To Adjust The Agc - QSC MP-M80 User Manual

Music & paging zone mixer
Hide thumbs Also See for MP-M80:
Table of Contents

Advertisement

Input Channel – USB Dynamics
Automatic Nain Control (ANC)
The Automatic Gain Control is used to compensate for
variations in the audio level of the source material.
1.
Dynamics
button – Selects the AGC screen.
2.
switch – Engages and disengages the
ANC In
AGC processor.
3.
Reset
button
Sets all the AGC controls, for this
channel, to their factory default position.
4.
Input
meter
Displays the RMS input signal level
5.
meter
Indicates how much the signal
Reduction
level has been altered by the AGC. The center (0
dB) indicates that no gain change is being applied.
Rightward movement of the meter indicates that
gain is being applied. Leftward movement indicates
attenuation (reduction) of the signal level.
6.
meter
Indicates the output signal level
Output
after AGC has been applied.
7.
graph – Vertical scale from 0 dB to -60 dB.
ANC
When the AGC is engaged, the trace is displayed.
a.
– Indicates the maximum level
Max Target
that the AGC will maintain.
b.
– Indicates the minimum level that
Min Target
the AGC will attempt to maintain.
c.
Threshold
– Indicates the level at which the AGC becomes active / inactive.
8.
slider
Sets the maximum level that the AGC will maintain.
Max Target
9.
slider – Sets the minimum level that the AGC will attempt to maintain.
Min Target
10.
slider – Sets a limit on the amount of gain the AGC will apply regardless of the target settings.
Max Nain
11.
Threshold
slider – Sets the level at which the AGC becomes active / inactive. Signals that fall below the threshold level are assumed to be
intentional silence and the AGC will apply no additional gain.
12.
Release
slider – Adjusts how long the AGC holds its gain change after the input signal level changes.
13.
ANC
in/out indicator – When the AGC is In, an orange "D" displays on the channel controls strip.
NOTE!:
The AGC should not be used on microphone inputs if there is any possibility of feedback.
If the source device lacks an output volume control, use the input channel gain control to simulate low and high level playback. Use
the Cue output and headphones to listen to the results of the AGC.

To Adjust the AGC

1. Using program material that is slightly greater in level than the desired maximum signal level, adjust the Max Target slider until the Reduction
indicates a slight amount of gain reduction by moving to the left of center.
2. Using program material that is slightly lower in level than the desired minimum signal level, adjust the Min Target slider until the Reduction
Meter indicates a slight amount of gain addition by moving to the right of center.
3. If some low-level passages of the program material are being boosted excessively, use the Max Gain control to decrease the maximum gain the
AGC applies.
4. With no program material playing, adjust the Threshold so that the Reduction Meter shows no additional gain being applied. This adjustment
prevents the AGC from applying full gain to residual noise from the sources when no signal is present.
TD-001578-01-C
Touch
Inputs
1
2
4
5
7
7a
7b
10
7c
11
12
20
Touch Input
Bank More
More
3
6
8
9
Touch the
Dynamics Button
13

Hide quick links:

Advertisement

Table of Contents
loading

This manual is also suitable for:

Mp-m40

Table of Contents