In order to solve the VGA signal transmission over long distances, the image ghosting, color distortion and other issues, is designed for network flat panel display and large screen curtain wall display advertising projects, industrial automation control, medical equipment, security monitoring, multimedia teaching and other display systems engineering in the demand for high-quality VGA video signals transmitted over long distances and professionally designed set of VGA signal conversion, distribution, Driving, receiving and restoring functions as a signal transmission system. It can be VGA signals through the unshielded Category 5 network cable balanced transmission to enhance the *** modal noise and interference signal suppression, while significantly saving the cost of wire and simplify the project wiring. Using patented technology to encode H and V signals to the RGB signals on the weighted processing and then sent, only the use of CAT-5 cable three pairs of twisted pair to complete the balanced coding and decoding VGA, SVGA, SXGA, XGA, SXGA, SXGA, RGBHV signals, and the use of long-distance high-frequency compensation for the weighted processing, bandwidth of up to 350 MHz. so that the XGA (up to 1600 * 900/60Hz) transmission distance of up to 300 meters. ) transmission distance up to 300 meters to meet the needs of large-scale engineering projectors, monitors, TFT-LCD TV, PDP signal transmission. As the whole transmission system adopts the patented technology of balanced transmission with weighted zero-value splitting, the twisted pair cable will not cause EMI interference to the outside world when transmitting signals. The transmission distance can be adjusted by setting the dip switches.
VGA
The VGA terminal is also known as the D-Sub connector; the VGA connector is a D-type connector with 15 pins, divided into three rows of five pins each.
The VGA connector is the most widely used connector on graphics cards, and the vast majority of graphics cards come with this type of connector. The VGA port on a DVD player can be easily connected to a computer monitor to display images on the computer's display.
The VGA interface still transmits analog signals, for the display of digitally generated image information, through the digital/analog converter into R, G, B three primary color signals and line and field synchronization signals, signals transmitted through the cable to the display device. For analog display devices, such as analog CRT monitors, the signal is sent directly to the appropriate processing circuitry, drive and control the picture tube to generate images. For LCD, DLP and other digital display devices, display devices need to configure the corresponding A/D (analog / digital) converter, the analog signal into a digital signal. After the D / A and A/D2 conversion, inevitably caused by the loss of some image details. VGA interface used in CRT monitors is not wrong, but used in digital TVs and other display devices, the conversion process of the image loss will make the display effect slightly reduced.