地铁时钟系统为地铁工作人员和乘客提供统一的标准时间,并为地铁机电设备有关系统提供统一的标准时间信号,使各系统的定时设备与本系统同步,从而实现地铁全线统一的时间标准。本文讨论地铁通信系统的时钟子系统向AFC系统和信号系统提供时钟信号的测试方案,为测试时钟信号提供参考依据。 The subway clock system provides a unified standard time for the subway staff and passengers and provides a unified standard time signal for the relevant system of the metro electromechanical equipment so that the timing equipment of each system is synchronized with the system so as to achieve a unified time standard of the entire subway line. This article discusses the metro communication subsystem clock subsystem to AFC system and signal system to provide a clock signal test program, to provide a reference for testing the clock signal.