Hi
> On Oct 22, 2014, at 5:57 PM, Hal Murray <[email protected]> wrote: > > > [email protected] said: >> 2) For long-term analysis, even 1 PPS is overkill. Having more data may not >> improve your oscillator drift plot at all. This is because the frequency is >> a moving target. Ever more precise measurements of a moving target are >> wasted; they don't add any clarity to the overall trend. Consider measuring >> a 10811 for a year. Do you need to follow its phase or frequency every 100 >> ns? Or second? Or minute? Maybe as little as one data point per day is more >> than enough to make a perfectly accurate long-term frequency drift plot. > > You need more than 1 sample per day for ADEV plots left of 100,000 K seconds. > > Suppose you have lots and lots of data at, say, 1 second samples. You can > turn that into an ADEV plot. Does anybody scan the data in clumps, say a > day, to see if the short-tau picture changes over time? ADEV most certainly does change with time, even for short tau’s. Bob > > > -- > These are my opinions. I hate spam. > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
