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'[OT]: Combining video signals'
2001\06\19@013937 by John Pearson

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I would like to combine a video camera signal with my CATV so that I can veiw my camera on any TV in the house by selecting a channel, preferrably a channel from  77 to 99. Is there an RF modulator/signal injector product to do this, or any other way to do this?

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2001\06\19@014826 by David VanHorn

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At 10:28 PM 6/18/01 -0700, you wrote:
>I would like to combine a video camera signal with my CATV so that I can
>veiw my camera on any TV in the house by selecting a channel, preferrably
>a channel from  77 to 99. Is there an RF modulator/signal injector product
>to do this, or any other way to do this?

Combining the signals is pretty easy, just use a "splitter" in reverse.

Finding a modulator on those channels will be tricky though.

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have it.

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2001\06\19@020539 by Chris Carr

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>I would like to combine a video camera signal with my CATV so that I can
>veiw my camera on any TV in the house by selecting a channel, preferrably a
>channel from  77 to 99. Is there an RF modulator/signal injector product to
>do this, or any other way to do this?

You have spare RF Channels !!!!!

There is a black box available from CPC http://www.cpc.co.uk called the EZ
Wideband Modulator that does what you want. takes baseband video and audio
and puts it out on a TV Channel that is selected by a push button.
Presumably there is a version available at your location.

Look for a faulty Video Recorder with a Modulator that can be tuned across
the whole UHF TV Band. The synthesiser in these modulators tend to be
controlled by a serial interface such as  I2C so if you go down this path
you end up with a PIC project.

Regards

Chris Carr

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2001\06\19@081623 by t F. Touchton

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There is a device out there called Channel Plus... just installed it in my
house and love it.  Can watch the VCR in any room.  You can set if for any
blank channel.

Didn't have a PIC in it  : (

Scott F. Touchton
1550 Engineering Manager
JDS Uniphase



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I would like to combine a video camera signal with my CATV so that I can
veiw my camera on any TV in the house by selecting a channel, preferrably a
channel from  77 to 99. Is there an RF modulator/signal injector product to
do this, or any other way to do this?

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2001\06\19@101610 by Dale Botkin

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On Mon, 18 Jun 2001, John Pearson wrote:

> I would like to combine a video camera signal with my CATV so that I
> can veiw my camera on any TV in the house by selecting a channel,
> preferrably a channel from 77 to 99. Is there an RF modulator/signal
> injector product to do this, or any other way to do this?

Yes, modulators are available that will allow you to put a video signal on
any CATV channel.  Smarthome.com and many other sources have them.

Dale
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On my desk I have a workstation...

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2001\06\20@172235 by Peter L. Peres

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You need to purchase a video modulator with feedthrough. This is featured
on many home automation newsgroups and websites. If you are into
scrounging you may be able to salvage a suitable module from a VCR. This
takes power on two inputs (about 1W maximum) and video and audio signals
on two more pins. You need some skill to find the specs (5V or 12V and
pinout). The units have a feedin and a feedout 'antenna' type connector
(depends on which country you're in) so you can loop the RF cable through
it. Imho hunt for an older unit, these had a bypass relay that allows RF
to pass through if the system is not energized. They are four times
bulkier than the modern ones (a modern one is slightly larger than a
standard small matchbox). They will also avoid you the surprise of
requiring a microprocessor to program the I2C or SPI modulator chip
inside.

good luck,

Peter

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