); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] > Question: Since you are comparing > TWO oscillators by means of an THIRD oscillator (the tic's time base), > does the tic's time base stability influence your measurement results or > not?
Partly yes, for tau < 1 second. Mostly no, for tau > 1 second. > Clearly so, if you think about it for a while. With this arrangement it > is not possible to decide whether 1pps a or 1pps b or the tic's time > base are responsible if you notice statistical fluctuations in the > measurement results. The measured results will be an statistical average Perhaps I misunderstand your setup, but it seems to the third timebase is only used for a time interval measurement, not the time measurement. Thus the requirements on its stability are much less than the two 1pps sources. Think of it not as a "timebase", but a "time interval base". For example, suppose you want to measure 1pps sources which are within 10 microseconds in phase, to a resolution of 100 ps. To make an ADEV plot for tau 1 second to 1 day, you need to collect days of data, but you only need a TIC timebase that is accurate and stable to one part in ten to the 5th, at tau of 10 us. Any cheap XO will do that, no? You don't need cesium timebases for a 1pps TIC. /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.