Installation guide

Media & Computer Centers Crestron QM-WMC/WMC-VCC/WCC-2
CresCAT-QM Cable
CresCAT-QM
Cable
NOTE: Do not untwist the two wires in a single pair for more than 1/3-
1/2” (8 - 13 mm) when making a connection. The twists are critical to
canceling out interference between the wires.
The aggregate cable length of a signal path originating at a
QM-WMC/WMC-VCC/WCC-2 and terminating at a QM receiver must
not exceed 450 feet (137 meters). Video signals may experience a loss of
quality over very long lengths of cable. This phenomenon is due to the
added resistance and capacitance of longer cable lengths and is not
peculiar to either Crestron and/or QuickMedia systems. To ensure
sufficient bandwidth, the maximum aggregate cable length should not
exceed 450 feet. The use of lower resolution signals may allow increased
cable length but must be tested by the installer with the sources to be
used. The QM pin assignment is based on the EIA/TIA 568B RJ-45 Jack
standard.
NOTE: When transmitting S-video or composite video, luminance uses
the green video pathway and chrominance uses the red video pathway.
When transmitting composite video, the signal is carried on the blue
video pathway.
NOTE: When using CresCAT-QM wiring, four additional wires are
included for making Cresnet connections
.
22 • Wall Plate Media & Computer Centers Operations & Installation Guide – DOC. 6237C