Keysight PXI/AXIe Chassis Reference Guide 17
Guidelines to Diagnose and Resolve Communication Problems
Setup Applications with Recommended and Supported Configurations
There are many configurations you can create to setup a proper PXIe or AXIe
system. Refer to the Interface Modules and Adapters for PXIe and AXIe Systems
Data Sheet (https://literature.cdn.keysight.com/litweb/pdf/5992-0377EN.pdf)
for other examples of recommended and supported configurations. You can also
use the Multi-Chassis Designer Tool (www.keysight.com/find/pxie-multichassis)
to check if your configuration is supported.
Power-up the Chassis First
Even if you are connected through USB or Thunderbolt, always power up all
chassis and wait for all status LEDs on modules and chassis to have solid green
lights before booting the PC if you are using an external PC. An embedded PC
will power-up correctly if using a single chassis, but secondary chassis must be
powered-up first. If you are connecting multiple chassis together, consider using
the multi-chassis power sequencing capability built into many of Keysight's
chassis.
Do Not Hot Plug or Unplug
Even if you are connected through LAN, USB or Thunderbolt, treat these like
PCIe cabled solutions. If you change any connectivity cabling between chassis
and the external PC, always power cycle the whole system with proper power
sequencing to allow PC to enumerate the system properly again.
Ensure LEDs are Lit Correctly on System Module
If you are using the M902xA system modules in the PXIe system with PC
configuration, ensure the status LEDs are lit and are the correct color for your
given configuration. The status LEDs tell you the status of the module, the link
connection, and the backplane connection. There are also a series of LEDs across
the top and bottom of the system modules indicating power and configuration.
Refer to the PXIe System Modules Installation Guide
(
www.keysight.com/find/PXIeSystemModulesInstallation
) for details of how to
diagnose connection issues with these LEDs.
Lower Transfer Rate Settings to Ensure Reliability
Sometimes a device cannot correctly follow the PCIe training protocol and the
link fails to connect reliably. As a workaround or diagnostics debug step, you can
use the DIP switches on the system modules to lower the maximum negotiated
PCIe speed to Gen1. This lower speed may allow your device to function reliably.
Refer to the PXIe System Modules Installation Guide
(www.keysight.com/find/PXIeSystemModulesInstallation) for instructions on
setting the DIP switches.
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