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Application Tutorials
Tutorial 1: Measure Eye-Parameters
Example of a Large Overshoot Resulting from Laser Bias
Perform an Offset Calibration
This calibration procedure removes any offset that may be present in the opti-
cal-to-electrical converter. This is sometimes referred to as the "dark" level.
The offset calibration ensures accurate measurements of the laser’s one and
zero levels.
4 Turn the laser off. (If you are measuring the pattern generator directly,
disconnect the input signal at channel 1.)
5 Perform the calibration by pressing:
Trg,Cal, OFFSET CAL, CONT
The calibration takes about a minute to execute. When the calibration is fin-
ished, DC NULL: done is displayed.
6 Turn the laser on. (If you are measuring the pattern generator directly,
reconnect the input signal at channel 1.)
Measure Signal Parameters
7 To include the rise time and fall time measurement in the displayed results,
press:
Measure, r/f tim ON OFF ON