XMP 240 C AT • DSP Configurator Software
28
AEC Operation
Double-click the
AEC
block to open the
AEC
drop-down menu. Select
AEC
to insert the AEC
processor.
Figure 43.
AEC Block and Drop-Down Menu
NOTE:
Insert the AEC processor on the input with the near end microphone connected.
Once the AEC processor is inserted, double-click the
AEC
block to open the
AEC
dialog box.
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Show/Hide Advanced Options Button
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Figure 44.
AEC Dialog Box
Activity Panel
—
Far
lights when signal activity is detected from the far end.
Near
lights when activity is detected from the near end.
Update
lights when AEC is updating,
converging, or reconverging.
ERL Meter
— ERL (echo return loss) is the ratio of the far end signal at the reference
input to the far end signal received at the mic input and is expressed in dB. This meter
should read between -10 dB and +10 dB for proper AEC operation.
ERLE Meter
— ERLE (echo return loss enhancement) is the amount of potential
echo signal that the AEC algorithm is cancelling (not including NLP processing) and is
expressed in dB.
TER Meter
— TER (total echo reduction) is the sum of ERL and ERLE and represents
the total amount of echo reduction and is expressed in dB.
figure 25. AEC Dialog Box