U4301B Datasheet, PDF (10/19 Pages) Keysight Technologies – PCI Express 3.0 Analyzer Module

10 | Keysight | U4301B PCI Express^® 3.0 Analyzer Module - Data Sheet
Product Features and Benefits Overview (Continued)
LTSSM
Effective presentation of protocol interactions from physical layer to transaction layer features:
–– LTSSM Overview with full state transaction traffic captured at the PHY layer logic sub block
–– Industry standard spreadsheet format protocol viewer with:
–– Highlighting by packet type or direction
–– Easy flow columns to better understand the stimulus and response nature of the
protocols
–– Context-sensitive columns to show only the relevant information, minimizing the need to
scroll horizontally
–– Flexible GUI configuration to meet debug needs, with pre-defined GUI layouts for link
training debug, config accesses and general I/O
Figure 11. LTSSM diagrams show the state transitions and training flow of the link. Deep dive into the trace with packet synchronization.
Equalization (EQ) analysis
Analyzing the equalization process requires the review of thousands of packets. To understand
the process that the link goes through to finalize on a selected set of transmit coefficients, the
U4301B summarizes the key parameters and steps. Each lane is processed separately and the
EQ analysis makes it easy to see any values as the are modified.
Figure 12. Quickly identify the changing equalization settings for each lane, with the values highlighted in blue.