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  1. In 50% modulated signal, the carrier is suppressed for transmission. The saving in transmitted power would be—
    1. 88.9%
    2. 11.1%
    3. 72%
    4. 18%
Correct Option: A

% Power saving
=
Power saved
×100
Total Power


=
Pc
×100
(1 + μ2/2)


=
2
×100
2 + μ2


=
2
×100
2 + (0.5)2

(∴ μ = 50 % = 0.5)

=
2
×100 = 88.88 %
2 + .25

Hence alternative (A) is the correct choice.



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