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PCI eXtensions for Instrumentation (PXI) is one of several modular electronic instrumentation platforms in current use based on thePeripheral Component Interconnect bus, which includesPCI Express (PCIe). These platforms are used as a basis for buildingelectronic test equipment,automation systems, and modularlaboratory instruments.
PXI is based onindustry-standardcomputer buses and permits flexibility in building equipment. Often, modules are fitted with customsoftware to manage the system.
PXI is designed for measurement and automation applications that require high-performance and a rugged industrial form-factor.
With PXI, one can select modules from a number of vendors and integrate them into a single PXI system, over 1150 module types available in 2006. A typical3U PXI module measures approximately100 x 160 mm (4x6") in size, and a typical 8-slot PXI chassis is 4U high and half rack width, full width chassis contain up to 18 PXI slots.
PXI uses PCI-based technology and an industry standard governed by the PXI Systems Alliance (PXISA) to ensure standards compliance and system interoperability.
There are PXI modules available for almost every conceivable test, measurement, and automation application, from the ubiquitous switching modules and DMMs, to high-performance microwave vector signal generation and analysis.
There are also companies specializing in writing software for PXI modules, as well as companies providing PXI hardware-software integration services.
PXI is based onCompactPCI, and it offers all of the benefits of thePCI 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.
Then PXI adds integrated timing and synchronization which is used to route synchronization clocks, and triggers internally. PXI is a future-proof technology, and is designed to be simply and quickly reprogrammed as test, measurement, and automation requirements change.
Most PXI instrument modules are register-based products, that use software drivers hosted on a PC to configure them as useful instruments, taking advantage of the increasing power of PCs to improve hardware access and simplify embedded software in the modules. Theopen architecture allows hardware to be reconfigured to provide new facilities and features that are difficult to emulate in comparable bench instruments.
PXI system data bandwidth performance easily exceeds the performance of the olderVXI test standard. There is debate within the technical community as to whether newer standards such as LXI will surpass PXI in both performance and overall cost of ownership.
PXI modules providing the instrument functions are plugged into a PXI chassis which may include its own controller running an industry standardoperating system such asWindows 7,Windows XP,Windows 2000, orLinux,[1] or aPCI-to-PXI bridge that provides a high-speed link to a desktop PC controller. Likewise, multiple PXI racks can be linked together with PCI bridge cards, to build very large systems such as multiple source microwave signal generator test stands for complexATE applications.
CompactPCI and PXI products are interchangeable, i.e. they can be used in either CompactPCI or PXI chassis, but installation in the alternative chassis type may eliminate certain clocking and triggering features. So, for example, you could mount a CompactPCI Network interface controller in a PXI rack to provide additional network interface functions to a test stand. Conversely, a PXI module installed in a CompactPCI chassis would not utilize the additional clocking and triggering features of the PXI module.
PCI eXtensions forInstrumentation (PXI) is a modular instrumentation platform originally introduced in 1997 byNational Instruments. PXI is promoted by the 69-member PXI Systems Alliance (PXISA), whose sponsor members are (in alphabetical order)ADLINK,Cobham Wireless,Keysight Technologies,Marvin Test Solutions,National Instruments,Pickering Interfaces andTeradyne.[2]
Executive Members of the alliance includeAlfamation, Beijing Pansino Solutions Technology Co.,CHROMA ATE Inc.,GOEPEL electronic,MAC Panel, andVirginia Panel Corp. Another 56 associate member organizations that do not have voting rights are supporting PXI and use the PXI logo on their products and marketing material.[2]
National Instruments andAgilent Technologies (nowKeysight Technologies) entered the PXI test market in 2006.
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Interfaces are listed by their speed in the (roughly) ascending order, so the interface at the end of each section should be the fastest.  Category | |
