THE RGB TO DVI(/VGA) CONVERTER
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6.3 Setup of a new Video Mode
The RGB to DVI(/VGA) Converter is preinstalled with several video modes and screen
resolutions in various refresh rates suitable for using with an RGB source. If the mode
generated by your RGB graphic source is not represented, you need to Setup a custom mode.
The steps are similar to
6.2 Setup Instructions for RGB Input.
Your custom mode is stored
automatically and can be used in the same way as the preinstalled modes.
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 Scale Mode Menu (Physical Resolution of attached Screen – see page 29) and
select the size of your used monitor (resolution must be equal or higher than the
resolution, generated by your graphic card)
4.
Select the Output Scaling Submenu (see page 30). Select
NO SCALING
– Mode (1:1)
5.
Select the Video Mode Submenu (see page 35). Try-out all available modes and select
the best matching one (all rows and all columns of your screen picture are displayed)
6.
Select the Image menu option (see page 32)
7.
Select the command icon:
Automatic detection of number
of pixels per line and the best phase
.
8.
The picture size may have been changed! Assess the desktop test pattern. If the vertical
stripes are sharp and without jitter or smearing, the adjustment has been successful. Go
to step 12.
9.
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).
10. With a poorly adjusted pixel clock you may see one or more vertical areas, where the
lines are smeared (see Figure 17a on page 39):
a.
In the Image menu option (see page 32) select the command icon:
Manually adjust the number of pixels per line (Pixel clock)
b.
Adjust the pixel clock value until all stripes have disappeared.
c. Confirm
the
setting.
Summary of Contents for RGB2VGA
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