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Crestron QM-MD8X8
8X8 QuickMedia™ Matrix Switcher
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.
©2006 Crestron Electronics, Inc.
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
Contents
8X8 QuickMedia™ Matrix Switcher: QM-MD8X8 1
Introduction ...............................................................................................................................1
Features and Functions................................................................................................ 1
Applications.................................................................................................................2
Internal Block Diagram ............................................................................................... 4
Specifications ..............................................................................................................6
Physical Description.................................................................................................... 6
Industry Compliance ...................................................................................................9
Setup ........................................................................................................................................ 11
Network Wiring......................................................................................................... 11
QuickMedia Wiring................................................................................................... 11
Identity Code ............................................................................................................. 12
Hardware Hookup .....................................................................................................12
Programming Software............................................................................................................15
Earliest Version Software Requirements for the PC .................................................15
Programming with SIMPL Windows........................................................................ 15
Example Program...................................................................................................... 17
Uploading and Upgrading........................................................................................................ 18
Establishing Communication.....................................................................................18
Programs and Firmware ............................................................................................18
Operation .................................................................................................................................19
Operating Modes .......................................................................................................19
System Mode Operation-Viewing Signal Routing..................................................... 19
Local Mode Operation-Switching Signal Routing ....................................................19
Problem Solving ...................................................................................................................... 21
Troubleshooting......................................................................................................... 21
Check Network Wiring..............................................................................................21
Reference Documents................................................................................................22
Further Inquiries........................................................................................................ 22
Future Updates ..........................................................................................................23
Return and Warranty Policies.................................................................................................. 24
Merchandise Returns / Repair Service ......................................................................24
CRESTRON Limited Warranty.................................................................................24
Operations Guide – DOC. 6260A Contents • i
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
8X8 QuickMedia™ Matrix
Switcher: QM-MD8X8
Introduction
Features and Functions
• Eight input by eight output QuickMedia matrix switcher
• QuickMedia technology carries high-resolution RGB, video, stereo
audio and microphone signals up to 328 feet using either Crescat-QM-P
or Crescat-QM-NP QuickMedia cable from Crestron
• Audio breakaway can route audio signals independent of video signals
• Expands number of inputs and outputs of existing QuickMedia systems
• Front panel buttons can be used to operate switcher; buttons can be
custom labeled
• Front panel buttons can be disabled for security
• Control system program can operate the switch via digital, analog, and
serial control
• QuickMedia ports include Cresnet
distribution to simplify termination of QuickMedia and Cresnet wiring
®
ports with 24VDC power
®
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
Applications
The following diagrams show a QM-MD8X8 in a lecture hall application and a
business application.
QM-MD8X8 in a Lecture Hall Application
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
QM-MD8X8 in a Business Application
For more information on this and other QM applications, refer to the latest revision
of the Crestron MediaManager Applications Guide (Doc. 6244) which is available
from the Crestron website (http://www.crestron.com/manuals
Operations Guide – DOC. 6260A 8X8 QuickMedia™ Switcher: QM-MD8X8 • 3
).
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
Internal Block Diagram
The following diagram represents the switching abilities of the QM-MD8X8. The
QM-MD8X8 can be operated locally (local mode) using buttons on the front panel,
or remotely from a control system (system mode). For more information, refer to
“Operating Modes” on page 19.
Internal Block Diagram of the QM-MD8X8
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
Up to two tiers of QM-MD8X8s can be cascaded to provide up to 64 QM inputs
through one QM-MD8X8 as shown in the following block diagram.
Multiple QM-MD8X8s Cascaded to One QM-MD8X8
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
Specifications
Specifications for the QM-MD8X8 are listed in the following table.
