Avlink VX-2088 - Manual (Page 10)

VX Matrix Switching System—User Manual
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pins). The VGA connectors are extensively used in display cards and most display cards have
such connectors.
Presently, most computers connect with external displays via analog VGA connectors. The
computer internally generates digital graphics data to be converted by the graphics card
digital/analog converter into the R, G, and B process color signals, and coutour and gamut
synchronous signals which are transmitted to the display via the cable. Regarding analog display
equipment such as the analog CRT display, the signals are being sent directly to the
corresponding processor circuit and drive the controlling Cathode Ray Tube into graphics display.
Digital displays such as LCD and DLP are usually equipped with A/D (Analog/Digital)
converters to convert analog signals into digital signals. Unavoidably, some losses to graphics
happen after two times of conversion from analog to digital and vice versa. It’s understandable to
use VGA connectors in CRT monitors, but to use it in LCD displays the quality of graphics
display is likely to degrade in the process of conversion.
Different models of the VX matrix system provides a different number of input/output jacks
for users to connect to different video equipment including CD/DVD players, desktop PCs,
graphics workstations, and number displays. The output terminals can be connected to projectors,
video recorders, and computer monitors and so on.
The VX Matrix supports various AV signal sources.
The VX Matrix Connector Connecting Methods as shown in Figure 5-2:
Pin No. Name Description
1 RED Red video signal
2 GREEN Green video signal
3 BLUE Blue video signal
4 n.c. No connect
5 GND Ground
6 RED_RTN Red video signal return
7 GREEN_RTN Green video signal return
8 BLUE_RTN Blue video signal return
9 n.c. No connect
10 GND Ground
11 n.c. No connect
12 SDA I2C data
13 HSYNC Horizontal synchronization signal
14 VSYNC Vertical synchronization signal
15 SCL I2C clock
Figure 5-2 VGA Connection