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Article #6838

Re: TV xmission by VHF radio?

#6838
From: Michael A. Covington
Date: Sat, 29 Aug 1992 21:25
22 lines
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In article <1992Aug29.192830.844@ddsw1.mcs.com> whos@ddsw1.mcs.com (Ben Feen) writes:
>Here's a scenario:
>A VCR's Video line out is connected to the mic input of a VHF radio xmitter.
>A short distance away, a scanner has its earphone output connected to a VCR's
>video input.
>
>Would this work, and if not, why not?

No; inadequate bandwidth.  The frequency ranges needed for various kinds
of signals are:
         Sound (telephone quality)    300 Hz to 3000 Hz
         Sound (high fidelity)        20 Hz to 20,000 Hz
         Television (low quality)     10 Hz to 2,000,000 Hz (2 MHz)
         Television (US broadcast)    10 Hz to 6,000,000 Hz (6 MHz)
         Thinwire Ethernet            something low to 10,000,000 Hz (I think)

Now you know what bandwidth means: it's the width of the band of frequencies
that must be passed in order to reproduce a signal faithfully.
-- 
+ Michael Covington - Artificial Intelligence Programs - U of Georgia - USA 
+ Unless otherwise noted, these are private opinions, not official statements.
+ VOTE NO GEORGIA LOTTERY - we need not imitate mistakes of other states.
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Message-ID: <1992Aug29.212553.10516@athena.cs.uga.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!van-bc!rsoft!agate!ames!haven.umd.edu!darwin.sura.net!europa.asd.contel.com!emory!athena.cs.uga.edu!mcovingt
References: <1992Aug29.192830.844@ddsw1.mcs.com>

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Path: arc1-ca.pugleaf.net!sparky!uunet!van-bc!rsoft!agate!ames!haven.umd.edu!darwin.sura.net!europa.asd.contel.com!emory!athena.cs.uga.edu!mcovingt
From: mcovingt@athena.cs.uga.edu (Michael A. Covington)
Newsgroups: sci.electronics
Subject: Re: TV xmission by VHF radio?
Summary: No; it's a matter of bandwidth.
Message-ID: <1992Aug29.212553.10516@athena.cs.uga.edu>
Date: 29 Aug 92 21:25:53 GMT
References: <1992Aug29.192830.844@ddsw1.mcs.com>
Organization: University of Georgia, Athens
Lines: 22