Crestron QM-TX Spécifications télécharger pdf (Page 14)

QuickMedia™ Transmitter Crestron QM-TX

NOTE: When daisy-chaining Cresnet units, strip the ends of the wires carefully

to avoid nicking the conductors. Twist together the ends of the wires that share a

pin on the network connector, and tin the twisted connection. Apply solder only

to the ends of the twisted wires. Avoid tinning too far up the wires or the end

becomes brittle. Insert the tinned connection into the Cresnet connector and

tighten the retaining screw. Repeat the procedure for the other three conductors.

NOTE: For additional information on video connections over CAT5, refer to

the latest version of the Crestron CAT5 Wiring Reference Guide (Doc. 6137)

which is available from Crestron website (http://www.crestron.com/manuals).

NOTE: For larger networks (i.e., greater than 28 network devices), it may be

necessary to add a Cresnet Hub/Repeater (CNXHUB) to maintain signal quality

throughout the network. Also, for networks with lengthy cable runs or varying

types of network devices, it may be desirable to add a hub/repeater after only 20

network devices.

QM Network Wiring

For the QuickMedia transport, use CRESCAT-QM cable.

The aggregate cable length from transmitter to receiver cannot have a delay

skew of more than 22 ns for a given signal path originating at a QM transmitter

and terminating at a QM receiver. The aggregate cable length must not exceed

328 feet.

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.

QM Network Topology

Installer’s Toolbox

The Installer's Toolbox (a replacement for Crestron Viewport, you may continue

to use Viewport if desired) is a broad-based software package that accomplishes

multiple system tasks, primarily using an RS-232 or TCP/IP connection between

a PC and one or more Crestron control systems.

You can use the Installer's Toolbox to:

• Observe system processes.

• Upload operating systems and firmware.

10 • QuickMedia™ Transmitter: QM-TX Operations Guide - DOC. 6334

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Crestron QM-TX Spécifications Page 14