GRL-PCIE5-CEM-RXA User Guide and MOI
Rev7.0
© Granite River Labs 2022 Version 7.0, June 2022. Updated 06.29.2022
Page 79 of 123
o
Determine which CTLE and Preset combination provides the largest Eye Area (Eye
Width * Eye Height) and record these values.
•
Using the Optimized Preset and CTLE, save at least 10 waveforms and obtain the
average value.
•
Adjust the Eye Height/Eye Width to target specification values by scanning through:
o
SJ: 1 to 5 pspp
o
DM: 5 to 30 mV at TP2
o
VSwing : 720 mV to 800 mV (To be adjusted only if unable to achieve target values
with SJ/DM combination)
•
If the target values cannot be achieved, reduce ISI by 0.5 dB and repeat the steps from
“Determine the Optimized Preset and CTLE as follows:…” until
the total ISI loss is 34
dB.
b)
Scope Settings:
•
Averaging: OFF
•
Horizontal Scale: 6.25 µs/div (2M UI)
•
Bandwidth: 33 GHz
•
Sampling Rate:
≥
128 GS/s
c)
SigTest Settings:
•
Select Technology as ‘
PCI
e’
•
Select
Generation as “5_0”
•
Select Test as “RXCal”
•
Click “Confirm”
•
Browse to the saved waveform file
•
Select Template as “Eye_Cal”
•
Set CTLE Gain, for example: -5
•
Run Test
