CCTV on my TV
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Posted by INSPECTOR on November 5, 2007, 1:49 pm
Please log in for more thread options televisions in the house? I have tried to connect it into the cable line using a modulator. This modulator tunes to channels that are not broadcasting cable channels. But the result is a poor picture unless the cable TV line is disconnected. It appears that the signal from the cable TV is still blocking everything else on the line. Do I need some kind of special splitter, filter, etc. TIA for any help you can give. | ||||||||||||||||
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Posted by ren on November 5, 2007, 5:53 pm
Please log in for more thread options no modulator needed then. | ||||||||||||||||
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Posted by mike on November 5, 2007, 8:45 pm
Please log in for more thread options You'll need filter and a splitter. The cable must pass through a filter
that cuts out the frequency of modulated camera signal. Then the two can be mixed together with a standard 2-way splitter. The filters are normally either low-pass, which passes everything lower than the specified cut-off channel, or a notch filter that passes things on both sides of the notch -- centered around your modulator output frequency. To see what type of filters are available: http://www.smarthome.com/_/ProductResults.aspx?Ntt=CATV+filter&x=0&y=0 INSPECTOR wrote: > How can I connect my surveillance camera to my cable which feeds the
> televisions in the house? I have tried to connect it into the cable line > using a modulator. This modulator tunes to channels that are not > broadcasting cable channels. But the result is a poor picture unless the > cable TV line is disconnected. It appears that the signal from the cable TV > is still blocking everything else on the line. > Do I need some kind of special splitter, filter, etc. > TIA for any help you can give. > | ||||||||||||||||
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Posted by INSPECTOR via HomeKB.com on November 6, 2007, 6:34 am
Please log in for more thread options mike wrote:
>You'll need filter and a splitter. The cable must pass through a filter
>that cuts out the frequency of modulated camera signal. Then the two can >be mixed together with a standard 2-way splitter. Thanks again. -- Message posted via HomeKB.com http://www.homekb.com/Uwe/Forums.aspx/home-auto/200711/1 | ||||||||||||||||
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> televisions in the house? I have tried to connect it into the cable line
> using a modulator. This modulator tunes to channels that are not
> broadcasting cable channels. But the result is a poor picture unless the
> cable TV line is disconnected. It appears that the signal from the cable
> TV
> is still blocking everything else on the line.
> Do I need some kind of special splitter, filter, etc.
> TIA for any help you can give.
>