Exfo FTB-5230S Optical Spectrum Analyzer for FTB 200 v2 Manuale Utente Scaricare il pdf (Pagina 28)

Preparing Your OSA/OCA for a Test

22 FTB-5230S/-OCA

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/OCA application, and

at regular intervals afterwards.

Note: You cannot perform an offset nulling in the offline version of the

application.

To perform an offset nulling:

1. From the main window, select the Acquisition tab.

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Exfo FTB-5230S Optical Spectrum Analyzer for FTB 200 v2 Manuale Utente Pagina 28