User guide

Chapter 3: Working with Target Servers
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Devices can filter out the electrical interference of video output
from graphics cards. This feature optimizes picture quality and
reduces bandwidth. Higher settings transmit variant pixels only if
a large color variation exists in comparison to the neighboring
pixels. However, setting the threshold too high can result in the
unintentional filtering of desired page changes. Lower settings
transmit most pixel changes. Setting this threshold too low can
result in higher bandwidth use.
Note: The default Noise Filter is 4. Raritan recommends that you
lower this value to 0 (zero). Although higher settings will stop the
needless transmission of false color variations, true and intentional
small changes to a video image may not be transmitted.
b. PLL Settings
If the video image looks extremely blurry or unfocused, the PLL
settings for clock and phase can be adjusted until a better image
appears on the active target server.
Warning: Exercise caution when changing the clock and phase
settings since doing so may result in lost or distorted video and you
may not be able to return to the previous state. Contact Raritan
Technical Support before making any changes.
 Clock - Controls how quickly video pixels are displayed across
the video page. Changes made to clock settings cause the video
image to stretch or shrink horizontally. Odd number settings are
recommended. Under most circumstances this setting should not
be changed because the autodetect is usually quite accurate.
 Phase - Phase values range from 0 to 31 and will wrap around.
Stop at the phase value that produces the best video image for
the active target server.
a. Color Settings
These settings control the brightness, contrast, and positioning of
the target server display. Select the Link Color Controls checkbox
to make all slide adjusters move in unison when any one option
is moved.
 Brightness Red - Controls the brightness of the red signal; range
is 0 - 127.
 Brightness Green - Controls the brightness of the green signal;
range is 0 - 127.
 Brightness Blue - Controls the brightness of the blue signal;
range is 0 - 127.
 Contrast Red - Controls the red signal contrast; range is 0 - 255.
 Contrast Green - Controls the green signal contrast; range is 0 -
255.