usb4711A数据采集卡的DA转换通道程序，用于数据采集卡将数字两信号转换成模拟信号，在模拟通道输出。

usb4711A数据采集卡的AD转换通道程序，用于数据采集卡进行模数转换-usb4711A data acquisition card channel AD conversion procedures, data acquisition cards for analog-digital conversion

usb4711A数据采集卡的DA转换通道程序，用于数据采集卡将数字两信号转换成模拟信号，在模拟通道输出。-usb4711A Data Acquisition Card DA conversion-track procedure for the data acquisition card will be two digital signals into analog signals in analog channel outputs.