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在维修放大器时 ,通过观察电视图像雪花状噪波的种类 ,辅以检测放大器的输出电平 ,可准确判断出放大器的故障部位 ,并做出快速处理 ,提高维修效率。1 低频段各频道图像“雪花”严重 ,高频段各频道图像正常用场强仪测量放大器的输出电平 ,低、中频段各频道偏低 ,高频段各频道基
In the maintenance of the amplifier, by observing the type of snow flake TV images, combined with the detection of the amplifier output level, can accurately determine the amplifier fault location, and make rapid processing and improve maintenance efficiency. 1 low-frequency images of each channel “snow” serious, high-frequency channel image of each normal use of the field strength meter to measure the amplifier output level, low, mid-band channel is low, high-frequency channel base