传输指标测试大全
--------光口、电口、时钟
2004-6-30
第1页,共132页
目 录
1.1
1.2
1.3
1 光口指标............................................................................................................................. 8
平均发送光功率 ............................................................................................................8
1.1.1 指标含义 ...............................................................................................................8
1.1.2 测试仪表 ...............................................................................................................8
1.1.3 指标定义 ...............................................................................................................8
1.1.4 测试步骤 ...............................................................................................................9
消光比...........................................................................................................................9
1.2.1 指标含义 ...............................................................................................................9
1.2.2 测试仪表 ...............................................................................................................9
1.2.3 指标定义 ...............................................................................................................9
1.2.4 测试装置 .............................................................................................................10
1.2.5 测试步骤 .............................................................................................................11
发送机眼图 .................................................................................................................13
1.3.1 指标含义 .............................................................................................................13
1.3.2 测试仪表 .............................................................................................................14
1.3.3 指标定义 .............................................................................................................14
1.3.4 测试装置 .............................................................................................................14
1.3.5 测试步骤 .............................................................................................................15
激光器工作波长 ..........................................................................................................17
1.4.1 指标含义 .............................................................................................................17
1.4.2 测试仪表 .............................................................................................................18
1.4.3 指标定义 .............................................................................................................18
1.4.4 测试装置 .............................................................................................................19
1.4.5 测试步骤 .............................................................................................................19
最大均方根谱宽 ..........................................................................................................20
1.5.1 指标含义 .............................................................................................................20
1.5.2 测试仪表 .............................................................................................................20
1.5.3 指标定义 .............................................................................................................20
1.5.4 测试装置 .............................................................................................................21
1.5.5 测试步骤 .............................................................................................................21
最大-20dB 谱宽...........................................................................................................21
1.6.1 指标含义 .............................................................................................................21
1.6.2 测试仪表 .............................................................................................................21
1.4
1.5
1.6
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1.7
1.8
1.9
1.6.3 指标定义 .............................................................................................................21
1.6.4 测试装置 .............................................................................................................22
1.6.5 测试步骤 .............................................................................................................22
最小边模抑制比 ..........................................................................................................22
1.7.1 指标含义 .............................................................................................................22
1.7.2 测试仪表 .............................................................................................................22
1.7.3 指标定义 .............................................................................................................23
1.7.4 测试装置 .............................................................................................................23
1.7.5 测试步骤 .............................................................................................................23
接收机灵敏度..............................................................................................................23
1.8.1 指标含义 .............................................................................................................23
1.8.2 测试仪表 .............................................................................................................23
1.8.3 指标定义 .............................................................................................................24
1.8.4 测试装置图: ......................................................................................................24
1.8.5 测试步骤 .............................................................................................................25
接收机过载功率 ..........................................................................................................25
1.9.1 指标含义 .............................................................................................................25
1.9.2 测试仪表 .............................................................................................................25
1.9.3 指标定义 .............................................................................................................25
1.9.4 测试装置图: ......................................................................................................26
1.9.5 测试步骤 .............................................................................................................26
1.10 光通道代价 .................................................................................................................27
1.10.1 指标含义 .............................................................................................................27
1.10.2 测试仪表 .............................................................................................................27
1.10.3 指标定义 .............................................................................................................27
1.10.4 测试步骤 .............................................................................................................28
1.11 光输入口允许频偏.......................................................................................................28
1.11.1 指标含义 .............................................................................................................28
1.11.2 测试仪表 .............................................................................................................28
1.11.3 指标定义 .............................................................................................................28
1.11.4 测试装置图: ......................................................................................................29
1.11.5 测试步骤 .............................................................................................................29
1.12 输出抖动 .....................................................................................................................35
1.12.1 指标含义 .............................................................................................................35
1.12.2 测试仪表 .............................................................................................................36
1.12.3 指标定义 .............................................................................................................36
