Black Box ServSwitch CX 用户手册

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The ServSwitch CX units allow server 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 ServSwitch CX units and accompanying ServSwitch CX Remote extenders 
provide effective software-based video compensation features. 
Two main types of video compensation are provided within the ServSwitch CX 
installation, these are:

• 

Server video compensation - operates on video signals between each 
server system and the ServSwitch CX unit. See 

for details.

• 

Remote user video compensation - operates on video signals between 
each remote user(s) and the ServSwitch CX unit. See 

 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 server 
or remote user link. During operation, control of video compensation is fully 
automatic. Please take into account the following when configuring links:

•  The ServSwitch CX stores a video compensation setting for each server 

which defines the level of compensation that is applied whenever the server 
is selected. This “server video compensation” setting is to correct for any 
video clarity loss due to the CATx cable between the ServSwitch CX unit and 
the server’s SAM. 

•  CATx cables below 10m (30 feet) give very little loss and so it is not normally 

necessary to be concerned about setting any server video compensation if 
short CATx cables are being used between the ServSwitch CX and the SAM 
for each server. 

•  “Server 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, server video compensation only needs 

to be applied at the master ServSwitch CX. 

•  “Remote user video compensation” compensates for and CATx cable 

loss introduced by the cable between the ServSwitch CX remote and the 
ServSwitch CX. The required video compensation setting does not vary as 
any “server video compensation” is automatically added as different servers 
are selected. This only needs to be setup once during installation. 

Overall maximum length between any remote user and

any server system must not exceed 300 metres (980 feet)

300 metres (980 feet)

maximum

50 metres
(160 feet)
maximum

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•  A third type of video compensation is provided by Black Box ServSwitch 

CX remote AS/R extender modules only. This type of compensation is called 
Skew adjustment and combats the effect of uneven twisted pairs within link 
cables.  
See 

 for details.