Electronics and Communication Engineering - Exam Questions Papers - Discussion
Discussion Forum : Exam Questions Papers - Exam Paper 10 (Q.No. 17)
17.
A 1000 kHz carrier wave modulated 40% at 4000 Hz is applied to a resonant circuit tuned to a carrier frequency and having Q = 140. What is the degree of modulation after passing the wave through this circuit?
Answer: Option
Explanation:
Resulting depth of modulation is given by :
when δ = 
fc = 1000 x 103 Hz
fm = 4 x 103 Hz
δ = 
m0 =
=
= 0.27 .
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