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An AM signal has the form u (t) = [10+ 4 cos 2000nt + 10 cos 6000t] cos 2fct, where f = 105Hz. 1-

An AM signal has the form u (t) = [10+ 4 cos 2000nt + 10 cos 6000t] cos 2fct, where f = 105Hz. 1- Sketch the (voltage) spectrum of u (t). 2- Determine the power in each of the frequency components. 3- Determine the modulation index. 4- Determine the sidebands' power, the total power, and the ratio of the sidebands' power to the total power.

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