Teledyne LeCroy QPHY-PCIe3-Tx-Rx - Manual (Page 22)

18 923662 Rev B
Figure 11 – Example of Signal Test dialog and Signal Test results.
System Rx
This configuration includes two steps.
Step 1 is to perform Rx calibration by using the CBB3 and CLB3. Calibration includes the
following parameters

Preset 0-10 plus -6dB De-emphasis/6dB preshoot, and Amplitude

RJ

SJ

Differential Mode Noise

Eye Height and Eye Width
Calibration can be reused for multiple tests. The calibration table is saved under the path:
C:\Program Files (x86)\LeCroy\XReplay\results. All results are saved with time stamped file
name. The file with no time stamp is the latest result.
Within the same session, you will be prompted to run additional RX Tests (ie, with a different
preset). To use previous calibration results in a new session, uncheck “RX Cal” group. If “Rx
Cal” is unselected, you will be prompted to use the previous calibration.
Step 2 is to perform the actual receiver tolerance test using the calibrated values above. The
test criteria for Rx compliance are to run BER with the calibrated stress eye for 2:05 with no
errors using any Preset or cursor setting. You will be prompted to select the TxEQ setting as
calibrated in step 1. If enabled, the script will vary the TX equalization around the selected
preset, if the test does not pass at the selected preset. This should be enabled for system
testing especially.
For 95% confidence level BER testing, the test time required will be 6 minutes and 5 seconds.