TS EAMCET · Physics · Communication System
If the frequencies of the carrier wave and message signal are 1 MHz and 28 kHz respectively, then the frequencies of the side bands are
- A \(1014 \mathrm{kHz}, 986 \mathrm{kHz}\)
- B \(1028 \mathrm{kHz}, 972 \mathrm{kHz}\)
- C \(29 \mathrm{kHz}, 27 \mathrm{kHz}\)
- D \(514 \mathrm{kHz}, 486 \mathrm{kHz}\)
Answer & Solution
Correct Answer
(B) \(1028 \mathrm{kHz}, 972 \mathrm{kHz}\)
Step-by-step Solution
Detailed explanation
\(f_{USB} = f_c + f_m = 1 \mathrm{MHz} + 28 \mathrm{kHz} = 1000 \mathrm{kHz} + 28 \mathrm{kHz} = 1028 \mathrm{kHz}\) \(f_{LSB} = f_c - f_m = 1 \mathrm{MHz} - 28 \mathrm{kHz} = 1000 \mathrm{kHz} - 28 \mathrm{kHz} = 972 \mathrm{kHz}\)
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