Difference between revisions of "Automatic Gain Control (AGC)"
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'''Max PGA''': | '''Max PGA''': | ||
| − | '''Attack Time''': | + | '''Attack Time''': This determines how quickly the AGC circuitry decreases the PGA gain when the input signal exceeds the target level. |
| + | It is expressed in fractions of ADC sampling rates. | ||
'''Decay Time''': | '''Decay Time''': | ||
Revision as of 12:14, 26 September 2017
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
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.
AGC Mode: Manual Control
Max PGA:
Attack Time: This determines how quickly the AGC circuitry decreases the PGA gain when the input signal exceeds the target level. It is expressed in fractions of ADC sampling rates.
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.
