TP Receivers • Installation and Operation
Installation and Operation, cont’d
2-18
Cable testing
The TP units are designed for and perform best with Extron
Enhanced Skew-Free A/V cable terminated in accordance
with the TIA/EIA T 568 A wiring standard. CAT 5, Cat 5e and
Cat 6 cables are acceptable but less preferable. Extron also
recommends the use of pre-terminated and tested cables. Cables
terminated on site should be tested before use to ensure they
comply with Category 5/5e/6 specifications.
Equalizing pair skew
CAT 5/5e/6 TP 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 either the red, green,
or blue video image leads (appears to the left of) the other two
video images.
N
Unless the cable is replaced, the skew adjustment is only
done once during installation.
Try using the following methods to minimize or eliminate pair
skew:
•
Switch to Enhanced Skew-Free A/V UTP cable.
•
Add a skew compensation cable to the receiver
output equal to the length of pair skew.
•
Install an SEQ 100 15HD Skew Equalizer on the
video output of the receiver and adjust the skew for
the leading video image.
