I will assume that all connections to the box of many buttons are correct and that your bat wing antenna is deployed and has been adjusted to the proper direction to receive signals. On the front panel of the "box" make certain that the Power ON button is pressed. Also check to see if the buttons for TV Ant are pushed in for Main TV and TV2.
Turn the TV's on and make certain that they are both set to receive signals from AIR
You indicate that you have digital converters. Make certain that the converters are on. You will need to run a the Setup menu on the converter. Find the section that must be used to SCAN for a signal.
If the antenna is pointed in the proper position and all wiring is connected properly your converters should be receiving signals.
The main thing to remember is that you will need to run the converter setup every time you move your RV.
I hope this helps.