QM-MD8X8 Specifications
SPECIFICATION DETAILS
8X8 Video/RGB Matrix
Gain
Crosstalk
8X8 Audio Matrix
Gain
Power Requirements
Cresnet Power Usage
Default NET ID 06
Minimum 2-Series Control
System Update File
Environmental
Temperature
Humidity
Enclosure
Dimensions
Height
Width
Depth
Weight 3.6 lbs (1.6 kg)
Routes any (8) QM inputs to any of (8) QM
outputs
0dB
-60dB
Routes any of (8) QM inputs to any of (8)
QM outputs with selectable audio-followvideo or audio breakaway
0dB
30 Watts (1.25 Amps @ 24 Volts DC)
Version C2-V3.093.CUZ or later
41° to 104°F (5° to 40°C)
10% to 90% RH (non-condensing)
Black metal, 1U 19" rack mountable
(rack ears included)
1.7 in (4.32 cm)
19.0 in (48.26 cm) with ears;
17.03 in (43.24 cm) without ears
6.64 in (16.35 cm)
Physical Description
This section provides information on the connections, controls, and indicators
available on your QM-MD8X8.
QM-MD8X8 Physical View (front)
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
QM-MD8X8 Physical View (rear)
QM-MD8X8 Overall Dimensions
17.03 in
(43.24 cm)
6.44 in
(16.35 cm)
1.70 in
(4.32 cm)
16.92 in
(42.98 cm)
1
2 3 4 5 6 7 8 9 10
11 1112 1311 111415
6.64 in
(16.86 cm)
Connectors, Controls, & Indicators
# CONNECTORS,
DESCRIPTION
CONTROLS, &
INDICATORS
1 PWR LED
(continued on following page)
Operations Guide – DOC. 6260A 8X8 QuickMedia™ Switcher: QM-MD8X8 • 7
Indicates 24 Volts DC power supplied from
Cresnet control network.
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
Connectors, Controls, & Indicators (continued)
# CONNECTORS,
CONTROLS, &
INDICATORS
2 NET LED
3 AUDIO BREAK
4 AUDIO
5
6 SYSTEM
VIDEO
DESCRIPTION
Indicates communication with Cresnet
System.
When in Local mode, enables audio break.
When in System mode, LED indicates audio
break is enabled.
When in Local mode, selects audio routing
when audio break is enabled. When in
System mode, selects audio routing view.
When in Local mode, selects video routing
when audio breakaway is enabled. When in
System mode, selects video routing view.
Activates System mode (routing controlled
via control system program). Deactivates
Local mode.
7 LOCAL
8 ENTER
9 IN 1 through 8
•••
(continued on following page)
Activates Local mode (routing controlled via
front panel). Deactivates System mode.
When operating in Local mode, implements
routing set by IN and OUT buttons.
When in Local mode, selects input to be
routed. When in System mode, selects
routing view for a given input.
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
Connectors, Controls, & Indicators (continued)
# CONNECTORS,
CONTROLS, &
INDICATORS
10 OUT 1 through 8
•••
11 24/G
12 QM IN 1 through 8
13 QM OUT 1 through 8
DESCRIPTION
When in Local mode, selects output
destination(s). When in System mode,
selects routing view for a given output.
Four 2-position 5mm detachable terminal
block connectors (one connector for every
group of four QM ports) receive 24 Volts DC
from external Cresnet power supplies.
Maximum load 75 watts each. Interface
connectors for the 24/G connectors are
provided. For more information, refer to
“Hardware Hookup” on page 12.
Eight RJ-45 QuickMedia input ports with
4-position terminal block Cresnet ports.
Connect via CRESCAT-QM cable to QM
output ports of other QuickMedia devices.*
Interface connectors for the Cresnet
connectors are provided.
Eight RJ-45 QuickMedia output ports with
4-position terminal block Cresnet ports.
Connect via CRESCAT-QM cable to QM
input ports of other QuickMedia devices.*
Interface connectors for the Cresnet
connectors are provided.
14 NET
15
* For QuickMedia wiring use CRESCAT-QM-NP or CRESCAT-QM-NP cable; the maximum
aggregate cable length and delay skew between any QM transmitter (origination point) and QM
receiver (endpoint) is 328 ft (100m) and 22 ns; a maximum of two QM midpoint devices may be
inserted in a given QM signal path. (exceptions apply, refer to each respective product manual for
full detail).
