題組內容
1. An AM modulator has output $$x_c(t) = A \cos 2\pi(200)t + B \cos 2\pi(180)t + B \cos 2\pi(220)t$$ The carrier power is 200W, and the efficiency is 20%.
(b) \( (10\%) \) Determine the modulation index.
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1. An AM modulator has output $$x_c(t) = A \cos 2\pi(200)t + B \cos 2\pi(180)t + B \cos 2\pi(220)t$$ The carrier power is 200W, and the efficiency is 20%.
(b) \( (10\%) \) Determine the modulation index.