Universal instrument

Design and test engineers can use a single modular instrument to make a wide range of dynamic measurements with the National Instruments flexible resolution digitiser.

The PXI-5922 digitiser allows engineers to combine the module with LabVIEW 7.1 to create numerous types of instruments, such as AC voltmeters, audio analysers, frequency counters, spectrum analysers or I/Q modulation analysers.

Unlike traditional measurement devices that have a fixed resolution for all sample rates, the digitiser uses the FlexII ADC that has flexible resolution and can sample anywhere from 16 bits at 15 MS/s to 24 bits at 500 kS/s.

The Flex II ADC incorporates methods for reducing the linearity and temperature drift errors inherent in multi-bit sigma-delta converters to achieve dynamic range at high sample rates.

With the module's large dynamic range and low noise, design and test engineers can directly digitise low-level signals without the need for external signal conditioning, such as filters and low-noise amplifiers. Reduced signal conditioning improves measurement accuracy and reliability while also saving test system development time.