The paper describes the mechanism of origination of cross-modulation interference in CATV and a method for fixing it. The formulae on mathematics of cross-modulation interference are derived.
从数学角度出发，推导出了CATV系统交调干扰电平的数学表达式，并阐述了CATV系统交调干扰的产生机理以及排除方法．。
In order to decrease the mirror frequency interference, cross interference and inter-modulation interference, double IF (Intermediate frequency) is adopted in the receiver.
为了降低镜频干扰、交调和互调干扰，接收机采用了双中频方案。
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