[time-nuts] Fast frequency counting question

Luis Cupido cupido at mail.ua.pt
Sun May 4 19:08:07 EDT 2008

Couldn't it be:
digitizing, process the data with a sliding FFT
(making a spectrogram) plus deconvolve
with the system line broadening response,
and if all chirps are equal then repeating
the above N times for resolution increase.

Luis Cupido

Pete wrote:
> Murray,
> I may be out in left field (again), but isn't this
> a textbook measurement for a fast sampling
> 'scope? I think most of the recent devices in
> this category have 500MHz to 10+GHz
> sampling rate, with plenty of memory depth.
> They can output a time record via GPIB, 
> USB or whatever.
> The time record can be post-processed to
> yield actual zero crossings. You also get all
> the amplitude data, which should help with
> analysis.
> Some of the newer 'scopes have the post-
> processing software built in & there is at
> least one source of  PC based timing
> analysis available.
> Pete Rawson
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