| 卫星地球站信号源切换系统的改进 |
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| 引用本文： | 孙宁. 卫星地球站信号源切换系统的改进[J]. 中国有线电视, 2009, 0(4): 406-408 |
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| 作者姓名： | 孙宁 |
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| 作者单位： | 广东省广播电视卫星地球站,广东,广州,510066 |
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| 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问断播出。
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| 关 键 词： | 信号源 ASI自动切换开关 中频切换开关 调制器 |
The Improvement of Signal Switching System in Satellite Earth Station |
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| SUN Ning. The Improvement of Signal Switching System in Satellite Earth Station[J]. China Cable Television, 2009, 0(4): 406-408 |
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| Authors: | SUN Ning |
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| Affiliation: | SUN Ning (The Broadcast Television of Satellite Earth Station of Gongdong, Gongdong Guangzhou 510066, China) |
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| Abstract: | 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. |
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| Keywords: | signal source ASI automatic switching IF switching modulator |
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