automatic frequency control


Cars & Driving

  • noun the automatic retuning of stations on the FM waveband when subject to drift


  • A circuit which automatically and continuously locks an electronic component onto a chosen frequency. Used, for instance, in TV receivers, radio receivers, and superheterodyne receivers.
  • A circuit that maintains the frequency of an oscillator within precise limits. Also called frequency control (2).
  • acronymAFC

Media Studies

  • noun a control system in a radio or television receiver that keeps it tuned to the incoming signal, even if its frequency varies slightly