ATEIS IDA8 User Manual
Page 426
ATEIS - IDA8
426
© 2012 ATEÏS
As the noise level is nearer than during the calibration, the differential level is almost null. You can
see the AGC level is about 0 dB which means no compensation.
Increase Zone:
If the sensing microphone detects more noise than during calibration, the A.N.G. works in the
"Increase Zone" which means that the gain must be increased to compensate for the ambient noise.
See the picture below:
In this case, the noise is now louder than during calibration. The Differential level is around 4.4dB.
You can see the AGC level shows 3.5dB which means the P.M. signal is increased to 3.5dB. As
soon as the AGC level reaches the level needed to compensate for the ambient noise (or the Max
Gain), the A.N.G. will turn to the "Dead Zone".
Fast Increase Zone: