Extron electronics DMP 128 Plus User Manual page 38

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
Cancel Button — Reverts any changes made to the contained parameters back to
9
their states when the current instance of the
dialog box.
Show/Hide Advanced Options Button — Shows or hides the advanced
¢
configuration options for the AEC processor (see
page).
AEC Help Button — Opens the
£
DSP Configurator Help file for further assistance in operating AEC processor.
lights when signal activity is detected from the far end.
dialog box was opened and closes the
AEC
AEC Advanced Options
Acoustic Echo Cancellation
DMP 128 Plus • DSP Configurator Software
lights when AEC is updating,
Update
on the next
topic of the
Near
30