The box has two channels; one distributes the DVR and the other whatever you connect. In your case the Dish satellite. Over air TV and campground cable are distributed through the coax cable and are toggled by the push button on the wall plate in same cabinet over the dinette.
I have had seperate problems with dropping signals to TVs. In one case, the port went bad so I unplugged one of the other less used TVs and moved the main tv to that port. For the tvs over the fireplace and the one in the bedroom the HDMI cables were pulled too tight and the connector separated from the end of the cable. The dealer was able to rebuild the cable in the bedroom and I ended up just running a new cable to the other.
Rich and Denise Valkos
US Army (Retired)
Good Sam Club