Product Overview

The National Instruments PXIe-4341 is a dynamic signal acquisition module for PXI Express systems. It is designed for high resolution measurement of signals that change over time, such as vibration, sound, pressure, and structural response. The module provides 24 bit analog input and is intended for test applications that require low noise and accurate frequency domain analysis.

The PXIe-4341 is part of the NI dynamic signal acquisition family. It can be used in PXI Express chassis with other instruments and modules for mixed signal test. Typical users include mechanical test engineers, acoustic engineers, and researchers who need synchronized multi channel dynamic data.

Analog Input and Resolution

The module provides 24 bit analog input resolution, which supports fine measurement of small dynamic signals. High resolution is important in vibration and acoustic testing because the signal of interest may be small compared with the overall noise floor. The module is designed with low noise input circuitry and anti alias filtering to preserve signal quality.

The PXIe-4341 supports high speed sampling suitable for dynamic signal analysis. It can capture time domain waveforms for later processing, including fast Fourier transform, octave analysis, and order tracking. The module is used with software that provides these analysis functions and supports data logging for later review.

Signal Conditioning and Sensors

The PXIe-4341 is designed to work with sensors commonly used in dynamic testing. These include accelerometers, microphones, force sensors, and pressure transducers. Some dynamic signal acquisition modules include IEPE conditioning for powered sensors. Engineers should verify the specific input configuration and sensor compatibility for their system.

Proper cabling, grounding, and shielding are important for low level dynamic measurements. The module supports synchronized acquisition across channels so that phase relationships between sensors can be preserved. This is useful in modal analysis, rotating machinery test, and acoustic array measurements.

PXI Express Integration

The PXIe-4341 uses the PXI Express platform for high bandwidth data transfer and timing synchronization. It can share trigger lines and clocks with other PXI Express modules. This allows dynamic signal acquisition to be coordinated with analog output, digital I/O, and other instruments in the same chassis.

The module is supported by NI-DAQmx and related NI software for configuration and programming. Engineers can set sampling rates, input ranges, triggering, and channel settings through standard software tools. The module can be used in LabVIEW and other compatible development environments for automated test and analysis.

Typical Applications

• Vibration and modal analysis

• Acoustic measurement and sound quality test

• Rotating machinery monitoring

• Structural dynamic response testing

• Multi channel dynamic signal acquisition

• Laboratory research and product validation

The PXIe-4341 provides 24 bit dynamic signal acquisition in a PXI Express module. Its high resolution, synchronization features, and software support make it suitable for vibration, acoustic, and dynamic signal test systems.