By coach distribution I mean the pre wired TV signal distribution built into your coach. That comprises the antenna to the front power supply/signal outlet to the rear signal outlet to the outside cable in connection. Because the standard Winegard antenna uses 12V DC from the front power supply to operate the antenna mounted amplifier the circuit is built with voltage isolator. When using the antenna you normally turn on the power supply. When using cable you normally turn the power supply off to prevent the two signals from interfering with each other. In order to use a satellite mounted off the coach you will need to install a connection into the coach separate from the built in system to isolate the voltage the satellite system uses from the voltage the TV system uses. This is normally done by installing a new coax cable fitting through the wall or floor near where the TV & satellite receiver are located