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From: spencer@oberon.UUCP (Randy Spencer)
Newsgroups: net.video
Subject: Re: MTS and Cable T.V. questions, comments
Message-ID: <179@oberon.UUCP>
Date: Sun, 12-Jan-86 04:10:49 EST
Article-I.D.: oberon.179
Posted: Sun Jan 12 04:10:49 1986
Date-Received: Tue, 14-Jan-86 05:09:01 EST
References: <19@valid.UUCP>
Distribution: net
Organization: U. of So. Calif., Los Angeles
Lines: 39

> According to everything I have read, cable does not have the bandwidth for
> carrying MTS signals.  However, when I tune in to channels 4 and 20 (which
> both broadcast in stereo, 4 is network, 20 is independent) the "stereo"
> light on my Sony SL-HF400 VCR comes on, the LEDs show a difference between
> the left and right channel, and I can hear the stereo effect.  Channel
> -Pete Zakel (..!{hplabs,amd}!pesnta!valid!pete)

The reason that it is said that there is no bandwidth in cable to broadcast
stereo is because of the way the channels have been set up.

When channels 2-13 and 14-83 were originally assigned frequencies they were
given, by todays standards pleanty of guardband.  When television started 
out the equipment was just not a precise as we make it today.  As time
went on however we ended up with television equipment able to do the job
much better and with much less guard between different stations.  Then 
came cable television.  They were looking to put even more channels out there
than there already were so that there would be no conflict with exhisting 
ones.  The went up the frequency scale but after a while you are not
talking electro magnetic any more, eventually you get into micro waves and
the Light!  They went to pack the new channels together (those above 83).
When they were done they had a new standard that television makers could
create tuners for.

Well, along comes stereo AM and the next step is TV in stereo, heck, we
don't need all that bandwidth, we will devote all that we can to getting
the sound across.  Great plan.. only for as long as cable keeps the channels
the way that they are they will never be sending MTV out to our MTS tuners.

However this does not limit the way that you receive broadcast channels, 
they are just passed on to you in the original form (easily discovered
by connecting the TV w/o the cable box).  Thus any channels 2-83 that
broadcast in stereo in your area *will* make it to your house that way.


==============================================================================
Randal Spencer      Student DEC Consulting - University of Southern California
Home: 937 N. Beverly Glen Bl. Bel Air California 90077          (213) 470-0428
Arpa: Spencer@USC-ECL  or  Spencer@USC-Oberon          Bitnet: Spencer@USCVAXQ
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