Didier Juges wrote: > Dr Bruce Griffiths wrote: > >> Using a GPS timing receiver to quantify the long term stability of an >> oscillator whose frequency is not a harmonic of 1Hz, then the technique >> of dividing the oscillator frequency down to 1Hz and logging the time >> delay between the GPS derived PPS pulse and the leading edge of the >> divided down reference frequency will incur several phase wraps during >> the monitoring period. Worse than this if one is using a TIC with a >> finite dead time (eg HP5370A/B) between measurements some the TIC will >> not measure some of these intervals. >> >> These difficulties can be circumvented by using a picket fence technique >> as devised by Greenhall to measuring beat frequencies in the paper: >> >> A Method for Using a Time Interval Counter >> to Measure Frequency Stability >> C. A. Greenhall >> Communications Systems Research Section >> > > >> ... >> >> > > >> Bruce >> >> >> > Bruce, > > I suppose you are referring to this paper? > > http://horology.jpl.nasa.gov/papers/picket_uffc.pdf > > Didier > > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > Didier
Essentially, although the version I downloaded from NTIS had somewhat more detail and was the last paper of a collection of JPL/NASA papers bundled into a single pdf file. Bruce _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts