Tandberg 1500MXP Manuel d'utilisateur télécharger pdf (Page 169)

Administrator Settings

157

4.5.5 Audio Leveling (AGC)

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 leveling is not activated.

Note that to ensure correct behavior 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.

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Tandberg 1500MXP Manuel d'utilisateur Page 169