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QM-FTCC Microphone Control – Signal Descriptions
SIGNAL TYPE AND
NAME
DESCRIPTION
Digital inputs:
<Mic1Mute>
<Mic2Mute>
Mutes the MIC 1/LINE 1 or MIC 2/LINE 2 audio for
as long as the input is high.
High/1 (level sensitive) = Mute audio; Low/0 = Un-
mute audio
Digital outputs:
<Mic1Mute-F>
<Mic2Mute-F>
Indicates that the corresponding MIC/LINE input is
muted.
High/1 = Mic audio is muted; Low/0 = Mic audio is
not muted
Digital inputs:
<Mic1GatingEnable>
<Mic2GatingEnable>
Enables noise gating for MIC 1/LINE 1 or MIC
2/LINE 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.
High/1 (level sensitive) = Enable gating; Low/0 =
Disable gating
Digital outputs:
<Mic1GatingEnable-F>
<Mic2GatingEnable-F>
Indicates the current status of the noise gate for the
corresponding MIC/LINE input.
High/1 = Gating is enabled; Low/0 = Gating is
disabled
Digital outputs:
<Mic1Gate>, <Mic2Gate>
Indicates that the signal level on MIC 1/LINE 1 or
MIC 2/LINE 2 has exceeded the <GatingLevel>.
High/1 = Gating level exceeded; Low/0 = Gating
level not exceeded
Digital outputs:
<Mic1Nominal>
<Mic2Nominal>
Indicates that the signal level on MIC 1/LINE 1 or
MIC 2/LINE 2 has exceeded the nominal level.
The nominal indication is reported at 10% of the
maximum level supported by the hardware, or 20dB
below the input clip level.
High/1 = Nominal level exceeded;
Low/0 = Nominal level not exceeded
Digital outputs:
<Mic1Clip>
<Mic2Clip>
Indicates that the signal level on MIC 1/LINE 1 or
MIC 2/LINE 2 has exceeded 50% of the maximum
level supported by the hardware, or 6dB below the
input clip level. This signifies a mic level that is too
hot.
High/1 = Mic signal clipping;
Low/0 = Mic level not clipping
Digital input:
<PhantomEnable>
Enables the 48V phantom power supply for as long
as the input remains high. (Phantom power is
required by condenser microphones, but should be
disengaged for dynamic microphones.)
High/1 (level sensitive) = Enable phantom power;
Low/0 = Disable phantom power
Digital output:
<PhantomEnable-F>
Indicates that phantom power has been enabled.
High/1 = Phantom power is on; Low/0 = Phantom
power is off
Analog inputs:
<Mic1GatingLevel>
<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.
Continued on the following page
Operations & Installation Guide – DOC. 6313A FlipTop Computer Center: QM-FTCC • 37