Installation guide

QuickMedia
®
Computer Centers Crestron QM-FBCC/WCC-1
14  QuickMedia
®
: QM-FBCC/WCC-1 Operations & Installation Guide – DOC. 6716B
CresCAT-QM Cable
CresCAT-QM
Cable
NOTE: Do not untwist the two wires in a single pair for more than 1/3-
1/2” (8–12 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-FBCC/WCC-1 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 using CresCAT-QM wiring, four additional wires are
included for making Cresnet connections.
When connecting multiple QM devices, the route between a QM
origination point (transmitter) and a QM endpoint (receiver) cannot have