Question:
In an FM Broadcast, the maximum frequency deviation allowed is 75 kHz and the maximum modulation frequency is 15 kHz. The bandwidth is closest to
In an FM Broadcast, the maximum frequency deviation allowed is 75 kHz and the maximum modulation frequency is 15 kHz. The bandwidth is closest to
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Use Carson’s Rule: $BW = 2(\Delta f + f_m)$ for FM signal bandwidth calculations.
Updated On: May 26, 2025
- 180 kHz
- 60 kHz
- 105 kHz
- 120 kHz
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The Correct Option is A
Solution and Explanation
The bandwidth of an FM signal is calculated using Carson’s Rule:
\[
BW = 2(\Delta f + f_m) = 2(75 + 15) = 180 \text{ kHz}
\]
Where:
$\Delta f$ = frequency deviation = 75 kHz,
$f_m$ = maximum modulation frequency = 15 kHz.
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