THE RGB TO DVI(/VGA) CONVERTER
36
6.2 Setup Instructions for RGB Input
This procedure is designed to correct for discrepancies in the video signal due to
analogue/digital video conversion by the RGB to DVI(/VGA) Converter. You do not need to
follow this procedure if you have a digital signal, connected to the RGB to DVI(/VGA)
Converter. In this case, the video signal is already converted into a digital format and digitally
processed through the RGB to DVI(/VGA) Converter.
If you are using a TFT monitor at RGB to DVI(/VGA) Converter with a VGA cable, you
should carry out the Monitor Setup procedure first (see page 34). In this configuration, the
TFT digitize the video data stream and affect video quality. By setting up the TFT monitor,
you ensure that you are correcting discrepancies due solely to the RGB to DVI(/VGA)
Converter in this procedure. Alternatively, you could replace the TFT monitor with a CRT
monitor while you carry out this procedure or use a TFT with DVI-cable. You can then
reconnect the TFT monitor and optimize its video image afterwards.
1.
Display from your graphic source a picture with as much detail as possible. If possible,
display a ‘burst-pattern’ (see Figure 17) - a picture with alternating, 1-pixel wide, black
and white, vertical stripes.
If you are unable to view the test card, display some black text on a white background.
For example, you could open Notepad, maximize it to full screen, and fill the page with
letter ‘I’s in a 12pt
sans serif
font. Proceed with step 2.
2.
Display the OSD (see page 23).
3.
Select the Image menu option:
4.
Select the first command icon:
Automatic detection of number
of pixels per line and the best phase
.
5.
Assess the desktop test pattern. If the vertical stripes are sharp and without jitter or
smearing, the adjustment has been successful. Go to step 9.
6.
If the picture quality is not acceptable after the automatic adjustment, you will have to
manually adjust the pixel clock and pixel phase (in this order).
7.
With a poorly adjusted pixel clock you may see one or more vertical areas, where the
lines are smeared (see Figure 17a):
a.
Return to the OSD utility and select the menu command:
Manually adjust the number of pixels per line (Pixel clock)
from the Image menu.
b.
Adjust the pixel clock value until all stripes have disappeared.
c.
Confirm the setting.
Summary of Contents for RGB2VGA
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