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  • Help me understand! A carrier wave of peak voltage 14 V is used for transmitting a message signal. The peakvoltage of modulating signal given to achieve a modulation index of 80% willbe :

A carrier wave of peak voltage 14 V is used for transmitting a message signal. The peak
voltage of modulating signal given to achieve a modulation index of 80% will
be :

  • Option 1)

    7 V

  • Option 2)

    28 V

  • Option 3)

    11.2 V

  • Option 4)

    22.4 V

 

Answers (1)

best_answer

As we have learned

Modulation Index -

The ratio of change of amplitude of carrier wave to the amplitude of original carrier wave.

- wherein

m_{a}= K\frac{E_{m}}{E_{c}}

 

 modulation index \mu = A_{m}/A_{c}

A_{c}= 14 v , \mu = 0.8

A_{m}= 14 * 0.8=11.2

 

 

 

 

 


Option 1)

7 V

This is incorrect

Option 2)

28 V

This is incorrect

Option 3)

11.2 V

This is correct

Option 4)

22.4 V

This is incorrect

Posted by

Aadil

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