电缆中的对绞起什么作用
发布日期：2019-06-08 14:29:42
志合电线电缆-线缆行业前沿资讯，线缆知识百科，谢谢关注。部分文章来自于网络，如有侵权，请友好告知，我们会第一时间删除，谢谢！
每对不同的绞距,它是用来区分开每对线传输时的磁场间效应,减少相邻对间的影响。双绞线之所以要进行对绞，原因就是为了避免串绕的影响。
当传输线路中存在有若干个线对(双绞线为四个线对)且传输线路较长，由于每对线构成的回路面积太大，线对之间的串扰和外界干扰都非常严重。为了减小线对之间的串扰及外界干扰，只能采用 "交叉"技术，即将平行传输的线对按照一定的紧密度相互绞合。这样，就能够将每个线对构成的回路分割成若干个小的回路，每个回路中感生的串扰和干扰可以相互抵消一部分，从而达到减小串扰和干扰的效果。所以，每单对双绞线的绞结越紧密，绞距越均匀，四对线绞距差越大,其低频抗干扰能力越强、线对内部的串扰越小，传输数据的性能也就越好。
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