选号式双工制架线调频载波机设计

摘要

本文介绍一种采用导频、锁相环调频、鉴频等技术来实现选号功能的双工制架线电机车载载波机，总机对15台分机能进行选号通信，解决了异频单工制载波机总机与某一分机通话时其他分机也能听到的缺点，提高了载波电话的通信质量。%This paper introduces a duplex stringing motor vehicle carrier which can select signals through a pi-lot, PLL frequency modulation, and frequency discrimination technology. The switchboard operator can communi-cate with 15 extensions by selecting signal, solving the problem of different frequency simplex system carrier ma-chine operator, and a particular extension call can be heard by other ones, and improving the quality of communi-cation carrier telephone.