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National Instruments Corporation 1-1 PCI-4451/4452 User Manual
1
Introduction
This chapter describes the PCI-4451 and PCI-4452 devices, lists what you
need to get started, explains how to unpack your devices, and describes the
optional software and optional equipment.
The PCI-4451/4452 are high-performance, high-accuracy analog I/O
devices for the PCI bus. These devices are members of the PCI-DSA series
and are specifically designed for demanding dynamic signal acquisition
applications. The PCI-4451 has two channels of 16-bit simultaneously
sampled input at 204.8 kS/s and two channels of 16-bit simultaneously
updated output at 51.2 kS/s, while the PCI-4452 has four channels of 16-bit
simultaneously sampled analog input at 204.8 kS/s. Information on analog
output applies only to the PCI-4451, where as information on analog input
applies to both the PCI-4451 and the PCI-4452.
Both the analog input and the analog output circuitry have oversampling
delta-sigma modulating converters. Delta-sigma converters are inherently
linear, provide built-in brick-wall anti-aliasing/imaging filters, and have
specifications that exceed other conventional technology for this
application with regard to THD, SNR, and amplitude flatness. You can use
these high-quality specifications and features to acquire or generate signals
with high-accuracy and fidelity without introducing noise or out-of-band
aliases.
Applications 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 with a bandwidth up to 95 kHz or signal generation with a
bandwidth up to 23 kHz.
User.book Page 1 Tuesday, April 14, 1998 10:20 AM