TANDBERG 7000 MXP
4.5.5Audio Levelling (AGC)
| On |
| Select On to allow automatic adjustments (Automatic Gain Control) of audio levels. |
|
|
|
| When On, the AGC maintains the audio signal level at a fixed value by attenuating |
|
|
|
| strong signals and amplifying weak signals. Very weak signals, i.e. noise alone, will |
|
|
|
| not be amplified. |
|
|
|
|
|
|
|
|
|
|
|
| Off |
| Audio levelling is not activated. |
|
|
|
|
|
|
Note that to ensure correct behaviour of the AGC, it is crucial that the levels on the input connectors are adjusted correctly using the audio input level settings. The AGC will not compensate for severe maladjustment of input levels.
When applying a weak signal in the presence of strong background noise, the AGC might amplify the background noise as well as the signal. Therefore, in noisy environments, it is advisable to turn the AGC off.
Example:
In most conferences, the participants will speak at different levels, and be at different distances from the microphones. As a result, some of the participants would be harder to hear than others. The AGC corrects this problem by automatically increasing the microphone levels when “quiet” or “distant” people speak, and by decreasing the microphone levels when “louder” people speak.
174
