YD/T 1244 - 2002

     1 ' 1  D
中华人民共和国通信行业标准
丫D/ T  1 2 4 4 - 2 0 0 2
数字用户线( x D S L ) 设备电磁兼容性要求
              和测量方法
R e q u i r e me n t  a n d  me a s u r e me n t  me t h o d s  o f  e l e c t r o ma g n e t i c  c o mp a t i b i l i t y  f o r
x DS L  e q u i p me n t
2 0 0 2 - 1 2 - 1 0发布 2 0 0 2 - 1 2 - 1 0实施
中华人民共和国信息产业部 发布丫Di叮1244-2002
目次
前言·.......................................................................................................................... 11
1范围····················································································································……1
2规范性引用文件····································································································..……1
3缩略语························································································。·························……1
试验布置和运行条件································································································……2
4.1试验布置······································································································……2
4.2运行条件······································································································……3
性能判据·.................................................................................................................... 3
5.1性能判据A(连续现象)····················································································……3
5.2性能判据B(瞬态现象)·························································。·························……’4
5.3性能判据C(中断现象).......................................................................................... 4
适用性··················································································································……4
6.1骚扰测量···············。··。。。·················································································……4
6.2抗扰度试验···，·······························································································……4
7骚扰测量方法和限值
7.1机箱端口辐射骚扰(0.009-30 MHz)·····································································……5
7.2机箱端口的辐射骚扰(30-1000 MHz)··································································……5
7.3直流电源输人端口的传导骚扰·································································一。……6
7.4交流电源输人端口的传导骚扰································································.........…… 7
7.5电信端口的传导骚扰··········································································.··..··.··...…… 7
7.6信号线的干扰功率······································································.................……8
7.7谐波电流······································································································……9
7.8电压波动和闪烁···········································································..·....·..........……9
抗扰度试验方法和等级··················，·······················································。···············...……9
8.1静电放电抗扰度试验·············································，·········································……9
8.2辐射骚扰抗扰度试验························································........................……。……9 000 召 .11勺
1
电快速瞬变脉冲群抗扰度试验
浪涌(冲击)抗扰度试验·…
