Quickmedia Network Wiring - Crestron TPS-12 Operation Manual

Wall Mount Touchpanels
QM Network Topology
16 ¥ Wall Mount Touchpanels: TPS-12G/15G-QM-L

QuickMedia Network Wiring

For the QuickMedia (QM) transport, use CresCAT-QM cable. The Crestron
QuickMedia cable "CresCAT-QM" contains one CAT5E cable and one Cresnet
cable in Siamese jackets.
CRESCAT-QM Cable
NOTE: Do not untwist the two wires in a single pair for more than 1/3-1/2"
(0.84 – 1.27 cm) 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 transmitter and
terminating at the TPS-12G/15G-L must not exceed 328 feet (100 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 particular to either Crestron and/or QuickMedia systems. To ensure
sufficient bandwidth, the maximum aggregate cable length should not exceed 328
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: In the case of the QM 2 input port, the maximum cable length will vary. See
the QM Input # 2 Maximum Cable Length table on page 12.
When connecting multiple QM devices, the route between a QM origination point
(transmitter) and a QM endpoint (receiver) cannot have more than two midpoints
(e.g., QM-MD7x2 or other QM switchers). Refer to the following diagram when
configuring a QM network.
The TPS-12G/15G-L is not a switcher, but a transmitter/endpoint. Therefore, even
when designated as the endpoint from two midpoint switchers, the QM output of the
TPS-12G/15G-L can become another transmitter sending RGB video at the
touchpanel's native resolution and aspect ratio. Refer to the following diagram.
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Crestron Isys TPS-12G/15G-QM-L
Operations Guide – DOC. 6356