Carson's Rule (FM Bandwidth) (B_FM ≈ 2(Δf + f_m))
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B_FM ≈ 2(Δf + f_m)
What each symbol means
| Symbol | What it stands for |
|---|---|
| f_m | Highest modulating frequency (Hz) |
| Δf | Peak frequency deviation of the carrier (Hz) |
| B_FM | Approximate bandwidth containing ~98% of FM power (Hz) |
When to use this
Wideband FM; Carson's rule is an engineering estimate used in JEE for required channel width.