Mark, All GPSDO "remove that contribution to timing error" by virtue of the quartz "fly-wheel". I think David was asking about GPS timing receivers, not full-blown GPSDO. Yes, I agree the Thunderbolt is a very nice GPSDO.
/tvb ----- Original Message ----- From: "Mark Sims" <[email protected]> To: <[email protected]> Sent: Tuesday, October 02, 2012 12:50 PM Subject: [time-nuts] Best counter setting for ADEV? > > No, the Thunderbolt does it and it works beatutifully. The GPS receiver > clock is derived from the 10 MHz oscillator. Voila, no messy sawtooth > corrections to deal with. > > The Thunderbolt is a VERY user/hacker friendly design. Even if I were silly > enough to build my own GPSDO, I'd still use a Thunderbolt as a base. It > has the EFC dac, phase comparator, and temperature monitoring already > implemented. Plus no sawtooth correction crap to handle. You can control > the DAC manually and implement your own control loop. Opps, siilly me, > been there, done that. Lady Heather does have an implementation of an > alternate disciplining algorithm in it. > ---------------------- > I assume there is a design compromise that prevents economically phase > locking the GPS receiver clock to the GPS signal to remove that > contribution to timing error. _______________________________________________ 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.
