frequency modulation

noun, Electronics, Radio.
1.
FM.
Origin
1920-25
Examples from the web for frequency modulation
  • FM is short for frequency modulation, which refers to the means of encoding the audio signal on the carrier frequency.
British Dictionary definitions for frequency modulation

frequency modulation

noun
1.
a method of transmitting information using a radio-frequency carrier wave. The frequency of the carrier wave is varied in accordance with the amplitude and polarity of the input signal, the amplitude of the carrier remaining unchanged FM Compare amplitude modulation
frequency modulation in Science
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 in Culture
frequency modulation (FM)

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 in Technology

communications
(FM) A method of encoding data by varying the frequency of a constant amplitude carrier signal.
Contrast Amplitude Modulation.
(2001-04-02)