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36 • FlipTop Data Center: QM-FTDC
The parameters that are associated with QM inputs are stored in the transmitter.
Input compensation and Mic EQ are examples of this. This information is then
transmitted along with the digital audio. The DSP that does the compensation
and EQ are in the receiver, but the settings now travel with the audio signal.
When you have switchers in-between the transmitter and receiver, the program
does not have to keep track of the routes and recall the preset in the receiver for
these functions. Now the receiver automatically gets this information when the
route is made, with no programming required. In addition we send the Cresnet
ID (or a user defined number for systems with multiple Cresnets), which will be
used by the receiver to automatically recall the video peaking/gain/skew
parameters.
QM-FTDC Microphone Control – Signal Descriptions
SIGNAL TYPE AND
NAME
Digital inputs:
< Mic1Mute >
< Mic2Mute >
Digital outputs:
< Mic1Mute-F >
< Mic2Mute-F >
Digital inputs:
< Mic1GatingEnable >
< Mic2GatingEnable >
Digital outputs:
< Mic1GatingEnable-F >
< Mic2GatingEnable-F >
Digital outputs:
< Mic1Gate >
< Mic2Gate >
Digital outputs:
< Mic1Nominal >
< Mic2Nominal >
Digital outputs:
< Mic1Clip >
< Mic2Clip >
Digital input:
< PhantomEnable >
Continued on the following page
Crestron QM-FTDC
DESCRIPTION
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
Indicates that the corresponding MIC/LINE input is muted.
High/1 = Mic audio is muted; Low/0 = Mic audio is not
muted
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
Indicates the current status of the noise gate for the
corresponding MIC/LINE input.
High/1 = Gating is enabled; Low/0 = Gating is disabled
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
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
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
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
Operations & Installation Guide - DOC. 6312A
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