[time-nuts] Allan Deviation question

[Bill Dailey]

I am measuring a 10MHz OCXO.  I am wondering about my methods and their
effect of Allan Deviation.

SETUP:

I am running the signal into my radio (gps disciplined)  and taking the
resulting audio and running it to a sound card (oscillator gps disciplined)
then looking at the result in Spectrum lab.  I am using a sample rate of
48kHz and an FFT  length of 32,768 and decimating the signal by 48 to give
me decent resolution.  The resulting FFT window is 32 seconds.  Then
looking at the peak frequency or phase every second (can measure both
instantaneously).

QUESTION:

Does that window time affect my Adev at short time intervals of say 1s to
30s or can these numbers be trusted?

Thanks for your time.  Please save esoteric and playful discussions, just
interested in the ability to trust my measurements.

Doc
KX0O

-- 
Doc

Bill Dailey
KXØO