Note:
If you are using a flat screen HDTV, please check your TV's manual to make sure your TV has a built-in tuner for receiving over-the-air broadcasts.
You should retune your TV and digital box from time to time to ensure you are receiving all available services. Retuning takes only a few minutes and can be done with your remote control.
Make sure your tuner can receive HD signals, otherwise you won't be able to receive and watch HD channels. When you buy it before, pls find out what channels are available in your area.
Signal quality determines the number of channels you can get, and image quality. Try to move your antenna and Re-scan TV channels to find the best location signal. When you re-scan for channels after moving the antenna.
The number of channels you get is determined by what's being broadcast in your area, how far away you are from the towers, and your surroundings.Areas with large obstructions such in valleys, mountains, buildings, etc will reduce effective range.