SETUP
(LED and button)
Four-position terminal block connector for
data and power. Connects to Cresnet control
network. An interface connector is provided.
Pin 1 (24) Power
Pin 2 (Y) Data
Pin 3 (Z) Data
Pin 4 (G) Ground
Used to setup unit’s Net ID in conjunction
with Crestron Toolbox.
Industry Compliance
As of the date of manufacture, the QM-MD8X8 has been tested and found to comply
with specifications for CE marking and standards per EMC and
Radiocommunications Compliance Labelling.
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
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, including interference that may
cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
Setup
Network Wiring
When wiring the network, consider the following:
• Use Crestron Certified Wire.
• Use Crestron power supplies for Crestron equipment.
• Provide sufficient power to the system.
CAUTION: Insufficient power can lead to unpredictable results or damage
to the equipment. Please use the Crestron Power Calculator to help calculate
how much power is needed for the system
(http://www.crestron.com/calculators
• For larger networks, use a Cresnet Hub/Repeater (CNXHUB) to maintain
signal quality.
For more details, refer to “Check Network Wiring” on page 21.
).
QuickMedia Wiring
The Crestron QuickMedia cable (sold under the name “Crescat-QM”) contains one
CAT5E cable and one Cresnet cable in siamese jackets. Installation of any QM
device is as simple as installing Crescat-QM wires from the output of one device to
the input of another. Installations are flexible, affordable, and fast. For more
information, refer to the latest revision of the Crestron MediaManager Applications
Guide (Doc. 6244) which is available for download from the Crestron website.
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.
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
Identity Code
The Net ID of the QM-MD8X8 has been factory set to 06. 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. 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.
Hardware Hookup
Ventilation
Rack Mounting
The QM-MD8X8 should be used in a well-ventilated area. The venting holes should
not be obstructed under any circumstances. If the QM-MD8X8 is hot to the touch,
consider using forced air ventilation and/or incrementing the spacing between units.
To prevent overheating, do not operate this product in an area that exceeds the
environmental temperature range listed in the table of specifications. Consideration
must be given if installed in a closed or multi-unit rack assembly since the operating
ambient temperature of the rack environment may be greater than the room ambient.
Contact with thermal insulating materials should be avoided on all sides of the unit.
The QM-MD8X8 can be mounted in a rack or stacked with other equipment. Two
“ears” are provided with the QM-MD8X8 so that the unit can be rack mounted.
These ears must be installed prior to mounting. Complete the following procedure to
attach the ears to the unit. The only tool required is a #1 Phillips screwdriver.
WARNING: To prevent bodily injury when mounting or servicing this unit in a
rack, take special precautions to ensure that the system remains stable. The following
guidelines are provided to ensure your safety:
• When mounting this unit in a partially filled rack, load the rack from the
bottom to the top with the heaviest component at the bottom of the rack.
• If the rack is provided with stabilizing devices, install the stabilizers before
mounting or servicing the unit in the rack.
NOTE: If rack mounting is not required, rubber feet are provided for tabletop
mounting or stacking. Apply the feet near the corner edges on the underside of the
unit.
NOTE: Reliable earthing of rack-mounted equipment should be maintained.
Particular attention should be given to supply connections other than direct
connections to the branch circuit. (e.g., use of power strips).
To install the ears:
1. There are screws that secure each side of the QM-MD8X8 top cover. Using
a #1 Phillips screwdriver, remove the three screws closest to the front panel
from one side of the unit. Refer to the diagram following step 3 for a
detailed view.
2. Position a rack ear so that its mounting holes align with the holes vacated
by the screws in step 1.
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
3. Secure the ear to the unit with three screws from step 1, as shown in the
following diagram.
Ear Attachment for Rack Mounting
4. Repeat procedure (steps 1 through 3) to attach the remaining ear to the
opposite side.
Connecting the Device
Make the necessary connections as called out in the illustration that follows this
paragraph. Refer to “Network Wiring” on page 11 before attaching the 4-position
terminal block connector. Apply power after all connections have been made.
