When we talk about antennas, “line of sight” has been mentioned many times. This only means that, ideally, there is a straight line between the TV antenna and the tower receiving the signal. The goal of practical application is to obtain the smoothest path to the broadcasting tower as far as possible, so as to obtain a better signal.
You may need to elevate and/or move your antenna. Make certain the antenna is not aimed at physical obstacles such as a roof, building, or trees. Also, you should determine what type of antenna you need based on the terrain around your home, your location in relation to the local broadcast towers, and what channels are available in your area. Go to http://www.tvfool.com to find your local transmitter towers and a complete list of channels available in your area. Remember to rescan for channels every time you move your antenna.