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Commercial frequency deviation is ________

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Commercial frequency deviation is ________

(a) 75 KHz

(b) 80 KHz

(c) 85 KHz

(d) 65 KHz

I had been asked this question during an online interview.

This intriguing question originated from AM Wave Representation in chapter Amplitude Modulation of Analog Communications

1 Answer

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The correct answer is (a) 75 KHz

To elaborate: Frequency deviation is the difference between an FM modulated frequency and the carrier frequency. Commercial FM broadcasting uses a maximum frequency deviation of 75 KHz and maximum modulating frequency is approximately 15KHz.

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