Autotestcon: National Instruments debuts PXI Express RF generator

-- Test & Measurement World, 9/24/2007 12:12:00 PM

National Instruments at Autotestcon announced the release of the NI PXIe-5672, an RF vector signal generator that delivers signal generation from 250 kHz to 2.7 GHz, 20 MHz of instantaneous bandwidth, and real-time data streaming at up to 25 Msample/s. The NI PXIe-5672 also features a PXI Express interface that makes it possible to stream data from hard disk or PC memory at the full output rate of the instrument. The NI PXIe-5672 is compatible with all NI PXI and PXI Express modular instruments and NI LabView modulation algorithms.

The company reports that while on traditional instruments, waveform generation and acquisition sizes are generally limited to several hundred megabytes because of bus-bandwidth and onboard-memory limitations, the NI PXIe-5672’s PXI Express technology enables engineers to use a redundant array of independent disks (RAID) to continuously stream waveforms that are up to 3 Tbytes in size.

Using NI PXIe-5672, engineers can implement RF record and playback applications. Combined with the NI PXI-5661 vector signal analyzer and the NI HDD-8264 RAID array, engineers have the ability to stream up to 20 MHz of RF bandwidth for more than five hours. Using this technique, engineers can record RF signals from many types of physical locations and under a variety of environmental conditions, making it possible to capture signals that exhibit traditional wireless challenges including multipath fading, interference and fluctuations in signal strength.

Engineers also can use the NI PXIe-5672 to regenerate recorded waveforms in a laboratory environment. This technique for waveform generation improves the efficiency and accuracy of wireless receiver validation and verification by allowing for more repeatable channel emulation testing.

www.ni.com/streaming/rf.htm.

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