FM Radio Frequency Modulation

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Questions and Answers

What is the condition for an FM signal to be classified as a narrowband FM signal?

  • 𝛽 ≪ 1 or ∆𝑓 ≪ 𝑓𝑚 (correct)
  • 𝛽 = 1 or ∆𝑓 = 𝑓𝑚
  • 𝛽 > 1 or ∆𝑓 > 𝑓𝑚
  • 𝛽 ≫ 1 or ∆𝑓 ≫ 𝑓𝑚

What is the relationship between the amplitude of sidebands and the coefficient 𝐽𝑛(𝛽) in an FM signal?

  • The amplitude of sidebands is independent of 𝐽𝑛(𝛽)
  • The amplitude of sidebands is dependent on the square of 𝐽𝑛(𝛽)
  • The amplitude of sidebands is inversely proportional to 𝐽𝑛(𝛽)
  • The amplitude of sidebands is directly proportional to 𝐽𝑛(𝛽) (correct)

What is the difference between the spectrum of narrowband FM and AM signals?

  • The sideband components are 180 degrees out of phase (correct)
  • The sideband components are at different frequencies
  • The sideband components are 90 degrees out of phase
  • The sideband components have the same amplitude

What is the transmission bandwidth required for a narrowband FM signal?

<p>2𝑓𝑚 (C)</p> Signup and view all the answers

What is the role of the modulation index 𝛽 in determining the number of sideband components in an FM signal?

<p>It determines the number of sideband components (D)</p> Signup and view all the answers

What is the condition for an FM signal to be classified as a wideband FM signal?

<p>𝛽 ≫ 1 or ∆𝑓 ≫ 𝑓𝑚 (D)</p> Signup and view all the answers

What is the approximate bandwidth required for a wideband FM signal?

<p>2∆𝑓 (D)</p> Signup and view all the answers

What is the significance of Carson's Rule in FM signal transmission?

<p>It determines the transmission bandwidth for an FM signal (A)</p> Signup and view all the answers

What is the symmetrical property of sidebands in an FM signal?

<p>Each sideband is at a similar distance to 𝑓𝑐 (A)</p> Signup and view all the answers

What is the significance of the Bessel table in FM signal transmission?

<p>It provides the coefficient 𝐽𝑛(𝛽) for calculating the amplitude of sidebands (A)</p> Signup and view all the answers

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