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DSA modules' large dynamic range cuts noise

Posted: 19 Jan 2011     Print Version  Bookmark and Share

Keywords:PXI Express  module  signal acquisition  DAQ 

National Instruments announces the NI PXIe-449x series of high-channel-count dynamic signal acquisition (DSA) modules.


The modules provide AC/DC coupling for sensor measurements with a microphone or accelerometer and voltage measurements from a tachometer or DUT, allowing engineers to use a single device for all their sound and vibration acquisition needs.

The NI PXIe-449x modules feature a choice of 8 or 16 channels with 24bit ADCs per channel and 113dB dynamic range. The large dynamic range minimises the noise floor, making it easy to detect even small vibration and acoustic signals. The NI PXIe-449x modules also offer software-selectable gains that help engineers configure gain on each channel for improved SNR.

With the NI PXIe-449x modules, engineers can synchronise physical measurements of any type and correlate real-time events. The modules sync with the NI SC Express family of DAQ modules, which provide signal conditioning and connectivity suitable for temperature, strain and high-voltage acquisition. The ability to combine the modules makes the PXI platform suitable for structural test, design validation and other dynamic tests.

The NI PXIe-449x devices are also compatible with the NI Sound and Vibration Measurement Suite, an interactive software for acquiring, analysing and logging acoustic and vibration measurements. The suite includes the NI Sound and Vibration Assistant and NI LabVIEW analysis VIs. High-level, ready-to-run applications for performing nondestructive tests are included.

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