Hi Sheldon,
Welcome to the Heartland Owners Forum and Family. We have a great bunch of people here with lots of information and all willing to help when needed.
First, do you have the amp turned on? This must be turned on to get reception from the TV antenna. It should be in the bedroom near where the TV is, or would be. It has a little button that turns on a little red light, along with a cable connector on it also.
Your dealer should have explained all this during the PDI and made sure of the operation of everything for you.
I am moving this thread to a better area for you also.
Enjoy the forum and your new unit.
Jim M