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请问opa695出现的一下问题是怎么回事



观察射频信号 用示波器探头与sma转bnc线观察出现截然不同的结果 一个示波器探头在40M时衰减了0.8 sma增大了两倍

示波器探头带宽100 示波器带宽300

负载50欧 695输出50欧