Originally Posted by Tilagil
We have a Quest QSE3E
Google says no such thing. Are you sure it's not a QS53E?
In any case, this is a coaxial cable switchbox, it routes coaxial cable inputs to TV inputs except for 1 AV input which can be modulated and sent to TVs on channel 3 or 4 just like you had to watch the original VHS and DVD players.
You should now know where to connect your CableTV on the outside of the RV.
No need to worry about OTA Antenna Power switch being on or off as with this system the Antenna signal is completely separated from the Cable signal by the box.
Select the TV output of concern to use CableTV
On the TV you will need to go into the menu and select Cable as the input (not Antenna) and then scan for channels - this is assuming you have a TV with a cable digital tuner (finds channels like 12.1 or 13-2. not just 2 through 15 and 15 through 121) and the cable input is not encrypted, which will require a box from the cable company.