卫星转发器有处理模拟信号和数字信号两类。主要用于数字电视信号的转发。
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而近年来，非法信号多次攻击广播电视卫星转发器，造成了许多不良影响。
In the recent years, some of the TV channels Broadcasted by satellite are attacked by unlawful signal.
从非法信号攻击卫星转发器的原理入手，探讨了有线电视前端卫星信号安全接收的措施，对保证有线电视的安全播出具有重要的参考意义。
This paper discusses the ways how to receive satellite signal safely from the principle of illegal signal attacking satellite repeater. This has important significance for CATV safety transmission.
由中国空间技术研究院开发研制的“鑫诺二号”通信卫星重约5.1吨，星上载有22个转发器。
SinoSat-2, mainly developed and manufactured by the Chinese Academy of Space Technology, weighs about 5.1 tons and has 22 transponders.
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