Frequency Modulation Overview
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Questions and Answers

What remains constant during the frequency modulation process?

  • The frequency deviation
  • The frequency of the modulated signal
  • The amplitude of the carrier signal (correct)
  • The frequency of the modulating signal
  • What happens to the frequency of the modulated signal when the modulating signal reaches its positive peak?

  • It decreases to a minimum
  • It remains unchanged
  • It exceeds the center frequency (correct)
  • It becomes negative
  • Which signal is characterized by a high frequency and constant amplitude?

  • The carrier signal (correct)
  • The modulated signal
  • The message signal
  • The deviation signal
  • What does the frequency deviation represent in frequency modulation?

    <p>The change in frequency from the center frequency</p> Signup and view all the answers

    What type of wave is the message signal in frequency modulation?

    <p>Sine wave</p> Signup and view all the answers

    When the modulating signal is at its trough, what is the frequency of the frequency modulated signal?

    <p>It is at its minimum</p> Signup and view all the answers

    In the context of frequency modulation, what characteristic does the frequency modulated signal display with time?

    <p>It varies in response to the modulating signal</p> Signup and view all the answers

    What does the graph of the carrier signal primarily represent?

    <p>A high frequency sine wave with constant amplitude</p> Signup and view all the answers

    Study Notes

    Frequency Modulation

    • Frequency modulation (FM) is a process where the carrier signal's frequency changes according to the modulating signal.
    • The carrier signal's amplitude remains constant.
    • The output frequency of the FM signal equals the carrier frequency when the modulating signal is zero.
    • When the modulating signal reaches its positive peak, the FM signal's frequency reaches its maximum.
    • At the negative peaks, the FM signal's frequency reaches its minimum.
    • The process shifts the carrier frequency (f) by a certain amount (Δf, frequency deviation).

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    FM Modulation Explained PDF

    Description

    Explore the fundamentals of frequency modulation (FM) in this quiz. Understand how the carrier signal's frequency varies with the modulating signal, while its amplitude remains constant. Delve into the nuances of frequency deviation and the behavior of the FM signal during positive and negative peaks.

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