Preparing Your Optical Spectrum Analyzer for a Test
Optical Spectrum Analyzer
21
Nulling Electrical Offsets
Nulling Electrical Offsets
The offset nulling process provides a zero-power reference measurement,
thus eliminating the effects of electronic offsets and dark current due to
detectors.
Temperature and humidity variations affect the performance of electronic
circuits and optical detectors. For this reason, EXFO recommends
performing a nulling of the electrical offsets whenever environmental
conditions change.
Nulling can be performed for all tests modes. In addition, a nulling is
performed automatically each time you start the OSA application, and at
regular intervals afterwards for WDM test mode.
To perform offset nulling:
1.
From the main window, select the
Acquisition
tab.
2.
Disconnect any incoming signal to obtain an optimal accuracy.
Summary of Contents for FTB-5240BP
Page 1: ...User Guide Optical Spectrum Analyzer for FTB 500 FTB 5240S 5240BP...
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Page 282: ...Testing DWDM Systems 274 FTB 5240S 5240BP Starting a Measurement Drift Mode DFB Mode...
Page 391: ...Managing Results Optical Spectrum Analyzer 383 Managing EDFA Test Results...
Page 394: ...Managing Results 386 FTB 5240S 5240BP Managing EDFA Test Results...
Page 407: ...Managing Results Optical Spectrum Analyzer 399 Managing Trace Files 2 Press New...
Page 414: ...Managing Results 406 FTB 5240S 5240BP Managing Trace Files...
Page 424: ...A sample Drift txt report is shown below...
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Page 437: ...Troubleshooting Optical Spectrum Analyzer 429 About 2 Press About...
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