Category : Electrical and electronic equipment & instrumentations > Electrical protection devices, fuses

PRINT

BACK

PXI-Based Flexible Resolution Digitiser Delivers Industry’s Highest Dynamic Range

March 22, 2005 – Design and test engineers can now use a single modular instrument to make a wide range of dynamic measurements with the new National Instruments flexible resolution digitiser. Just as the digital multimeter brought universal measurement capability to DC measurements, the NI PXI-5922 flexible resolution digitiser revolutionises dynamic measurements with a universal measurement device. Engineers can combine the module with NI LabVIEW 7.1 to create numerous types of instruments, such as AC voltmeters, audio analysers, frequency counters, spectrum analysers or I/Q modulation analysers, that often exceed the measurement performance of high-end traditional instruments with similar functionality.

“Virtual instrumentation redefined how test and measurement systems were built,” said Dr. James Truchard, NI President and CEO. “The NI PXI-5922 flexible resolution digitiser redefines how the hardware for virtual instrumentation is built by providing a device that spans many different applications. The module ensures error-free measurements for the broadest set of applications of any digitiser and takes us a long way toward our goal of a universal instrument measurement platform.”

Unlike traditional measurement devices that have a fixed resolution for all sample rates, the NI PXI-5922 digitiser uses the NI 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 NI FlexII ADC incorporates patented NI methods for reducing the linearity and temperature drift errors inherent to multi-bit sigma-delta converters to achieve unprecedented 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.

The combination of measurement flexibility and high dynamic range make the NI PXI-5922 module ideal for a wide range of applications. With performance exceeding the best commercially available ADCs, for example, engineers can use the module to characterise and test the latest DACs. For precision audio applications, the digitiser’s unparalleled ability to acquire signals with 24-bit resolution at up to 500 kS/s means engineers can capture high-order harmonics with wide dynamic range. The module’s 18-bit resolution at 10 MS/s makes it an excellent digitiser for acquiring baseband I/Q signals used in digital communications systems.

The NI PXI-5922 module is built on the Synchronisation and Memory Core (SMC) architecture for tight synchronisation with other SMC-based products such as high-speed digitisers, arbitrary waveform generators and digital waveform generator/analysers. This gives the module multiple instrument synchronisation with module-to-module skew of less than 1 ns typical; deep, flexible onboard memory up to 256 MB per channel; and high-speed data
streaming. Engineers can use the module to create mixed-signal stimulus response measurements or to expand the number of acquisition channels up to 1,632 channels by synchronising multiple NI PXI-5922 modules.

List of all articles from this supplier

- National Instruments Introduces New Line of HMIs for LabVIEW
- National Instruments has announced NI LabWindows/CVI Version 8.0
- NI PCIe-1430 frame grabber from National Instruments
- NI announces Analog Devices’ ADIsimADC analogue-to-digital converter (ADC) modeling software
- National Instruments Drives Data Acquisition Innovation with Industry’s First PCI Express Multifunction DAQ Devices
- New NI Toolkit Delivers Measurement and Calibration for Electronic Control Units

List of all articles from this supplier

List of articles in this sub-category

- FS725 Benchtop Rubidium Frequency Standard
- SIM900 flexible platform
- SLD dual input modular electronic loads
- TrueWave ideal for testing electronic equipment
- 2200 and 5000A isolators
- 88000 Series ATS-620 Array Test System

List of all articles in this sub-category Electrical protection devices, fuses

List of all articles in this sub-categoryList of all articles in this sub-categoryList of all articles in this sub-category