ALL RV's that have roof top antenna's and a sidewall CABLE inlet, will have a switch between Cable and Antenna. This switch is usually the Roof Antenna wall switch which is also the booster. Since you get OTA signals fine to the TV's that means the booster must either be turned OFF or put in the "Cable" position. Winegard Antenna's, the booster is just switched OFF and then the Cable is routed thru to all TV's. Jensen Antenna's, the switch is a 3 position switch, OFF in the center, and then push 1 way for Roof and the other way for cable. It will have a metal toggle switch. The Winegard will have a push button switch. You DO have a Booster somewhere, you just have to find it. Doug