Bandwidth calculation (spectral transmittance) – EXFO FTB -5240S/5240BP Optical Spectrum Analyzer for FTB 500 (NS-1434) User Manual
Page 529
Formulas Used with Your Optical Spectrum Analyzer
Optical Spectrum Analyzer
521
Bandwidth Calculation (Spectral Transmittance)
Bandwidth Calculation (Spectral
Transmittance)
Bandwidth is calculated using the following equation:
Where
b is the bandwidth at X dB,
λ
N
is the nominal wavelength,
λ
XdBLeft
is the wavelength on the left at which the power is X dB below
the power at the nominal wavelength.
λ
XdbRight
is the wavelength on the right at which the power is X dB
below the power at the nominal wavelength.
b
2∗Min
λ
N
λ
XdBLeft
–
(
) λ
XdBRight
λ
N
–
(
)
,
{
}
=
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