Polycom C16 User Manual
Page 315
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TroubleShooting
10 - 7
Because the AEC reference is available after the fader as presented in Chapter
3 and shown in the following figure, the result is that the AEC reference is also
attenuated and therefore the echo canceller would not be able to remove the
echo because the reference level is attenuated too much.
The solution to this issue is to use the line output gain instead of the fader to
attenuate the signal to match it to the signal level requirements of the next
piece of equipment in the signal chain. Changing these settings are shown in
Output Processing
Mute
Output from
Matrix
Dynamics
Processing
Parametric
or Graphic
Equalization
Fader
Delay
AEC
Reference
D/A
Converter
Output
Signal
Analog
Gain
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