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National Instruments PXIe-4498 PXI Sound and Vibration Module

The NI PXIe-4498 (Part Numbers: 780218-01 and 780218-02) is created especially for high-channel count sound and vibration applications, such as noise, vibration, and harshness analysis, dynamic structural test, and huge microphone arrays. This Sound and Vibration Module has 16 analog inputs, which are simultaneously buffered, amplified, analog filtered, and sampled by a 24-bit delta-sigma analog-to-digital converter that completes digital filtering with a cutoff frequency that automatically alters to a software-programmable sampling rate. The high resolution of the PXIe-4498 delivers the preciseness required for audio and vibration analysis applications.

The 16 input channels on the National Instruments PXIe-4498 module utilize analog and digital filters applied in hardware to stop aliasing. The signals are initially passed through fixed analog filters to get rid of signals with frequency parts out of the range of the ADCs. This special construction means that the user does not have to add more external filters to thwart aliasing.  The NI PXIe-4498 Sound and Vibration Module has analog and digital signal triggering for acquisition with two different modes. Trigger sources can come from any of the analog input channels, the external digital trigger input, or the PXI trigger bus. The external digital trigger is 5 V TTL/CMOS-compatible and is activated by a decision of rising or falling edge. While this Sound and Vibration Module is utilized in the start trigger mode, the PXIe-4498 obtains signals only after the trigger condition has taken place. Triggering is frequently utilized in applications with transient signals.