Hardware Connections for the QM-MD8X8
POWER:
24 VDC TO
QM INPUTS
1 - 4
QM INPUTS:
QUICKMEDIA PORT CARRIES
AUDIO, VIDEO, RGB, AND
NICROPHONE SIGNALS
NOTE: For optimum performance, Crestron strongly recommends using
CRESCAT-QM cable, available from Crestron. Other high-quality/low skew
CAT5e/CAT6 wiring may also be used with varying performance.
The required 24 VDC power for each group of QM inputs and QM outputs can be
supplied in a variety of ways. The following wiring diagram suggests one method of
applying 24 VDC power to the QM ports. In this configuration, the C2N-SPWS300
can supply up to 75 watts of power to each group of QM ports to ensure that
sufficient power is available for QM devices that are connected to the QM-MD8X8.
The C2N-SPWS300 can also supply the power required by the QM-MD8X8.
POWER:
24 VDC TO
QM INPUTS
5 - 8
POWER:
24 VDC TO
QM OUTPUTS
1 - 4
QM OUTPUTS:
QUICKMEDIA PORT CARRIES
AUDIO, VIDEO, RGB, AND
MICROPHONE SIGNALS
POWER:
24 VDC TO
QM OUTPUTS
5 - 8
CRESNET:
TO CONTROL
SYSTEM AND
OTHER CRESNET
DEVICES
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
Suggested Power Connections for QM-MD8X8
QUICKMEDIA RECEIVER/PROCESSOR
QM-RMCRX-BA
300 WATT POWER SUPPLY
C2N-SPWS300
Labeling the Buttons
QM-MD8X8
NOTE: The QM-MD8X8 can only be powered by the 4-position terminal block
connector labeled “NET”.
NOTE: Cresnet data is fed through the NET connector that is internally wired to the
4-position mini-terminal block connector at each QM connector.
NOTE: In the configuration shown, the C2N-SPWS300 can operate in the “PWR
ON” position or the “PWR OFF SLAVE” position. For more information, refer to
the latest revision of the C2N-SPWS300 System Power Supply Operations Guide
(Doc. 8190).
NOTE: Power to the QM ports on the QM-MD8X8 can be applied using other
configurations. The total power usage of each port group must not exceed the port
group’s available input power. For example, if 75 watts is supplied to QM inputs 1
through 4, the total power consumption for those ports cannot exceed 75 watts.
Use Crestron Engraver software to print custom labels for the QM-MD8X8’s front
panel buttons and LEDS. Crestron recommends printing on 100-pound paper. Paper
weighing less than 100 pounds will tend to crumple while sliding in, while paper
weighing more than 100 pounds may not fit.
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
Programming Software
Have a question or comment about Crestron software?
Answers to frequently asked questions (FAQs) can be viewed in the Online Help
section of the Crestron website. To post a question or view questions you have
submitted to Crestron’s True Blue Support, log in at http://support.crestron.com.
First-time users will need to establish a user account.
Earliest Version Software Requirements for the PC
NOTE: Crestron recommends that you use the latest software to take advantage of
the most recently released features. The latest software is available from the Crestron
website.
Crestron has developed an assortment of Windows-based software tools to develop
a Cresnet system. The following are the minimum recommended software versions
for the PC:
Software
TASK REQUIRED SOFTWARE VERSION
Program control system to
operate QM-MD8X8
Uploading program and firmware Crestron Toolbox 1.01.06 or later
Create labels for front panel
buttons
Simplified programming with
wizards for QuickMedia systems
(optional but recommended)
SIMPL Windows version 2.06.20 or later
with SIMPL+ Cross Compiler version 1.1 or
later and Library update 345 or later; Also
requires Crestron Database version 17.2.2
or later
Crestron Engraver 2.4.1.2 or later
Crestron SystemBuilder™ version 2.0 or
later with SystemBuilder Templates version
2.0 or later. Also requires:
SIMPL Windows 2.06.20 or later with
SIMPL Windows Library Update 345 or
later
Crestron database 17.2.2 or later
Crestron Toolbox 1.01.06 or later
Crestron Engraver 2.4.1.2 or later
VisionTools® Pro-e 3.3.4.0 or later
Programming with Crestron SystemBuilder
The easiest method of programming, but does not offer as much flexibility as SIMPL
Windows. For additional details, download SystemBuilder from the Crestron website
and examine the extensive help file.
