The National Instruments PXI-4461 (Part Number: 779687-01) is a high-performance PXI Sound and Vibration Module designed for sound and vibration testing applications. This module features two channels for dynamic signal generation and acquisition, with flexible gain settings that allow users to configure the input range according to their specific needs. The PXI-4461 supports programmable AC/DC coupling and includes Integrated Electronics Piezoelectric (IEPE) conditioning, facilitating precise measurements with various transducers such as receivers and accelerometers that have wide dynamic ranges. Typical applications include audio testing, automotive noise, vibration, and harshness (NVH) analysis, as well as machine condition monitoring.

The PXI-4461 provides two terminal configurations for analog input: differential and pseudo-differential, with the latter offering a resistance of 50 Ω between the external BNC shell and the chassis frame. Each channel is equipped with digital filters to mitigate aliasing, allowing for independent configuration; one channel can operate in differential mode while the other in pseudo-differential mode based on the test setup. Synchronization capabilities enable the acquisition clock to align with other devices in mixed-signal contexts. The module supports digital and analog triggering, featuring 24-bit resolution analog-to-digital converters for simultaneous sampling at software-configurable rates, including standard rates of 44.1 kS/s and 48.0 kS/s, commonly used in professional digital audio applications.

The PXI-4461 is compact, measuring 6.3 x 3.9 inches and weighing 8.5 ounces. It comes with a three-year warranty and maintains availability for purchase and repair through Apex Waves, despite a last time buy date of December 28, 2023. Detailed product documentation, including user and maintenance manuals, is available for download. For pricing inquiries, please contact a sales representative.