Application Tutorials
Tutorial 1: Measure Eye-Parameters
Tutorial 1: Measure Eye-Parameters The eye-diagram analyzer performs automatic ey e measurements in eye
mode. This mode is similar to that of conventional s ampling oscilloscopes; the
display shows individual dots.
View the Signal
1To view the signal, press:
INSTR PRESET, Traces, persist, VARIABL
This turns the persistence mode on. Refer to Chapter 3, “Eye-Diagram Ana-
lyzer Reference” for an explanation of the available persistence modes.
2Enter the number of sweeps by pressing:
PERSIST SWEEPS and enter 8
3Turn autoscaling on by pressing:
prev menu, AUTO-SCALE
The display should look similar to the display of a sampling oscilloscope. See
the following figure.
The large overshoot shown is a result of the particular laser bias setting used.
If the edges of the waveform are unstable in time (indicating no trigger), refer
to the “To Manually Set the Trigger Level” on page1-25.