[ntp:questions] Accuracy of audio tones via VOIP
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Null at BlackList.Anitech-Systems.invalid
Wed Jul 10 03:11:27 UTC 2013
Robert Scott wrote:
> I am not interested in time. I am talking about frequency.
Then you might be asking the wrong newsgroup?
> If you call 1-303-499-7111 you will hear the audio that is
> transmitted on WWV, which includes 500 Hz and 600 Hz tones.
> As transmitted these tones are as accurate as NIST can
> make them.
> But as received they might appear at a different frequency.
I you are as concerned as you seem to be, why not measure it?,
Do a FFT analysis, look for frequency shift, harmonics, ... ?
Try to sync it up with your a frequency generator at your end,
and compare the two, watching for phase shift, ... ?
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