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The first PXI Express timing and synchronisation controller
National Instruments is introducing further additions to its NI timing tools, including what it claims is the industry's first PXI Express timing and synchronisation controller and a PXI module that synchronises PXI systems over GPS, Inter-Range Instrumentation Group (IRIG) and IEEE 1588. With these new products, engineers can achieve improved synchronisation and timecode capabilities in PXI systems, which is important for synchronising multiple systems, precisely timestamping events and improving measurement accuracy in automated test and data acquisition applications. These new timing features are integral to the development and control of large distributed systems such as particle accelerators and high-energy physics systems.
Engineers can use the PXI Express system timing controller, the NI PXIe-6672, to synchronise multiple PXI Express systems with nanosecond precision. The controller also makes it easy to synchronise PXI Express systems with GPIB, VXI and other measurement and instrumentation systems. This system timing controller generates high-resolution clocks from DC to 105MHz for clocking instruments at precise frequencies and includes a high-stability TCXO reference with 1ppm stability. With the controller's onboard routing of internal and external clocks and triggers, engineers have complete control over the PXI trigger bus, star trigger lines and system reference clock. They can also use this controller to implement complex synchronisation schemes in a single PXI Express chassis, which is an important capability for high-channel-count and high-performance test and measurement applications.
The new NI PXI-6682 module provides the following functions: GPS time, location and velocity; IRIG-B decoding; and IEEE 1588 synchronisation. The module is designed for timestamping and triggering measurements or events across large physical objects such as aircraft and bridges or geographically distributed systems such as power grids and accelerators. Engineers can also use the module as a grandmaster in an IEEE 1588 network. The IEEE 1588 precision time protocol (PTP) provides a standard method to synchronise PXI, LXI and other IEEE 1588-based devices on an Ethernet network. Additionally, the NI PXI-6682 features complete PXI system timing controller functionality including the capability to control the PXI trigger bus, star trigger lines and system reference clock.
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