Exfo FTB -5240S/5240BP Optical Spectrum Analyzer Manual de usuario Pagina 627

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Formulas Used with Your Optical Spectrum Analyzer
OSA 621
Bandwidth Calculation (Spectral Transmittance)
Bandwidth Calculation (Spectral
Transmittance)
Bandwidth is calculated using the following equation:
Where
b is the bandwidth at X dB,
N
is the nominal wavelength,
XdBLeft
is the wavelength on the left at which the power is X dB below
the power at the nominal wavelength.
XdbRight
is the wavelength on the right at which the power is X dB
below the power at the nominal wavelength.
b2
Min
N
XdBLeft

XdBRight
N
=
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