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Getting Started
Steps for Setting Up Eye-Diagram Analysis
Pattern Mode Pattern mode displays the actual PRBS data stream bits. This mode uses the
pattern trigger which allows the display to show the same portion of the data
stream from sweep to sweep.
Mask/limit lines provide pass/fail testing
Mask/limit lines are displayed geometric shapes that define the acceptable
limits and shape of an eye-diagram. The following figure shows a mask. Use
masks for pass/fail testing and as an aid to error analysis. The eye-diagram
analyzer can capture and display the portion of the pattern that caused a mask
violation. Built-in standard masks for the major SONET/SDH transmission
rates are provided and can be applied with the press of a softkey. Or, you can
create your own custom masks.