Specifications.......................................................................................................................... 23
PCIe-8398 (156877x-01L) Specifications...................................................................... 23
PXIe-8398 (156874x-01L) Specifications...................................................................... 26
PXIe-8399 (156874x-02L) Specifications...................................................................... 29
PXIe-8394 (156874x-04L) Specifications...................................................................... 32
Common Questions.................................................................................................................35
General Hardware........................................................................................................... 35
MXI-Express Gen-3 x16 Upgrade Questions................................................................. 36
General Software.............................................................................................................36
Documentation Notice for Third Party Software....................................................................37
Overview
Gen-3 MXI-Express is based on off-the-shelf PCI Express technologies. A Gen-3 MXI-
Express module can control PXI Express or CompactPCI Express chassis from a PC or a PXI
Express or CompactPCI Express chassis. The architecture is transparent to device drivers, so
no additional software is needed for PXI Express devices installed in connected chassis.
Note For full PXI/PXI Express functionality such as chassis and controller
identification, trigger routing, and slot detection, install the PXI Platform Services
software included with your kit. You also can find this software at ni.com/
updates by searching for PXI Platform Services.
The basic PCI Express lane consists of dual unidirectional differential links implemented as
one transmit pair and one receive pair. The link between the PC and chassis can be up to 16
lanes wide and supports speeds up to PCI Express Gen-3.
The following table lists the signaling rate of each PCI Express generation.
Table 1. PXI Express Generation Signaling Rates
PCI Express Generation Signaling Rate
First 2.5 Gb/s/lane/direction of raw bandwidth
Second 5.0 Gb/s/lane/direction of raw bandwidth
Third 8.0 Gb/s/lane/direction of raw bandwidth
Note This link is compatible with the cabled PCI Express specification developed
by the PCI-SIG.
2 | ni.com | MXI-Express Gen-3 x16 User Manual
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