There have been a lot of questions regarding the installation of the various entertainment components in your trailer. I've made a one line schematic of the way that I set up my systems.
The end device, for the all this, is the television with the AM/FM Stereo as an adjunct. The three inputs are from the Batwing antenna, Cable TV and the Satellite dish. The Batwing and CATV signals go into the Antenna amplier. One output of the Antenna amp is goes to the bedroom outlet. The other output is connected to a cable spitter with one feed going to the input of the AM/FM Stereo radio and CD/DVD player and the other feed going to the input of the Digital Television Converter. The output of the DTV converter is connected to coax input of the television. If your Satellite box has an antenna input, then you could daisy-chain the boxes together by connecting the DTV box coax output to the satellite box antenna input and then connect the satellite box coax output to the television. ( see the dotted line on the schematic) My Satellite box does not have that facility so I had to use its Audio/Video output and connected into Video 2 on the television. I similarly connected my DVD player to Video 1 on the television.