User guide
27
Video compensation
The MC5 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 MC5 units and
accompanying User Station modules provide effective software-based video
compensation features.
Two main types of video compensation are provided within the MC5 installation,
these are:
• Computer video compensation - operates on video signals between each
computer system and the MC5 unit. See Computer video compensation.
• Remote user video compensation - operates on video signals between
each remote user(s) and the MC5 unit. See Remote user video
compensation 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 conguring links:
• The MC5 stores a video compensation setting for each computer which
denes 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 MC5 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 MC5 and the CAM for
each computer.
• “Computer video compensation” may be setup by typing in the cable
distance in the OSD or, if very ne 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 MC5.
• “Remote user video compensation” compensates for any CATx cable
losses introduced by the cable between the User Station and the MC5. 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.
REMOTE
USER
Overall maximum length between any remote user and
any host system must not exceed 300 metres (980 feet)
300 metres (980 feet)
maximum
50 metres
(160 feet)
maximum
Computer
video
compensation
Remote user
video
compensation
U S
CAM
COMPUTER
SYSTEM
Note: For installations where both computers and remote users require video
compensation, always ensure that the computers are compensated rst.
• A third type of video compensation is provided by User Station C5 Pro
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.