Analog Modulation in Communications Quiz
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Questions and Answers

What is the modulation index defined as?

  • The ratio of the amplitude of the message signal to the amplitude of the carrier signal (correct)
  • The ratio of the frequency of the message signal to the frequency of the carrier signal
  • The ratio of the amplitude of the carrier to the amplitude of the message signal
  • The ratio of the phase of the message signal to the phase of the carrier signal

    • Is the modulating signal also known as the baseband signal?

  • True, but only in digital modulation
  • Partially true
  • False
  • True (correct)

    • Is Vestigial-sideband (AM/VSB) a type of single-sideband modulation?

  • True
  • False (correct)
  • True, but only in certain regions
  • It depends on the frequency used

    • What is the main purpose of modulation in communication systems?

    <p>To reduce noise and interference</p> Signup and view all the answers

    How is the envelope of the modulated carrier in Amplitude Modulation (AM) represented?

    <p>$A(t)$</p> Signup and view all the answers

    What does AM/DSB-SC stand for?

    <p>Amplitude Modulation with Double-Sideband and Suppressed Carrier</p> Signup and view all the answers

    What is the primary characteristic that is modified in Analog Modulation?

    <p>All of the above</p> Signup and view all the answers

    In Double-Sideband, Large Carrier (AM/DSB-LC) modulation, which characteristic of the carrier signal remains constant?

    <p>Both frequency and phase</p> Signup and view all the answers

    Which of the following is NOT a type of Continuous Wave Modulation?

    <p>Pulse Amplitude Modulation (PAM)</p> Signup and view all the answers

    What is the purpose of modulation in communications?

    <p>To increase the efficiency of radiation</p> Signup and view all the answers

    In Pulse Modulation, what characteristic of the pulse train is modified according to the message signal?

    <p>Any of the above</p> Signup and view all the answers

    Which of the following statements about Pulse Modulation is correct?

    <p>None of the above</p> Signup and view all the answers

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