Does my new Springdale tt have a radio antenna?

I would hope that you have a antenna. If the guy installing the radio put together the wires correctly, that is another story. . .

Check the back of the radio. It should have a large black wire going out of it, with a silver end *typically* and that should connect to the radio antenna. If nothing is connected, then the antenna wire might be in the cabinet someplace, or not installed, that is something that can go wrong with a installation. . .

Good luck, and have fun camping! Enjoy the new RV too!