National Instruments 779307-01 Data Acquisition Module

The 779307-01 is a crucial part of National Instruments' PCI-4461 Model series, which is intended for high-accuracy data acquisition, especially in applications involving sound and vibration. With six gain adjustments to adjust the input range, this module enables simultaneous two-channel dynamic signal creation and acquisition. Integrated electronic piezoelectric (IEPE) conditioning and software-configurable AC/DC coupling are two of its primary features, which guarantee accurate readings from transducers with broad dynamic ranges, such as accelerometers and microphones.

This 779307-01 device is designed for a number of uses, such as machine condition monitoring (MCM), noise, vibration, and harshness (NVH) analysis, audio testing, and automobile testing. It can be used for monitoring and analyzing sound and vibration, and it has two input and two output channels, or four input channels if simultaneous signal production and acquisition is needed.

The analog input channels use ADCs with 24-bit precision, enabling adjustable sampling rates between 44.1 kS/s and 192 kS/s, which are appropriate for common audio applications. They also have a gain amplifier stage that allows gain setting from -20 to +30 dB in 10 dB steps, as well as programmable AC/DC coupling. For the best analog readings, the device may take both single-ended and differential signal connections. In order to avoid aliasing and guarantee precise frequency-domain measurements, the analog inputs are equipped with both digital and analog filters. Comparably, the two channels of analog output with 24-bit resolution provide high-fidelity signal stimulation at software-programmable speeds of up to 204.8 kS/s. Measurements of frequency response are made possible by this output capacity, which also stimulates the system being tested.

Multiple 779307-01 devices can be synchronized with low phase mismatch for applications requiring more channels. There are choices for both digital and analog triggering, and triggers can come from external digital trigger input, PXI trigger bus, RTSI bus, or analog input channels.

Based on the NI-DAQmx driver, the device connects with NI measurement services software to enable automated test systems or integration with other hardware, including modular instruments and multifunction data acquisition (DAQ) products.