Television programming is distributed via a Satellite that is 22,300 miles in space. A satellite dish receives signals along with a settop box (satellite receiver). In the US, DishNet and DirecTV are the two major companies offering a subscription service. Both offer an extensive selection of channels and services to view high definition television. (HDTV)
A Satellite Amplifier improves performance from your satellite by boosting the satellite signal when coaxial cable in between the dish and settop box is greater than 150 feet or when connecting multiple settop boxes.