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
Programming with SIMPL Windows
NOTE: While SIMPL Windows can be used to program the QM-MD8X8, it is
recommended to use SystemBuilder and Digital Media Tools software for
configuring and tuning a QuickMedia system.
SIMPL Windows is Crestron’s premier software for programming Crestron control
systems. It is organized into two separate, but equally important “Managers”.
Configuration Manager
Configuration Manager is the view where programmers “build” a Crestron control
system by selecting hardware from the Device Library.
• To incorporate the QM-MD8X8 into the system, drag the QM-MD8X8
from the Cresnet Control Modules | QM Series folder of the Device Library
and drop it in the System Views.
Locating the QM-MD8X8 in the Device Library
• The system tree of the control system displays the device in the appropriate
slot with a default Net ID of 06 as shown in the following illustration.
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
C2Net Device, Slot 5
Programming Manager
• Additional QM-MD8X8 devices are assigned different Net ID numbers as
they are added.
• Use the “Device Settings” window to change the Net ID, as shown in the
following figure.
“QM-MD8X8 Device Settings” Window
• The ID code specified in the SIMPL Windows program must match the Net
ID of each unit.
Programming Manager is the view where programmers "program" a Crestron control
system by assigning signals to symbols. The symbol can be viewed by double
clicking on the icon or dragging it into Detail View. A description for each signal in
the symbol is described in the SIMPL Windows help file (F1).
Example Program
An example program for the QM-MD8X8 is available from the “Example Program”
section of the Crestron website (http://www.crestron.com/exampleprograms). Search
for qm_8X8_demo.ZIP.
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
Uploading and Upgrading
Crestron recommends using the latest programming software and that each device
contains the latest firmware to take advantage of the most recently released features.
However, before attempting to upload or upgrade, it is necessary to establish
communication.
Establishing Communication
Use Crestron Toolbox for communicating with the QM-MD8X8; refer to the
Crestron Toolbox help file for details. There is a single method of communication;
indirect communication via the control system.
Indirect Communication via Control System
PC RUNNING
CRESTRON TOOLBOX
SERIAL,
ETHERNET
OR USB
CONTROL SYSTEM QM-MD8X8
CRESNET
• QM-MD8X8 connects to the control system via Cresnet.
• Establish communications between the PC and the control system as
described in the latest version of the 2-Series Reference Guide (Doc. 6256).
Programs and Firmware
• Display the network device tree (Tools | Network Device Tree); to show
all network devices connected to the control system. Right-click on the
QM-MD8X8 to display actions that can be performed on the QM-MD8X8:
Upgrade firmware ⇒
⇒ Change Net ID
• Upload the SIMPL Windows file to the control system using SIMPL
Windows or Crestron Toolbox.
• Upgrade QM-MD8X8 firmware via Crestron Toolbox.
For details on uploading and upgrading, refer to the SIMPL Windows help file or the
Crestron Toolbox help file.
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
Operation
Operating Modes
The QM-MD8X8 operates in either the System mode or the Local mode.
System Mode
Local Mode
Viewing Source Routing
Viewing Output Routing
Switching functions controlled by control system program. Press the SYS button to
activate System mode.
• When in System mode, pressing input or output buttons shows
source/destination information.
Switching functions controlled by front panel buttons. Press LOCAL to activate
Local mode (accompanying LED will flash).
• Local mode may not be available if the buttons on the front panel are locked
by the control system. If the buttons are locked, the LOCAL LED will
rapidly flash three times and turn off.
System Mode Operation-Viewing Signal Routing
Press an input signal button to display all of the outputs that are connected to it.
Press an output signal button to display the input signal that is connected. All outputs
that are receiving the same input signal are also displayed.
