传输系统出现故障的分析与解决方法（Failure analysis and solution of transmission system）.docVIP

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传输系统出现故障的分析与解决方法（Failure analysis and solution of transmission system）.doc

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传输系统出现故障的分析与解决方法（Failure analysis and solution of transmission system）

传输系统出现故障的分析与解决方法（Failure analysis and solution of transmission system） Apple of Sodom. Several early warblers fight for the warm tree, whose new pecking Chunni yan. The nocturne smelled willow, who can not afford home feeling. Exposed ambition, known to all. Heaven can be overturned, human right is the vicissitudes of life. Failure analysis and solution of transmission system The transmission system of television monitoring is usually based on video transmission. Limited to space, only the video transmission under the phenomenon of failure analysis, and put forward some solutions. The most common fault in a and video transmission is the 50 - hour interference. A black bar or white bar appears on the monitors screen and rolls up or down. Most of this phenomenon is caused by the systems bad road, which is caused by the interference of 50 hour power frequency (alternating current). Need to mention that, sometimes because of the camera or the control host (matrix switcher) power bad performance (or damage) will also be the fault phenomenon (sometimes two black bars or white bars), therefore, in the analysis of this kind of fault phenomenon, to distinguish between two different causes of failure. Is to distinguish the power or ground loop problem, a simple method is, in the main control, the nearest access only to a camera output signal power is no problem, if it does not appear the phenomenon of interference on the monitor, the control host is no problem. Next, a portable monitor can be placed near the video output of the front camera and a camera is checked to see if there is a camera interference due to a power problem. If yes, process it. If not, interference is caused by other causes such as earth, loop, etc.. A grainy interference occurred on the B monitor. The appearance of such interference is slight and does not flood normal images, and in severe cases the images cannot be viewed (even destroyed by synchronization). The causes of this phenomenon are more complic