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- Newsgroups: rec.video.cable-tv
- Path: sparky!uunet!spool.mu.edu!agate!ames!pacbell.com!unet!loren!larson
- From: larson@loren.net.com (Alan Larson)
- Subject: Re: Sharing FM and TV Cable
- Message-ID: <1992Dec23.055654.4778@unet.net.com>
- Sender: news@unet.net.com
- Nntp-Posting-Host: loren
- Organization: none
- References: <4614@vidiot.UUCP> <1992Dec21.000237.6699@welchgate.welch.jhu.edu> <4619@vidiot.UUCP>
- Date: Wed, 23 Dec 1992 05:56:54 GMT
- Lines: 19
-
- In article <4619@vidiot.UUCP> brown@vidiot.UUCP (Vidiot) writes:
-
- >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.
-
- Of course, the same is true of TV. While 20 dB isolation will provide
- a pretty good capture with FM, it will be ghost city for TV.
-
- The actual test should be to terminate the input of the FM receiver
- with the proper impedance (300 or 75 ohms), as the short segment of
- cable inside is acting as an antenna if unterminated.
-
- In areas like this one, I doubt that one could find enough unused
- FM channels to move the stations to relocate them all. I never tried
- to get FM from the cable when I had it briefly from Palo Alto, but
- I had thought it was on the same frequencies.
-
- Alan
-