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Q1:

An FM transmitter delivers 80W to a load of 30 W when no modulation is present. The carrier is now frequency modulated by a single sinusoidal signal and the peak frequency deviation is so adjusted to make the amplitude of the second sideband is zero in the given output.
J0(0, 0) = 1,
J0(2, 4) = 0,
J0(3.8) = - 0.4,
J0(5.1)= - 0.1
J1(2, 4) = 0.52,
J1((3.8) = 0,
J1(5.1) = - 0.33,
J2(2.4) = 0.1
J2(3.8)= 0.41,
J2(5.1) = 0
Power in the first order sidebands is :

A 5.12 W

B 21.78 W

C 2.56 W

D 16.81 W

ANS:B - 21.78 W

Power in first order side bands = 2(J1(β))2 x 100 = 21.78 W.



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