摘要
文章介绍了风云二号卫星地面应用系统工程高速数据收集平台报告信号(DCPR)接收系统在北京气象站系统预交付联试中表现的天线频繁跟踪以及经过接收变频后的90.9MHz中频信号信噪比测试结果较差问题排查过程和有效的解决方案。问题排查过程主要针对DCPR接收系统射频接收机多个关键检测点进行测试,从测试结果和系统链路组成分析问题原因,并制定了四个具有针对性解决方案,主要是:DCPR接收系统射频接收机自带5MHz锁相晶体振荡器、加强手机信号干扰抑制、降低变频前链路增益、增加变频后链路增益以满足系统使用要求。最终将以上解决方案应用到风云二号卫星地面应用系统工程高速数据收集平台报告信号(DCPR)接收系统中,问题得到了很好解决。
The searching procedure and effective resolution of DCPR＇s receiving antenna continual tracking and imper-fection Signal-to-Noise Ratio about IF output signal 90. 9MHz is presented in this paper. The searching procedure is mainly＆nbsp;aimed at RF receiver＇s some key test points of DCPR＇s receiving system. The reason of the problem is analyzed according to test results and system link composing. And four resolutions have been constituted. Firstly, mobile phone signals must be controlled. Secondly, the gain of link before mixer should be depressed. Thirdly, the gain of link after mixer should be in-creased in order to meet the needs of system applications. Finally, RF receiver of DCPR receiving system should be com-posed of 5MHz PLL crystal oscillator. Ultimately, the above problem is commendably resolved.
出处
《空间电子技术》
2014年第4期60-64,共5页
Space Electronic Technology
