The PCI-6115 is a high-speed synchronous multifunction DAQ (Data Acquisition) board developed by National Instruments, designed for high-precision industrial measurement and stimulus-response testing scenarios. This full-length PCI board features 4-channel 12-bit synchronous analog input with 10 MS/s per-channel sampling rate, paired with dual analog output channels, correlated digital I/O and 24-bit counter modules. It supports an extended ±42 V input range and onboard anti-aliasing filters, effectively resolving signal aliasing, low sampling efficiency and asynchronous data acquisition issues in high-frequency testing. Equipped with large-capacity onboard memory and RTSI bus synchronous triggering function, it realizes multi-device collaborative high-speed data collection. Compatible with NI-DAQmx drivers for simplified configuration and debugging, it delivers stable and reliable testing performance. Widely applied in automotive testing, radar, ultrasonic detection and laboratory automation fields, it provides accurate high-speed measurement solutions for research engineers and system integrators.