The AUDIO BREAK LED will illuminate if there is any difference between the
audio and video route for any signal. The A and V LEDs indicate which portion of a
signal is displayed. Press A or V to select the portion to display.
NOTE: The AUDIO BREAK button has no function when the QM-MD8X8 is
operating in the System mode.
Local Mode Operation-Switching Signal Routing
Signals coming in to the QM-MD8X8 can be switched to individual or multiple
output locations. Additionally, the audio and video portions of an input signal can be
switched simultaneously or separately.
Switching Audio & Video
Simultaneously
Operations Guide – DOC. 6260A 8X8 QuickMedia™ Switcher: QM-MD8X8 • 19
1. Press LOCAL to place the QM-MD8X8 in the Local mode (the LOCAL
LED is flashing slowly).
2. Press AUDIO BREAK to turn off the audio break function. The AUDIO
BREAK LED will turn off and the V LED will be on.
NOTE: If any outputs have different audio and video sources, the audio
inputs will switch to match the video inputs.
3. Press the button corresponding to the input to be switched. The LED of the
selected input will light.
4. Press the button(s) corresponding to the output(s) to be switched. The
LED(s) of the selected output(s) will light.
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
To disable routing to a specific output, press the corresponding output
button again. The LED will turn off.
If a button press will result in changing the current routing, the ENTER
LED will flash rapidly.
5. Press ENTER to make the connection(s) shown on the front panel. The
ENTER LED will turn off.
Changes made on the front panel are made only after the ENTER button is
pressed. If you do not press ENTER, the connection is not made.
NOTE: If ENTER has not been pressed, you can go back and “undo”
changes made to the current routing.
Switching Audio & Video
Separately
1. Press LOCAL to place the QM-MD8X8 in the Local mode (the LOCAL
LED is flashing slowly).
2. Press AUDIO BREAK to turn on the audio break function. The AUDIO
BREAK and A LEDs will turn on.
3. Press the button corresponding to the audio portion of the input to be
switched. The LED of the selected input will light.
4. Press the button(s) corresponding to the output(s) to be switched. The
LED(s) of the selected output(s) will light.
To disable audio routing to a specific output, press the corresponding output
button again. The LED will turn off.
If a button press will result in changing the current routing, the ENTER
LED will flash rapidly.
5. Press ENTER to make the audio connection(s) shown on the front panel.
The ENTER LED will turn off.
Changes made on the front panel are made only after the ENTER button is
pressed. If you do not press ENTER, the connection is not made.
NOTE: If ENTER has not been pressed, you can go back and “undo”
changes made to the current routing.
6. Press V to switch the video portion of a signal. The A LED will turn off and
the V LED will turn on.
7. Press the button corresponding to the video portion of the input to be
switched. The LED of the selected input will light.
8. Press the button(s) corresponding to the output(s) to be switched. The
LED(s) of the selected output(s) will light.
To disable video routing to a specific output, press the corresponding output
button again. The LED will turn off.
If a button press will result in changing the current routing, the ENTER
LED will flash rapidly.
9. Press ENTER to make the video connection(s) shown on the front panel.
The ENTER LED will turn off.
Changes made on the front panel are made only after the ENTER button is
pressed. If you do not press ENTER, the connection is not made.
NOTE: If ENTER has not been pressed, you can go back and “undo” and
changes made to the current routing.
20 • 8X8 QuickMedia™ Switcher: QM-MD8X8 Operations Guide – DOC. 6260A
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
Problem Solving
Troubleshooting
The following table provides corrective action for possible trouble situations. If
further assistance is required, please contact a Crestron customer service
representative.
QM-MD8X8 Troubleshooting
TROUBLE POSSIBLE CAUSE(S) CORRECTIVE ACTION
Device does not
function.
PWR LED does
not illuminate.
NET LED does
not illuminate.
Poor picture
quality.
Device is not
communicating with the
network.
Device is not receiving
power from a Crestron
power source.
Device is not receiving
sufficient power.
QM-MD8X8 is not
receiving power.
