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- Path: sparky!uunet!haven.umd.edu!darwin.sura.net!jvnc.net!rutgers!uwvax!astroatc!vidiot!brown
- From: brown@vidiot.UUCP (Vidiot)
- Newsgroups: rec.video.cable-tv
- Subject: Re: Sharing FM and TV Cable
- Message-ID: <4619@vidiot.UUCP>
- Date: 21 Dec 92 18:17:52 GMT
- References: <168C19856.M02449@mwvm.mitre.org> <1992Dec19.193213.6290@desire.wright.edu> <4614@vidiot.UUCP> <1992Dec21.000237.6699@welchgate.welch.jhu.edu>
- Reply-To: brown@vidiot.UUCP (Vidiot)
- Organization: Vidiot's Hangout
- Lines: 26
-
- In article <1992Dec21.000237.6699@welchgate.welch.jhu.edu> peterli@welchgate.welch.jhu.edu (Peter Li) writes:
- <In article <4614@vidiot.UUCP> brown@vidiot.UUCP (Vidiot) writes:
- <>
- <>The cable-FM frequencies are NEVER the same as the over-the-air frequencies.
- <>Think about it for a moment...yep, that's right, interference. If you put on
- <>cable the same frequency as the over-the-air frequency you can end up with
- <>crap. They will interfere with each other. So, cable-FM always uses a
- <>different frequency. If you notice, you can still pick up the over-the-air
- <>frequency as well as the cable-FM frequency.
- <
- <Another naive question:
- <
- <Why would cable-FM signal interfere with over-the-air signal if the only
- <signal a FM tuner sees is the one from the cable feed ?
- <Of course, I am assuming the cable company keeps its lines 100% shielded
- <so that it won't act as an antenna and let over-the-air signal sneak in.
- <Or is this an improper assumption of cable-tv's line quality ?
-
- Disconnect the feed to your FM tuner, tune in local FM stations. Notice that
- you can still pick them up. That is the reason for the offset in cable FM
- frequencies. There just isn't any shielding worth a damn for FM.
- --
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