Test References - Keysight U7233A Testing Notes

5 Single-Ended Signals Overshoot/Undershoot Tests
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10 Get timestamp of voltage value for GND (0 V) level closest to the minimum peak point value in
11 Calculate the Undershoot area (V-ns)
12 When multiple trials are performed, the largest value (worst case) among all the trials will be
13 Compare test results against the compliance test limits.

Test References

See Table 20 - AC Overshoot/Undershoot Specification for Address and Control Pins, and Table 21 -
AC Overshoot/Undershoot Specification for Data, Strobe and Mask Pins, in the JEDEC Standard
JESD79E.
70
Perform signal skew checking on the DQ-DQS to ensure that it can be triggered during the
Read/Write separation later.
Initialize the scope settings.
Get timestamp of minimum peak voltage on the waveform.
Perform manual zoom waveform to minimum peak area.
order to calculate the undershoot length duration.
a Area of calculation is based on the area of calculation of a triangle where the undershoot width
is used as the triangle base and the undershoot amplitude is used as the triangle height.
b Area = 0.5 * base * height.
used as the test result for the Undershoot amplitude and Undershoot area. The worst case for the
area might not happen during the worst case for the amplitude.
DDR1 Compliance Testing Methods of Implementation