Extron electronics DMP 128 Plus - Page 38

DMP 128 Plus • DSP Configurator Software 30
1
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.
2
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.
3
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.
4
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.
5
Reference Selection Drop-Down Menu — Provides all mic/line inputs, Aux inputs,
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.
6
Noise Cancellation Panel — Provides a checkbox to engage the noise canceller
(engaged by default) and text field to enter the amount of noise reduction in dB.
7
Bypass Button — Bypasses the AEC processor. When the button is red, bypass is
enabled.
8
OK Button — Confirms changes made to the contained parameters and closes the
AEC dialog box.
9
Cancel Button — Reverts any changes made to the contained parameters back to
their states when the current instance of the AEC dialog box was opened and closes the
dialog box.
¢
Show/Hide Advanced Options Button — Shows or hides the advanced
configuration options for the AEC processor (see AEC Advanced Options on the next
page).
£
AEC Help Button — Opens the Acoustic Echo Cancellation topic of the
DSPConfiguratorHelp file for further assistance in operating AEC processor.