AP EAMCET · PHYSICS · Communication System
A modulated signal is given by \(C_m(t)=A_c \sin \omega_c t+\mu A_c \sin \omega_m t \sin \omega_c t\), where \(\mu\) is modulation index. To keep the signal without distortion, the value of \(\mu\) should be
- A >1
- B ≥ 1
- C 0
- D ≤ 1
Answer & Solution
Correct Answer
(D) ≤ 1
Step-by-step Solution
Detailed explanation
Modulation index \(\mu\) is given by \(\mu=\frac{A_m}{A_c}\) where, \(A_m\) and \(A_c\) are amplitude of modulating wave and carrier wave. \(\Rightarrow\) To keep signal without distortion, \(\begin{gathered} A_m \leq A_c \\ \mu \leq 1 \end{gathered}\)
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