Radio Station

Radio broadcasting

Radio broadcasting is the transmission of signals, especially audio, to receivers using radio waves over a wide area. Listeners require a broadcast radio receiver to receive these signals. "Terrestrial" broadcasts come from stations on land, and include AM and FM; and DAB. Audio is also broadcast via satellite in both digital and analog, originating from a satellite in orbit around Earth. Radio stations may produce their own programming or be affiliated with a radio network that provides content either through broadcast syndication or by simulcasting, or both. The most common transmission technologies are analog and digital. Analog radio uses one of two modulation methods: amplitude modulation or frequency modulation. Digital radio stations transmit using one of several digital audio standards, such as DAB, HD Radio, or DRM.

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