Karen wrote:
Mode has been switch from Frequency to TI - result is much better now. It was the main improvement in my measurement.
Your plot shows all traces starting at ~1e-9 at 0.1 second and dropping almost ruler-straight at 10x per decade.
Any real crystal oscillator will flatten out somewhere between 1 second and 100 seconds, typically first to ~square root of 10 per decade, then to 0 per decade, and generally will be on the way back up before 1000 seconds and before getting to 1e-13. (For examples, see <http://leapsecond.com/pages/z3801a-osc/>.)
Also, the fact that there is so little difference between the test oscillators is too unusual to be a coincidence.
It does not appear that you are actually measuring the ADEV of the oscillators you are testing -- you seem to be measuring your test setup.
Best regards, Charles _______________________________________________ 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.
