I don't know which Motosat you have, Executive or HD? I still have two RCA receivers run both at the same time in my motorhome and they work fine. I had the Executive for 10 years with very few problems. When I got my 2007 I put in the Motosat HD and had nothing but problems. I had different people work on it and would never work right. It would try to find a satellite looking at trees. It would have clear view and still could not find a satellite. Got tired of having to set up a portable dish.
Finally got it tired of it and spending money on it. Replaced it with a Wineguard Traveler and works great and much faster with my 2 old RCA receivers and can upgrade to HD without any changes.
2007 Apex MDTS (425 hp) #75723
2007 Toyota 4-Runner
2014 Ram Laramie 3500