Satellite connection to 2nd TV

[Gbarnes]

I need a little help with my satellite setup. My RV has two coaxial cable inputs on the outside. Inside the RV, each TV location has a two cable connections to choose from. One cable, one antenna. I have tried running two lines from the dish, one to each of the inputs on the outside of the camper, and hooking each receiver to the satellite connections on the inside. The problem is only the tv in the living room works this way. The TV in the bed room will not get a signal. I'm having to run the second line through the window direct to the box.

Can anyone explain how the 2nd input on the outside of the camper works? I'm trying to not have to run a line through the window to get a signal in the bedroom.

Thanks!