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An audio signal has a bandwidth of 25 kHz. The maximum value of |m(t )| is 5V. This signal frequency modulates a carrier. If the frequency sensitivity constant of the modulator is 20 kHz/V, then according to Carson’s rule, the bandwidth of the modulator output would be—
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- 50 kHz
- 250 kHz
- 200 kHz
- 100 kHz
- 50 kHz
Correct Option: B
BW = 2 (β + 1) fm
where,
| β = | = | = 4 | ||
| fm | 25 × 103 |
BW = 2(4 + 1) 25 kHz = 250 kHz
