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      Question

      In PAM technique which of the below attributes of the

      pulse is used to vary as the amplitude of message varies
      A Frequency of pulse Correct Answer Incorrect Answer
      B Width of pulse Correct Answer Incorrect Answer
      C Amplitude of pulse Correct Answer Incorrect Answer
      D Phase of pulse Correct Answer Incorrect Answer

      Solution

      • Why Correct: In Pulse Amplitude Modulation (PAM), the amplitude of each pulse is varied proportional to the instantaneous amplitude of the message signal.
      • Why Others are Wrong:
        • Frequency → PWM/PPM, not PAM.
        • Width → Pulse Width Modulation (PWM).
        • Phase → Pulse Phase Modulation (PPM).

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