摘要
分析卫星地球站上行链路中多路信号源播出时,调制器和中频切换开关有时不能自动进行切换动作的情况,引入通过检测PID码的ASI智能切换开关及有效解决办法,从而保证传输系统不间断播出。
When the system is making use of multiplexer signal in satellite uplink of satellite earth station, modulators and universal switching systems sometimes can＇t switch automatically. For this case, the paper in- troduces ASI automatic switching which can check the existence of PID code in the new system, so that the continuum of TV programs can be ensure.
出处
《中国有线电视》
2009年第4期406-408,共3页
China Digital Cable TV
