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PCB 板上的高速信号特征:XAUI 接口3.125GBd 串行差分信号:60ps,请问需要 多高带宽的示波器才能精确测量?测量误差可达多少?
Technical discuss
PCB 板上的高速信号特征:XAUI 接口3.125GBd 串行差分信号:60ps,请问需要 多高带宽的示波器才能精确测量?测量误差可达多少?
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btt
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25 Oct 2020 12:46
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btt
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对 XAUI 接口 3.125GBd 串行差分信号,听起来有点象 InfiniBand 信号,用正弦内插的 方式,或类似等效采样的方式来采集,但由于本身带宽和触发抖动等因素,在其测量 100ps ~ 130ps 范围内的上升时间时,采用 7GHz 差分探头可保证误差《3%,对于《 80ps 的上升时 间测量,其误差会大于 10%, 虽然这已经是实时示波器中最好的方案,单就上升时间测量而 言,最精确的方案是安捷伦的网络分析仪(需配上物理层分析软件),因为其带宽可高达 50GH z。
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PCB 板上的高速信号特征:XAUI 接口3.125GBd 串行差分信号:60ps,请问需要 多高带宽的示波器才能精确测量?测量误差可达多少?