Re: [time-nuts] Stanford Research SR620 Measurement Bias

Stan, I own a SR620 as well and mine behaves the same (while with a different number of counts) so your's is surely not defective! My understanding a few years ago when I acquired the counter was that this bias is not due to a adjustment in the normal sense but to set a parameter in the counter's

Re: [time-nuts] Can anyone spare an LPRO lamp?

Stanley Reynolds wrote: hope my email client will not mess up the link: www.n4iqt.com/efratom8084008/eeratom_model_frs_lamp_assembly_repair.pdf I think the last paragraph is most interesting as it relates to the lamp itself. Cheers, Magnus ___

Re: [time-nuts] 4046 variations (was EPE GPS....)

Gentlemen, in http://www.elektronik-kompendium.de/public/schaerer/pll4046.htm which unfortunately is available in German language only (the illustrations however speak for themselves!) the author makes an in depth analysis of the self biasing amplifier circuitry of the 4046's input pin 14 and

Re: [time-nuts] Stanford Research SR620 Measurement Bias

Hi Ulrich, Thanks for the insight! I tried manually adjusting the value of CalByte 50 (as per Magnus' suggestion), but it did not make the problem go away. There is interaction between this adjustment and the CalByte 4 adjustment for timebase accuracy, and when all was said and done, I didn't

Re: [time-nuts] Stanford Research SR620 Measurement Bias

Stan, I believe I made it with calbyte 4 as described on page 71 of the manual. Best regards Ulrich -Ursprungliche Nachricht- Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag von Stan Gesendet: Montag, 28. September 2009 14:46 An: time-nuts@febo.com

Re: [time-nuts] Stanford Research SR620 Measurement Bias

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,

Re: [time-nuts] Can anyone spare an LPRO lamp?

Very interesting link. I'd add one cautionary note, the Rb lamp emitts UV light so you should avode looking at the lamp without eye protection. Most plastic safety glasses will stop harmful UV, or use sunglasses or an acrylic (perspex, lucite) shield.   Robert G8RPI. --- On Mon, 28/9/09, Magnus

Re: [time-nuts] Can anyone spare an LPRO lamp?

In message 731009.13735...@web27105.mail.ukl.yahoo.com, Robert Atkinson write s: I'd say the most interesting quote is: [...]that causes failure to more then 99% of the 20 units[...] I think my kinds math teacher would flunk that... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20

Re: [time-nuts] Can anyone spare an LPRO lamp?

Poul, Maybe the last one was 20% functional? :-) Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Poul-Henning Kamp Sent: 28 September 2009 21:09 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts]

Re: [time-nuts] Can anyone spare an LPRO lamp?

No... 20% non-functional ;) David C. Partridge escribió: Poul, Maybe the last one was 20% functional? :-) Dave -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Poul-Henning Kamp Sent: 28 September 2009 21:09 To: Discussion of

Re: [time-nuts] Can anyone spare an LPRO lamp?

The lamp in the LPRO may have a significant difference from the other lamps. The pictures of lamps on Tom's ? page show that each of them has a side arm which is most helpful for filling. The side arm is left out in the cold so any excess rubidium condenses there as a reserve supply. The

Re: [time-nuts] Can anyone spare an LPRO lamp?

Was right, 20% functional... after a war day against an OLED display and a Blackfin PPI, I ended not distinguishing between RGB and BGR ;) Regards, Javier Javier Herrero escribió: No... 20% non-functional ;) David C. Partridge escribió: Poul, Maybe the last one was 20% functional? :-)