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9782792	PCI eXtensions for Instrumentation PCI eXtensions for Instrumentation PCI eXtensions for Instrumentation (PXI) is one of several modular electronic instrumentation platforms in current use. These platforms are used as a basis for building electronic test equipment, automation systems, and modular laboratory instruments. PXI is based on industry-standard computer buses and permits flexibility in building equipment. Often modules are fitted with custom software to manage the system. Overview. PXI is designed for measurement and automation applications that require high-performance and a rugged industrial form-factor. With PXI, one can select the modules from a number of vendors and integrate them into a single 	PCI eXtensions for Instrumentation
9782793	PXI system, over 1150 module types available in 2006. A typical 3U PXI module measures approximately (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 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. Then PXI adds integrated timing and synchronization that 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, which 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. The open 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 older VXI 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 standard operating system such as Windows 7, Windows XP, Windows 2000, or Linux (which is not yet PXI System Alliance approved), or a PCI-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 complex ATE 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. PXI Systems Alliance. PCI eXtensions for Instrumentation (PXI) is a modular instrumentation platform originally introduced in 1997 by National 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 and Teradyne. Executive Members of the alliance include Alfamation, Beijing Pansino Solutions Technology Co., CHROMA ATE Inc, GOEPEL electronic, MAC Panel, and Virginia 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. Two major players in 2006. In 2006 two major players, National Instruments and Agilent Technologies (now Keysight Technologies), entered the PXI test market. Market estimate. The PXI worldwide market size, estimated  in 2007, was and was expected to grow to over by 2010. The PXI market is also larger than the VME eXtensions for Instrumentation (VXI) market at an estimated size in 2007 of . The LAN eXtensions for Instrumentation (LXI) standard has grown to within . . PXI Express. PXI Express is an adaptation of PCI Express to the PXI form factor, developed in 2005. This increases the available system data rate to 6 GByte/s in each direction. PXI Express also allows for the use of hybrid slots, compatible with both PXI and PXI Express modules. In 2015 National Instruments extended the  standard to use PCI Express 3.x, increasing the system bandwidth to 24 GByte/s. MXI link. An MXI link provides a PC with direct control over the PXI backplane and connected cards using a PXI card and a connected PCI/CompactPCI card. This interface provides a maximum data throughput of using fiber-optic or copper cabling, and can support a maximum length of using a fiber-optic connection. PXI MultiComputing (PXImc). PXImc is an interconnection standard that allows multiple PXI systems to be linked together, with each system potentially including both instrumentation and processing. Using PXImc, data gathered from one  system can be processed in parallel on multiple computing nodes, or a single PC can access instruments in several PXI chassis. PCI eXtensions for Instrumentation PCI eXtensions for Instrumentation (PXI) is one of several modular electronic instrumentation platforms in current use. These platforms are used as a basis for building electronic test equipment, automation systems, and modular laboratory instruments. PXI is based on industry-standard computer buses and permits flexibility in building equipment. Often modules are fitted with custom software to manage the system. Overview. PXI is designed for measurement and automation applications that require high-performance and a rugged