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ANALOG COMMUNICATION Lecture 14
GATE Questions on M (Part 3)
Ques A Am ransmthr Sra diats 0 o
H 2 t = _2.wat+
80. The amplitude of a sinusoidal carrier is modulated by a single sinusoid to obtain the amplitude modulated signal s(t) = 5cos 1600nt + 20cos 1800t + 5cos 2000rt. The value of the modulation index is 12016-01] IS
ms 00 Cawu 2 2- 2.
84. Consider the following amplitude modulated signal:  s(t) = cos(2000xt) +4cos(2400m) + cos(2800t) The ratio (accurate to three decimal places) of the power of the message signal to the power of the carrier signal is
"To find 2 2 m.-2
1 6 2 2. Naw, Pm -2 0.25 Pc
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