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Tuesday, 12 November 2013


With 100% modulation,ratio of side band power to total power transmitted in an amplitude modulated wave is

CaptureA) 2/3

B) 1/3

C) 1/2

D) 1/4

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  1. ratio of sideband power to total power= u^2/(2+u^2) where u=modulation index. Since u=1, so ratio=1/3. ans is b

  2. here as we know total power pt = pc (carrier power )+ pc.m^2/2 ( sideband or modulating power ) . now at m = 1 we can calculate modulating power/total power