Teledyne LeCroy QPHY-SAS2 - Manual (Page 34)

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917718 Rev A

F4 is the histogram of all of the measured 20-80 rise times.

Z2 is a zoom of F1.
Figure 28 - Rise and Fall Times Results
In the Measure section:

Rise 20-80 (P1) is 20-80 rise time of the differential input waveform (F1).

Fall 80-20 (P2) is the 80-20 fall time of the differential input waveform (F1).

Rise(UI) (P3) is the 20-80 rise time converted to Unit Interval. This is the measured value of TX - Trise
(20-80) (5.3.6). The mean of this value for all rising edges in the differential input must be greater than
.25UI in order to pass this test.

Fall(UI) (P4) is the 80-20 fall time converted to Unit Interval. This is the measured value of TX - Tfall (80-20)
(5.3.6). The mean of this value for all falling edges in the differential input must be greater than .25UI in
order to pass this test.
Tx 5.3.7 and 5.3.8 RJ, TJ (MFTP, MFTP-SSC-DOWN, MFTP-SSC-CENTER, MFTP-SSC-UP)
The purpose of these tests is to verify that the Random Jitter and Total Jitter are within the specification limits.
This test is run for all supported SSC modes (No SSC, SSC Down Spreading, SSC Center Spreading, and SSC
Up Spreading). After the completion of these tests the oscilloscope is in the following configuration:
Figure 29 - Oscilloscope Configuration after the Rj and Tj Tests