本软件用于NI数据采集卡PXI4498和PXIe6368的同步。其主要是通过共享PXI机箱背板10MHz时钟作为4498的参考时钟和6368的采样时钟时基，然后主任务4498的开始触发信号作为从任务6368的开始触发源。-This software is used to synchronize the NI data acquisition card PXI4498 and PXIe6368 of. Its mainly through shared PXI backplane clock 10MHz reference clock as 4498 and 6368 sampling clock time base, and then the main task begins 4498 as the beginning of a trigger signal　the trigger source for the task 6368.