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If the modulating frequency of a carrier wave varies between 100Hz and 100KHz, find it’s bandwidth?(a) 100 KHz(b) 230.2 KHz(c) 199.8 KHz(d) 123.6 KHzThe question was posed to me in exam.This is a very interesting question from Digital Multiplexing topic in section Multiplexing & Sampling of Bandpass Signal of Analog Communications

Answer»

Right CHOICE is (C) 199.8 KHz

The best explanation: fm = fmax – fmin = 100KHz – 100Hz = 99.9KHz and Bandwidth = 2fm = 2 X 99.9 = 199.8 KHz.



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