| frequency modulation n. Abbr. FM The encoding of a carrier wave by variation of its frequency in accordance with an input signal. |
A type of radio signal in which the frequency of the radio wave is varied to carry information from the transmitter to the receiver. (Compare amplitude modulation (AM).)
| frequency modulation
A method of transmitting signals, especially in radio broadcasting, in which the value of the signal is given by the frequency of a high frequency carrier wave. In FM radio transmission, for example, the signal to be carried is a sound wave, and its increasing and decreasing value is reflected in the increasing and decreasing frequency of a radio frequency carrier wave. Compare amplitude modulation. |
Frequency Modulation communications
(FM) A method of encoding data by varying the frequency of a constant amplitude carrier signal.
Contrast Amplitude Modulation.
(2001-04-02)