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Crestron QM-MD4x2
QuickMedia Distribution Center
Operations Guide
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This document was prepared and written by the Technical Documentation department at: Crestron Electronics, Inc. 15 Volvo Drive Rockleigh, NJ 07647 1-888-CRESTRON All brand names, product names and trademarks are the property of their respective owners. ©2004 Crestron Electronics, Inc.
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Crestron QM-MD4x2 QuickMedia Distribution System Contents QuickMedia Distribution System: QM-MD4x2 1 Introduction ...............................................................................................................................1 Features and Functions................................................................................................1 Applications.................................................................................................................2 Spe
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Crestron QM-MD4x2 QuickMedia Distribution System QuickMedia Distribution System: QM-MD4x2 Introduction Features and Functions ® The Crestron QuickMedia Distribution System, QM-MD4x2 (hereinafter referred to as MD4x2) is part of the Crestron MediaManager™ line of network devices, room control systems, and signal routing solutions. Functional Summary • Four input by two output matrix switching of composite video, S-video, RGB, and audio signals • Switching scheme allows one QuickMedi
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QuickMedia Distribution System Crestron QM-MD4x2 Applications The MD4x2 is part of the Crestron MediaManager line of integrated presentation solutions. It is ideally suited to work with Crestron’s MediaManager wall plate media centers, FlipTop media centers, receivers and control processors to allow quick switching of multiple A/V sources in a presentation system. MediaManager devices are designed for conference room, auditorium, and lecture hall applications, or anywhere else audio, vid
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Crestron QM-MD4x2 QuickMedia Distribution System Functional Diagram of the QM-MD4x2 R R OUT 1 IN 1 G G QM QM Line B B Front End H Out 1 H V 1 V VID 1 DA DA1 VIDEO VID 2 4 X 2 X 5 VID 3 MUX R IN 2 VID 4 G R QM OUT 2 B 5-Layer Crosspoint G Front End H QM Line B 2 V H Out 2 DA2 V DA Cresnet Control R IN 3 G QM B Front End H 3 V DA1 DA3 DIGITAL DA2 AUDIO 4 X 2 X 1 DA3 R IN 4 MUX DA4 G QM B 1-Layer Crosspoint Front End H 4 V DA4 An MD4x2 can be cascaded with a second MD4x2 or other QM-MD switchi
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QuickMedia Distribution System Crestron QM-MD4x2 Specifications Specifications for the QM-MD4x2 are listed in the following table. QM-MD4x2 Specifications SPECIFICATION DETAILS Power Requirements 11 Watts (0.46 Amp @ 24 VDC) Default Net ID 07 Control System Update Files 1, 2 2-Series Control System Version C2-V3.093.CUZ or later Input Channels 4 QuickMedia channels over RJ-45 Output Channels 2 QuickMedia channels over RJ-45 QuickMedia Performance Gain 0 dB Nominal inp
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Crestron QM-MD4x2 QuickMedia Distribution System QM-MD4x2 Physical View (Front) QM-MD4x2 Physical View (Rear) QM-MD4x2 Physical Views 1.70 in (4.32 cm) 17.03 in (43.24 cm) 6.44 in (16.35 cm) 6.64 in (16.86 cm) 16.92 in (42.98 cm) 24 Y Z G 24 YZ2 G 4 YZG 24 Y Z G 24 G 24 G 24 Y Z G 24YZ G QM QM IN OUT 1 2 3 4 1 2 Ports All connections to the MD4x2 are made through the ports on the rear panel. Refer to the illustrations and descriptions that follow. NOTE: Interface connectors for th
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QuickMedia Distribution System Crestron QM-MD4x2 QM IN The MD4x2 contains four QM ports for connecting QM sources. Each QM port has an RJ-45 connector for QM signals and a corresponding 4-position mini-terminal block connector for Cresnet control signals. 24Y Z G For wiring information, refer to “QuickMedia Wiring” on page 10 and “Network Wiring” on page 9. The 4-position mini-terminal block connector on each QM IN port receives 24 VDC power from a 2-position terminal block connector fo
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Crestron QM-MD4x2 QuickMedia Distribution System QM POWER The MD4x2 contains two 2-position terminal block connectors that provide 24VDC power to the Cresnet ports on each of the QM ports. Power to the QM power ports 24 G can be supplied by the Crestron C2N-SPWS300 External 300 Watt Power Supply or the Crestron CN-PWS75 External 75 Watt Power Supply. For more information, refer to “Hardware Hookup” on page 16. NET This 4-position terminal block connector is used to connect the MD4x2 to
