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At peak modulation an SSB transmitter radiate 1000W, what will it radiate with no modulation?

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At peak modulation an SSB transmitter radiate 1000W, what will it radiate with no modulation?

(a) 1000 watts

(b) 500 watts

(c) 250 watts

(d) 0 watts

I have been asked this question during an interview.

I need to ask this question from Demodulation of VSB Modulated Wave in chapter VSB Modulation of Analog Communications

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Correct answer is (d) 0 watts

To explain: Power of a modulated wave is directly proportional to modulation index. Thus, if there is no modulation in any SSB transmitter than, it will not radiate. So it will radiate 0 watts when there is no modulation.

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