下面是100BASE-TX标准中MLT-3编码的波形，出错的是第（）位，传送的信息编码为( 此空作答)
- A.1111111
- B.0000000
- C.0101010
- D.1010101
正确答案及解析
正确答案
解析
MLT-3编码采用的编码规则是差分编码机制，即与上一位有电平变化表示1，无变化表示0，另外变化规则需要满足依次：正0负0正0负0正....所以第5位错误，正电平应该改为负电平。传送的信息码的第2位至第7位是111111，第一位无法判断，但是根据选项，只有A符合要求。
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