Automatic Gain Control (AGC)

This article explains the Automatic Gain Control (AGC) function in Exigo.

By enabling AGC gain will be automatic adjusted according to the background noise level.
AGC can be enabled on Access Panels and Kits.

Configuration

Enabling AGC:

Desired endpoint -> Audio Lines -> Electret mic as independent input -> agc

Automatic Gain Control

There are 4 different AGC Modes:

• Disabled
• Quiet Area
• Noisy Area
• Manual Control

Manual Control

With manual control it is possible to adjust several parameters to get the optimal AGC needed.

Automatic Gain Control - Manual Control

AGC Mode: Manual Control

Max PGA:

Attack Time:

Decay Time:

Gain Hysteresis:

Hysteresis:

Noise Debounce:

Noise Threshold:

Signal Debounce:

Target Level: This represents the nominal output level that the AGC attempts to hold the ADC output signal. It is expressed relative to full scale range of the ADC range (in db) so it is recommended that the target level be set with enough margin to avoid clipping of loud signals.

Availability

This function is available from Exigo 1.3.3 and newer.