The National Instruments 779748-01 PXI Sound and Vibration Module, also known as the PXI-4496, is a high-performance device designed for demanding applications requiring high-channel counts. This module offers 16 AC-coupled input channels, each equipped with 24-bit delta-sigma analog-to-digital converters (ADC) to ensure precision in measuring signals from microphones, accelerometers, and other transducers with wide dynamic ranges. With a maximum sample rate of 204.8 kS/s and the ability to perform simultaneous sampling across all channels, the module guarantees measurement accuracy. It features built-in antialiasing filters that adapt automatically to the sample rate, and software-selectable input gains up to 20 dB, accommodating input voltage ranges from ±1 V to ±10 V.

The 779748-01 incorporates comprehensive IEPE signal conditioning with options for constant current at 0 or 4 mA, along with robust overvoltage protection for both positive and negative terminals. Designed for reliability, the module's input impedance is 10 MΩ, minimizing loading effects on signals being measured. The onboard FIFO buffer supports up to 4,095 samples, and the module provides flexible triggering capabilities through both analog and digital triggers, supporting programmable levels and slopes for analog triggers and compatibility with TTL signals for digital outputs.

The module operates effectively in a temperature range of 0 °C to 55 °C and can withstand storage temperatures from -20 °C to 70 °C. It is rated for operation at altitudes up to 2,000 meters and can tolerate operational shocks of up to 30 g, along with a vibration tolerance range of 5 Hz to 500 Hz (0.3 g) during operation and up to 2.4 g in non-operational conditions. The NI 779748-01 adheres to stringent safety and electromagnetic compatibility standards, including IEC 61010-1, EN 61010-1, UL 61010-1, and CSA 61010-1, ensuring reliable performance in various environments. With dimensions of 16 cm x 10 cm (6.3 in. x 3.9 in.) and a weight of 326 g (11.5 oz.), this module is suitable for integration into existing PXI and PXI Express systems, delivering optimal sound and vibration measurement capabilities.