Charles, > I have a machine-translated PDF (~2.5MB), but nowhere to put it > up. If you have web space for it, please feel free to do so > (assuming that Karen does not object).
I am OK with it if it might be interesting to someone... Karen > Date: Mon, 03 Nov 2014 15:43:47 -0500 > From: Charles Steinmetz <[email protected]> > > Tom wrote: > > >As I understand it, his project is to use the high frequency output > >of a ublox NEO-7M to discipline a MV89 with a James Miller-style analog > PLL. > > * * * > >(perhaps someone can post an English translation for us) > > Tom, > > I have a machine-translated PDF (~2.5MB), but nowhere to put it > up. If you have web space for it, please feel free to do so > (assuming that Karen does not object). > > I have reservations about the potential of any Miller-style GPSDO, > because using an analog PLL essentially guarantees that the crossover > to GPS will be at a tau orders of magnitude lower than it should be > -- the Miller unit crosses over about 3 OOM too low (see attached > plot, from <http://www.leapsecond.com/pages/gpsdo/>). > > The beloved Thunderbolt also crosses over about 2.5 OOM too early, if > you use the factory loop settings (id.). But it has an ADPLL with > adjustable parameters, so a time nut can tune the loop for best > performance with the particular OCXO in the unit. (See > <http://www.ke5fx.com/tbolt.htm>.) > > Best regards, > > Charles > > > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: Miller_GPSDO_ADEV.jpg > Type: image/jpeg > Size: 29695 bytes > Desc: not available > URL: <http://www.febo.com/pipermail/time- > nuts/attachments/20141103/a232b407/attachment.jpg> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > ------------------------------ > > End of time-nuts Digest, Vol 124, Issue 35 > ****************************************** _______________________________________________ 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.
