> Tom > > Doesnt that introduce some correlations for larger tau as both the > Thunderbolt and the 58503B are both locked to GPS? > > Bruce
Correct, the choice of reference often has some impact on the plots. Since I used a GPSDO (a nice one), if the plot extended well past 10^4 or 10^5 the GPS correlation effects would show up in the long-term, I think. In that case the plots would start to appear slightly optimistic. On the other hand, because I used a GPSDO instead of a maser reference, the plot I posted appears slightly pessimistic in the short- and mid-term. So the main thing about the plot was just how well the difference between tc=10, 100, 1000 showed up, regardless if the reference was a maser or a GPSDO. A nice Rb might work too. That the TC setting was so visible using (only) a GPSDO as a reference is promising. It means normal time-nuts (oxymoron?) who don't have cesium or masers lying around have a good chance to investigate the optimal TC for their GPSDO. Looks like a 5370 or SR620 would also work for the TI counter. /tvb _______________________________________________ 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.