摘要
E1传输线路在我国通信网络系统中具有广泛的应用,对其传输性能的分析与检测成为维持网络正常运行的关键因素。在对比国内外同类产品的基础上,展开研究开发工作。介绍了一种新型的便携式多功能E1测试仪的设计方案,给出了系统的硬件结构及软件设计方法。系统CPU采用TI公司DSP芯片TMS320VC5409,结合CPLD技术,选取高性能E1收发器芯片作为线路检测芯片,实现对E1线路各项物理性能指标及帧结构的检测分析,并具备抖动测试及远程通信功能。系统软件采用TICCS2.0集成开发环境下的C语言和汇编语言混合编程。着重介绍了E1检测电路设计、系统软件流程、E1测试指标的计算,并给出了基于CPLD和DSP的新型数字式线路信号抖动测试方法。
E1 transmission lines are widely used in communication network systems in our country.Testing and analyzing performance of E1 line become a key factor for network maintenance.Based on the comparison between same products of domestic and overseas,research and development are started.The design method of a new portable multifunctional E1 tester is introduced,with the hardware structure and software programming idea are given.TI′s DSP chip TMS320VC5409 works as system CPU,combined with CPLD technique,and high performance E1 transceiver DS2155 is employed for E1 line testing.Analysis of physical performance and frame structure of E1 line are realized,as well as jitter test and remote communication function.C language and mixed assemble language for software design in TI CCS2.0 are used.Emphases are put on E1 testing circuits,software flow and computation of test index,and a digital method based on DSP and CPLD for jitter testing of E1 line signal is described.
出处
《现代电子技术》
2005年第13期86-88,90,共4页
Modern Electronics Technique
