Eric,
the whole picture changes when you say the output from the camera is modulated. Of course you can use a diplexer; the DC (maybe even AC?) goes on the DC portion of the SAT side, the UHF goes on the UHF/VHF side.

SOAP BOX TIME: PLEASE PROVIDE US WITH MORE COMPLETE AND ACCURATE INFORMATION THE FIRST TIME (! ! !) SO WE CAN ACTUALLY HELP, NOT JUST TRY TO HELP.

Tom,
I don't understand your question. The answer seems to be your question minus the "how does" :
that integrate(s) into a customer's cable or satellite system so he can just change channels and not have to change inputs on his TV, etc.

With, of course, today's drawbacks: OTS digital channels and digital cable channels can muck up modulated local signals on channels that seem to clear when you view them with a regular TV.

Ernie