I need to measure ADEV on a source that has spurious sine wave frequency modulation on it. I am looking for a formula that would tell me ADEV, vs FM deviation and carrier frequency. I'm not sure if modulation frequency or tau matter. I am hoping to determine how much I need to clean up the signal order to get down to a particular ADEV measurement threshold.
I tried a literature search but didn't turn up anything I could use. I remember when I worked on the output section of the 5071A we specified 100 kHz and 1 MHz spurs to be down -80 dBc. These didn't seem to affect the ADEV of the 10 MHz outputs, but I can't prove why this should be the case. Does the f-sub-h measurement bandwidth come into play? Thanks. Rick Karlquist N6RK _______________________________________________ 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.