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.U.2-1 without redriver :眼图测试PCIE GEN3 RMS jitter fail,lan0-lan3 all fail,3.2~3.6ps,走线较短,intel SPEC要求小于3ps
U.2-2 with redriver :眼图测试PCIE GEN3 RMS jitter fail,lan0-lan3 all fail,3.7~4.2ps,走线较长
2.PCIE GEN3 clock test:关于jitter 部分测试pass
3.用测试pass 的PCIE X4 与U.2 做clock 、date 眼图测试 交叉验证:
U.2 clock + PCIE X4 date: RMS jitter pass.2 date + PCIE X4 clock: RMS jitter fail
4.调节DEW,DE,EQ,眼图有变化, RMS jitter still fail
帮忙看下RMS jitter fail与date之间的关系,谢谢!