User guide

The measurement is run and the result window shows the bit error rates measured
at six measurement points.
The Relative Time refers to the current sampling point.
The Voltages are the decision threshold voltages for measuring the bit error rate
at this measurement point. The voltages of the measurement points can be set as
absolute voltages, as offset voltages, or as percentages.
How to Optimize the View of the Results
After you have run a measurement, the resulting numerical values are displayed.
To improve the results, you can change the measurement parameters:
1
Press the Properties button to open the Properties dialog box.
2
Use the different tabs in this dialog box to make the required settings:
– Parameters tab
These settings are used for data collection. Changes require to run the test
again. See “Parameters Tab” on page 312 for details.
– Pass/Fail tab
These settings determine whether the calculated results are recognized as
passed or failed. However, a new test run is not required when changes are
made here. See “Pass/Fail Tab” on page 313 for details.
– View tab
All settings on this tab only affect the way the data is displayed. You do not
need to run the measurement again. See “View Tab” on page 314 for
details.
3
Press OK when you have made all required changes to close the Properties
dialog box.
Fast Eye Mask - Reference
The Fast Eye Mask measurement returns the results in a numerical form. The
following sections provide explanations of the measured parameters and the
display options that are specific to this measurement.
Properties that can be specified on the various tabs of the Properties dialog box:
Advanced Analysis 6
Agilent J-BERT N4903B High-Performance Serial BERT 311