NI flexible-resolution digitiser 'Best-in-Test'
15 November 2006
Test & Measurement
Test & Measurement World magazine recently named the National Instruments' PXI-5922 flexible-resolution digitiser as a Best-in-Test winner and finalist for the Test Product of the Year in the publication's 2006 Best-in-Test awards. It selected the NI PXI-5922 flexible-resolution digitiser because of its user-defined resolution and proprietary linearisation technique, which combine to make the digitiser a flexible general-purpose instrument for dynamic measurements, according to the company.
Unlike traditional oscilloscopes and PC-based digitisers that have a fixed resolution for all sample rates, the NI PXI-5922 is a flexible-resolution digitiser with which engineers can trade sample rate for resolution through software. For example, at 15 MS/s, the module delivers 16 bits of resolution; by reducing the sample rate to 500 kS/s or less through a software call, the same module (without any hardware changes) delivers 24 bits of resolution.
The NI PXI-5922 digitiser is the industry's highest dynamic range digitiser with noise density as low as -170 dBFS/Hz. With the increased dynamic range, engineers can analyse a signal that was previously lost in the noise floor of their instrumentation. This unprecedented dynamic range and flexible resolution are possible, says NI, with the development of the Flex II analog-to-digital converter technology, which uses an enhanced multibit delta-sigma converter and patented techniques for digital linearisation.
For more information contact NI South Africa, 0800 203 199.
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