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从某种意义上说 ,有线电视工程是一项“接头工程”。随着有线电视覆盖范围的扩大 ,线路的老化 ,因接头原因引起的故障占了很大的比例 ,现将工作中所碰到的几类接头故障作一浅述。接头芯线内缩或接触不良 ,此现象可等效为一只电容 ,根据公式Ｚ =12πｆｃ可知 ,当频率较低时 ,阻
In a sense, CATV is a “joint project.” With the expansion of the coverage area of cable television, the aging of the circuit accounts for a large proportion of failures due to the joint causes, and the failure of several types of connectors encountered in the work is briefly discussed. Connector core shrinkage or poor contact, this phenomenon can be equivalent to a capacitor, according to the formula Z = 12πfc shows that when the frequency is low, the resistance