If the antenna is not working as expected, try one of the following:
1.) Check the antenna is correctly connected to the HDTV or 3rd party HD receiver.
2.) Set the mode to Antenna or Air in the TV's setup menu and re-scan for channels.
3.) Antenna signal strength can vary depending on distance from the tower, terrain, and weather. If needed, reposition the antenna in a different location. It is best to place the antenna in line of sight with the TV tower(s) and avoid obstructions. Always re-scan for channels after moving the antenna.
4.) This is an amplified antenna; If a signal cannot be received with the external amplifier, remove the amplifier and try again. In some instances, the amplifier may cause self-oscillation, which may interfere with the signal.