Question
What is the effect on the transmitted power of am signal when the modulation index changes from 0.8 to 1?
Answers
The total power in an AM is given by 
Pt = Pc (1 + m2/2) 
Where Pc is the carrier power and m is the modulation index.
Therefore,
Pt1 = Pc (1 + 0.82/2) = 1.32 PcPt2 = Pc ( 1 + 12/2) = 1.5 PcIncrease in power = (1.5 Pc - 1.32 Pc)/ 1.32 Pc= 0.1364   Your Comment




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