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您好,应该是cable长度过长导致,cable长度限制了带宽,cable越长,它的插值损耗越大,那么LMH1297就不能对时钟进行修复。
或者同样长的cable条件下,您换下插值损耗较小的cable再验证一下。
再选择cable时,主要看下cable的插值损耗随频率变化曲线。