Adder Technology X2 manual Skew adjustment, To use skew adjustment

Capsk Loc

l Scrolk Loc

Capsk Loc

Capsk Loc

l Scrolk Loc

l Scrolk Loc

Skew adjustment

The twisted pair cabling supported by the X2 Dual Access modules (category 5, or higher) consists of four pairs of cables. Three of these pairs are used by the

modules to convey red, green and blue video		1 2 3 4 5 6 7 8
signals to the remote video monitor. Due to the
slight difference in twist rate between these
three pairs, the red, green and blue video signals
may not arrive at precisely the same time. This
is visible as separate colour shadows on high
contrast screen images. This effect is particularly	8	8	Data signal
apparent when using higher screen resolutions	7	7
	6	6	Red
and some types of category 5e cables.
	3	3	video signal
In this situation, the X2 Dual Access modules	5	5	Green
	4	4	video signal
provide internal skew adjustment that can help	2	2	Blue
to rectify the situation. The skew adjustment	1	1	video signal

works by delaying or advancing the timing of any of the red, green or blue colour signals so that they are all delivered to the monitor at precisely the same time. For best results a test pattern is provided and this should be displayed when using skew adjustment.

To use skew adjustment

1Insert the supplied Adder Installation CD-ROM into the CD player of the computer.

2Within Windows, use the My Computer option (usually available as a desktop icon or within the Start menu) to view the contents of the CD-ROM. Double-click the Skew entry to display the standard test pattern. If necessary maximise the application window so that the image fills the screen.

4 As appropriate, press either the R, G or B keyboard keys to select the appropriate colour channel. Corresponding keyboard indicators will flash rapidly to show which channel is currently selected

for adjustment: Num Lock for Red, Caps Lock for Green and Scroll Lock for Blue.

Numk

Loc

Numk

Loc

Numk

Loc

5 Press the and keys to retard or advance the timing of the selected colour channel respectively. On screen you will see a change in the position of the selected colour crosses in relation to the other two.

Restore default skew settings

Exit image
controls	Advance
and save	colour

   

The screen will show a series of fine red, green and blue crosses which should all be in line, vertically and horizontally. Skew affects the horizontal placement of the colours and using this pattern it is much easier to discover which, if any, colours are being adversely affected by the twisted pair cable run.

3Simultaneously, press the hotkeys (by

default, and ) along

with to enter configuration mode.

The three keyboard indicators (‘Num Lock’, ‘Caps Lock’ and ‘Scroll Lock’) will now begin to flash in sequence.

Convergence test pattern showing the RGB crosses. In this case, the green signal can be seen out of line with the other two colours.

settings timing

Retard colour timing

6 When the selected colour crosses are correctly positioned, press to exit that colour channel. The keyboard indicators will return to flashing in sequence.

7If required, repeat steps 4 to 6 to select and adjust any colour channel until the vertical lines of the red, green and blue crosses are all aligned.

8 When all colours are correctly aligned, press	to exit configuration mode
and permanently save all settings.

   

Note: Once you have made a skew adjustment, it may be necessary to re-	18
adjust the image controls to attain an optimum screen image.