Extron electronics MTPX Plus Series, User Manual

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MTPX Plus Twisted Pair Matrix Switchers • HTML Operation
Changing the skew
Users can individually set the red, green, and blue skew setting for each input
and/or output from the Picture Settings page. The skew settings
correct
skew delay (misconvergence) problems commonly encountered when using
Category (CAT) 5, 5e, or 6 twisted pair (TP) cables for RGB or component video
transmission .
Change an input’s or output’s skew setting as follows:
N
For best results, set all three skew values to 0 ns (see steps 2a and 2b below)
before adjusting for misconvergence.
1 . Use UTP cable test equipment or examine the displayed video image with
a critical eye to determine which video signal, red, green, or blue, is most
shifted to the left.
N
A crosshatch test pattern is ideal for evaluating pair skew.
2 . Monitor the displayed image. Increase the left-shifted video signal’s skew
setting 2 ns at a time as follows:
N The skew compensation function cannot shift a video plane farther left than the 0 ns
setting.
a
. Click drop box for the desired input or output and the desired video
plane. A drop-down scroll box appears (figure 6-12).
N The red video plane is selected in figure 6-12.
Figure 6-12 — Skew selection drop box
b . Click and drag the slider or click on the scroll up button or the scroll
down button until the desired value is visible.
N A 2-nanosecond adjustment is very fine. Up to 10 nanoseconds of delay may be
necessary before you detect a change in the display.
N As an alternative to step 2 , or to watch a display as you make adjustments, click
on the up button or down button.
3 . If either of the other video signals is misconverged, repeat steps 2a and 2b .