ADDER AdderLink X2 Manual de usuario descargar pdf (Pagina 2)

Increased video performance

A significant improvement of the AdderLink X2-GOLD is the increased distance over

which video can be transmitted and the very high resolutions that can be achieved at

these distances. Industry leading resolutions of 1600 x 1200 are achievable at

200m/650ft and 1280x1024 at 300m/1000ft. For these distances and resolution to be

achieved several engineering challenges were overcome;

Video compensation

When transmitting video signals over extended distances there is an inevitable

degradation of the signal and it is necessary for any KVM over CATx extender

to compensate for this. How this is implemented greatly affects the quality of

the image and the AdderLink X2-GOLD applies a high level of signal

compensation that allows for a greatly increased range of very smooth and fine

adjustments.

Brightness control

Another consequence of extending video over long distances of CATx cable is

a dimming of the image. Sometimes this can be corrected by brightness

controls of the monitor but the range of correction offered by the monitor

may not be sufficient. The AdderLink X2-GOLD offers its own brightness

correction to ensure that the image is crisp, clear and bright, regardless of the

distance.

Integrated DeSkew

Video signals are transmitted as separate Red, Green and Blue (RGB) signals

and KVM over CATx extenders use one of the 4 pairs in a CATx cable for each

colour. Because of the way in which CATx cables are constructed, specifically

Cat5e and Cat6, each pair length can differ from another meaning that one

colour can take longer to arrive than another resulting in colour splitting

effects (skew). The user sees this as colour shadows on high contrast screen

images. The skew adjustment works by delaying or advancing particular colour

signals so that they are delivered to the monitor at precisely the same time.

The AdderLink X2-GOLD has integrated skew correction with a 300MHz

bandwidth, meaning that it is more than powerful enough to negate the

negative effects of the skew.

Audio

Extending audio using KVM extenders can be difficult, particularly when audio of a high

quality is required. Analogue transmission methods produce far from satisfactory

results but digital transmission has its own potential pitfalls with unwanted clicks being

a common occurrence. The AdderLink X2-GOLD units ensure that the transmitter and

receiver clocks are synchronised to ensure that no audio is ever lost or added, thus

preventing annoying audio clicks.

Emulated DDC

Display Data Channel support is an area that is often ignored on extenders and KVM

switches in general. Display Data Channel is a communication standard that allows a

computer monitor to inform a video card of its capabilities. The video card can then

configure itself to present an image to the monitor in the most efficient way. Unless a

device actively supports DDC this communication cannot take place. Sometimes this is

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ADDER AdderLink X2 Manual de usuario Pagina 2

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