English Manual
LINDY KVM Extender C5 PRO-300 Installation and Use
page 21
5.8 The Skew Compensation Adjustment
The twisted pair cabling supported by the Extender C5 set
(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 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 the
monitor together. This is visible as separate colour shadows
on high contrast screen images. This effect is particularly
apparent when using higher screen resolutions and some
types of category 6 and STP cables and in such instances, if
possible, we recommend you use CAT5e UTP cable.
However, the Extender C5 provides internal skew adjustment that can help to rectify the situation. The skew
adjustment 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
1
Insert the supplied Installation CD-ROM into the CD
player of the computer.
2
Within 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.
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.
3
Simultaneously, press the hotkeys (by default, <CTRL> and
<SHIFT> along with <RETURN>) to enter configuration mode.
The three keyboard indicators (‘Num Lock’, ‘Caps Lock’ and ‘Scroll
Lock’) will now begin to flash in sequence.
If the image controls cannot provide a crisp image
If, after adjusting the image controls, the screen image remains fuzzy or has
coloured shadows you may need to use the Skew adjustment feature.
Please see the next section for details.