如题所示!!!!在线等大神。^-^
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我的是在接入信号线后就会有正弦波,不接的话就没有,频率大概是240khz,请问下这是属于自激吗?还是说是由于接地不好引起的,其它的板卡都是没问题的,只有这块是这样,求解啊!!!