[time-nuts] Fast frequency counting question
jmiles at pop.net
Sun May 4 20:38:09 EDT 2008
> Probably impractical as the sampling noise is so high that it will
> require tens of thousands of measurements to get the noise down to the
> required level and meanwhile the temperature etc will have changed
Heh, that's a good point, you can't just sit there and trigger the thing
10,000 times per second for 24 hours...
> Also the relatively low ADC resolution and nonlinearities
> will tend to limit the effective resolution in determining the zero
> crossing locations.
I stand by my assertion, though, that all you're going to get with high
sampling precision is a lot of well-characterized random noise determined
almost solely by outside factors. It's an interesting question, but one
that can't be answered without knowing more about the symptom that started
the whole thread.
-- john, KE5FX
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