Automatic Gain Control (Agc) - dbx Zone Pro 1260 User Manual

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ZonePRO
Section 4
Detailed Parameters
4.4 - AGC ( Insert and DYN Module)
The AGC is used to keep the average level of a signal constant. This is done by selecting a
desired Target output level and Window. The AGC keeps the signal within the Window about
the selected Target by slowly adjusting the gain. The maximum gain that can be applied to the
signal is selected by the Gain parameter. When the input signal falls below the Threshold the
AGC stops adding gain and returns to unity. This prevents the AGC from adding gain when
there is no signal present and raising the system noise floor. High level peak signals are
reduced by a fast limiter to prevent distortion by clipping. The AGC Threshold meters show
what region of the AGC the input signal is in. The T (yellow) indicates the signal is within the
Window. A + (red) indicates the signal is above the target window. A – (green) indicates the
AGC is adding adding Gain and is at or below the window. When the Threshold meter is off
the signal is below the Threshold. The AGC module also includes a dedicated Limiter.
AGC On/Off
Turns the AGC module On and Off.
Target -20 to 20 dB
The Target parameter defines where you would like the average level of the AGC output to be.
If the average level of the signal rises above the Target the gain will be reduced. For signals
with an average level below the Target the gain will be increased.
Gain 1 to 20dB
This adjusts the maximum amount of gain that can be added by the AGC.
Window 1 to 10dB
This adjusts the amount of variation in the output
Low Threshold -60 to -30dB
The Low Threshold sets a lower limit to the AGC. This prevents the AGC from adding gain to
low level signals or noise.
ZonePRO ™ User Manual
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