QuickMedia™ Matrix Switcher/Mixer
Crestron
QM-MD7x2
Functional Summary(continued)
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Cresnet connector for each QM port simplifies the use of QM cables
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Switching operations can be performed through a Crestron control
system or the QM-MD7x2’s front panel
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Custom-labeled front panel buttons provide local control of switching
functions
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Expandable switching capabilities by connecting to other MD7x2s,
QM-MD8x8s, or QM-MD4x2 switchers
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Touch-settable ID (TSID) ready
The MD7x2 is a QuickMedia™ (also known as QM) signal routing device used for
the mixing, switching, and routing of audio, video, microphone, and QM signals
within a QM system. Audio, video, and microphone input signals can be separately
switched to either of the two QM/line-level output ports. The presence of an MD7x2
in a system does not necessarily improve or degrade QM signal quality, nor does it
increase or decrease the length of QM cable that can be used. An MD7x2 can be
connected to additional MD7x2s or other QM switchers (such as the QM-MD8x8 or
QM-MD4x2) to provide additional switching capabilities.
Switching
Audio and video input signals are independently switched to the output ports. Both
QM outputs can be driven simultaneously and independently.
Any of the seven video input signals can be switched to either of the two QM
outputs. The seven audio inputs can be switched to either or both of the QM outputs
and mixed into the program audio or speech channels of the local audio outputs.
The microphone signals from the local microphone inputs and the two QM inputs
can be individually switched to the speech channel of either QM/Audio output.
Mixing
The MD 7x2 has built in mixers for the mixing of microphone and program audio
signals.
Microphone Mixing
Each of the QM inputs can carry up to two microphone channels from a remote QM
transmitter. Additionally, there are two local microphone inputs on the MD7x2 that
can receive microphone-level or line-level microphone signals.
All of the microphone signals are fed into two microphone mixers while four bands
of equalization are applied to each microphone. The output of each mixer is routed to
the microphone channel of the corresponding QM output (mic mixer 1 to QM output
1) and the speech and program audio mixers of the corresponding local audio output
(mic mixer 1 to local audio output 1).
Program Mixing
A mixing stage is provided at each line-level output. The microphone mix described
previously, and the selected audio input is fed to this mixer. The mixer mixes the
program audio and the microphone signal into two outputs, program (stereo) and
speech (monaural). The microphone mix can be mixed into the stereo program and
the stereo program can be mixed into the speech. After mixing, volume, equalization
and tone control can be applied.
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QuickMedia™ Matrix Switcher/Mixer: QM-MD7x2
Operations Guide - DOC. 6273
