Tom Duckworth wrote: > Antonio, > > Absolutely! With a good XTAL you have parts in the 9th, short term. With a > XTAL controlled by a Rubidium, in the phase-lock feedback loop, you have > parts in the 12th, short term. With the Rubidium disciplined by the GPS, > with its on-board Rubidium/Cesium oscillators updated from the ground every > orbit, you have parts in the 14th, short term. In other words, your > XTAL/Rubidium/GPS has an effective short-term Allen variance equivalent to a > good Cesium; and better than a single Cesium, long term, for a lot less > money!
You didn't mention the case of GPS disciplined XTAL. As far as I understand (unless I'm missing something), the Allan variance in the two cases (GPS-Rb-XTAL and GPS-XTAL) would be similar. Isn't it? The holdover (as answered by David) is another issue, and I was not referring to it with my question. Thanks, Antonio I8IOV _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
