Mastering AM Modulation

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Questions and Answers

Find the peak amplitude of the upper and lower side frequency voltages.

  • 20 V
  • 3.75 V
  • 7.5 V (correct)
  • 27.5 V

Find the maximum and minimum amplitudes of the envelope.

  • 27.5 V and 7.5 V
  • 20 V and 7.5 V
  • 27.5 V and 12.5 V (correct)
  • 7.5 V and 3.75 V

What is the expression for the modulation wave?

  • $Vam(t)=20sin(2Ï€510kHzt)-3.75 cos(2Ï€510kHzt)+3.75 cos(2Ï€490kHzt)$
  • $Vam(t)=20sin(2Ï€500kHzt)-3.75 cos(2Ï€510kHzt)+3.75 cos(2Ï€490kHzt)$ (correct)
  • $Vam(t)=20sin(2Ï€510kHzt)-7.5 cos(2Ï€510kHzt)+7.5cos(2Ï€490kHzt)$
  • $Vam(t)=20sin(2Ï€500kHzt)-3.75 cos(2Ï€490kHzt)+3.75 cos(2Ï€510kHzt)$

What is the frequency of the carrier signal?

<p>500 kHz (D)</p> Signup and view all the answers

What is the frequency of the modulating signal?

<p>10 kHz (B)</p> Signup and view all the answers

What is the total coefficient of modulation for the given AM DSBFC transmitter?

<p>0.76 (C)</p> Signup and view all the answers

What is the total sideband power for the given AM DSBFC transmitter?

<p>22.5 W (B)</p> Signup and view all the answers

What is the total transmitted power for the given AM DSBFC transmitter?

<p>122.445 W (B)</p> Signup and view all the answers

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