1.

Which among the following is the Analog Continuous Modulation technique?(a) PAM(b) PCM(c) AM(d) PMI had been asked this question during an interview.Origin of the question is Time Domain Description topic in chapter Double Sideband Suppressed Carrier Modulation of Analog Communications

Answer»

Correct choice is (c) AM

To elaborate: Only AM (AMPLITUDE Modulation) is Analog CONTINUOUS Modulation technique while rest are DIGITAL Modulation techniques. In AM, the amplitude of a carrier WAVE is varied with respect to the instantaneous amplitude of the MESSAGE signal. This is how amplitude modulation takes place.



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