> If you are building a GPSDO, then the 1 pps out of the GPSDO should be much > better than the pps out of the GPS.
Bob, That's only true for time scales less than the cross-over point. Beyond that, the 1 PPS from the GPS receiver is actually better (more accurate). That's why the LO is disciplined by GPS, not the other way around. For example, when monitoring the performance of a cesium clock at 1 Hz, there is no need to use a GPSDO -- a sawtooth-corrected 1PPS from a GPS timing receiver is the more accurate way to measure. A GPSDO can only make the quality of the 1PPS worse for tau beyond the crossover point. /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.
