翻译：测量是通过向双绞线注入差模信号(DM)，然后测量同一对双绞线返回的共模信号(CM)。
The measurement is made by injecting a differential mode signal (DM) into a twisted pair, then measuring the common mode signal (CM) returned on that same twisted pair.
回波损耗测试是通过向双绞线注入DM(差模信号)然后测试返回的DM信号，然而TCL是测试CM信号。
Except a return Loss measurement is made by injecting a DM signal into the pair and measuring the DM signal returned. Here we are measuring the CM signal returned which is TCL.
差模跟踪技术在低轨卫星下行信号接收中发挥着极其重要的作用。
The differential mode tracking technology plays an important role for receiving signal of low orbit satellites.
在故障发生之前，保证滑模的存在，并以此为条件，通过检测残差信号是否在规定的滑动区内，从而判定是否发生故障。
Before the occurrence of fault, ensures the being of sliding mode, and takes this as condition, by detecting if the residual signal is in the regulation sliding area, estimates whether fault occur.
电路见图5，这种电路在运算电路中相当有用，比如差分对单端的转换，抑制共模信号。
This circuit is shown in Figure 5 and is useful as a computational amplifier, in making a differential to single-ended conversion or in rejecting a common mode signal.
在用偏振度作为反馈信号的动态偏振模色散补偿系统中，偏振度与差分群延时的关系对于准确快速的动态偏振模色散补偿很重要。
It is important to know how does the degree of polarization (DOP) change with differential group delay (DGD) when DOP is feedback information for adaptive PMD compensation.
用迈克尔逊干涉仪两臂光程差来补偿两个偏振模的光程差的方法探测传感信号。
The sensing signal is detected by means of compensating the optical path difference of the two orthogonal polarization modes by two arms path difference of Michelson interferometer.
这种类型的干扰一并来到两个差分输入端，因而出现一个共模信号。
This type of interference is induced equally into both differential inputs, and therefore appears as a common-mode signal.
从分析传导测试原理入手，建立了针对差模干扰信号的一阶滤波器的电路等效模型；
By the way of analyzing the transmit test principle, the model of the first-order filter in allusion to DM interface signal are established;
从分析传导测试原理入手，建立了针对差模干扰信号的一阶滤波器的电路等效模型；
By the way of analyzing the transmit test principle, the model of the first-order filter in allusion to DM interface signal are established;
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