Commercial applications of antennas range to transmission and receiving AF and RF signals in television sets. TV Antennas or Television Antennas are manufactured in wide varieties for use in many consumer electronic appliances and are available in variety of configurations for different applications. Short-wave antenna is suitable for a wide range of short wave, medium wave and long wave listening applications. The main factors determining reception are the distance and direction from the TV station transmitters to home. Other factors affect TV antennas include the transmitter's power and the height of its tower, the terrain between the tower and your antenna, and the size and location of any large buildings in the path of the transmission. Uni-directional TV Antennas are designed to receive signals from one direction. Multi-directional TV antennas are able to receive signals from all directions. Uni-directional TV antennas are able to pull in signals from greater distances, and because they see in only one direction they are resistant to noise and multipath distortion (a problem created when an antenna receives reflections of the desired signal). Because multi-directional TV antennas see in many directions they are more likely to pick up noise, interference, and multipath distortion. Indoor TV antennas are generally small, designed to be placed on or near your TV. Outdoor TV antennas tend to be significantly larger and are intended for roof- or attic-mounting. In general, the larger an antenna's surface area is, the stronger the signal it will provide. The relative strength of the signal an antenna can deliver to a tuner is referred to as gain and is measured in decibels (dB). The higher the dB rating, the greater the gain. Nearly all outdoor TV antennas perform better than even the best indoor TV antennas.