The National Instruments 778279-03 PXI Sound and Vibration Module is an essential component of the PXI‑4472B system, crafted for precise sound and vibration measurements. This advanced module is equipped with eight analog input channels that deliver 24-bit resolution and support both AC and DC coupling. With a maximum sampling rate of 102.4 kS/s and a low cutoff frequency of 0.5 Hz, it employs delta-sigma modulation technology to provide an extensive dynamic range. The module features sophisticated analog trigger circuitry, enabling accurate tracking of individual input channels and offering versatile triggering options, including window, analog edge, and analog edge with hysteresis.

To facilitate efficient data management, the 778279-03 utilizes PCI mini-MITE for full DMA bus-master data transmission rates ranging from 20 to 30 MB/s, with burst rates reaching up to 132 MB/s. A 1,024-sample analog input FIFO helps prevent data loss during prolonged DMA or interrupt service latency. Integration with NI-DAQmx ensures seamless interaction with other devices and software, streamlining the creation of automated testing systems and complex measurement setups.

The 778279-03 is well-suited for various applications in vibration analysis and audio, including order spectra, order maps, extraction, sound level measurements, frequency response analysis, fractional octave analysis, and power spectra generation. For high-channel-count applications, multiple modules can be synchronized using the PXI star trigger bus, achieving timing accuracy within 1 ns across modules with minimal skew. Key features also include built-in antialiasing filters that automatically adjust to the sample rate and integrated electronic piezoelectric (IEPE) signal conditioning for accelerometers and microphones. The module supports both posttrigger and pretrigger modes, allowing for the digitization of signals surrounding trigger events.