QM-MD8X8 Net ID is
not set to match the Net
ID of the SIMPL
Windows program.
Cables improperly
connected.
Incorrect skew settings
in the QM-RMCRX
device.
Use Crestron Toolbox to poll
the network. Verify network
connection to the device.
Use the provided Crestron
power source. Verify
connections.
Use the Crestron Power
Calculator to help calculate
how much power is needed
for the system.
Verify that cables plugged
into the NET ports are
secure.
Using Crestron Toolbox, poll
the network. Verify that the
Net ID for the QM-MD8X8 is
set to match the ID specified
in the SIMPL Windows
program.
Verify that all cables are
secure.
Use QM Tools software to set
correct skew settings for each
QM-RMCRX in the system.
Check Network Wiring
Use the Right Wire
Calculating Power
Operations Guide – DOC. 6260A 8X8 QuickMedia™ Switcher: QM-MD8X8 • 21
In order to ensure optimum performance over the full range of your installation
topology, Crestron Certified Wire, and only Crestron Certified Wire, may be used.
Failure to do so may incur additional charges if support is required to identify
performance deficiencies as a result of using improper wire.
CAUTION: Use only Crestron power supplies for Crestron equipment. Failure to do
so could cause equipment damage or void the Crestron warranty.
CAUTION: Provide sufficient power to the system. Insufficient power can lead to
unpredictable results or damage to the equipment. Please use the Crestron Power
Calculator to help calculate how much power is needed for the system
(http://www.crestron.com/calculators
).
When calculating the length of wire for a particular Cresnet run, the wire gauge and
the Cresnet power usage of each network unit to be connected must be taken into
consideration. Use Crestron Certified Wire only. If Cresnet units are to be daisy-
Page 26
8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
chained on the run, the Cresnet power usage of each network unit to be daisy-chained
must be added together to determine the Cresnet power usage of the entire chain. If
the unit is a home-run from a Crestron system power supply network port, the Cresnet
power usage of that unit is the Cresnet power usage of the entire run. The wire gauge
and the Cresnet power usage of the run should be used in the following equation to
calculate the cable length value on the equation’s left side.
Cable Length Equation
40,000
Where:
L <
R x P
Make sure the cable length value is less than the value calculated on the right side of
the equation. For example, a Cresnet run drawing 20 watts should not have a length of
run more than 333 feet.
NOTE: All Crestron certified Cresnet wiring must consist of two twisted pairs. One
twisted pair is the +24V conductor and the GND conductor, and the other twisted pair
is the Y conductor and the Z conductor.
L = Length of run (or chain) in feet.
R = 6 Ohms (Crestron Certified Wire: 18 AW G (0.75 MM
P = Cresnet power usage of entire run (or chain).
2
))
Stripping/Tinning Wire
Adding Hubs
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.
For larger networks (i.e., greater than 28 network devices), it may become necessary
to add a Cresnet Hub/Repeater (CNXHUB) to maintain signal quality throughout the
network. Also, for networks with lengthy cable runs, it may be necessary to add a
Hub/Repeater after only 20 devices.
Reference Documents
The latest version of all documents mentioned within the guide can be obtained from
the Crestron website (http://www.crestron.com/manuals
of product manuals arranged in alphabetical order by model number.
List of Related Reference Documents
DOCUMENT TITLE
2-Series Control Systems Reference Guide
MediaManager Applications Guide
). This link will provide a list
Further Inquiries
If you cannot locate specific information or have questions after reviewing this
guide, please take advantage of Crestron's award winning customer service team by
calling the Crestron corporate headquarters at 1-888-CRESTRON [1-888-273-7876].
For assistance in your local time zone, refer to the Crestron website
(http://www.crestron.com/) for a listing of Crestron worldwide offices.
You can also log onto the online help section of the Crestron website to ask
questions about Crestron products. First-time users will need to establish a user
account to fully benefit from all available features.
