I'm going to take a wild guess here.
I'm guessing when you scan for channels in antenna mode (not cable mode), you are getting a report of 80 RF channels. All over the air channels are RF. So it sounds like your antenna is functioning correctly. The problem that you are not seeing a picture may be that you have your TV set to the wrong input source - the choices would be something like HDMI, composite, DVD player, and antenna. You'd want to make sure the input selected is antenna.
If this is not the answer, post back with your TV settings -- likely someone here will have the answer.
There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.
2011 Jayco 28.5RLS; 2008 Chevy Duramax; Pullrite Superglide Hitch