The simple fact is the satellite dish will work just fine with coax runs over 50 feet.. my house has a run of 250 feet from dish to receiver..
I use the King Quest direct tv auto dish with my fifth wheel and coax to connect so I can place antenna in clearings thru trees to get signal sometimes when boon dock8ng.. that coax run is 150 feet
The key to a good dish system in an RV is quality RG6 coax with properly installed F connectors...
Also you cannot feed a signal from a satellite antenna thru a conventional every day tv cable splitter... it simply will not work..ever..
The LNB on the dish antenna needs to see power from the coax and with a conventional Wally World or RV style tv splitter it can’t get the power needed ....
That is why the preferred coax run is Quality RG6 coax... a SWM powered splitter can be used however....
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