Ac Undershoot Test Method Of Implementation; Signals Of Interest - Keysight U7233A Testing Notes

5 Single-Ended Signals Overshoot/Undershoot Tests

AC Undershoot Test Method of Implementation

The Undershoot Test can be divided into two sub-tests: Undershoot amplitude and Undershoot area.
The purpose of this test is to verify that the undershoot value of the test signal is less than or equal to
the conformance limit of the maximum peak amplitude allowed for undershoot as specified in the
JEDEC Standard JESD79E.
When there is an undershoot, the area is calculated based on the undershoot width. The Undershoot
area should be less than or equal to the conformance limit of the maximum undershoot area allowed
as specified in the JEDEC Standard JESD79E.
Figure 20
Figure 21

Signals of Interest

Based on the test definition (Write cycle only):
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AC Undershoot
AC Undershoot in Infiniium oscilloscope
Data Signal
Data Strobe Signal OR
Address Signal OR
Control Signal OR
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DDR1 Compliance Testing Methods of Implementation