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EXFO FTB -5240S/5240BP Optical Spectrum Analyzer User Manual

Page 300

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Managing Results

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FTB-5240S/S-P/BP

Managing FP Test Results

Peak mode wavelength/frequency: indicates the
wavelength/frequency of the peak mode of the Fabry-Perot laser.

MTSM at 10.00 dB: indicates the maximum wavelength difference
between the peak power mode and the last mode with amplitude that
is one tenth (10 dB down) of the peak mode amplitude.

Fit width at 3.00 dB: indicates the spectral width of the Gaussian fit at
3 dB.

Fit width at 20.00 dB: indicates the spectral width of the Gaussian fit at
20 dB.

Mode spacing: average estimated spectral spacing between adjacent
Fabry-Perot modes of the FP.