In order to measure the synchronous delay of the multi-channel high-speed data transmission,a synchro-nous delay measurement system is designed,which moves sampling points with the Input Output Delay Element( IO-DELAYE)and the Mixed-Mode Clock Manager(MMCM)of a FPGA. Thus the sampled data at different sampling points are obtanined. Through analyzing the sampled data with a computer, the unstable sampling points will be found,which can be used to calculate the synchronization delay. Ths usage of the IODELAYE leads to the high pre-cision and the combination of the former with the MMCM makes the system have a wide measurement range. Experi-ments show that the performance of the system is stable with the measurement error less than 0.2 ns,and it’s suitable for the multi-channel high-speed data tramitting.%为了测量多路高速数据传输的同步时延,设计了一种同步时延测量系统,采用FPGA的输入输出延迟单元( IODE-LAYE)和混合模式时钟管理器( MMCM)移动采样点位置,得到不同采样点位置的采样数据,通过计算机分析采样数据,找到传输不稳定的采样点位置,并计算出同步时延。 IODELAYE保证了系统的高精度,通过与MMCM的结合,使系统具有宽量程的特点。测试结果表明,该系统性能稳定,测量误差小于0.2 ns,适用于多路高速数据传输场合。
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