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Which of the following is not an advantage of digital modulation?

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Which of the following is not an advantage of digital modulation?

(a) Greater noise immunity

(b) Greater security

(c) Easier multiplexing

(d) Less bandwidth requirement

I had been asked this question by my school teacher while I was bunking the class.

The doubt is from Digital Modulation in division Modulation Techniques for Mobile Radio of Wireless/Mobile

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The correct option is (d) Less bandwidth requirement

The explanation: Digital modulation offer many advantages over analog modulation. Some advantages include greater noise immunity and robustness. They provide easier multiplexing of various forms of information and greater security.

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