Re: [rtl] Release 9F Problems...

[Kurt Rosenfeld <hardware@ees1s0.engr.ccny.cuny.edu>]

On Fri, 2 Oct 1998, Donald Gaffney wrote:
I don't
> know how good the FFT gizmo is on this scope, I may need a real analyzer
> to do this - as the digital storage shows the trace is not really
> stationary - won't that mess up an FFT?

It won't mess up an FFT as long as the window includes many pseudo-periods 
worth of the sampled signal.  Perhaps, the representation that would be 
most meaningful to people (personally I do robotics) would be the 
probability density function of the time between one rising edge and the 
next rising edge.  I think that the FFT would give, for comparison 
purposes, the same information; a tight first peak corresponding to a tight 
PDF.  This issue is the essence of why we are all interested in RTLinux, 
isn't it?  -kr
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