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Electronics and Communication Communication Systems Difficulty: Medium

An amplitude modulated signal is given by: S(t) = 10cos(2π × 10 6 t) + 5cos(2π × 10 6 t)cos(2π × 10 3 t) + 2cos(2π × 10 6 t)cos(4π × 10 3 t) The effective modulation index is:

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