Teledyne LeCroy Summit T3-8 PCIe Multi-lane Protocol Analyzer User Manual - Manual (Page 74)

Teledyne LeCroy Link Settings
62 Summit T3‐8 PCI Express Multi‐Lane Protocol Analyzer User Manual
5.14.3 Use External Reference Clock
If the PCI Express link under analysis uses spread‐spectrum clocking, then the Analyzer
must use the external reference clock from the system. If the Device Under Test does not
supply a reference clock, the internal reference clock in the Analyzer module can be used
instead. (See
Figure 5.1 on page 52 : 3E . ) Only the standard PCIe reference clock is
supported.
5.14.4 Disable Descrambling
If checked, causes the Analyzer to assume that none of the PCI Express traffic is
scrambled. By default, the Analyzer determines the scrambling state of the devices under
test. (See
Figure 5.1 on page 52: 3F.)
Note: When selecting Gen3 speed the disable scrambling option is not available. This option can be
used only for Gen1 or Gen2 speeds. It will show as well for Auto speed but it affects only Gen1 or
Gen2 traffic.
5.14.5 Auto-Configure Lane Polarity
Lets the Analyzer determine lane polarity. (See Figure 5.1 on page 52: 3G.) Auto functions
such as Auto Configure polarity rely on Gen1 or Gen2 training sequences to properly
discover their values. If the speed option is set to fixed Gen3, the analyzer will never see
these sequences and the polarity discovery will not be reported properly in the
dashboard dialog.
5.14.6 Ignore EDS
Lets the Analyzer ignore EDS. (See Figure 5.1 on page 52: 3H.)
5.14.7 Ignore Idle Errors
When set analyzer will not store errors in between packets into memory. This option
helps to preserve analyzer memory to store more packets in cases where memory
efficiency is critical. This option filters out Compliance Pattern as well. (See
Figure 5.1 on
page 52: 3I.)
5.14.8 Swizzling Config...
The Swizzling Config dialog allows you to reconfigure the order of the US (UpStream) and
DS (DownStream) lanes.
Check the box to Auto‐Configure Lane Swizzle. (See Figure 5.1 on page 52 : 3J.)
Note: Autoswizzle works only when the analyzer sees the LTSSM Configuration state link training
sequence.