Congratulations on your new coach!
All new Tiffins come with the stationary satellite which, according to what I have read, you cannot convert to in-motion. What people are doing is having Tiffin put the Winegard wiring in and then buying the actual satellite unit itself themselves. Go to www.tiffinrvnetwork.com
if you haven't already joined and ask your question there. There are satellite gurus who will answer you for sure.