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 In amplitude modulation, sinusoidal carrier frequency used is denoted by ωc and the signal frequency is denoted by ωm. The bandwidth (ωm) of the signal is such that \Delta \omega _{m}< < \omega _{m}.  Which of the following frequencies is not contained in the modulated wave ?

  • Option 1)

    ωm

  • Option 2)

     ωc

  • Option 3)

     ωm+ωc

  • Option 4)

    ωc−ωm

 

Answers (1)

best_answer

As we have learned

Side band frequency -

AM wave contains three frequency f_{c},\left ( f_{c}+f_{m} \right )\: and \: \left ( f_{c}-f_{m} \right )

 

- wherein

f_{c} is carrier frequency, f_{c} -f_{m} \:and\: f_{c}+f_{m} are side band frequency.

 

 Modulated wave has frequency 

w_c , w_c \pm w_m

 


Option 1)

ωm

Option 2)

 ωc

Option 3)

 ωm+ωc

Option 4)

ωc−ωm

Posted by

Avinash

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