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PC-BASED OSCILLOSCOPE

Photonics Spectra
May 2006
National Instruments Corp.Request Info
 
National-Instruments.jpgFor use by design and test engineers to make dynamic measurements, National Instruments has introduced a PCI version of its PXI-5922 flexible-resolution digitizer, also called a PC-based oscilloscope. The device uses a proprietary Flex II analog-to-digital converter that provides user-defined resolution and that can sample from 24 bits at 500 kS/s to 16 bits at 15 MS/s. Incorporated patented techniques reduce harmonics caused by the nonlinearity that is inherent to multibit converters. This results in a high dynamic range, even at high sample rates, which can be used to directly digitize low-level signals without the need for external signal conditioning. Applications include audio and ultrasound testing, characterization of high-resolution digital-to-analog converters and baseband I/Q analysis. The digitizers can be used with arbitrary waveform generators and digital waveform generator/analyzers to build mixed-signal applications at any stage in a product’s development.


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GLOSSARY
oscilloscope
A system in which a supplied signal causes the deflection of the electron beam in a cathode-ray tube, thus forming a visible trace on the phosphor screen of the tube and providing for examination of signal characteristics. A CRT oscilloscope is particularly convenient for studying repetitive phenomena, but a tube with a long-delay phosphor can be used to analyze a single electrical pulse. An oscilloscope equipped with a camera becomes an oscillograph.  
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