amplitude modulation

views updated May 23 2018

amplitude modulation (AM) Form of radio transmission. Broadcasts on the short-, medium- and long-wave bands are transmitted by amplitude modulation. The sound signals to be transmitted are superimposed on a constant-amplitude radio signal called the carrier or carrier wave. The resulting modulated radio signal varies in amplitude according to the strength of the sound signal. See also frequency modulation (FM)

amplitude modulation

views updated Jun 08 2018

amplitude modulation (AM) See modulation.