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سؤال 314

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

  1. Multiplex modulation
  2. Phase modulationپاسخ درست
  3. Amplitude modulation
  4. Pulse modulation

توضیح

A variable reactance in an oscillator changes the carrier's instantaneous frequency, but at an RF amplifier stage it changes the phase shift through the stage and therefore produces PM. Indirect FM instead drives a phase modulator with an integrated baseband signal; it is not formed by converting PM in a later stage.

ادامهٔ این آزمون

شروع تمرین
سؤال 314: What emission is produced by a reactance modulator… · FCC General Class (Element 3) · Questena