I realise that SAT is digital and that analog Cable is NTSC compatible.

None of this explains to me why the signal sources that Time Warner cable gets from OTA antennas, download from satellite which could be on different transponders, or land line links from affiliates are combined at the Time Warner Cable facility and than are sent along on one coax line where paying consumers can receive the NTSC analog signal on any NTSC tuner equipted TV in their house.

Bottom line is how does Time Warner cable merge all these varied signal sources into one coax line ?

Is it just a matter of dollars and it costs a lot of money to combine all these signals and put them out on analog NTSC coax?

-Don B