Leader LV 5480, Функциональное меню пояснения

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9. EYE PATTERN DISPLAY (SER02/SER09)
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● Displaying the Eye Pattern and Jitter Simultaneously
By using the layout feature, you can display the eye pattern and jitter simultaneously. For
details, see the LV 5490 instruction manual.
Figure 9-3 Eye pattern and jitter display
9.1 Eye Pattern Display Explanation
● Automatic Measurement
On the eye pattern display, values such as the amplitude of the eye pattern and the jitter
are measured automatically and displayed. Measured values are normally displayed in
white, but they are displayed in yellow until they stabilize and in red if they exceed the
values that you have specified in the error setup. If automatic measurements cannot be
performed due to noise in the waveform or other reason, measured values are displayed
as "----.” If this occurs, use cursors to measure manually.
Reference Section 9.9, “Configuring Error Detection Settings”
The timing jitter and current jitter measurement items show the values that were measured
in jitter display mode. The LV 5490SER02 use a phase detector to perform these
measurements.
Other measurement items show the measured values calculated from the eye pattern
waveform. Therefore, if the waveform degrades significantly, the difference between the
automatically measured values and the cursor-measured values may become large.