Re: CCTV on my TV

[mike <ki4fyy@xxxxxxxxx>]

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.
>