Sounds like you already realized this. Phase is the integral of frequency and the derivative of phase (phase rate) is frequency. So if you go from nominal frequency - slow - nominal or equivalently nominal frequency - fast - nominal the phase integrates up/down.
It would be a little more complicated for an ocxo since it is servoing the xo temperature, you would need to know the disturbance rejection (gain, time constant for a simple Pi controller) to try and feedfoward correct the phase error. On Friday, 4 November 2016, Bob Stewart <b...@evoria.net> wrote: > OK, never mind. I see the obvious. Phase changes faster at a higher > frequency than it does at a lower frequency. > > Bob > ----------------------------------------------------------------- > AE6RV.com > > GFS GPSDO list: > groups.yahoo.com/neo/groups/GFS-GPSDOs/info > > From: Bob Stewart <b...@evoria.net <javascript:;>> > To: Discussion of Precise Time and Frequency Measurement < > time-nuts@febo.com <javascript:;>> > Sent: Friday, November 4, 2016 8:56 PM > Subject: [time-nuts] Thermal impact on OCXO > > In the general case, is the impact of changing the ambient temperature > around an OCXO from, say, 40C to 41C the same as changing it from 41C to > 40C all else being equal? IOW, if I somehow have the same temperature ramp > over the same time period in both directions, will I wind up with the same > frequency and phase, or will the frequency revert but at some phase > difference? > > Bob - AE6RV > ----------------------------------------------------------------- > AE6RV.com > > GFS GPSDO list: > groups.yahoo.com/neo/groups/GFS-GPSDOs/info > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com <javascript:;> > 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 <javascript:;> > 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.