传导骚扰抗扰度试验
工频磁场抗扰度试验
电压暂降和短时中断抗扰度试验········································································……nYD/ 叮 1 2 4 4 -2 0 0 2
前 言
     本标准的制定主要参考了E N  3 0 0  3 8 6 - 2 0 0 2《 电信网络设备的电磁兼容性要求》 、N B 3 0《 电信准则官
方公报》 、G B 9 2 5 4 - 1 9 9 8《 信息技术设备的无线电骚扰限值和测量方法》 、G B / T  1 7 6 1 8 - 1 9 9 8《 信息技术设
备的抗扰度限值和测量方法》等标准。由于国际上没有对应的相关标准，所以本标准主要根据我国通信的
实际情况选取试验项目和试验等级。
     本标准由信息产业部电信研究院提出并归口。
     本标准起草单位:信息产业部通信计量中心
                     东方通信股份有限公司
                     深圳市中兴通讯股份有限公司
     本标准主要起草人:肖 雳 刘宝殿 周 锐 张学渊 金美娟 宋祟泣
     本标准委托信息产业部通信计量中心负责解释。丫D/T 1244-2002
数字用户线(xDSL)设备电磁兼容性要求和测里方法
1范围
    本标准规定了xDSL系列设备的电磁兼容性要求及测量方法。
    本标准适用于xDSL的局端和用户端设备，包括HDSL, SHDSL, ADSL和VDSL等。
2规范性引用文件
    下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件，其随后所有的修
改单(不包括勘误的内容)或修订版均不适用于本标准，然而，鼓励根据本标准达成协议的各方研究是否
可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本标准。
    GB 9254信息技术设备的无线电骚扰限值和测量方法
    GB/T 17618信息技术设备的无线电抗扰限值和测量方法
    GB/T 6113-1995无线电干扰和抗扰度测量设备规范
    GB/T 6113.2无线电骚扰和抗扰度测量方法
    GB 17625.1低压电气及电子设备发出的谐波电流限值(设备每箱摘人电流‘16A)
    GB 17625.2电磁兼容限值对额定电流不大于16A的设备在低压供电系统中产生的电压波
                           动和闪烁的限制
    GB/Z 17625.3电磁兼容限值对额定电流大于16A的设备在低压供电系统中产生的电压波动
                           和闪烁的限制
    GB/T17626.2电磁兼容试验和测量技术静电放电抗扰度试验
    GB/T17626.3电磁兼容试验和测量技术射频电磁场辐射抗扰度试验
    GB/T17626.4电磁兼容试验和测量技术电快速瞬变脉冲群抗扰度试验
    GB/1`17626.5电磁兼容试验和测量技术浪涌(冲击)抗扰度试验
    GB/T17626.6电磁兼容试验和测量技术射频场感应的传导骚扰抗扰度
    GB/1`17626.11电磁兼容试验和测量技术电压暂降、短时中断和电压变化抗扰度试验
    IEC 61000-3-4低压电气及电子设备发出的谐波电流限值(设备每相抢人电流>>16A)
    EEC 61000-4-16电磁兼容试验和测量技术0-150kHz传导共模骚扰抗扰度试验
    IEC 61000-4-29电磁兼容试验和测量技术直流电源输人端口电压暂降、短时中断和电压变化
                           抗扰度试验
    EN 300 127大型通信系统的辐射骚扰测量
3缩略语
AC
ADSL
DC
EMC
EUT
HDSL
ISDN
POTS
交流
非对称数字用户线路
直流
电磁兼容性
受试设备
高速数字用户线路
综合业务数字网
普通电话业务丫D/T
单线对高比特率数字用户线路
业务节点接口
用户网络接口
甚高速数字用户线路
试验布t和运行条件
   试脸布f
E U T按照标准的要求配置和运行。
局端设备 用户峭设备
圈 ， x D S L接入系统 ( 带分离登)布，
     具有分离器的典型试验布置见图 1 所示。收发单元和分离器可以是独立的单元或集成在一起。
     对于 H D S L和S H D S L等不具有分离器的系统而言，一条线路只包含一个 D S L收发单元，试验布置如
图 2所示。
局端设备 用户端设备
局端收发单元 线路环回或线路
     模拟器
远端收发单元
SNI
性能分析仪 性能分析仪
圈2  x D S L搜入系统 ( 不带分离.)布，    试验时，必须使用线路模拟器或实际电缆长度进行试验环回。如果本标准中没有特殊规定，承载xD-
SL业务的线缆必须延长距离EUT机箱端口至少4m,
    EUT的信号或控制端口需要连接能激活本端口的辅助设备，其输出端口需要采用标称负载阻抗端接。
为了避免无用信号的影响，对用于监测EUT性能的测量设备应按要求进行测量。
    EUT的试验条件应尽可能地与实际的安装条件接近，布线应与实际过程相一致。除非另有说明和要
求，EUT应安装在支架内或机箱内，并且所有的盖板及接线板应按照正常运行条件放置。
    信号端口分成两种类型:
    —提供电信业务(第三方话务)的主信号端口;
    —仅能被操作员或业务提供者使用的辅助信号端口。例如，用于告警、维护等的端口。
    应有足够数量的端口被正确地端接，以保证试验代表正常的运行条件。而且，所选择的端口应在试
验报告中具体说明。为美观和路由目的的捆扎线缆应当被分开来进行单独测试。
    EUT的接地应按照说明书的要求连接至参考地。
    如果EUT为大型系统，测量布置见EN 300 1270
    连接至EUT的电缆类型应在试验报告中注明。
    试验配置应记录在试验报告中。
4.2运行条件
    试验应在EUT正常供电且尽可能在典型的运行条件下进行。系统必须工作在最大传输速率，满频谱
工作。必须在同步和非同步两种模式下分别进行测试。
    在抗扰度试验时，应通过电缆环回或线路模拟器馈人噪声信号，其电平应比使系统达到1x10-'误码
率的噪声电平低6 dB.
    所有端口应当正常端接或连接到相应的辅助设备。
4.2.1  EUT布f
    EUT的线缆布置、接地、互连和EUT的摆放必须模拟典型应用情况，并且同产品说明书相一致。
    EUT的骚扰最大化或抗扰度最小化的布置通常不会直观明显地得到。在大多数的情况下，需要有所
选择，这可能会重复进行试验。例如:可能需要移动端口电缆或在试验的初始阶段改变 EUT的方向，同
时观察效果，只有正常使用情况下的布置才有可能考虑。
    所选择的布置应当详细地记录在试验报告中，同时必须包括选择这种试验布置的理由。
4.2.2性能分析仪
    性能分析仪和其它辅助设备应当充分地同EUT去藕合，以保证不会因为此类设备的性能而影响到试
验的结果。
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