[time-nuts] Fast frequency counting question

Bruce Griffiths bruce.griffiths at xtra.co.nz
Sun May 4 18:46:15 EDT 2008

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
Unfortunately the scope sampling jitter isnt anywhere near as low as 
10fs rms.


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