Also Nick Sayers's GPSDO described here https://www.tindie.com/products/nsayer/gps-disciplined-ocxo/ is based on the same design and he has performance data.
On Tue, Mar 19, 2019 at 8:32 PM Jim Harman <j99har...@gmail.com> wrote: > Tobias asked, > @Jim Harman > Indeed I know Lars' GPSDO. Can you tell what performance you achieved with > one of those? > > It is hard for me to quantify the performance because I don't have > anything better to compare it to. The TIC resolution is 1 nsec. > > I can say that it will stay phase locked to the 1 pps from my GPS for > months at a time and if I set the time constant to 1,000 sec, the 300 sec > average error detected by its TIC is within +/- 5 nsec more than 50% of the > time. The maximum error is about 100 nsec. > > If I compare the variations in the TIC error from one day to the next, I > can easily see variations of about +/- 20 nsec on a period of just less > than 24 hours caused by the shifting geometry of the satellites overhead. I > am sure this could be improved significantly if I used a a timing-type GPS > instead of the Adafruit one I have. > > Lars may have better data in his write-up, > >> -- >> > > --Jim Harman > > -- --Jim Harman _______________________________________________ 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.
