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维护人员在对星站下行系统设备进行维护时,在主用天线LNB输出的第一中频功分器出口插拔L波段射频电缆,可能造成给LNB的供电短路,导致此天线跟踪的RSI信标接收机死机。现象是:信标接收机前面板屏上显示的信标频率为3000MHz,信标接收电平为-105．5dBm,PHASE UNLOCK(相位失锁),FAULT(有错误发生)。由此带来连锁现象是:天线跟踪控制单元OCU
When maintaining the downlink system equipment in the satellite station, the maintenance personnel may plug in and pull out the L-band radio frequency cable at the outlet of the first intermediate frequency power divider output by the primary antenna LNB, which may shorten the power supply to the LNB and cause the RSI beacon tracked by the antenna Receiver crashes. The phenomenon is: Beacon receiver front panel display beacon frequency of 3000MHz, beacon receive level of -105.5dBm, PHASE UNLOCK (phase loss of lock), FAULT (error occurs). The resulting chain phenomenon is: antenna tracking control unit OCU