Frequency modulation (FM)

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5-3-030

Angle modulation of a sine-wave carrier in which the instantaneous frequency of the modulated wave differs from the carrier frequency by an amount proportional to the instantaneous value of the modulating wave.

Reference: I.E.C. (modified)




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

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International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM

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