Hi Use the Rb as your reference and log the time offset of its PPS. Manually steer vs a 10 hour GPS PPS data set once a week. You probably will stretch it out to a couple weeks after things settle in.
More or less: PPS starts at some offset. Call that zero. As the days go along: PPS goes positive = your frequency is high. PPS goes negative = your frequency is low. A week later, look at the PPS relative to your zero. Do the math to work out the frequency offset. Measure frequency against the GPS with the TICC with maybe a 1,000 second gate time Adjust the frequency by the required offset. Log the final PPS offset and use it as the new zero. There are a lot of other ways to do it, but the technique above does work. An alternative is to monitor the EFC on the Rb and assume it has a constant slope. With a digitally tuned Rb, this all is “free”. Bob > On Jan 1, 2019, at 10:56 PM, Chris Burford <cburfo...@austin.rr.com> wrote: > > I have a situation in which I have access to a GPSDO 10MHz source but for > only about 10-12 hours at a time. My current residence does not allow a > permanent GPS antenna therefore I am limited in its use. > > I do realise that the long term stability of the GPSDO is somewhat superior > to a Rubidium source. I'm planning on using my TICC to validate both my GPSDO > and RFS. I'm aware that such a short "power on" period is somewhat > counterproductive but I have no other options. I'd like to know if a 6-8 hour > window for the GPSDO is sufficient for use as a 10MHz source for the TICC. > > I appreciate any and all comments. > > Regards, > > Chris > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
