configuration mechanism requires PCI Express cables, not the connector-compatible cables
that other standards use. When multiple cables are used for a single link, the cables must be
the same length.
Note
National Instruments offers x8 cables. x16 connections require two cables,
and the cables must connect the ports in ascending order. For example, ports 1-2 of a
PCIe-8398 will connect to ports 1-2 of a PXIe-8398, and ports 3-4 will connect to
3-4.
For the PXIe-8399, connect daisy-chain ports 5 and 6 to ports 1 and 2 on the PXIe-8398 or
PXIe-8399.
Figure 8. Connection Options
PXIe-8399
PXIe-8398
PXIe-8394
PCIe-8398
PXIe-8399
PXIe-8398
PXIe-8394
PWR/
LINK
PWR/
LINK
PWR/
LINK
PWR/
LINK
4
1
4
3
2
1
4
3
2
1
4
3
2
1
8
7
6
5
PWR/
LINK
MXI-Express
MXI-Express
MXI-Express
Port 1 of the PXIe-8398 and PXIe-8399 is upstream facing, meaning it is the link going toward
the host. This means it is connected to a PXIe-8394, PCIe-8398, or a downstream facing port
of a PXIe-8398 or PXIe-8399.
MXI-Express Gen-3 x16 User Manual
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© National Instruments
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