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QuickMedia Distribution System Crestron QM-MD4x2 While in the system mode, pressing V will indicate where the video portion of a signal is routed. For more information on the MD4x2’s operating modes, refer to “Operating Modes” on page 28. SYS (System) Press this button to set the MD4x2 to the system mode. When the accompanying LED is illuminated, all switching functions are controlled by the Crestron control system. While in the system mode, routing paths for each input can be viewed on
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Crestron QM-MD4x2 QuickMedia Distribution System Industry Compliance As of the date of manufacture, the MD4x2 has been tested and found to comply with specifications for CE marking and standards per EMC and Radiocommunications Compliance Labelling (N11785). NOTE: This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received
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QuickMedia Distribution System Crestron QM-MD4x2 each network unit to be daisy-chained must be added together to determine the power factor of the entire chain. The length of the run in feet and the power factor of the run should be used in the following resistance equation to calculate the value on the right side of the equation. Resistance Equation Where: R = Resistance (refer to table below). 40,000 L = Length of run (or chain) in feet. R < L x PF PF = Power factor of entire run
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Crestron QM-MD4x2 QuickMedia Distribution System 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 QM transport mechanism (receiver) uses frequency compensation on each twisted pair video input to maintain high resolutions (1600 x 1200) with CRESCAT- QM cable (which contains both Cresnet and CAT5E wiring) and most good quality
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QuickMedia Distribution System Crestron QM-MD4x2 The pin assignments for Crescat-QM, CAT5, CAT5E, and CAT 6 wiring are based on the EIA/TIA 568B RJ-45 Jack standard. RJ-45 QuickMedia Connector Pin 1 To determine which pin is number 1, hold the cable so that the end of the eight-pin modular jack is facing you, with the clip down and the copper side up. When looking down at the copper connections, pin 1 is on the far right. The following table lists the pin assignments on the RJ-45 conne
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Crestron QM-MD4x2 QuickMedia Distribution System control system to recognize a network device via its serial number, which is stored in the device’s memory. This method does not require that any devices be disconnected from the network; Net IDs may be set with the entire Cresnet system intact. This method requires the use of the Crestron Viewport version 3.35 or later. Use the appropriate method to set the Net ID. Method A (Cresnet address-settable ID) 1. Ensure that the device requiring
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QuickMedia Distribution System Crestron QM-MD4x2 “Set Net ID by TSID” Window 5. Enter either the serial number or TSID number of the device that requires a change. The list scrolls to and highlights the device listing. The listing should show the device’s default Cresnet ID (a.k.a. Net ID). 6. Enter the Cresnet ID that the device should be set to and click OK. The number you enter should appear on the list. CAUTION: This function does not prevent you from setting duplicate IDs. Be sure
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Crestron QM-MD4x2 QuickMedia Distribution System 3. Enter the serial number or TSID number as instructed; press the appropriate button to obtain the corresponding number. NOTE: Enter serial numbers, including spaces, exactly as they appear on the unit label. Alpha characters in serial numbers or TSID numbers may be entered in upper or lower case. Rack Mounting WARNING: To prevent bodily injury when mounting or servicing this unit in a rack, take special precautions to ensure that the s
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QuickMedia Distribution System Crestron QM-MD4x2 4. Repeat procedure (steps 1 through 3) to attach the remaining ear to the opposite side. Stacking Four "feet" are provided with the MD4x2 so that if the unit is not rack mounted, the rubber feet can provide stability when the unit is placed on a flat surface or stacked. These feet should be attached prior to the hookup procedure. Refer to the illustration below for placement of the feet. Feet Location (Bottom View of Unit) ATTACH FEET
