Lindy CPU IP Access Switch Plus User Manual page 30

Video settings
This dialog provides access to all of the key video settings that determine image
quality and link performance.
Phase
The phase setting
adjusts the alignment
of the host video
output and the remote
system video display to
achieve the sharpest
image.
Horizontal position
Determines the
horizontal position of
the host screen image
within the viewer
window.
Vertical position Colour, brightness &
Determines the contrast
vertical position Provides an automatic
of the host screen setting button to
image within the
optimise these three
viewer window. important video
constituents for the
current host and
connection speed.
All settings can be individually subjected to an auto configuration (click the
appropriate 'Auto' button) and most can also be manually adjusted.
Use the 'Calibrate all' button to automatically determine the optimum settings
for all items.
Note: Before using the Calibrate all option, ensure that there are no on-screen
display elements generated by any connected KVM switch (such as a host name
label or menu). Due to the differing video rates of these items compared to
the video image from the host itself this can confuse the calibration process
into giving a much higher Threshold rate than is necessary, thus worsening the
screen artefacts.
Threshold
The threshold
is effectively a
noise filter that
differentiates
between valid
video signals and
background noise
or inteference.
This has the
effect of reducing
unnecessary video
signals between
the CPU IP and the
remote system,
thus improving
performance.
Calibrate all Display activity
Click to Indicates the level
determine the of video activity
optimum settings currently in
for all aspects of progress.
video the video
connection from
the host system.
Setting the Threshold manually
Occasionally it can be useful to manually adjust the Threshold setting, such as
when there is a KVM switch OSD banner that cannot be easily removed from the
display.
1 Use the 'Calibrate all' function to ensure that all other settings are
optimised.
2 Click the Threshold left arrow button to decrement the setting by one and
observe the Display activity indicator.
3 Repeat step 2 until the Display activity indicator suddenly rises to a much
higher level (i.e. 50%). This will mean that you have reached the noise
boundary. At this point, increment the Threshold value by 2 or 3 points to
achieve an optimum setting.
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