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Which of the following is a drawback of FM systems?

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Which of the following is a drawback of FM systems?

(a) Burst noise

(b) Susceptible to atmospheric noise

(c) Wider frequency band

(d) Poor performance in fading

I had been asked this question in an international level competition.

My question is from Frequency Modulation Vs. Amplitude Modulation in division Modulation Techniques for Mobile Radio of Wireless/Mobile

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The correct answer is (c) Wider frequency band

The best I can explain: FM systems have many advantages over AM systems. They also have certain disadvantages. FM systems require a wider frequency band in transmitting media in order to obtain the advantages of reduced noise and capture effect. It is generally several times as large as that needed for AM.

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