Digital video converter is mainly used for transmission of video signals, the user may appear in the process of using the image is not clear, there is a snowflake situation, the emergence of this situation is mostly due to the fiber optic link attenuation is too large or the front-end video cable is too long by the AC electromagnetic interference caused by the first to check whether the tail is bent too much, if too much bending is played straight; the second to check the optical port and the end of the box flange connection is not Reliable connection, flange core is broken, etc.; if there is no problem again to check the optical port and tail fiber is too dirty, if too dirty application of alcohol and cotton cleaning to be dry before inserting; Finally, check whether the video transmission line will cause electromagnetic interference of the object, if there is to remove the interference. There may be no video signal at all, then we will do in accordance with the optical transceiver video indicators to do the check, if the receiving end of the channel indicator light is on then check the receiving end to the monitor or DVR and other terminal equipment between the video cable is connected, the video interface connection is loose or have a false soldering and so on; if the receiving end of the video indicator is not lit, check the front-end corresponding channel video indicator light is lit. If the light is on, check whether the fiber optic cable is connected, fiber optic terminal as well as fiber optic terminal box optical interface is loose, if not, check whether the camera is working properly, and the camera to the front-end transmitter video cable is connected reliably.
Video surveillance process, stability is the most important, in the process of failure, we need to be able to find problems in a timely manner, to solve the problem. Ensure the normal monitoring of the video.
If our monitoring video suddenly appeared black screen, we can identify the cause through the following methods. You can first unplug the fiber optic signal, at this time, if the monitoring of the video appeared snowflake video, we can determine the fiber optic is not a problem, at this time, ask us to connect the fiber optic again, at this time to watch the screen, to observe the screen, if the screen is still black, it may be that there are problems with the transmitter, we come to observe the problem of the transmitter, we are still the same way as before, the signal from the optical We still have the previous method, disconnect the signal from the optical transmitter, connected to a normal video monitor, if you can see the video screen, it is our optical transmitter problems.