HP 54750A, User Manual, Page: 134 / 478

Eye , Mask and Eyeline Mode Measurement T utorials
Making Eyeline Measurements
(HP 83480A Option 001 only)
T o return to the eyeline menu, press:
4 Application 5
Initiate error trace capture mode by pressing:
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
START/CLEAR ERROR TRACE CAPTURE
In this mode , the eye shows on the upper screen and any waveform
violations show up on the bottom screen. The mask extends vertically across
the entire screen, but this does not cause a problem.
The analyzer continues to measure waveforms until a mask violation occurs .
Standard masks , custom masks , or mask margins can generate violations .
When a violation occurs , the trace leading to the violation is displayed.
This trace will be updated when subsequent violations occur . T o stop the
measurement at this point, set the appropriate \run until" condition in the
mask test menu.
Figure 5-25. Error trace capture example.
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