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为消除测试电视摄象管分辨率过程中许多可变因素,研制了RCA P-200型测试卡.用这种测试卡测量分辨率,与视频放大器的频率响应无关,而且消除了信号变化或亮度变化对测量的影响.该测试卡便于电子束聚焦,以确保象散最小,而且可分析最好聚焦情况下电子光学系统存在的象散.利用带有这种测试卡的窄频带视频放大器的响应特性,可大大地降低噪声和提高测量的精确废.P-200型测试卡也可用来精确测量高分辨率管予的分辨率.
The RCA P-200 test card was developed to eliminate many of the variables involved in testing the resolution of a television camera tube. Using this test card, the resolution is measured independently of the frequency response of the video amplifier and eliminates the signal variation or brightness The effect of variation on the measurement is that this test card facilitates focusing of the electron beam to ensure astigmatism is minimized and astigmatism in the electronic optical system at best focus can be analyzed.With the response of a narrowband video amplifier with this test card Characteristics, can greatly reduce noise and improve the accuracy of measurement waste.P-200 test card can also be used to accurately measure the resolution of high-resolution tube.