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CATV 系统目前已广泛应用,但在使用中也存在不少问题,这就是各种干扰,直接影响整个系统的质量等级,因此研究这些干扰的成因,对进一步克服由此而产生的干扰和提高 CATV 系统的质量都会有益。本文通过数学推导,说明信号通过非线性元件,或者由于放大器偏离了正常的工作范围,而到了非线性区域,引起输出信号的非线性失真,从而出现了相互调制和交扰调制,并提出克服这些干扰的相应措施。
CATV system has been widely used, but there are many problems in use, which is a variety of interference, a direct impact on the quality of the entire system level, so to study the causes of these interferences, to further overcome the resulting interference and improve the CATV The quality of the system will be beneficial. In this paper, through mathematical derivation, it shows that the signal passes through the non-linear element, or because the amplifier deviates from the normal operating range, and reaches the non-linear region, causing the nonlinear distortion of the output signal, resulting in mutual modulation and crosstalk modulation. Interference corresponding measures.