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Communication Systems - Engineering

Q1:

If e = 10 sin(108 t + 3 sin 104 t) then the modulation index is

A 1

B 2

C 3

D 4

ANS:C - 3

s(t)=Ac cos(2πfct+βsin(2πfmt)).

According to this formula, beta is actually modulation index so it is 3.