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National Instruments Corporation
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Getting Started
with Your NI 4472
This chapter describes the NI 4472 for PCI and the NI 4472
for PXI/CompactPCI, lists what you need to get started, explains how
to unpack your device, and describes your programming choices.
About the NI 4472
The NI 4472 is a high-performance, high-accuracy analog input device
for the PCI, PXI, or CompactPCI bus. It is part of the National Instruments
Dynamic Signal Acquisition/Analysis (DSA) product family and is
specifically designed for demanding dynamic signal acquisition
applications. The NI 4472 features eight analog input channels. These
channels are simultaneously sampled at a maximum rate of 102.4 kS/s with
24-bit resolution and multiple triggering modes, including external digital
triggering. Each input channel has an independent software-switchable
4 mA current source for Integrated Circuit Piezoelectric (ICP
®
)-type
accelerometers and microphone preamplifiers. See Appendix A,
, for details about your NI 4472.
The analog input circuitry uses oversampling delta-sigma modulating
analog-to-digital converters (ADCs). Delta-sigma converters are
inherently linear, provide built-in brick-wall anti-aliasing filters,
and have specifications that exceed other conventional technology
for this application with regard to total harmonic distortion (THD),
signal-to-noise ratio (SNR), and amplitude flatness. These features help
you acquire signals with high accuracy and high fidelity without
introducing noise or out-of-band aliases.
Applications for NI 4472 devices include audio signal processing and
analysis, acoustics and speech research, sonar, audio frequency test and
measurement, vibration and modal analysis, or any application requiring
high-fidelity signal acquisition.