Analog Communication - Electronic Engineering (MCQ) questions & answers for Q. 13607

Q.  Calculate the power in a DSB SC signal when the modulation is 60% with a carrier power of 600W.
- Published on 13 Oct 15

a. 600 W
b. 540 W
c. 108 W
d. 300 W

ANSWER: 108 W
 
The total power in an AM is given by
Pt = Pc (1 + m2/2)
Given: m = 0.6
Therefore DSB power = (m2/2)Pc
= 600* (0.6)2/2
= 108 W

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