frequency modulator - a modulator which varies the frequency of a carrier according to the information-bearing parameter of the modulating signal, generally its amplitude, thus producing a frequency-m, modulate - to vary a carrier wave. Modulation blends a data signal (text, voice, etc.) into a carrier for transmission over a network. The most common methods are (1) amplitude modulation (AM), which , modulatsioon - raadio- ja traatsidetehnikas nimet. modulatsiooniks kõrgsageduslike elektrivõnkumiste (kandesagedus) või impulsijadade mingi parameetri (amplituudi, sageduse, impulsi laiuse) muutmist t