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Communication System Basics Quiz
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Communication System Basics Quiz

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Questions and Answers

What are the basic elements of a communication system according to the given text?

  • Modulation techniques, spectrum, carrier signal, side band modulation, MF incosivgenragletranasrema
  • Information source, transmitter, channel, receiver, destination (correct)
  • Source, amplitude modulation, noise, antenna height, line-of-sight path
  • Noise source, modulation, receiver, antenna, interference

    • What is the need for modulation in modern communication systems?

  • Reduce antenna height
  • Minimize noise
  • Reduce interference of signals
  • All of the above (correct)

    • How is amplitude modulation defined according to the text?

  • A process in which the amplitude of modulating signal varies according to the instantaneous value of carrier signal
  • A process in which the amplitude of carrier signal varies according to the instantaneous value of modulating signal (correct)
  • A process in which the frequency of carrier signal varies according to the instantaneous value of modulating signal
  • A process in which the phase of carrier signal varies according to the instantaneous value of modulating signal

    • What are the types of amplitude modulation mentioned in the text?

    <p>Double side band suppressed carrier (DSB-SC) modulation, Single side band suppressed carrier (SSB-SC) modulation, Vestigial side band (VSB) modulation</p> Signup and view all the answers

    Do modulation techniques decide the antenna height according to the text?

    <p>No, because antenna height is determined by other factors like line-of-sight path</p> Signup and view all the answers

    What does the modulation index represent in amplitude modulated wave?

    <p>The strength of the message signal present in the modulated wave</p> Signup and view all the answers

    What happens if the modulation index is too high in amplitude modulation?

    <p>The amplitude modulated wave is clipped off, causing large distortion at the receiver side</p> Signup and view all the answers

    What is Double Sideband Suppressed Carrier (DSB-SC) modulation?

    <p>A modulation technique that suppresses or eliminates the carrier and transmits only the two sidebands</p> Signup and view all the answers

    What are the advantages of DSB-SC modulation?

    <p>Significant power saving by suppressing the carrier signal and good signal to noise ratio</p> Signup and view all the answers

    What are the disadvantages of DSB-SC modulation?

    <p>Difficulty in recovering the DSB-SC signal at the receiver side and high bandwidth</p> Signup and view all the answers

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