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All the output pulses are at full transmitter power for a strong signal in all of the following except ________

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All the output pulses are at full transmitter power for a strong signal in all of the following except ________

(a) PAM

(b) PFM

(c) PCM

(d) PWM

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My question is based upon Applications of VSB topic in section SSB Modulation of Analog Communications

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Correct answer is (a) PAM

For explanation: In pulse modulation, message signal in the form of pulses are varied with respect to width, amplitude or position. Pulse amplitude modulation varies amplitude of pulses for transmission of data. Its’ output pulses are not at full transmitter power for a strong signal and thus it is an exception.

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