Here is a previous post of mine concerning TV connections. Since making changes I don't use the installed TV antenna unless I have too. I take along a small HD antenna and put it on an 8 ft pole connecting to the outsside cable in. By comparison at the same campground, that roof saucer 7 HD channles, mine on a pole 57 HD channels.
2013 F150 5.0
2011 Harley Touring