ADDER AdderLink X-DVI Manual - Página 11

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Operation

Operation

General use

In use, the X-DVI modules should be transparent - the system and its peripherals
should operate exactly as normal, the only difference being that they are now up
to 50 metres apart.
In some installations, you may see some small flickering of pixels on the screen,
particularly at higher screen resolutions. This is due to some portions of the
video data being misinterpreted by the video monitor. Assuming that the video
monitor is working correctly, this condition is generally caused by a combination
of the screen resolution and the length/quality of the link cable. In certain cases,
the data misinterpretation can lead to a complete loss of the video image.
If any of the above conditions occur, your first step should be to use the in-built
X-DVI video compensation feature to alleviate the situation. See
compensation
for details.

Video display (EDID) information

Extended Display Identification Data (or EDID) is an industry standard scheme
which allows video monitors to declare their capabilities to the computer's
video adapter circuitry, allowing the latter to optimise their outputs accordingly.
Since the widespread adoption of the scheme, video adapters have become
increasingly dependent on receiving relevant EDID information during startup,
before they will output anything more than a rudimentary video signal.
Each time that the remote module is powered on, it attempts to read the EDID
information from the connected DVI video monitor. If the attempt is sucessful,
the information is transferred to the local module and stored within non-voltile
memory. This is information is then made available to the computer's video
adapter when required.

Power and activity indicators

Each module provides two indicators to confirm power status and also feedback
about the various input signals:
Local module
Video image
Remote module
Green:
• On when power is present.
Yellow:
• On when a valid DVI video input signal is being received
from the computer.
Flashes regularly (twice per second) when no valid DVI
video signal is being received from the computer.
• Off when the CATx link cable is disconnected.
• Blinks in response to inputs from the remote keyboard/
mouse.
Green:
• On when power is present.
Yellow:
• On when a valid DVI video input signal is being received
from the local module.
Flashes regularly (twice per second) when no valid DVI
video signal is being received from the local module.
• Blinks in response to inputs from the keyboard/mouse.
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