Crestron QM-MD8x8 Spezifikationen PDF herunterladen (Seite 17)

Crestron QM-MD8X8 8X8 QuickMedia

Matrix Switcher

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-MD8X8 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

or more than 22 ns.

QM Network Topology

TPS-12G/15G-QM-L

QM-TX

Origination Points Endpoints

Midpoints

QM-FTDC

QM-MD8X8QM-MD8X8

QM-WMC

TPS-12G/15G-QM-L

Identity Code

The Net ID of the QM-MD8X8 has been factory set to 32. The Net IDs of multiple

QM-MD8X8 devices in the same system must be unique. Net IDs are changed from

a personal computer (PC) via the Crestron Toolbox™ (refer to “Establishing

Communication” on page 20).

When setting the Net ID, consider the following:

• The Net ID of each unit must match an ID code specified in the SIMPL™

Windows

program.

• Each network device must have a unique Net ID.

For more details, refer to the Crestron Toolbox help file.

Operations Guide – DOC. 6572A 8X8 QuickMedia

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