Setting Up Your CT440 for Measurements
CT440
27
Performing User Referencing
Performing User Referencing
Zeroing the Electrical Offset on Detectors
The zeroing function enables you to mitigate the effect of dark current on low power level
measurement by first measuring the power on the selected detector when no fiber is
connected and then storing that value for power correction.
The correction is automatically taken into account in the next power measurement.
In the
Referencing
window, the
Zero Detector X
buttons enables you to zero the wanted
detectors.
You cannot zero the dark current on the
Analog In
BNC connector located on the rear
located on the rear panel of the CT440 (see
To zero the detectors:
1.
Make sure that no fiber is connected to the detector you want to set to zero.
2.
In the main window, click the
Referencing
button
The
Detector Zeroing
area enables you to zero the dark current on the wanted
detector.
3.
In the
Referencing
window, click the
Zero Detector
button corresponding to the
wanted detector.
The detector dark current is set to zero. If too much power is measured on the detector,
the operation fails.
Summary of Contents for CT440 Series
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