en

frequency modulator

1

Terminological databases

EKI terminibaas Esterm

ID 722309 Last modified 30.12.2004
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Domain networks - basic circuits - basic systems
  • modulatsioon - raadio- ja traatsidetehnikas nimet. modulatsiooniks kõrgsageduslike elektrivõnkumiste (kandesagedus) või impulsijadade mingi parameetri (amplituudi, sageduse, impulsi laiuse) muutmist tunduvalt madalama sagedusega signaali (moduleeriva signaali) rütmis ... Moduleerimiseks kasutatavad seadmed - modulaatorid - on elektriahelad, mis sisaldavad muudetavate parameetritega elemente (nt süsimikrofoni, fototakistit, mahtuvusdioodi), mida kasutatakse parameetri muutumise lineaarses alas ja tüüritakse moduleeriva signaaliga.
  • 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-modulated wave of constant amplitude
  • 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 modulates the height of the carrier wave, (2) frequency modulation (FM), which modulates the frequency of the wave, and (3) phase modulation (PM), which modulates the polarity of the wave. Contrast with demodulate.
frequency module preferred
Usage examples
  • The components of 'radio conferencing apparatus' not presented together for retail sale in a single package consisting of: a) a transmitter microphone comprising a highly sensitive transmitting device for radio communication with a built-in microphone, and aerial; and b) one or more receivers comprising receiving devices for radio communication with frequency module and socket for connection to a hearing aid, whether or not incorporating a directional microphone.
Frequenzmodul

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