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在方案里看到避免自激振荡和极间干扰的问题，前后级用同轴电缆和BNC插头相连，请问专家这个怎么用，会不会有衰减，我没用过，请求指导
用同轴电缆和BNC插头相连的话就需要对同轴电缆的特性电阻（50欧）进行阻抗匹配，必然要发生衰减
我昨天那个问题还没有解决啊，请问怎么办啊，现在两级在一级衰减严重
