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 _______________________________________________ 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.
