Setting Up The Skew Compensator Manually - Lindy 39390 User Manual

English Manual

6.5 Setting up the skew compensator manually

If the skew compensator is to be used with a KVM extender that does not have a skew setting reporting feature
then you will need to setup the skew compensator manually. To do this you will first need to determine which of the
switch banks controls which of the colours (on all C5 Series products, switch bank A is BLUE, B is RED and C is
GREEN).
To determine which switch bank controls the delay of which colour you must first install the skew compensator as
shown in figure 11. Set all the switches to the OFF position. Now set all the switches in one bank (e.g. A1 to A4) to
the ON position and observe the change to the video picture. The delayed colour should appear as a shadow on
the right hand side of white objects that are on a dark background. This shadow may best be observed of you have
a picture with white objects set against a black background. For example, if you create a picture similar to that
shown below in a drawing package such as Paint then the delayed colour will be seen on the right hand side of the
white square.
Once you have determined which set of switches controls which colour you can switch all the switches OFF and
observe the picture. Remember that the picture is made up from red, green and blue colour signals. Use a test
pattern similar to that shown above and observe the component colour that is most delayed (i.e. the one that
appears as a shadow after a white image on a black background). Leave all the switches associated with this
colour in the OFF position and start to add delays to the OTHER colours by setting some of their associated
switches to the ON position. Observe the changes to the picture after you change the switches. Switches 1 and 2
each introduce a 10 nanosecond delay. Switch 3 introduces a 5 nanosecond delay and switch 4 introduces a 2.5
nanosecond delay.
A process of trial and error is required to find the best switch settings.
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