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What is the commercial frequency deviation of frequency modulation?(a) 70 KHz(b) 75 KHz(c) 80 KHz(d) 85 KHzThis question was posed to me by my college professor while I was bunking the class.The question is from Singletone SSB Modulation topic in portion SSB Modulation of Analog Communications

Answer»

Right choice is (B) 75 KHz

Easiest explanation: FREQUENCY DEVIATION is the difference between the maximum instantaneous modulated frequency and carrier frequency. Frequencies lying NEARLY about 75KHZ is considered as commercial frequency deviation for frequency modulation.



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