Hi The gotcha of using a telecom Rb is that it (probably) has a worse ADEV than a good GPSDO out to somewhere in the 100 second range. It also (probably) isn’t going to do much good in the > 20,000 seconds range either.
Much easier to just build two or three GPSDO’s…. at least then you can compare out to their loop bandwidth. Bob On Sep 2, 2014, at 4:46 PM, Bob Stewart <b...@evoria.net> wrote: > Hi Magnus, > > I knew I was missing something! I'll warm up the Rb and test against that > again. > > Thanks! > > > Bob > > > > ________________________________ > From: Magnus Danielson <mag...@rubidium.dyndns.org> > To: time-nuts@febo.com > Sent: Tuesday, September 2, 2014 3:27 PM > Subject: Re: [time-nuts] OCXO Phase Noise Measurement in Primitive Conditions > > > Well, in that case you do measure a form of noise-floor rather than > measuring the OCXO performance, as OCXO performance is being corrected > out in the PPS position (and sawtooth-correction). > > If you want to measure that OCXO performance, you need to do that > against an independent PPS. > > Cheers, > Magnus > _______________________________________________ > 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. _______________________________________________ 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.
