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InterviewSolution
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Draw a block diagram of a simple modulator for obtaining amplitude modulated signal. A carrier waves of peak voltage 12 V is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 75% ? |
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Answer» SOLUTION :Block DIAGRAM of a simple MODULATOR for OBTAINING amplitude modulated signal: `A_(c)= 12 V," " mu= 75% = 0.75` `therefore"" mu = (A_(M))/(A_(c))` or, `"" A_(m)= muA_(c) = 0.75 xx 12 V = 9 V` `therefore` The peak voltage of the modulating signal should be 9 V. 
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