摘要
通过对数传电缆结构和数据传输特性的分析,说明数传电缆故障点阻抗特性的变化是产生时域反射(Ti meDomain Reflectometry——TDR)信号的根本原因,可对正常传输的数据信号造成一定干扰。应用DSP-2000网络测试分析仪对数传电缆故障点时域反射信号的测试分析,可以看出数传电缆断裂处芯线的连接方式、焊接质量以及电缆使用中产生的形变均可产生TDR反射信号,这是维修中所必须要重视的问题。
Based on the analysis of the data transmission cable structure and transmission characteristic, we know that impedance changes of cable fault point is the root cause of the TDR（Time Domain Reflectometry）signal, these changes may bring interference to the normal transmission data signals. Applied DSP-2000 network test analyzer to the cable fault point of TDR signal, we can see that TDR reflected signal can be generated by the breaks in the cable and welding quality as well as cable deformation arising. This is a maintenance issue needing attention.
出处
《物探装备》
2011年第3期197-201,共5页
Equipment for Geophysical Prospecting
