Extron electronics XMP 240 C AT User Manual page 34

AEC Operation
Double-click the block to open 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
Activity Panel
1
ERL Meter
2
ERLE Meter
3
TER Meter
4
Reference Selection Drop-Down
5
Noise Cancellation Panel
6
Figure 44. AEC Dialog Box
Activity Panel — lights when signal activity is detected from the far end.
1 Far
lights when activity is detected from the near end.
converging, or reconverging.
ERL Meter — ERL (echo return loss) is the ratio of the far end signal at the reference
2
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
3
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
4
the total amount of echo reduction and is expressed in dB.
drop-down menu. Select
AEC
block to open the
AEC
Bypass Button
7
OK Button
8
Cancel Button
9
Show/Hide Advanced Options Button
¢
AEC Help Button
£
lights when AEC is updating,
Update
XMP 240 C AT • DSP Configurator Software
to insert the AEC
AEC
dialog box.
AEC
Near
28