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A 10kW carrier is simultaneously modulated by two modulating signals corresponding to a modulation index of 40% and 30%, respectively. The total radiated power will be:

 

34) A 10kW carrier is simultaneously modulated by two modulating signals corresponding to a modulation index of 40% and 30%, respectively. The total radiated power will be:

  • 1. 10 kW [Option ID = 2965]
  • 2. 12.5 kW [Option ID = 2966]
  • 3. 11.25 kW [Option ID = 2967]
  • 4. 10.25 kW [Option ID = 2968]

Answer: 3

Soution

Effective modulation index = sqrt(0.4^2 + 0.3^2) = 0.5

now , Pt = Pc(1+(Effective modulation index)^2/2)
or, Pt = 10kW * 1.125 = 11.25 KW
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