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If the line power has been cycled, the dark calibration invokes either the
o set zero calibration or plug-in vertical calibration as needed. This increases
the time required for the dark calibration to complete. The
softkey is located within the Extinction ratio menu.
To initiate a dark
1. Press the
calibration
2. Press the blue shift key, and then the
3. Press
Disconnect all inputs from the module, including the trigger signal, and block
any ambient light to the photodetector with a connector plug. Follow the
instructions on the screen.
If extinction ratio measurements are being made after the vertical scale or
the o set has changed.
key. Press the
4
Display
5
to
NNNNNNNN
.
on
Color grade must be enabled to perform an extinction ratio
measurement and a Dark calibration. In addition, the dark level
(amplitude when there is no signal present) must be on the screen to
perform a Dark calibration.
beneath the display.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Extinction ratio ...
FINAL TRIM SIZE : 7.5 in x 9.0 in
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Color grade
NNNNNNNNNNNNNNNNNNNNNNNNNN
Meas eye
and then
NNNNNNNNNNNNNNNNNNNNNNNNNN
Dark cal
Figure 3-2. Dark calibration menu
Calibration Overview
User Calibrations
NNNNNNNNNNNNNNNNNNNNNNNNNN
Dark cal
softkey, and set its setting
softkey which is located
.
3-9
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