the first thing to make sure is that you have a digital TV or a digital converter if not. assuming you have that, since it worked in another RV. there should be a Antenna booster located in the RV somewhere, usually in the bedroom.
Most airlines in the United States, including American, Delta and United, allow carry-on bags that are no more than 22 inches long, 14 inches wide and nine inches high. Southwest and JetBlue accept a more generous 24 inches by 16 inches by 10 inches, and JetBlue even adds a couple more inches for cabin bags flying on its Airbus A320 planes.
1. Understand the carry-on limits for Delta baggage. The airline allows one Delta carry-on baggage that must be no bigger than 22 x 14 x 9 inches. There is NO weight restriction for most routes with your carry-on so you can be strategic about how you pack. Avoid packing any bulky items, and use accessories to your advantage.