Analog Modulation in Communications Quiz

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Questions and Answers

What type of modulation does not change a sinusoidal signal?

  • Pulse Modulation (correct)
  • Continuous Wave Modulation
  • Double-Sideband, Large Carrier (AM/DSB-LC)
  • Analog Modulation

Which characteristic(s) of the carrier wave are changed in Analog Modulation?

  • Amplitude only
  • Frequency only
  • Amplitude, frequency, or phase (correct)
  • Phase only

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

  • AM
  • PAM (correct)
  • FM
  • PM

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

<p>Amplitude only (A)</p> Signup and view all the answers

What is the purpose of modulation in communication systems?

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

Which of the following is NOT a type of Analog Modulation?

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

What is the definition of the modulation index?

<p>The ratio of the amplitude of the message signal to the amplitude of the carrier signal (B)</p> Signup and view all the answers

Which of the following is another name for the modulating signal?

<p>Baseband signal (D)</p> Signup and view all the answers

Which of the following is not a type of single-sideband modulation?

<p>Vestigial-sideband (AM/VSB) (D)</p> Signup and view all the answers

What is the primary purpose of modulation in communication systems?

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

Which of the following best represents the envelope of the modulated carrier in Amplitude Modulation (AM)?

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

What does AM/DSB-SC stand for?

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

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