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.
