Pulse Modulation MCQs

Practice Pulse Modulation MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Communication SystemsPulse Modulation

In pulse-amplitude modulation (PAM), which pulse parameter varies with the message signal?

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Correct Answer: A. Amplitude

Explanation: In PAM, the amplitudes of regularly spaced pulses vary according to sampled values of the message.

Reference: Standard communication systems: pulse modulation

Question 2

Communication SystemsPulse Modulation

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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

Question 3

Communication SystemsPulse Modulation

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Correct Answer: A. Position in time

Explanation: PPM varies the time position of each pulse relative to a reference according to the message signal.

Reference: Standard communication systems: pulse modulation