783087-01/02 PXIe‑4464 BNC/mXLR Dynamic Signal Acquisition DSA Board

PN：783087-01(BNC) / 783087-02(Mini-XLR) The PXIe‑4464 is single-slot 3U PXI Express dynamic signal acquisition (DSA) module specialized for noise, vibration, harshness (NVH), audio testing and machinery condition monitoring. It integrates four fully synchronized differential analog input channels with independent 24-bit delta-sigma ADCs to eliminate phase skew across multi-sensor arrays. Key core performance: max sampling rate 204.8 kS/s, industry-leading 119 dB dynamic range, six software-selectable gain settings (-20 / -10 / 0 / 10 / 20 / 30 dB) covering ±42.4 Vpk down to ±0.316 Vpk full scale. Each channel independently configurable AC/DC coupling with fixed 0.72 Hz high-pass cutoff, plus auto-tracking anti-aliasing filters that adjust cutoff frequency according to sampling rate to suppress aliasing distortion automaticallyNI. Onboard integrated IEPE constant current excitation (up to 20 mA per channel) powers accelerometers, microphones and piezoelectric sensors, maintaining signal integrity over long sensor cables. Native TEDS transducer electronic data sheet auto-reads sensor calibration parameters to eliminate manual setup error. Supports differential/pseudo-differential input mode per channel, 1023-sample hardware FIFO buffer for lossless continuous streaming via DMA. Front panel offers two connector variants: BNC or Mini-XLR for flexible sensor wiring. Native PXIe timing & star trigger enables multi-card coherent synchronous measurement for large microphone arrays and multi-axis vibration test benches. Controlled by NI‑DAQmx driver, compatible with Windows and LabVIEW Real-Time OS, widely deployed for automotive NVH, loudspeaker audio test, rotating machinery fault diagnosis, aerospace structural vibration and lab acoustic research.

Four fully independent simultaneous sampling ADCs ensure zero phase offset between multi-point vibration, microphone array signals, a critical feature for modal analysis and NVH source localization unavailable on multiplexed multifunction DAQ cards. 119 dB ultra-wide dynamic range simultaneously captures faint low-level acoustic noise and large shock vibration without gain switching during long-duration unattended testing. Built-in IEPE 20 mA excitation eliminates external sensor power supply hardware, simplifying test bench wiring for accelerometer and microphone measurement. TEDS automatic sensor recognition loads sensitivity, serial number and calibration data directly to software, avoiding human error during multi-sensor array setup. Auto-tracking anti-aliasing filters remove manual filter configuration work, guaranteeing consistent measurement accuracy across all sampling frequencies. Independent per-channel AC/DC coupling supports both dynamic vibration AC signals and static DC strain/voltage measurement in one module. PXI backplane synchronous clock & trigger bus cascades multiple PXIe‑4464 modules to expand channel count for large-scale vehicle NVH and structural vibration test systems. Standard NI‑DAQmx plus Sound and Vibration Suite deliver pre-built FFT, octave analysis, order tracking and modal measurement libraries, drastically cutting LabVIEW NVH/audio test program development cycle compared to generic DAQ devices. Compact single-slot modular design reserves abundant chassis expansion slots for signal generation, switching and power measurement instruments.

Supports Windows 7/10/11 32/64-bit and LabVIEW Real-Time OS; fully compatible with LabVIEW, LabWindows/CVI, TestStand, NI‑DAQmx driver, Sound and Vibration Measurement Suite, NI MAX, supports C/C++/.NET/Python/MATLAB secondary development.

Automotive vehicle interior/exterior NVH noise vibration harshness testing, loudspeaker & headphone audio distortion/acoustic performance measurement, rotating machinery bearing fault vibration monitoring, aerospace structural multi-point modal vibration analysis, industrial equipment shock & transient vibration capture, microphone array acoustic source localization, laboratory piezoelectric sensor dynamic signal research, household appliance noise quality inspection.