National Instruments announced the release of its 100 MS/s, 100-MHz dual-channel digitizer/PC-based oscilloscope NI PXIe-5122 as well as its 50-MHz NI PXIe-6537 and 25-MHz NI PXIe-6536, both 32-channel digital I/O modules. The company also announced its NI PXIe-1065 18-slot chassis. All instruments use PXI Express technology, built on top of PCI Express and NI’s PXI standards.
PXI Express instruments can still be used in conjunction with PXI modules. The NI PXIe-1065 18-slot chassis is backwards compatible, so users don’t have to update to all-new PXI Express equipment. “On the chassis there are not only PXI Express slots, but also hybrid slots that accept both PXI and PXI Express modules,” says Kaustubh Wagle, product manager in NI’s modular instruments group. However, to take advantage of the faster throughput available with PXI Express, each of the modules need to be PXI Express.
The new instruments and chassis work with existing software, including NI LabVIEW SignalExpress and NI TestStand, and generally don’t require modifications. “PXI Express, just as PXI, is easily scalable, and going from PXI to PXI Express you can use code that you have written because PXI Express maintains complete software compatibility with PXI,” says Wagle. “You might need to update your software if you need the high throughput,” he says.
With PXI Express, Wagle says, “you can acquire your full signal and stream it to disc for hours at a time and process it later.” This is an advantage over slower data transfer components. “For example,” he says, “using a PXIe-5122 digitizer and a 12-drive RAID array with a capacity of 4 TB, data can be captured at the maximum sampling rate of 100 MS/s on both channels and streamed at a full data rate of 400 MB/s for more than 2.5 hours.”
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