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To apply remote user video compensation
1 On the remote user keyboard (connected to a User Station extender),
simultaneously, press the hotkeys (by default,
enter configuration mode.
The three keyboard indicators ('Num Lock', 'Caps
Lock' and 'Scroll Lock') will now begin to flash in
sequence. The speed of the sequence indicates
the level of the sharpness adjustment currently
applied: the slower the rate, the lower the level of
sharpness being applied.
2 While viewing the displayed screen image, use the following keys to adjust
the controls:
Sharpness:
for fine adjustment,
There are 255 sharpness levels (one coarse step jumps 10 levels).
To autoset sharpness (C5 Pro only and C5 USB-300): Press
to make the module calculate and apply an automatic
compensation level - you can use this as a starting point for your
fine tuning.
Note: If the monitor goes blank and switches off (due to oversetting
the sharpness adjustment) press the Home key to restore.
Brightness:
for adjustment. There are 255 brightness levels.
Restore default
sharpness and
brightness
settings
Exit image
controls
and save
settings
3 When no shadows are visible and the displayed images have crisp edges,
press
to exit configuration mode and permanently save all settings.
The new compensation settings will be stored, even when power is removed
or if a complete reset is initiated. These settings should not require further
changes unless the cabling arrangements are altered.
and
) along with
to
for coarse adjustment.
Sharpness
increase
(coarse)
Sharpness
decrease
(coarse)
Sharpness
increase
(fine)
Brightness
increase
Sharpness
decrease
Brightness
(fine)
decrease
Remote user skew adjustment
The category 5, 5e and 6 cabling supported by the SC5 consists of four pairs of
wires per cable. Three of these pairs are used 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
precisely the same time. This is visible as
separate colour shadows on high contrast
screen images and is particularly apparent
when using higher screen resolutions and
some types of category 5e cables.
To alleviate this situation, the User Station
C5 Pro and C5 USB-300 modules provide
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, the "skew" program supplied on the disk is the most accurate
way of setting skew as the red, green and blue lines are rendered exactly on the
screen as single pixel wide lines. The skew.bmp test pattern can also be used but
it is less accurate. Alternatively, you can create your own skew pattern using a
standard image creation package.
1 2 3 4 5 6 7 8
8
8
Data signal
7
7
6
6
Red
3
3
video signal
5
5
Green
4
4
video signal
2
2
Blue
1
1
video signal
continued
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