🚀 go-pugleaf

RetroBBS NetNews Server

Inspired by RockSolid Light RIP Retro Guy

Article View: sci.electronics
Article #10404

Re: A question about the Nyquist theorm

#10404
From: Tom Gray
Date: Mon, 25 Feb 1991 14:49
28 lines
1564 bytes
In article <GREENBA.91Feb21095446@gambia.crd.ge.com> greenba@gambia.crd.ge.com (ben a green) writes:
:In article <4402@eastapps.East.Sun.COM> gsteckel@vergil.East.Sun.COM (Geoff Steckel - Sun BOS Hardware CONTRACTOR) writes:
:
:   In article <883@idacrd.UUCP> mac@idacrd.UUCP (Robert McGwier) writes:
:    From article <6607@healey>, by grayt@Software.Mitel.COM (Tom Gray):
:    > The shape of the wave is preserved within the sampling pulse. This
:    > information allows representation of a signal at exactly 1/2
:    > the Nyquist freqency.
:
:Furthermore, the claim that "the shape of the wave is preserved within the
:smpling pulse" would imply that an analytic signal could be reproduced
:entirely from ONE sample, since all the derivatives of the signal are
:available in the sample. Can't believe Nyquist said that. 
:--

 The claim is that in natural sampling, the wave shape DURING the
sample period is preserved. For example, sampling could take place
with an analog gate.

The sampling technique is

   sample = signal during sampling period
          = 0 ohterwise

No claim of anyother properties were made.


 
Technical Details
Message-ID: <6679@enzo>
Path: arc1-ca.pugleaf.net!utzoo!utgpu!cunews!software.mitel.com!grayt
References: <883@idacrd.UUCP> <4402@eastapps.East.Sun.COM> <GREENBA.91Feb21095446@gambia.crd.ge.com>

Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!cunews!software.mitel.com!grayt
From: grayt@Software.Mitel.COM (Tom Gray)
Newsgroups: sci.electronics
Subject: Re: A question about the Nyquist theorm
Message-ID: <6679@enzo>
Date: 25 Feb 91 14:49:02 GMT
References: <883@idacrd.UUCP> <4402@eastapps.East.Sun.COM> <GREENBA.91Feb21095446@gambia.crd.ge.com>
Distribution: na
Organization: Mitel. Kanata (Ontario). Canada.
Lines: 28