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What is the effect on the transmitted power, if the modulation index changes from 0.8 to 1?(a) 0.1364(b) 0.239(c) 0.5(d) 0.3333I had been asked this question in class test.The doubt is from Need of Transducers topic in chapter Receivers & Transducers of Analog Communications |
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Answer» RIGHT option is (a) 0.1364 For explanation: The total power in an AM is given by, PT = PC (1+^m^2⁄2). When modulation index, m = 0.8PT = PC (1+^0.8^2⁄2)=1.32Pc and when modulation index, m = 1PT=PC (1+^1^2⁄2)=1.5PC. So increase in power = |
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