PCI eXtensions for Instrumentation Card
PXI uses PCI-based technology and an industry standard governed by the PXI Systems Alliance (PXISA) to ensure standards compliance and system interoperability. PXI is based on CompactPCI, and it offers all of the benefits of the PCI architecture, including performance, industry adoption, COTS technology. PXI adds a rugged CompactPCI mechanical form-factor, an industry consortium that defines hardware, electrical, software, power and cooling requirements, leaving nothing to chance.
PXI also adds integrated timing and synchronization that is used to route synchronization clocks, and triffers internally.