Teledyne LeCroy QPHY-SAS3 - Manual (Page 31)

QPHY-SAS3 Software Option
Figure 24 - Rj and Tj Results
In the SDA Jitter Section:
• Tj(1e-12), Rj(spD), Dj(spD), Pj, DCD, and Bitrate are shown. These are all calculations from SDA
III. Only the Rj(spD) and Dj(spD) parameters are used for further calculation. The rest of the
parameters are informational only.
• Rj(spD) is the measured value for Tx - RJ (1-sigma) (5.3.7) using the “spectral direct” method. This
is reported as informational only.
In the Measure section:
• Rj(14sigma) (P8) is calculated by multiplying Rj(spD) by 14. The resulting value is multiplied by
12e9 to convert to unit intervals. This is the measured value for Tx- Rj14Sigma (5.3.7). This
value must be less than 150mUI in order to pass this test.
• Dj(SAS3) (P9) converts Dj(spD) to unit intervals by multiplying by 12e9.
• Tj(SAS3) is the sum of Rj(14sigma) and Dj(SAS3) (as described in the specification). This is the
measured value for Tx – Tj (5.3.8). This value must be less than 250mUI in order to pass this
test.
Tx 5.3.9 Waveform Distortion Penalty (Not applicable for 12Gbps)
The purpose of this test is to verify that the Waveform Distortion Penalty is within the specification limits.
Due to licensing issue with the required SASWDP script that must be run for this test, it cannot be run
automatically by QPHY-SAS3. For this reason, the WDP test is not included in any of the preloaded
configurations. However, QPHY-SAS3 can automatically capture the files that are required to run the
SASWDP script. When this test is run, the user will be presented with the following dialog:
Figure 25 - WDP Message Box
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