Crestron QuickMedia QM-MD7x2, Operation Manual

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Crestron QM-MD7x2 QuickMedia™ Matrix Switcher/Mixer
QM-MD7x2, Slot 2 Digital Input Signal Descriptions
INPUT DESCRIPTION
Mic1Mute and Mic2Mute Mutes the MIC 1 or MIC 2 audio for as long as the
input is high.
Mic1GatingEnable and
Mic2GatingEnable Enables noise gating for MIC 1 or MIC 2, for as
long as the input is high.
Gating eliminates unwanted background noise that
could prove distracting when amplified. The noise
gate will not pass an audio signal unless it is
above the threshold, set by the
GatingLevel input.
Mic1PhantomEnable and
Mic2PhantomEnable Enables the 48V phantom power supply for MIC 1
or MIC 2, for as long as the input remains high.
Phantom power is required by condenser
microphones, but should be disengaged for
dynamic microphones.
QM-MD7x2, Slot 2 Analog Input Signal Descriptions
INPUT DESCRIPTION
Mic1GatingLevel and
Mic2GatingLevel Sets the threshold for gating.
The noise gate is enabled for as long as the
GatingEnable input is high.
Valid gating values range from 0% to 100%.
Once the microphone audio rises above
GatingLevel the gate opens, allowing the signal to
pass through. If the MicNominal feedback pulses
while the MicGate feedback remains low, this
indicates a threshold that is set too high.
Mic1Gain and Mic2Gain Adjusts the gain of the MIC 1 or MIC 2 input.
Valid values range from 0% to 100%. This maps
into the following ranges:
Mic-level input: -60 dBV to -20 dBV
(-58 dBU to -18 dBU)
Line-level input: -28 dBV to +12 dBV
(-26 dBu to +14 dBu)
AttackTime Sets the time, in milliseconds, that it takes for the
noise gate to fully open after the signal exceeds
the
GatingLevel . This prevents short spikes in the
input signal level, such as coughing, from opening
the gate.
The attack time applies to both microphones.
Valid analog values range from 0d (0ms) to 100d
(100ms), with 10d to 40d being the most usable
range.
DecayTime Sets the time, in milliseconds, over which the
noise gate will close. This prevents the sound from
stopping too abruptly—for example, during brief
pauses in speech.
The decay time applies to both microphones.
Valid analog values range from 0d (0ms) to 5000d
(5000ms, or 5s), with 1000d to 3000d (1s to 3s)
being the most usable range.
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Operations Guide - DOC. 6273 QuickMedia™ Matrix Switcher/Mixer: QM-MD7x2
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