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From: lauren@vortex.UUCP (Lauren Weinstein)
Newsgroups: net.video
Subject: Re: Noisy Cable (or is the VCR the culprit)?
Message-ID: <603@vortex.UUCP>
Date: Wed, 13-Mar-85 10:10:16 EST
Article-I.D.: vortex.603
Posted: Wed Mar 13 10:10:16 1985
Date-Received: Fri, 15-Mar-85 03:18:08 EST
References: <1829@sdcrdcf.UUCP>
Organization: Vortex Technology, Los Angeles
Lines: 16

Two points:

1) Many VCR tuners do not have adequate filtering to directly
   demodulate cable signals without adjacent channel interference
   problems.  You need to feed through a cable converter in such
   cases.

2) The loud hissing (buzzing) noise on subtitles, information
   channels, etc. indicates that the signal input level is too
   high into the VCR tuner, and that as a consequence the video
   is bleeding over into the audio subcarrier (simplified
   explanation).  Sometimes slight detuning will help, with some
   loss of video quality.  RF attenuators may also be useful
   to cut down on overly strong signals in some cases.

--Lauren--