Chapter 2
Installation and Configuration
©
National Instruments
2-11
MXI-Express Gen II x8 Series User Manual
The NI PXIe-8381 also has a vertical column of 6 LEDs on the back panel
of the card near the front connector, as shown in Figure 2-5. These LEDs
provide additional information about the link status of the PCI Express
lanes on the module. The lower four correspond to links to the backplane,
the middle LED corresponds to the cable port, and the top-most LED
corresponds to the SMBus controller.
Figure 2-5.
NI PXIe-8381 Back Side LED Locations
The SMBus Controller Link Status LED reports if the PCIe switch of the
NI PXIe-8381 has successfully linked to the onboard PCIe-to-PCI bridge
responsible for the SMBus controller. During normal operation, the
SMBus Controller Link Status LED should blink green with a 25% active
duty cycle.
The Cable Port Link Status LED reports a solid green status if the
NI PXIe-8381 has successfully established a Gen II x8 cable link.
1
S
MB
us
Controller Link
S
t
a
t
us
LED
2
C
a
ble Port Link
S
t
a
t
us
LED
3
B
a
ckpl
a
ne Link
S
t
a
t
us
LED
2
1
3
