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Hotel distribution cable and Live Video Feeds
Posted 27 October 2009 - 02:38 PM
He wants to add in a VCR/Camcorder live feed of his pool area for his customers to watch thier children.
He has tried to do this by hooking up the camcorder to a channel master modulator. He is not succesful it shows a distorted picture due to every channel being used by the cable company. His TV's do not go any higher then 125 so what is he to do to get this live feed setup?
He can not use channel 3 or 4 because those are the local channels his customers want to watch.
Any help on this would be greatly appreciated.
Posted 27 October 2009 - 02:47 PM
In the old analog OTA days, the cable company would put up a computerized "bulletin-board" type channel on the some of the broadcast channel slots to eliminate the ghosting problems. Pre-empting one of these channels is what most motel/apartment building systems do.
Edited by dduensing, 27 October 2009 - 03:04 PM.
Posted 27 October 2009 - 03:02 PM
Even if your system is substantially digital, chances are that at least channels 2-22 are still analog. In my major market, I can delete channels 13 and 16 (city council and public service) to allow me to insert two channels. I have seen cable companies skip one or more channels that overlap FM (97-99), and often times, those channels are clear enough for re-use. You can also delete a shopping channel if you so choose. The cable company won]t like that, but they won't stop you.
Channel elimination filters have to have a pass-band that passes the entire cable spectrum. FWIW, I scoped out a Blonder Tongue single channel elimination filter that was only rated to 750 MHz but had no significant attenuation right up to 860 MHz. On the other hand, if you buy an older elimination filter rated to 550 MHz, it surely willl excessively roll off the higher frequency channels.
Does your company have the expertise to do this professionally? Do you own a spectrum analyzer, do you have relations with the filter manufacturers (Blonder Tongue, Microwave Filter, Pico, Holland)? If so, they can advise you on suitable channel elimination products that they might furnish.
Edited by AntAltMike, 30 October 2009 - 10:05 AM.
Posted 27 October 2009 - 04:37 PM