An AM modulator op 10cos (200xt) and the modulation index is a 0.5. Determine the efficiency. Select one: O a Eff=11.11% O b. None of the answers. Oc Eff = 20% O d. Eff = 75.75%

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An AM modulator operates on the message signal m(t)=Scos(20st). The unmodulated carrier is given by
10cos (200xt) and the modulation index is a 0.5. Determine the efficiency.
Select one:
O a
Eff=11.11%
O b.
None of the answers.
Oc.
Eff = 20%
O d. Eff = 75.75%
AM is 100% power efficient
Select one:
O True
O False
The envelope of an AM modulated signal has the same shape as the message signal m(t).
Select one:
True
O False
Transcribed Image Text:on 1 et ered ed out of question on 2 # ed out of question 3 nd out of question An AM modulator operates on the message signal m(t)=Scos(20st). The unmodulated carrier is given by 10cos (200xt) and the modulation index is a 0.5. Determine the efficiency. Select one: O a Eff=11.11% O b. None of the answers. Oc. Eff = 20% O d. Eff = 75.75% AM is 100% power efficient Select one: O True O False The envelope of an AM modulated signal has the same shape as the message signal m(t). Select one: True O False
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