Luciano Thanks it simply appears that I have 3 units and some work better then others. Very good comments and read your document Thanks Paul WB8TSL
On Mon, Apr 9, 2012 at 8:53 AM, Timeok <[email protected]> wrote: > 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. > _______________________________________________ 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.
