Adder Technology EPS-M8, X200AS/R Video compensation, See Remote user skew adjustment for details

Video compensation

The AdderView CATx units allow computer systems to be placed up to 50m

(160 feet) away and remote users to be extended by a maximum of 300m (980 feet). Such long cable lengths can affect video signals, especially when higher screen resolutions are used. In order to eliminate any video signal degradation, all AdderView CATx units and accompanying Adder X100 and X200 extenders provide effective software-based video compensation features.

Two main types of video compensation are provided within the AdderView CATx installation, these are:

•Computer video compensation - operates on video signals between each computer system and the AdderView CATx unit. See Computer video compensation.

•Remote user video compensation - operates on video signals between each remote user(s) and the AdderView CATx unit. See Remote user video compensation for details.

Note: For installations where both computers and remote users require video compensation, always ensure that the computers are compensated first.

•A third type of video compensation is provided by Adder X100AS/R and Adder X200AS/R extender modules only. This type of compensation is called Skew adjustment and combats the effect of uneven twisted pairs within link cables. .

See Remote user skew adjustment for details.

It is important to note that, providing the cabling arrangements do not change, the various video compensations need to be applied only once to each computer or remote user link. During operation, control of video compensation is fully automatic. Please take into account the following when configuring links:

•The AdderView CATx stores a video compensation setting for each computer which defines the level of compensation that is applied whenever the computer is selected. This “computer video compensation” setting

is to correct for any video clarity loss due to the CATx cable between the AdderView CATx unit and the computer’s CAM.

•CATx cables below 10m give very little loss and so it is not normally necessary to be concerned about setting any computer video compensation if short CATx cables are being used between the AdderView CATx and the CAM for each computer.

•“Computer video compensation” may be setup by typing in the cable distance in the OSD or, if very fine video adjustment is desired, by observing the video picture on the local (user 1) port whilst making adjustments.

•If a cascade of switches is being used, computer video compensation only needs to be applied at the master AdderView CATx.

•“Remote user video compensation” compensates for any CATx cable losses introduced by the cable between the X100/X200 and the AdderView CATx. The required video compensation setting does not vary as any “computer video compensation” is automatically added as different computers are selected. This only needs to be setup once during installation.

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