PXI Express, like PXI, leverages from the CompactPCI specification to define a rugged,
modular form factor that offers superior mechanical integrity and easy installation and removal
of hardware components. PXI Express products offer higher and more carefully defined levels
of environmental performance required by the shock, vibration, temperature, and humidity
extremes of industrial environments. Mandatory environmental testing and active cooling is
added to the CompactPCI mechanical specification to ease system integration and ensure
multivendor interoperability.
The demanding timing and synchronization requirements of instrumentation systems are met
by the integrated features of PXI Express. Not only are the trigger bus, 10 MHz system
reference clock, and star trigger bus available in PXI retained by PXI Express, but new timing
and synchronization features that include a 100 MHz differential system reference clock for
the synchronization of multiple modules and three differential star trigger buses for the
distribution of precise clock and trigger signals have been added. Differential timing and
synchronization signals provide PXI Express systems with increased noise immunity and the
ability to transmit clock signals at higher frequencies.
NI PXIe-8830mc Overview
Functional Overview
The NI PXIe-8830mc is a PXImc device
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module that allows the attachment of subsystems
such as standalone instruments, PCs, or other PXI Express systems to an existing PXI Express
system via a high-bandwidth, low-latency PXI Express backplane Gen2 x8 link. The NI
PXIe-8830mc contains a PXImc logic block that makes it possible to join systems together
nontransparently.
The following figure illustrates where the PXImc logic block is applied to join the root
complexes of two systems.
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Refer to the
PXI-7 PXI MultiComputing Hardware Specification
Revision 1.0, available on the
pxisa.org
website, for relevant terminology and concepts used in this guide.
NI PXImc Devices User Manual
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© National Instruments
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