When using a TV antenna, you’ll find that scanning for channels is going to be essential. To do this, use the remote for your television and go to the Home or Settings menu.
The tuner needs to be set to Antenna or Air, rather than Cable. The scan tool can then likely be found under Channels or Tuner or something with a similar name.
You then select Auto Scan, Channel Scan, Digital Channel Search. The device will then scan for any available digital OTA channels. The process generally takes a few minutes.