National Instruments PCI-8361 User Manual page 41

Link Activity LEDs—LEDs that indicate link activity on the cable link (LED 0) and the
backplane link (LED 4).
The PXIe-8360 also has a vertical column of 16 LEDs on the back side of the card near the front
connector, as shown in Figure 3-9. These LEDs provide additional information about the link
status of the PCI Express lanes on the module to the backplane. Each group of four LEDs
corresponds to one of the four PCI Express links to the backplane.
1 Back Panel LEDs
If you are using a chassis (such as the PXIe-1062) that directly links the
Note
PXI Express board, the LEDs to that slot will not illuminate until you have a
PXI Express board installed and linked.
If you are using the PXIe-1062 chassis, you will notice that the last group of LEDs
has an LED (PORT 3) illuminated even if no boards are populated in the slots. Since
the PXIe-1062 uses the last link for a PCI Express to PCI bridge for PXI
communication, this link should always be active. Different chassis topologies will
give different default behaviors. Contact your chassis' manufacturer for more
information on your chassis' topology.
Figure 3-9. PXIe-8360 Back Side LED Locations
MXI-Express x1 Series User Manual
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