set to "manual" I can use the digital thumbwheel control to set 10 MHz correctly. However, for two weeks there has been a steady drift upwards of about 2E-10 per day. I have not seen

[time-nuts] Service manuial for FTS 1050A or 1150A

Does anyone have a service manual for either FTS 1050A or 1150A (they are almost identical)? I have an 1150A with a bad power board Thanks! Jim ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] HV PS Board for FTS 4060?

Does anyone have a spare HV PS board (just the small board with the xformer and the two diode ladders in silicone potting) for an FTS 4060? My +3kv circuit seems to have died and the board is not easy to repair due to the potting. BTW, I did find that the board is not as hard to remove as it

[time-nuts] Dead 5061B

Time Nuts- Thanks to John, Corby, Skip and anyone else I missed who offered help. John got it in one. The hot wire ionizer is open, as measured at the D connector coming out of the tube. I understand that this is a terminal condition. Too bad for me. BTW, I found this note on

[time-nuts] Dead 5061B

Time Nuts- This 5061B was working fine until a recent power failure, after which the unit would not come on line (alarm light stayed lit). Major symptoms now: Beam I ; Second Harmonic; Ion Pump Supply are all 0 on front panel. All other front panel readings are normal. (except for

[time-nuts] Sulzer 5A Repair Notes

Thanks to everyone who had a suggestion re replacing the broken fine frequency adjustment capacitor. AFAIK, there are no glass trimmer caps still made that are the same size. By buying a large number of used/NOS trimmers on Ebay, I eventually found one the right diameter and close enough on

[time-nuts] Cold Rubidium?

Does anyone have any experience/first hand knowledge of this Cold Rubidium standard? https://spectradynamics.com/products/crb-clock/ The specs look very good. The mfr claims that, unlike traditional rubidium oscillators, it has no long-term

[time-nuts] Fine freq control glass capacitor for Sulzer 2.5/5A?

I am looking for a replacement for C3, the fine frequency control capacitor for a Sulzer 5A. In the model 2.5A, this seems to have a special Sulzer part number (2.5-MP4); the actual capacitor in a model 5A is a modification of the JFD VCJ14. Unfortunately, this glass piston capacitor is

[time-nuts] ZCD Article

TNs - Bob Martin asked me to post this article reference about designing ZCD systems. https://app.box.com/s/b7d45z2cpq0x5ilz4jtn7a424btzjdhm Jim ___ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to

[time-nuts] Jan-Derk's DDMTD

Jan-Derk- Excellent and exciting work! Thanks for sharing with the newsgroup... I have a couple of questions: 1. The input bandwidth of the digitizer chip is 750 MHz (very impressive), but what happens to input noise that is aliased? When sampling at 10MHz (plus offset) everything above

[time-nuts] Overseas buying?

Anyone have suggestions about how to buy equipment from out of the country without getting US Customs delays? I have the impression that precision timing devices are on some kind of US list of sensitive technologies, but Customs seems to also be concerned about importing such items. I

[time-nuts] LN RB

John- The LNRB had been powered on continously for several weeks prior to my tests. Also, the same antenna/LNA is feeding multiple GPSDOs (4 others) with Lady Heather connected and running continuously, and none of them exhibited any kind of strange behavior at the times of the anomalies in

[time-nuts] Behavior of a disciplined rubidium oscillator?

Time Nuts- Here is a reference to the LN RB spec sheet: http://jackson-labs.com/index.php/products/ln_rubidium It doesn't seem to give a temperature coefficient. It does say the baseplate temp range is -20 to +70C. Again, my issue is that a slight change in temperature leads to a huge, if

[time-nuts] Behavior of a disciplined rubidium oscillator?

Time Nuts- I have been observing the relative time stability of a Jackson Labs Ln Rb GPS disciplined oscillator and a 5071A cesium reference (undisciplined) , as measured via the 1 PPS outputs and a TIC. See the attached plot for about 8 days of history. Horizontal axis is seconds and vertical

[time-nuts] 53230A TIC and TimeLab

I have recently acquited a 53230A counter and have tried to measure ADEV of a GPSDO with it. I am suspicious of the ADEV numbers reported by TimeLab V1.31 because 1) Timelab disagrees significantly with the ADEV numbers reported by the 53230A itself. In this case, with 1 sec sample intervals,