I have done some test on three GPSDO, plese see this link: http://www.timeok.it/files/gpsdo_frequency_reliability.pdf Luciano -- Luciano P. S. Paramithiotti IZ5JHJ
--------- Original Message -------- From: Discussion of precise time and frequency measurement <[email protected]> To: Discussion of precise time and frequency measurement <[email protected]> Subject: Re: [time-nuts] Austron 2201, Tbolt, HP 3801 comparison question Date: Apr 08, 2012 08:26 AM > Ulrich wrote: > > >The Smartclock in difference seems to be able to adapt regulation > >parameters to its "measurements" of ocxo stability and long term drift. > > I do not know any details about Smartclock, but I believe one of the > things it does is to adjust the oscillator disciplining parameters > (primarily the loop time constant, I suspect, but perhaps more) to > allow 3801s to reacquire lock quickly after a holdover event (or at > startup), then switch to parameters that reduce the deviation once it > is firmly locked. You have to do that manually with a Tbolt if you > want both quick lock and best stability once locked. > > It may also do as you suggest -- use heuristic methods to tweak the > "low deviation" discipline parameters -- but I do not know if that is > the case or, if so, if it is better than Kalman filtering. > > Best regards, > > Charles > > > > > > > > _______________________________________________ > 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. > Sent to you using Uebimiau Webmail version 3.11 Developed by Dave and Todd at http://www.manvel.net and http://www.tdah.us _______________________________________________ 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.