1.12.4 测试装置图: ......................................................................................................36
1.12.5 测试步骤 .............................................................................................................36
1.13 抖动漂移容限..............................................................................................................44
1.13.1 指标含义 .............................................................................................................44
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2.1
2.2
2.3
1.13.2 测试仪表 .............................................................................................................44
1.13.3 指标定义 .............................................................................................................44
1.13.4 测试装置图: ......................................................................................................46
1.13.5 测试步骤 .............................................................................................................46
2 电口指标............................................................................................................................54
输出口信号〔包括 AIS〕比特率 .................................................................................54
2.1.1 指标含义 .............................................................................................................54
2.1.2 测试仪表 .............................................................................................................55
2.1.3 指标定义 .............................................................................................................55
2.1.4 测试配置图..........................................................................................................56
2.1.5 测试步骤 .............................................................................................................56
输出口信号波形和参数 ...............................................................................................59
2.2.1 指标含义 .............................................................................................................59
2.2.2 测试仪表 .............................................................................................................59
2.2.3 指标定义 .............................................................................................................59
2.2.4 测试配置图..........................................................................................................68
2.2.5 测试步骤 .............................................................................................................68
STM-1 输出信号眼图和功率 .......................................................................................69
2.3.1 指标含义 .............................................................................................................69
2.3.2 测试仪表 .............................................................................................................69
2.3.3 指标定义 .............................................................................................................70
2.3.4 测试步骤 .............................................................................................................70
输入口允许频偏 ..........................................................................................................71
2.4.1 指标含义 .............................................................................................................71
2.4.2 测试仪表 .............................................................................................................71
2.4.3 指标定义 .............................................................................................................71
2.4.4 测试配置图..........................................................................................................72
2.4.5 测试步骤 .............................................................................................................72
输入口允许衰减 ..........................................................................................................76
2.5.1 指标含义 .............................................................................................................76
2.5.2 测试仪表 .............................................................................................................76
2.5.3 指标定义 .............................................................................................................76
2.5.4 测试配置图..........................................................................................................77
2.5.5 测试步骤 .............................................................................................................77
输入口抗干扰能力.......................................................................................................81
2.6.1 指标含义 .............................................................................................................81
2.6.2 测试仪表 .............................................................................................................81
2.6.3 指标定义 .............................................................................................................81
2.6.4 测试配置图..........................................................................................................81
2.6.5 测试步骤 .............................................................................................................81
2.6
2.4
2.5
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2.8
2.9
2.7
输入口、输出口反射衰减............................................................................................86
2.7.1 指标含义 .............................................................................................................86
2.7.2 测试仪表 .............................................................................................................86
2.7.3 指标定义 .............................................................................................................86
2.7.4 测试配置图..........................................................................................................86
2.7.5 测试步骤 .............................................................................................................87
输入口、输出口过压保护能力 ....................................................................................87
2.8.1 指标含义 .............................................................................................................87
2.8.2 测试仪表 .............................................................................................................87
2.8.3 指标定义 .............................................................................................................87
2.8.4 测试配置图..........................................................................................................88
2.8.5 测试步骤 .............................................................................................................88
输入抖动漂移容限.......................................................................................................88
2.9.1 指标含义 .............................................................................................................88
2.9.2 测试仪表 .............................................................................................................88
2.9.3 指标定义 .............................................................................................................89
2.9.4 测试配置图..........................................................................................................91
2.9.5 测试步骤 .............................................................................................................92
2.10 输出抖动 .....................................................................................................................95
2.10.1 指标含义 .............................................................................................................95
2.10.2 测试仪表 .............................................................................................................96
2.10.3 指标定义 .............................................................................................................96
2.10.4 测试配置图..........................................................................................................97
2.10.5 测试步骤 .............................................................................................................97
2.11 映射抖动 ...................................................................................................................100
