From: Mike Jenkins ([email protected])
Date: Tue Apr 03 2001 - 12:53:43 PDT
Thomas Jackson wrote:
> There are an infinite number of periodic, band-limited signals; they just
> don't have discontinuities like square, trapezoid, sawtooth, etc. do. In
> other words, you can't get them directly out of a function generator.
However, with a band-limited signal, you can get ARBITRARILY
CLOSE approximations. On a scope screen, one probably could
not distinguish a perfect sawtooth from a waveform comprised
of the first, say, five Fourier components.
> -----Original Message-----
> From: AA [mailto:[email protected]]
> Sent: Monday, April 02, 2001 4:24 PM
> To: Ken Cantrell; Thomas Jackson; [email protected]
> Subject: RE: [SI-LIST] : Nyquist Sampling Rate
> Thanks all for responding to my inquiry on the Nyquest
> sampling rate. I guess the important take away is that
> this sampling theory applies only to a true sine
> waveform signal not "Periodic Signals" as I mentioned
> in my first mail. I always remembered Fourier series
> form my freshman year but did not establish the mental
> correlation between "periodic" and "band limited".
> I appreciate all you input.
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