Extron electronics DMP 128 FlexPlus User Manual page 37

Activity Panel
1
ERL Meter
2
ERLE Meter
3
TER Meter
4
Reference Selection Drop-Down
5
Noise Cancellation Panel
6
Figure 47. AEC Dialog Box
Activity Panel —
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.
Reference Selection Drop-Down Menu — Provides all mic/line inputs, Aux inputs,
5
virtual returns, line outputs, and Expansion outputs for reference selection. When
a channel is selected as the reference, the AEC processor compares the reference
channel signal to the current input channel.
Noise Cancellation Panel — Provides a checkbox to engage the noise canceller
6
(engaged by default) and text field to enter the amount of noise reduction in dB.
Bypass Button — Bypasses the AEC processor. When the button is red, bypass is
7
enabled.
OK Button — Confirms changes made to the contained parameters and closes the
8
dialog box.
AEC
Bypass Button
7
OK Button
8
Cancel Button
9
Show/Hide Advanced Options Button
¢
AEC Help Button
£
lights when signal activity is detected from the far end.
DMP 128 FlexPlus • DSP Configurator Software
lights when AEC is updating,
Update
Near
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