WCDMA 资料WCDMA电磁干扰测试指导书Word文档下载推荐.docx

WCDMA 资料WCDMA电磁干扰测试指导书Word文档下载推荐.docx

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WCDMA电磁干扰测试指导书

（仅供内部使用）

拟制:

王德凯日期：

审核:

何峰明、胡明超、胡文苏、万亮、谢智斌

日期：

秦燕、王纯桂日期：

批准:

日期：

华为技术有限公司

版权所有XX

目录

1概述.......................................................................................................................................8

2测试仪器准备.........................................................................................................................8

3清频操作过程.........................................................................................................................9

3.1确定测试方位...................................................................................................................9

3.2仪器参数设置.................................................................................................................10

3.3干扰搜索........................................................................................................................10

3.3.1上下行定点干扰测试过程.........................................................................................10

3.3.2下行驱车干扰测试过程（可选）...............................................................................18

4干扰查找操作过程................................................................................................................19

5干扰数据分析.......................................................................................................................19

6附录.....................................................................................................................................20

6.1YBT250..........................................................................................................................20

6.1.1仪器简介..................................................................................................................20

6.1.2仪器基本性能和用户界面.........................................................................................21

6.1.3仪器操作说明...........................................................................................................33

6.2常见干扰设备.................................................................................................................53

6.2.1FDDWLL.................................................................................................................54

6.2.2TDDWLL（PHS/DECT）............................................................................................54

6.2.3GSM基站.................................................................................................................55

6.2.4微波传输..................................................................................................................55

6.2.5直放站......................................................................................................................56

6.2.6其它原因..................................................................................................................56

6.3各频段干扰要求..............................................................................................................56

6.4各组件指标.....................................................................................................................59

6.4.1频谱仪......................................................................................................................59

6.4.2FILTER....................................................................................................................61

6.4.3低噪放大器LNA........................................................................................................62

6.4.4天线..........................................................................................................................62

表目录

表1测试前需要准备的仪器和资料...............................................................................................9表2YBT250关键参数.................................................................................................................10表3频段扫描测试参数设置........................................................................................................10表4SPAN=60MHz上行干扰测试参数设置.................................................................................12表5SPAN=60MHz下行干扰测试参数设置.................................................................................12表6SPAN=5MHz上行干扰测试参数设置...................................................................................14表7SPAN=5MHz下行干扰测试参数设置...................................................................................14表8采用Spectrogram方法SPAN=10MHz上行间歇干扰测试参数设置.....................................16表9SPAN=10MHz下行间歇干扰测试参数设置..........................................................................16表10采用Spectrum方法SPAN=10MHz上行间歇干扰测试参数设置........................................17表11采用Spectrum方法SPAN=10MHz下行间歇干扰测试参数设置........................................17表12下行驱车干扰测试参数设置..............................................................................................18表13采用Spectrum方法SPAN=5MHz下行驱车干扰测试参数设置..........................................18表14YBT250的基本性能...........................................................................................................21表15YBT250频谱仪SPAN和RBW的对应关系...........................................................................21表16YBT250测量窗口中的公共按钮和图标...............................................................................43表17WCDMA码域功率测量显示项............................................................................................47表18我国在1.8GHz及1.9GHz频段的规划表.............................................................................53表19影响UE接收的干扰要求....................................................................................................57表20NodeB接收的干扰要求......................................................................................................58表21常见干扰测试频谱仪.........................................................................................................59表22YBT250频谱仪SPAN和RBW的对应关系...........................................................................60表23上行和下行带通滤波器指标..............................................................................................61表24低噪放大器指标................................................................................................................62表25八木天线的主要技术参数..................................................................................................62

图目录

图1电磁干扰测试全频段扫描示意图...........................................................................................8图2电磁干扰测试所用频段干扰测试示意图.................................................................................8图3连接LNA时在YBT250中设置增益.......................................................................................11图4Trace2的调用设置窗口........................................................................................................13图5存在间歇干扰的三维频谱图................................................................................................17图6YBT250电池的安装与拆卸...................................................................................................23图7YBT250外部100to240V电源或者车载电源供电................................................................24图8YBT250的开关指示.............................................................................................................25图9YBT250的输入端口.............................................................................................................26图10YBT250操作流程图...........................................................................................................34图11连接LNA时在YBT250中设置增益.....................................................................................34图12YBT250Spectrum模式......................................................................................................35图13YBT250Spectrogram模式.................................................................................................35图14YBT250Markers及测试频点信息......................................................................................36图15YBT250调用以前保存Trace的Trace2设置窗口..................................................................37图16YBT250间歇干扰测试时长设置........................................................................................38图17YBT250间歇干扰出现时间...............................................................................................39图18Noise模式测试结果...........................................................................................................40图19Identify模式测试结果.........................................................................................................41图20Strength模式测试结果.......................................................................................................42图21AudioDemod模式测试结果...............................................................................................43图22YBT250RF功率测试.........................................................................................................44图23YBT250功率峰均比测试..................................................................................................45图24YBT250载波频率测试......................................................................................................45图25YBT250占用带宽测试........................................................................................................46图26YBT250WCDMA信号质量测试.........................................................................................46图27YBT250WCDMA码域功率测试.........................................................................................47图28YBT250中设置扰码...........................................................................................................48图29WCDMA三维码谱测试............................