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DFCCIL EE/EC Communication System QUIZ - 1

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Question 1

In amplitude modulation, the modulation index μ, is kept less than or equal to 1 because

Question 2

If the modulation index of an AM wave is changed from 0 to 1, the transmitted power

Question 3

Determine the carrier swing of an FM which have modulation index 5 and modulating signal of 5 KHz

Question 4

A signal having modulation depth of 0.4 and 0.5 in a multitone modulation AM. What is the overall modulation depth?

Question 5

An angle modulated signal is given by s(t) = 20 cos[2πfct + 4 sin2000πt]. If fc is the carrier frequency, then the bandwidth of this angle modulated signal, according to the carson’s rule, will be

Question 6

For a PM modulator with a deviation sensitivity K = 2.5 rad/V and a modulating signal vm(t) = 2cos(2π2000t), the peak phase deviation m will be
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Jun 27AE & JE Exams