Re: Energy within a Digitized Pulse

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Article #164

#164

From: David Kastrup
Date: Thu, 30 Jul 1992 16:05

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gingell@aurs01.UUCP (Mike Gingell) writes:

>There is of course NO energy in a DIGITIZED pulse since it is purely
>numeric.  Energy is only meaningful if you translate it back to the
>real world and assume a smooth curve drawn through the numbers,
>representing a given voltage in a given impedance for a given amount
>of time.

>Am I a pedant or what? :-)

>Mike Gingell, Alcatel, Raleigh, NC USA  (919) 850-6444
>UUCP:       ...!mcnc!aurgate!aurfs1!gingell
>Internet:   gingell%aurfs1%aurgate@mcnc.org
Usually you interpret the digital values as Dirac pulses with the appropriate
amplitude. The energy of a single such pulse is infinite. However,
the digitized pulses are lowpass-filtered before reproduction, thus achieving
finite energy again. Without this filtering (even if obly in theory or
conceptional) energy cannot be calculated.

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References: <15498@ucdavis.ucdavis.edu> <TeNmoB1w164w@gmp.lonestar.org> <15598@ucdavis.ucdavis.edu> <60983@aurs01.UUCP>

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Path: arc1-ca.pugleaf.net!sparky!uunet!usc!wupost!darwin.sura.net!Sirius.dfn.de!Urmel.Informatik.RWTH-Aachen.DE!tabaqui!dak
From: dak@tabaqui.informatik.rwth-aachen.de (David Kastrup)
Subject: Re: Energy within a Digitized Pulse
Message-ID: <dak.712512304@tabaqui>
Keywords: Attenuation, Energy, :-)
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Date: 30 Jul 92 16:05:04 GMT
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