AMPLITUDE MODULATION
Amplitude Modulation, AM, is used when a signal, (usually an RF signal) is transmitted carrying low frequency information. The low frequency signal modulates -(changes) the amplitude of the RF signal, and is recovered (detected) at the receivers end. Video information that is transmitted on the air as TV transmission employs this system. Some radio stations use it also (AM Broadcast), although the superior FM system dominates radio transmissions.
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