Teledyne LeCroy Summit T3-16 PCIe Multi-lane Protocol Analyzer User Manual - Manual (Page 113)

Summit T3‐16 PCI Express Multi‐Lane Protocol Analyzer User Manual 101
Filter Out Teledyne LeCroy
5.25 Filter Out
A filter causes the Analyzer to filter out specified events from the recording. If events are
filtered out of the recording, they are excluded from the Analyzer's buffer and not simply
hidden from the CATC Trace. The purpose of filtering is to preserve recording memory so
you conduct longer recording sessions and exclude events that do not interest you.
To enable or disable filtering, place an event button into either the Global State cell or
the Sequence cell, then right‐click the button and choose an Action (see previous topic).
From the sub‐menu, select Filter Out.
Figure 5.51: Filter Out Option
Note: The Filter Out option is only available in the DLLP, TLP, and Ordered Sets TS1 and TS2.
5.26 Probe Settings
The Summit T3 analyzer can be optimized for specific DUT signal characteristics. The auto
calibration feature in the Probe Settings allows for better signal recovery. There are 16, 0
db to 15 db, internal equalization modes in the analyzer hardware that boost the high
frequency content of the captured signal. This equalization does not impact the signal to
the DUTs, but helps in ‘opening the eye’ of the captured signal, so that the internal logic
can capture PCIe frames. The system is designed to allow you to manually set the
equalization to one of the sixteen modes for the CTLE values and one of the eight modes
for the DFE values or choose to run an automated algorithm, internal to the analyzer. This
automated calibration sets the optimized values for each of the PCIe captured lanes,
provided that the signal at the analyzer input is stable.
Each lane can be configured to use specific equalization settings to match signal
characteristics of the lane and improve the analyzer’s ability to capture error free traces.
For 2.5/5.0 GT/s speeds only CTLE setting is required to achieve good captures. For 8.0 GT/
s you can adjust CTLE, DFE and DC Gain parameters.
Select Recording Options > Probe Settings from the Setup menu to display Probe
Settings.