YDIT detailed analysis of VGA extender FAQ

Source:YDIT 誉德 Release time:2019/8/31 21:52:55 Views:874

 

(Ultra-thin integrated lifter, paperless conference system) With the popularization of information office, more and more VGA twisted pair extenders are used in industrial control, medical equipment, security monitoring and other fields.
Twisted pair extender is a special drive device for solving image signal (video, computer VGA, HDTV HDTV) in long-distance transmission, because the cable is too long, causing signal loss, blurring, darkening, smearing, etc. It can improve the transmission distance and image quality of composite video, Y/C color difference component video, RGB, RGBHV, YPbPr, YCbCr component video.
VGA twisted pair extenders often encounter image problems during use, such as insufficient clarity, tailing, blurring, color cast, etc. What should I do? Below we give specific solutions to common problems. Generally speaking, after the following processing, satisfactory results will be obtained (ultra-thin integrated lifter, paperless conference system).
First, there are images but the image shakes up and down
1. Cause of failure: Generally, the adjustment of the HV signal adjustment switch of the twisted pair extender is not adjusted.
2. Solution: Slowly adjust the adjustment knob at the far end of the extender to a satisfactory image state with a small screwdriver.
Second, images and fonts have a trailing phenomenon
1, the common causes of failure are roughly several; 1. The crystal head is not pressed well, the contact resistance is large 2. The remote adjustment switch is not adjusted. The RGB amplification of the 3.VGA twisted pair extender is not adjusted, resulting in the transmission of RGB signals. The attenuation in the line is severe. 4. The quality of the network cable is too poor or the distance of the network cable exceeds the distance and distance used, and the quality of the network cable is generally good.
2, the solution: adjust the remote knob, re-squeeze the crystal head, use a good quality crystal head to ensure good contact. Use a good brand network cable (super 5 line is better), the transmission distance is far away, please use our recommendation The branded cable is used to transmit VGA lines using copper core good quality cables to reduce attenuation.
Third, the image appears lack of color, the adjustment switch can not be solved
1. Cause of failure: The VGA interface part of the VGA twisted pair extender has a problem of poor contact. The VGA connector has a signal line or a signal that is grounded or dropped.
2, the solution: check the VGA interface or replace the VGA cable, check whether the contact is bad and test whether it is all-pass, heavy pressure or redo the crystal head. The short tail length is generally the shielded crystal head and the network cable is not properly grounded Problem, workaround, grounding, and using a shielded crystal head.

Fourth, the remote display has no image, the indicator light is not bright
1, the cause of the failure: Generally speaking, the VGA interface is not connected and the cable is a problem.
2, the solution: check the VGA interface and cable part, to ensure smooth and good contact, check the cable and connector are connected and good contact.
Fifth, the image has water ripples
1, the cause of the failure: generally there is strong electromagnetic interference nearby.
2, the solution: the wiring disturbs the interference source, the cloth VGA cable can not be used for cable laying together, the AC interference is easy to crosstalk to the signal cable, and the device power supply crosstalk 50Hz low frequency interference, you can remove the power ground.
Seven, the equipment light is not bright, there is no image
1. Cause of failure: Generally, there is no equipment power supply and equipment is bad.
2, the solution: check whether the 220V power supply of the equipment is powered; the equipment bad equipment manufacturer anti-repair (ultra-thin integrated lift, paperless conference system).