Part Number: 781370-01
The National Instruments 781370-01, also known as the PXIe-4499, is a high-performance 16-input Sound and Vibration Module designed for sophisticated acoustic and dynamic structural testing applications. This module excels in noise, vibration, and harshness (NVH) analysis, making it suitable for extensive microphone array configurations. It features a pseudodifferential input configuration with a 50 Ω connection between the negative input and chassis ground, ensuring robust signal integrity. Each channel offers selectable AC/DC coupling options, providing flexibility in data acquisition tailored to specific needs.

The 781370-01 utilizes a 24-bit delta-sigma analog-to-digital converter (ADC) that ensures exceptional data resolution, with sampling rates that can be adjusted from 100 S/s to 204.8 kS/s. Built-in antialiasing filters automatically accommodate the selected sampling rate, optimizing performance. The module boasts a FIFO buffer size of 4,095 samples, with data transfers managed through Direct Memory Access (DMA) for enhanced throughput. It is designed to handle input voltages of ±10 V and ±1 V, and features overvoltage protection rated at ±30 V and ±5 V, respectively, promoting operational longevity in challenging environments.

With dynamic range capabilities up to 110 dBFS at a gain of 0 dB and a spurious-free dynamic range (SFDR) of 108 dBc, the 781370-01 supports Transducer Electronic Data Sheet (TEDS) technology in accordance with the IEEE 1451 standard, streamlining sensor integration. Physically, the module occupies a 3U CompactPCI slot, with dimensions of 16 cm by 10 cm and a weight of approximately 326 grams. It operates efficiently in ambient temperatures ranging from 0 °C to 55 °C and can be stored at temperatures from –20 °C to 70 °C. Compliance with IEC 61010-1, EN 61010-1, and FCC Part 15B standards highlights its reliability and suitability for both laboratory and industrial applications.