AP EAMCET · PHYSICS · Communication System
A message signal of frequency \(14 \mathrm{kHz}\) is used to modulate a carrier of frequency \(900 \mathrm{kHz}\), then the frequencies of side bands are
- A \(907 \mathrm{kHz}, 893 \mathrm{kHz}\)
- B \(920 \mathrm{kHz}, 880 \mathrm{kHz}\)
- C \(914 \mathrm{kHz}, 886 \mathrm{kHz}\)
- D \(900 \mathrm{kHz}, 914 \mathrm{kHz}\)
Answer & Solution
Correct Answer
(C) \(914 \mathrm{kHz}, 886 \mathrm{kHz}\)
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \text { } f_m=14 \mathrm{kHz} ; f_c=900 \mathrm{kHz} \\ & f_c+f_m=914 \mathrm{~Hz} \\ & f_c-f_m=886 \mathrm{~Hz}\end{aligned}\)
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