一种卫星数传分系统链路数据异常分析

摘要

某卫星数传分系统在轨测试初期,发现数传分系统的延时云图发射机(DPT)数传链路偶尔会有个别轨道接收数据异常.通过仔细观察发生问题时的各种现象,进行了产品地面试验的模拟和对数据的分析研究,找出了发生问题的原因.针对问题,对固态存储器内部时钟晶振加强了环境试验考核,对DPT时钟锁相环晶振电路加以改进完善,提高了电路的稳定性,并进一步用试验验证其有效性,最终提高了数传分系统的环境适应能力和可靠性.%The initial on-orbit testing of a satellite data transmission subsystem shows some accidental abnormal data reception occurs in the DPT data transmission link.Close observation of various phenomena, ground simulation testing of products and analysis of testing data help to find the cause of the problem.Measures are taken to improve the environmental adaptability and reliability of the data transmission subsystem including enhancing the environmental test level of the SSR internal oscillator, and improving the PLL design of the DPT transmitter and further validation testing of the PLL improved design.