2.11.1 指标含义 ...........................................................................................................100
2.11.2 测试仪表 ...........................................................................................................101
2.11.3 指标定义 ...........................................................................................................101
2.11.4 测试配置图........................................................................................................101
2.11.5 测试步骤 ...........................................................................................................101
2.12 结合抖动 ...................................................................................................................106
2.12.1 指标含义 ...........................................................................................................106
2.12.2 测试仪表 ...........................................................................................................106
2.12.3 指标定义 ...........................................................................................................106
2.12.4 测试配置图........................................................................................................108
2.12.5 测试步骤 ...........................................................................................................108
3 SEC(SDH 设备时钟)指标............................................................................................111
频率准确度 ...............................................................................................................111
3.1.1 指标含义 ...........................................................................................................111
3.1.2 测试仪表 ...........................................................................................................112
3.1
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3.2
3.3
3.4
3.5
3.1.3 指标定义 ...........................................................................................................112
3.1.4 测试步骤 ...........................................................................................................112
牵引入和牵引出范围.................................................................................................113
3.2.1 指标含义 ...........................................................................................................113
3.2.2 测试仪表 ...........................................................................................................113
3.2.3 指标定义 ...........................................................................................................113
3.2.4 测试步骤 ...........................................................................................................113
保持性能 ...................................................................................................................114
3.3.1 指标含义 ...........................................................................................................114
3.3.2 测试仪表 ...........................................................................................................114
3.3.3 测试步骤 ...........................................................................................................114
噪声产生-锁定方式的漂移 ......................................................................................115
3.4.1 指标含义 ...........................................................................................................115
3.4.2 测试仪表 ...........................................................................................................115
3.4.3 指标定义 ...........................................................................................................115
3.4.4 测试步骤 ...........................................................................................................116
噪声产生-输出抖动.................................................................................................117
3.5.1 指标定义 ...........................................................................................................117
3.5.2 测试仪表 ...........................................................................................................118
3.5.3 测试步骤 ...........................................................................................................118
噪声容限-漂移容限.................................................................................................119
3.6.1 指标含义 ...........................................................................................................119
3.6.2 测试仪表 ...........................................................................................................119
3.6.3 指标定义 ...........................................................................................................119
3.6.4 测试步骤 ...........................................................................................................122
噪声容限-抖动容限.................................................................................................122
3.7.1 测试仪表 ...........................................................................................................122
3.7.2 指标定义 ...........................................................................................................123
3.7.3 测试步骤 ...........................................................................................................123
噪声传递 ...................................................................................................................124
3.8.1 指标含义 ...........................................................................................................124
3.8.2 测试仪表 ...........................................................................................................124
3.8.3 指标定义 ...........................................................................................................124
3.8.4 测试步骤 ...........................................................................................................125
短期相位瞬变响应.....................................................................................................126
3.9.1 指标含义 ...........................................................................................................126
3.9.2 测试仪表 ...........................................................................................................126
3.9.3 测试步骤 ...........................................................................................................126
3.10 长期相位瞬变响应.....................................................................................................128
3.10.1 指标含义 ...........................................................................................................128
3.6
3.7
3.8
3.9
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3.10.2 测试仪表 ...........................................................................................................129
3.10.3 测试步骤 ...........................................................................................................129
3.11 输入信号瞬断的相位响应..........................................................................................130
3.11.1 测试仪表 ...........................................................................................................130
3.11.2 指标定义 ...........................................................................................................130
3.11.3 测试步骤 ...........................................................................................................130
3.12 相位不连续性............................................................................................................131
3.12.1 指标含义 ...........................................................................................................131
3.12.2 测试仪表 ...........................................................................................................131
3.12.3 指标定义 ...........................................................................................................132
3.12.4 测试步骤 ...........................................................................................................132
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传输指标测试大全
--------光口、电口、时钟
前 言
传输指标测试大全(光口、电口、时钟)基本上完成了光口(STM-1、STM-
4、STM-16)、电口(1.5M、2M、34M、45M、139M、155M)、时钟三个方面
的内容总结,里面包含了全部指标的含义、定义、现有的测试仪表选择、在各个仪
表上的测试方法等,总共有 2000 种左右的指标测试方法,内容及其丰富和全面。
1 光口指标
1.1 平均发送光功率
1.1.1 指标含义
发送机的发射光功率和所发送的数据信号中“1”占的比例有关,“1”越多,光功率也就
越大。当发送伪随机信号时,“1”和“0”大致各占一半,这时测试得到的功率就是平均
发送光功率。
1.1.2 测试仪表
光功率计
1.1.3 指标定义
1) STM-1 接口
局内、短距:-8dbm ~ -15dbm;
长距 :0dbm ~ -5dbm。
2004-6-30
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