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.
Maximum dimensions for your carry-on bag by airline: 1  United Airlines : 9 inches x 14 inches x 22 inches (22 cm x 35 cm x 56 cm), including handles and wheels. 2  American Airlines: 22 inches x 14 inches x 9 inches / 23 x 36 x 56 centimeters (including handles and wheels) (may not exceed 45 linear inches)