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行标GY/T122-95规定的有线电视调制器入网技术条件中,视频调制度为87.5%,调制深度过高或过低都会引起彩色视频信号的失真,因此,要求前端技术维护人员对调制器的视频调制度定期测量,并在不产生过调的前提下尽量开足调制度,使调制器输出信号的质量达到最佳。
Cable standard GY / T122-95 provisions of the cable TV network technology conditions, the video modulation is 87.5%, the modulation depth is too high or too low will cause the color video signal distortion, therefore, ask the front-end technical staff on the modulator modulator Video modulation regular measurement, and in the absence of over-modulation as much as possible under the premise of open modulation system, so that the quality of the modulator output signal to achieve the best.