EXFO FTB -5240S/5240BP Optical Spectrum Analyzer for FTB 500 (NS-1434) - Manual (Page 32)

Preparing Your Optical Spectrum Analyzer for a Test
24 FTB-5240S/5240BP
Performing User Calibration
A high level sequence of steps to perform user calibration are listed below,
with the detailed instructions in the following procedures.
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Proper warm-up is required before performing user calibration.
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If user correction factors are present in the module (indicated by a
message in calibration page),
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save a backup copy of the correction factors (optional but strongly
recommended).
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clear user correction factors.
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Make measurements.
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Write measurement to text file according to following format.
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First column: reference wavelength in nm
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Second column: wavelength (in nm) read using the OSA
application and module
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Third column: reference power in dBm
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Fourth column: power (in dBm) read using the OSA application
and module
100 calibration points limit in the application. Each value in the file
must be separated using semi-colon (;) character.
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Write new correction factors inside the module
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Load the text file built at preceding step
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Press Write to Module.
The application shows a warning message indicating to clear
correction factors before making new measurements
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Verify that calibration points are properly applied.