Performing a null measurement – EXFO FTB-5500B PMD Analyzer User Manual
Page 49
Operating the Polarization Mode Dispersion Analyzer
Polarization Mode Dispersion Analyzer
41
Performing a Null Measurement
Performing a Null Measurement
This feature allows you to perform an offset nulling of your FTB-5500B
Polarization Mode Dispersion Analyzer. During this operation, no light
should reach the detector port of the Polarization Mode Dispersion
Analyzer.
The very first time you insert an FTB-5500B Polarization Mode Dispersion
Analyzer into the FTB-500, the application will prompt you for a nulling.
EXFO recommends that you perform a null measurement just before
verifying the input power level to ensure the accuracy of the displayed
level.
To perform a null measurement:
1. From the main window, click the Parameters tab. Click Nulling and
follow the on-screen instructions.
2. When nulling is complete, click Close.
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