Agilent Technologies 83482A, User Manual, Page: 50 / 88

3-14
Calibration Overview
User Calibrations—Optical and Electrical
To initiate a dark calibration
1 Press the
Display
key. Press the
Color grade
softkey, and set its setting to
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.
2 Press the blue shift key, and then the
Meas eye
softkey which is located beneath
the display.
3 Press
Extinction ratio...
and then
Dark cal
.
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.
Figure 3-4. Dark calibration menu