I. Product Introduction The PXI-4462 (part number 779688-01) is a 3U PXI 24-bit dynamic signal acquisition module (DSA) launched by National Instruments (NI), specifically designed for high-channel-count audio, vibration, acoustics, and NVH testing. It is the mainstream module for 4-channel high-precision synchronous acquisition on the PXI platform. Core feature: Single slot integrates 4 high-precision synchronous acquisition + IEPE sensor conditioning + programmable filtering, replacing multiple independent acquisition cards and conditioning units. Suitable for multi-channel synchronous testing, modal analysis, and noise vibration monitoring.