[time-nuts] Estimating phase noise of sampling clock

[Jim Lux]

If one has a digitized sample (of TBD length) of a "good" sine wave, has someone got a cookbook way to get the phase noise and/or Allan deviation of the sampling process (mostly dominated by the sample clock oscillator, but potentially other noise sources)?

I can do something like break the samples into shorter chunks, fit a sine wave to the sampled data. Use the frequency (or phase) of those measurements as input to a AVAR calculation, for instance.

Typical samples would be at 2.048 MHz for 2-10 seconds (so not particularly useful for AVAR, to be fair)

Jim