Or my E1740A :-) On Wed, May 2, 2012 at 2:18 PM, Tom Knox <[email protected]> wrote: > > I cannot believe my Guidetech GT4000 was left off your list. > > > Thomas Knox > > > >> Date: Wed, 2 May 2012 22:11:25 +0200 >> From: [email protected] >> To: [email protected] >> Subject: Re: [time-nuts] Setting up PRS10 with M12+T GPS >> >> On 05/02/2012 10:03 PM, Azelio Boriani wrote: >> > You don't have a Cs reference but you have a GPS: in the long term it is >> > the same. By using a TIC (your preferred: HP5370B, HP5372A, SR620, PM6680, >> > PM6681, HP53132A, Racal 2351, Yokogawa TA720, PICTIC II, Wavecrest DTS275 >> > [SIA3000?] and others) keep track of the GPS PPS vs. the PRS10 PPS. >> >> Considering the M12+T PPS noise, you won't need anything stellar. A >> PICTIC II will do just fine... or if you trust the PRS-10 readings, run >> from that. >> >> What would make this better would to use a sawtooth-correction to PPS >> delay setup, as the PRS-10 measurement resolution will be about on par >> with that. Would lower the effects of hanging-bridges, even if one >> suffers less when dealing with a rubidium. >> >> Adjust the PRS-10 PLL bandwidth/time-constant, the default value is most >> probably not optimum, you can go further up in time. Do check the manual. >> >> Cheers, >> Magnus >> >> > On Wed, May 2, 2012 at 9:46 PM, Jerry Mulchin<[email protected]> wrote: >> > >> >> I need some guidance from the collective. >> >> >> >> I just finished rebuilding my PRS10 lab standard and it is now using a >> >> M12+T GPS module. >> >> I have completed my site survey and it is now in "hold position mode", >> >> TRAIM is enabled >> >> with 500ns alarm setting and the 1PPS is enabled during non-TRAIM alarm >> >> conditions. >> >> >> >> The PRS10 is set for default 1PPS steering, but all of the other >> >> parameters are just as >> >> I received the unit 5 years ago. >> >> >> >> My questions are these; >> >> >> >> 1.) Should I reset the PRS10 to its Default settings or just adjust >> >> selected parameters to >> >> align the unit for proper operation with the M12+T unit? And if that is >> >> the case, what parameters >> >> need adjusting? >> >> >> >> 2.) Are there any special settings, other than what WinOncore sets, that I >> >> should make to the >> >> M12+T unit? >> >> >> >> 3.) After all this is completed, how do I know that the PRS10 is properly >> >> tracking GPS and >> >> maintaining frequency accurately? I don't have a Cesium reference, but I >> >> do have an un-disiplined >> >> LPRO-101, but I don't think that really helps me determine frequency >> >> accuracy. >> >> >> >> I will be adding the sawtooth correction eventually to the M12+T 1PPS >> >> output, but observed >> >> negative sawtooth with WinOncore shows +/- 14ns changes with some bridging >> >> occasionally. >> >> >> >> While I don't ever want to claim NIST traceability, I would like to be a >> >> close as possible, and I >> >> guess that is the bottom line need here. So what else do I need to do to >> >> get as close as possible? >> >> >> >> Thanks for any help. >> >> >> >> >> >> >> >> >> >> Jerry Mulchin >> >> >> >> >> >> >> >> _______________________________________________ >> >> time-nuts mailing list -- [email protected] >> >> To unsubscribe, go to >> >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> >> and follow the instructions there. >> >> >> > _______________________________________________ >> > time-nuts mailing list -- [email protected] >> > To unsubscribe, go to >> > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> > and follow the instructions there. >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.
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