22 • 8X8 QuickMedia™ Switcher: QM-MD8X8 Operations Guide – DOC. 6260A
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Crestron QM-MD8X8 8X8 QuickMedia™ Matrix Switcher
Future Updates
As Crestron improves functions, adds new features, and extends the capabilities of
the QM-MD8X8, additional information may be made available as manual updates.
These updates are solely electronic and serve as intermediary supplements prior to
the release of a complete technical documentation revision.
Check the Crestron website periodically for manual update availability and its
relevance. Updates are identified as an “Addendum” in the Download column.
Operations Guide – DOC. 6260A 8X8 QuickMedia™ Switcher: QM-MD8X8 • 23
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8X8 QuickMedia™ Matrix Switcher Crestron QM-MD8X8
Return and Warranty Policies
Merchandise Returns / Repair Service
1. No merchandise may be returned for credit, exchange, or service without prior authorization from
CRESTRON. To obtain warranty service for CRESTRON products, contact an authorized
CRESTRON dealer. Only authorized CRESTRON dealers may contact the factory and request an
RMA (Return Merchandise Authorization) number. Enclose a note specifying the nature of the
problem, name and phone number of contact person, RMA number, and return address.
2. Products may be returned for credit, exchange, or service with a CRESTRON Return Merchandise
Authorization (RMA) number. Authorized returns must be shipped freight prepaid to CRESTRON, 6
Volvo Drive, Rockleigh, N.J. or its authorized subsidiaries, with RMA number clearly marked on the
outside of all cartons. Shipments arriving freight collect or without an RMA number shall be subject to
refusal. CRESTRON reserves the right in its sole and absolute discretion to charge a 15% restocking
fee, plus shipping costs, on any products returned with an RMA.
3. Return freight charges following repair of items under warranty shall be paid by CRESTRON,
shipping by standard ground carrier. In the event repairs are found to be non-warranty, return freight
costs shall be paid by the purchaser.
CRESTRON Limited Warranty
CRESTRON ELECTRONICS, Inc. warrants its products to be free from manufacturing defects in materials and
workmanship under normal use for a period of three (3) years from the date of purchase from CRESTRON,
with the following exceptions: disk drives and any other moving or rotating mechanical parts, pan/tilt heads and
power supplies are covered for a period of one (1) year; touchscreen display and overlay components are
covered for 90 days; batteries and incandescent lamps are not covered.
This warranty extends to products purchased directly from CRESTRON or an authorized CRESTRON dealer.
Purchasers should inquire of the dealer regarding the nature and extent of the dealer's warranty, if any.
CRESTRON shall not be liable to honor the terms of this warranty if the product has been used in any
application other than that for which it was intended, or if it has been subjected to misuse, accidental damage,
modification, or improper installation procedures. Furthermore, this warranty does not cover any product that
has had the serial number altered, defaced, or removed.
This warranty shall be the sole and exclusive remedy to the original purchaser. In no event shall CRESTRON
be liable for incidental or consequential damages of any kind (property or economic damages inclusive) arising
from the sale or use of this equipment. CRESTRON is not liable for any claim made by a third party or made by
the purchaser for a third party.
CRESTRON shall, at its option, repair or replace any product found defective, without charge for parts or labor.
Repaired or replaced equipment and parts supplied under this warranty shall be covered only by the unexpired
portion of the warranty.
Except as expressly set forth in this warranty, CRESTRON makes no other warranties, expressed or implied,
nor authorizes any other party to offer any warranty, including any implied warranties of merchantability or
fitness for a particular purpose. Any implied warranties that may be imposed by law are limited to the terms of
this limited warranty. This warranty statement supercedes all previous warranties.
Trademark Information
All brand names, product names, and trademarks are the sole property of their respective owners. Windows is a registered trademark of
Microsoft Corporation. Windows95/98/Me/XP and WindowsNT/2000 are trademarks of Microsoft Corporation.
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Page 32
Crestron Electronics, Inc. Operations Guide – DOC. 6260A
15 Volvo Drive Rockleigh, NJ 07647 (2009922)
Tel: 888.CRESTRON 02.06
Fax: 201.767.7576 Specifications subject to
www.crestron.com change without notice.
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