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Satellite TV receivers & systems support forums
Multi-receiver/TV systems - Domestic only
CCTV over coax (multiswitch, triplex plates)
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<blockquote data-quote="Terryl" data-source="post: 941322" data-attributes="member: 369937"><p>If you run multiple TV channels down one coax you will have to watch your channel spacing and frequency's of those channels, this to avoid interference with each other, some modulators ony have TV channels 3 and 4 to work with, there are some that c an put out up to 4 in the UHF band, but if you use the single channel ones you can't use one on TV channel 3 and one on TV channel 4 then combine them, they are too close together to do this, they will cross talk to each other.</p><p></p><p>In CATV land we knew about these problems and the channel combiners we used had harmonic filters and intermod filters to stop this problem, you will not find one in the consumer market for under 15K to do this.</p><p></p><p>So be sure to get a good high quality multi channel modulator to do this.</p><p></p><p></p><p>For analog TV you could get away with one of these hummers.</p><p>[code]http://www.amazon.com/CHANNEL-PLUS-5445-Channel-Modulator/dp/B00026C4GA[/code]</p><p></p><p>But for digital HD signals it's something along this line, multi channel HD modulators are quite expensive right now.</p><p></p><p>[code]http://www.bhphotovideo.com/bnh/controller/home?O=&sku=943679&gclid=CJWKpY7x08cCFZGBfgodrYYMNw&is=REG&m=Y&Q=&A=details[/code]</p></blockquote><p></p>
[QUOTE="Terryl, post: 941322, member: 369937"] If you run multiple TV channels down one coax you will have to watch your channel spacing and frequency's of those channels, this to avoid interference with each other, some modulators ony have TV channels 3 and 4 to work with, there are some that c an put out up to 4 in the UHF band, but if you use the single channel ones you can't use one on TV channel 3 and one on TV channel 4 then combine them, they are too close together to do this, they will cross talk to each other. In CATV land we knew about these problems and the channel combiners we used had harmonic filters and intermod filters to stop this problem, you will not find one in the consumer market for under 15K to do this. So be sure to get a good high quality multi channel modulator to do this. For analog TV you could get away with one of these hummers. [code]http://www.amazon.com/CHANNEL-PLUS-5445-Channel-Modulator/dp/B00026C4GA[/code] But for digital HD signals it's something along this line, multi channel HD modulators are quite expensive right now. [code]http://www.bhphotovideo.com/bnh/controller/home?O=&sku=943679&gclid=CJWKpY7x08cCFZGBfgodrYYMNw&is=REG&m=Y&Q=&A=details[/code] [/QUOTE]
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Satellite TV receivers & systems support forums
Multi-receiver/TV systems - Domestic only
CCTV over coax (multiswitch, triplex plates)
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