Installation guide

Applications Guide Crestron MediaManager™
Routing CAT5E/UTP cable is less expensive and much simpler than routing
multi-colored, multi-conductor coax cable. All Crestron
®
products using the
QuickMedia Transport System are capable of sending and receiving
QuickMedia signals via standard CAT5E/UTP cable. Crestron recommends
Belden Media-Twist cable, and Crescat-QM. Installation of any QuickMedia
device is as simple as installing one set of QuickMedia wires from output to
input. Installations are flexible, affordable, and fast.
The Crescat-QM cable contains one CAT5E cable and one Cresnet
®
cable in a
siamese jacket.
QuickMedia Cable – CRESCAT-QM
The QuickMedia receiver performs frequency compensation on each video input
for skew. Signal skew occurs when part of the signal is delayed with respect to
other signal components. The amount of skew largely depends on the length of
the QuickMedia cable. Unequal wire lengths are created because CAT5 consists
of twisted pairs that are twisted together in the cable.
The total accumulated skew from QM transmitter to QM receiver must not
exceed 15 ns (nanoseconds). Crestron recommends a cable with a rating of less
than or equal to 15 ns over its entire length.
For example, if using a cable with a rating of 15 ns/100 meters (100 meters =
328 feet), connecting the QM-WMC/QM-WMIC QM transmitter with 150 feet
of cable to a QM-MD7x2 switcher, and then using another 150 feet to connect
• Crestron MediaManager™ Applications Guide – DOC. 6244
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