Are you using Bell of Shaw? The new Shaw LNB has 4 out-puts. If you happen to be a "Do It Yourself" person, go to your nearest Box Store and get a double coax input receptacle the same as you likely have where you would normally hook up your cable TV. Then install them near where your PVR is located by drilling two holes in your RV side wall. This is what I did and now I connect the two coax cables directly from the "portable" dish. I also made some changes on the "booster wiring" so that I can send either signals off air TV reception or Satellite to the bedroom TV.
2007 Ram 3500 4x4 SRW 6.7, Air-Lift Air bags
2013 Silverback 33RL, TrailAir Hitch, 4K Onan at the rear
RV usage - 130+ nights per year