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A message signal of frequency `12 kHz` and peak voltage 12 volt is used to modulate a carrier of frequency ` 1 MHz` and peak voltage 24 volt. What is the modulation index and the side bands produced ? |
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Answer» Correct Answer - 0.5 , 1012 kHz , 988 kHz Here , ` A_(m) = 12 "volt" , A_( c ) = 24 "volt," v_(m) = 12 kHz,` ` v_( c ) = 1 MHz = 1000 kHz` Modulation index , `mu = ( A_(m))/( A_( c )) = ( 12)/( 24) = 0.5` The upper side band frequency ` = v_( c ) + v _(m)` ` = 1000 + 12 = 1012 kHz` The lower side band frequency ` = v_( c ) - v _(m)` ` = 1000 - 12 = 988 kHz` |
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