Exfo FTB -5240S/5240BP Optical Spectrum Analyzer for FT Uživatelský manuál Strana 32

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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.
³ Proper warm-up is required before performing user calibration.
³ If user correction factors are present in the module (indicated by a
message in calibration page),
³ save a backup copy of the correction factors (optional but strongly
recommended).
³ clear user correction factors.
³ Make measurements.
³ Write measurement to text file according to following format.
³ First column: reference wavelength in nm
³ Second column: wavelength (in nm) read using the OSA
application and module
³ Third column: reference power in dBm
³ 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.
³ Write new correction factors inside the module
³ Load the text file built at preceding step
³ Press Write to Module.
The application shows a warning message indicating to clear
correction factors before making new measurements
³ Verify that calibration points are properly applied.
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