Nowadays, it is common that some CATV users embezzle CATV signal illegally, delay paying for CATV maintenance management, and destroy CATV transmission network infrastructure intentionally.

当前，有线电视用户采用非法手段盗用有线电视信号、拖欠电视收视维护管理费甚至故意破坏有线电视传输网络设施等违章违法行为还比较普遍。

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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.

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。

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