[time-nuts] PRS10 Rubidium
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.
Re: [time-nuts] SR620 software and adjustment Ref queston
This is your Lab Ref Juerg Koegel 2012/11/12 Tom Knox act...@hotmail.com: In step 2 is this my Lab Ref, or the SR620 ref out that is put into Ext Ref and Input A ? Thomas Knox Date: Mon, 12 Nov 2012 09:52:13 -0800 From: garn...@gmail.com To: time-nuts@febo.com Subject: Re: [time-nuts] SR620 software and adjustment Volker: This is the adjustment procedure that I used: Use the following adjustment sequence to get the frequency spot on: 1. Set the Cal jumper to Cal Enable 2. Connect the reference to Ext Ref (rear) and Input A 3. Switch the counter to Ext Ref 4. Set the CalByte 50 for the best display (this is a very fine adjustement) 5. Switch the counter to Int Ref 6. Set the CalByte 4 for the best display (this adjustement is coarse, optimize!) 7. Set the Cal jumper to Cal Disable The procedure can be found in the list archives and at Brooke Clarke's website at: http://www.prc68.com/I/TandFTE.shtml -Eric On Mon, Nov 12, 2012 at 8:05 AM, Volker Esper ail...@t-online.de wrote: Sorry, I don't want to annoy you, but I can't find the alignment/adjustment procedure for the SR620 - once, I had it... :-( I don's mean that in the manual, there must be another one Bob talked about. By the way: is there any suitable vindous software out there, for talking (and listening) to the SR620 via RS-232? A program like Ulrichs Z38xx would be nice... Thanks a lot and please don't be annoyed - I guess this kind of question is not very inspiring. Volker ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- --Eric _ Eric Garner ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Stanford RS620 Acting up
Use the Sample Size switches Juerg Koegel 2012/10/16 Eric Haskell eric_hask...@hotmail.com: Thanks for all the responses. Well it was even simpler than I expected, All I had to do was a cold reset followed by an autocal. the unit now will power-up with the display active. Apparently it was not a hardware error at all. I now want to calibrate the internal 10 MHz reference. I read the cal procedure several times. I need to set the value of calbyte 4 (and 50 to minimize offset). I found and enabled the cal jumper. I accesses the cal menu. I displayed and can edit the calbyte 0 but I can't seem to figure out how to navigate to the next calbyte. How do I select the calbyte to operate on? Eric Haskell ___ time-nuts mailing 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] TBolt-PRS10
Having a M12+Timing GPS driving the 1 Hz input of my PRS10. I decided to upgrade my house referenc switching to a Tbolt as the 1 Hz source. First I did some time analysis using my HP 5372A controlled by my FTS 4060 Cesium standard that I did turn on beam current three days ago to allow it to settle. Tests showed maximum deviation of 2 nsec with the Tbolt over 1000 seconds and 63 nsec with the GPS (20 nsec with Sawtooth Correction) Again 1000 seconds. Plot's are available but exceed attachment size. The output of the PRS10 in turn disciplines an Oscilloquartz 8600. Here are my questions: Are 2 nsec acceptable for a Tbolt What should the Tbolt loop time be for this application What should the loop time be for the PRS10 What is the long term performance of the Tbolt and what is the contribution due to the GPS signal. What is the resolution of the Tbolt detecting and correcting the 1 pps and is it done by changing the OCXO frequency for short periods. My tests show a slight change. Does any one have a similar setup using a Tbolt and 1 pps input to a PRS10 and experience to share. Thanks for any help. 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.
Re: [time-nuts] SR-620 cal
Use the following adjustment sequence: 1. Set the Cal jumper to Cal Enable 2. Connect the reference to Ext Ref (rear) and Input A 3. Switch the counter to Ext Ref 4. Set the CalByte 50 for the best display (this is a very fine adjustement) 5. Switch the counter to Int Ref 6. Set the CalByte 4 for the best display (this adjustement is coarse, optimize!) 7. Set the Cal jumper to Cal Disable After this calibration my SR620 is with the external reference +/- 3 counts (9'999'999.9997x10'000'000,0003) previous value -210 counts with the internal reference +/- 6 counts previous value -25 counts Best regards Jürg Kögel ___ time-nuts mailing 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] Stanford Research SR620 Measurement Bias
Make the adjustment in the correct sequence: 1. Set the Cal jumper to Cal Enable 2. Connect the reference to Ext Ref (rear) and Input A 3. Switch the counter to Ext Ref 4. Set the CalByte 50 for the best display (this is a very fine adjustement) 5. Switch the counter to Int Ref 6. Set the CalByte 4 for the best display (this adjustement is coarse, optimize!) 7. Set the Cal jumper to Cal Disable After this calibration my SR620 is with the external reference +/- 3 counts (9'999'999.9997x10'000'000,0003) previous value -210 counts with the internal reference +/- 6 counts previous value -25 counts Best regards Jürg Kögel 2009/9/28 Magnus Danielson mag...@rubidium.dyndns.org: Ulrich, Ulrich Bangert wrote: Stan, I believe I made it with calbyte 4 as described on page 71 of the manual. How does that explains the shift with time-base? I think it is the wrong way around for a time-bias like this. Tweaking the time-base will maybe fix it for one of the time-bases, but not for the others. I'm digging deeper into this, I want to know how to fix it if I see it on mine. Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] OT: Basics of voltage calibration?
A good reference is the old Fluke publication Calibration - Philosophy in Practice by Steve Spang. (1975) Be very carefull with standard cells! Never load a cell. Use the cells only with high ohm null detectors. A loaded cell need a long time for regeneration (or come back never to the old value!) I think a good zener reference is a better practical solution for today. 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.
Re: [time-nuts] HP 5371A problem
My 5372A had the same problems. Error: Contact problems in IC sockets and jumpers Remove IC and jumpers and put those back. This solved my problems 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.
Re: [time-nuts] HP 10811-60158 and LPRO-101 on Ebay
The LOCXO ist the oven monitor. See on the manual 10811A/B 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.
Re: [time-nuts] Double ovened 10811-60158 on ebay
2008/7/9 wje [EMAIL PROTECTED]: www.hparchive.com/Manuals/HP-10811AB-Manual.pdf These seem to be a slight variation on the 10811B, but I imagine the pinouts are the same, other than the connectors. Hmm... I think I'll get one. Bill Ezell -- They said 'Windows or better' so I used Linux. Jim Palfreyman wrote: Sorry to pollute the list but some people here may be interested and I think this might be a good buy. Ebay item 250268030266 a bunch of 10811-60158 wrapped up in a second oven that have been pulled from a bunch of HP 58503A. There are 21 units available at US$50 Buy It Now. Postage seems reasonable too. I've bought one and so if anyone knows where I can get the cabling requirements please let me know. Regards, Jim Palfreyman ___ time-nuts mailing list -- [EMAIL PROTECTED] To unsubscribe, go to [2]https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. References 1. mailto:time-nuts@febo.com 2. https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. Also have a look at http://homepage.sunrise.ch/mysunrise/shegnauer/Z3801A/Power%20Supply/z3801a_power_supply.htm http://homepage.sunrise.ch/mysunrise/shegnauer/Z3801A/Outer%20Oven%20Controller/z3801a_outer_oven_description.htm Regards 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] Thunderbolt Group Buy, part 1
Please add me to the list. 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.
Re: [time-nuts] Z3801A schematics?
Look at http://homepage.sunrise.ch/mysunrise/shegnauer/Z3801A/Power%20Supply/z3801a_power_supply.htm 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.
