ATEIS IDA8C - Manual (Page 296)

Ateis Studio 296
© 2012 ATEÏS
level is not stable around0 dB, user could adjust the gain of output function, amplifier or
sensing microphone to let AGC level stable around 0 dB.
When the system is calibrating, clicking on the calibration button will cancel the calibration at
that moment. (The system will use the calibration result which was successfully calibrated at
last time.)
After calibration successful, the paging microphone shouldn't be placed nearly to sensing
microphone.(because the user's voice will be also received into sensing microphone.)
AGC level is still calculating even in inactivate mode.The level is depend on background
noise. It will support a good initial gain for paging level.
Use the A.N.G
When the calibration green led lit, the system is ready. In our example, the A.N.G has detected an
ambient noise average of -12dB. We choose a medium "response speed" and a short "sampling
time" to be enough reactive quickly.
Now the A.N.G will automatically adjust the level on the (P.M) signal depending on the ambient
noise detected on the sensing microphone. The A.N.G will working when the paging activity led will
light, meaning that an audio signal is detected on the (P.M) input.
Dead Zone:
If the sensing microphone doesn't detect more noise than during the calibration, the A.N.G works in
the "Dead Zone" which means that there is no need to adjust the gain.