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WINDOW
[1dB - 10dB]
This parameter sets the amount of target level deviation allowed. For most
applications, a window of 2 to 3 dB maintains the signal adequately. The AGC
Window Indicator (shown to the right) indicates when the input signal level is below
the window, in the target region, or above the window.
WINDOW INDICATOR
Input Signal Below Window
Input Signal In Target Region
Input Signal Above Window
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LOW THRESHOLD
[-80dB - -50dB]
Sets a lower limit on AGC processing. When the signal level falls below this setting, AGC will no longer try to add gain.
This prevents AGC from adding gain and raising the system’s noise floor when no signal is present.
•
ATTACK
[1s - 10s]
Adjusts how fast AGC will reduce gain when the signal level is above target.
•
RELEASE
[10dB/s - 0.1dB/s]
Adjusts the rate of gain increase when the signal level drops below target.
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LIM THRESHOLD
AGC is designed to add or remove gain slowly so that the overall response will
sound natural. Because of its slow nature, a limiter is provided to control the loud,
fast-acting signals. The LIM THRESHOLD parameter adjusts the level at which
limiting will occur and can be set from the top of the AGC window up to 0dBFS.
The Limiter Threshold Indicators (shown to the right) indicate when signal is below
threshold or above threshold.
THRESHOLD INDICATOR
Signal Below Threshold
Signal Above Threshold
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LIM AUTO
[OFF, ON]
Turns Auto mode for the AGC Limiter on and off. When turned off, limiter attack and release times will be determined
by the LIM ATTACK and LIM RELEASE parameters. When turned on, limiter attack and release times will be
program-dependent, meaning they will adjust automatically and dynamically based on input signal characteristics. When
LIM AUTO is on, manual LIM ATTACK and LIM RELEASE settings will be ignored.
•
LIM ATTACK
[100µs - 200ms]
Sets the speed at which the AGC Limiter starts to reduce the signal level once it has crossed threshold. When LIM
AUTO is on, this parameter is ignored and set dynamically.
•
LIM RELEASE
[360dB/s - 5dB/s]
Sets the rate at which the AGC Limiter will come out of gain reduction once the signal level drops back below threshold.
When LIM AUTO is on, this parameter is ignored and set dynamically.
