Crestron CNSNET Spécifications télécharger pdf (Page 19)

Crestron TPMC-12 Isys i/O

Tilt Touchpanel Media Center

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 transmitter and

terminating at a TPMC-12 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, 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.

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.

NOTE: The aggregate length from transmitter to receiver cannot have a delay skew

of more than 22 ns.

Operations Guide – DOC. 6675A Isys i/O

Tilt Touchpanel Media Center: TPMC-12 • 15

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Crestron CNSNET Spécifications Page 19