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Principles of Communication: Frequency Modulation MCQ

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Frequency ModulationMediumQuestion 20281

Question

Pre-emphasis in FM broadcasting means:
  1. A
    Boosting high audio frequencies before transmission
    Correct
  2. B
    Amplifying the carrier before modulation
  3. C
    Using higher transmitter power at night
  4. D
    Pre-coding data for error correction

Correct answer

Boosting high audio frequencies before transmission

Explanation

Pre-emphasis boosts high-frequency audio content (above 2.1 kHz) before FM modulation. The receiver applies de-emphasis (inverse filter) that also reduces high-frequency noise. Net result: better SNR at high frequencies where FM noise is greatest.

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