I have missed a lot and appetite is whetted for more info. I think you have explained why I can get up to 6 different TV “channels” on one transmitter feed when I haul it out of the ether myself with an antenna. You don’t see that with provided TV as in cable or wire based services.
Lurker, you make 5. Get that ticket back. We may be the last men standing for comms someday around SHTF time.