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Communication SystemsPulse Modulation

In pulse-width modulation (PWM), the message information is represented by variations in pulse?

  • AAmplitude only
  • BWidth or duration
  • CCarrier frequency only
  • DPolarity only
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Correct Answer: B. Width or duration
Explanation: PWM represents the message by changing pulse duration while other pulse parameters are nominally fixed.
Reference: Standard communication systems: pulse modulation
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