The NATL BROADCAST does not transmit ANALOG STATIONS anymore. They switched to DIGITAL HIGH DEFINITION TV SIGNALS a few years back.
When I SCAN in my TV SIGNALS on my HDTV to view they are DIGITAL only showing up.
Just be sure you have gone to your HDTV MENU and have "ANTENNA" SELECTED instead of "CABLE" and then you also must have the ANTENNA PANEL BUTTON PUSHED (LED LIGHT COMES) before you can start SCANNING for digital HDTV signals. You also have to point the BATWING ANTENNA towards the local town that is transmitting the NATL BROADCAST DIGITAL "CLEAR TV" signals. Our BATWING ANTENNA has the DIPOLEs on it like this google photo.
We always get a bunch of HDTV signals just about everywhere we go here on the EAST SIDE of the use. Probably due to more towns to pick from then out WEST.