摘要
结合故障案例,对GSM-R传输电路的时钟性能最大瞬时频偏、最大时间间隔误差(MTIE)、时间偏差(TDEV)3个指标进行分析和测试,以确定是否因时钟恶化,导致GSM-R基站故障。测试结论是时钟信号经SDH传输后仍能满足GSM-R的要求。
Combined with a breakdown case,the greatest instant frequency leaning of clock performance,the most greatest time-gap error or the MTIE,and the time deviation or TDEV of GSM-R transmission circuit are analyzed and tested to determine whether the GSM-R base station breaks down due to the worsening clock.It has been concluded by the test that the clock signal still can satisfy the requirement of the GSM-R after the signal being transmitted via SDH.
引文
[1]TU-T G.823.The control of jitter and wander within digital networks which are based on the 2048kbit/s hierarchy 03/2000
[2]程根兰.数字同步网[M].北京:人民邮电出版社,2001.