Skew Delay Compensation; Seq Receiver Skew Compensation - Extron electronics MTP 1500RL 15HD RS Series User Manual

Skew delay compensation

CAT cable can lead to registration errors between the red, green,
and blue video signals. Pair skew can be measured with test
equipment or identified by viewing a crosshatch test pattern
with a critical eye to determine if the red, green, or blue video
image leads (appears to the left of) the other two video images.
N

SEQ receiver skew compensation

The SEQ receivers have built-in skew compensation capabilities.
Adjust the equalization as follows:
1. Zero the skew delay for red, green, and blue as follows:
a. Use a Tweeker or other small screwdriver to press and
b. Release the Select button.
2. 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 shifted furthest to the right.
N
3. Adjust the furthest left video signal as follows:
N
a. Use a Tweeker or other small screwdriver to press
b. Slowly rotate the Adjust control clockwise while
N
c. Use a Tweeker or other small screwdriver to press the
4. If the remaining color is left shifted, repeat step 3.
Unless the TP cable is changed, the skew adjustment
should only need to be made once, during installation.
hold the Select button for 3 seconds. The Red, Green,
and Blue LEDs all go out.
A crosshatch test pattern or a black background with
vertical white lines is ideal for determining skew.
The SEQ receiver cannot shift the furthest right video
image to the left.
and release the Select button until the LED for the left-
shifted color (red, green, or blue) lights.
monitoring the display. Continue to rotate the control
until that color is properly converged.
A 2-nanosecond (ns) adjustment is very fine. Up to 10 ns
of delay may be necessary before a change in the display is
detectable. Maximum delay possible is 62 nanoseconds.
Select button one more time to save the most recent
adjustment or allow the 10-second timeout to elapse.
MTP 1500RL 15HD RS Series • Installation
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