在设计明线多路载波机时,为了使线路和终端设备很好地匹配,对力向滤波器和线路滤波器的阻抗提出很高的要求。在这种情况下,使用一般的二级阻抗滤波器便不再能满足国际标准的要求,而必须使用阻抗级数更高的滤波器。达样就产生了如何根据预定的阻抗要求来 In designing a multichannel carrier of a bright line, high demands are placed on the impedances of the force-to-filter and the line filter in order to make the line and the terminal equipment well matched. In this case, the use of a general secondary impedance filter can no longer meet the requirements of international standards. Instead, filters of higher impedance series must be used. How to produce a sample according to the predetermined impedance requirements