Transmitters

FM [F3E] (1)

  • Frequency Modulation
  • Deviation of carrier output frequency is proportional to amplitude of modulating signal.  Amplitude of carrier constant
  • Amateurs use narrow band FM (NBFM) — audio BW 2.8 – 3kHz and deviation 2.5kHz, giving a signal bandwidth of approximately 11kHz
  • Transmission duty cycle 100%