Article View: sci.electronics
Article #6838Re: TV xmission by VHF radio?
From: Michael A. Covington
Date: Sat, 29 Aug 1992 21:25
Date: Sat, 29 Aug 1992 21:25
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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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<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!mcovingtReferences:
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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