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- Newsgroups: sci.electronics,rec.video,rec.video.cable-tv
- Path: sparky!uunet!cs.utexas.edu!convex!news.utdallas.edu!corpgate!bnrgate!bmerh85!bcarh472!william
- From: william@bcarh472.NoSubdomain.NoDomain (William Moss)
- Subject: Re: Upconverter or modulator for cable TV freqs
- Message-ID: <1992Jul21.213415.23824@bmerh85.bnr.ca>
- Sender: william@bcarh472 (William Moss)
- Organization: Bell Northern Research, Ottawa, Ontario Canada
- References: <1992Jul21.183246.8595@elroy.jpl.nasa.gov>
- Date: Tue, 21 Jul 92 21:34:15 GMT
- Lines: 36
-
- In article <1992Jul21.183246.8595@elroy.jpl.nasa.gov>, cyamamot@marconi.Jpl.Nasa.Gov (Cliff Yamamoto) writes:
- |> Greetings!
- |>
- |> We have a cable TV descrambler (from the Cable Co of course) and it has both
- |> ch3 and video/audio outputs. The video/audio is used to feed the VCR input
- |> and TV's *SINGLE* video/audio comes from the VCR. We only subscribe to one
- |> of the 8-10 movie/special channels. Currently, there is a A/B switch to
- |> switch the TV input from the box output to the cable drop (since the TV is
- |> cable ready and picks up the basic cable service anyway).
- |>
- |> It is kinda annoying to switch that A/B box all the time. The cable system
- |> runs from ch2 to ch60. The rest are unused. It would be nice to upconvert
- |> the box's ch3 to something above ch60. Or take the video/audio outputs and
- |> modulate it to something above ch60. Is something like this buildable or
- |> available in the market?
- Yes. Several companies (Phillips, Radio Shack) market cable to UHF upconverters,
- in the $20-$30 range. Theyre not so great for the purpose for which they were
- designed (they suffer from intermodulation from alternate channels), but
- they work just fine upconverting the single channel 3 output from a VCR
- or converter.
-
- Just hook one up to the output of your converter, and combine it with the
- cable drop. Depending on your TV tuner type, you'll be able to see the channel
- 3 output somehere in the range of UHF channel 35-40, or cable channel 70-90
- (it depends on how your cable channels are numbered on the TV). You may
- have to do some fiddling on your TV's AFC, since the cable mode channels
- and UHF channel allocations differ by up to 2MHz.)
-
- --
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- William G. Moss disclaimer: not the views of BNR or NT
- Bell-Northern Research Ltd., Ottawa +1 613 763 8108 WILLIAM@BNR.CA
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