Extron electronics XMP 240 C AT User Manual page 35

Reference Selection Drop-Down Menu — (See
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Provides all inputs, outputs, and virtual returns 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
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(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
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enabled.
OK Button — Confirms changes made to the contained parameters and closes the
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dialog box.
AEC
Cancel Button — Reverts any changes made to the contained parameters back to
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their states when the current instance of the
dialog box.
Show/Hide Advanced Options Button — Shows or hides the advanced
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configuration options for the AEC processor (AEC Advanced Options below).
AEC Help Button — Opens the
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DSP Configurator Help file for further assistance in operating AEC processor.
AEC Advanced Options
The dialog box provides advanced NLP (non-linear processing) options for fine tuning
AEC
echo cancellation. These options are hidden by default. Click the
button to access them (see
Options
Figure 45. AEC Advanced Options
Enable NLP Checkbox — Checked by default, NLP (non-linear processing) is required
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to completely remove echo.
NLP Presets — Offers three preset options for NLP parameters.
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Soft — Applies soft preset values to the NLP reduction parameters for light echo
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cancellation.
Normal (default) — Applies normal preset values to the NLP reduction parameters
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for the widest array of echo cancellation needs.
• Aggressive — Applies aggressive preset values to the NLP reduction parameters
for aggressive echo cancellation.
NLP Reduction Parameters — Provides text boxes for
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figure 44
dialog box was opened and closes the
AEC
Acoustic Echo Cancellation
figure 44, on the previous page).
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Enable NLP Checkbox
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NLP Presets
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NLP Reduction Parameters
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Double Talk Echo Reduction
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Comfort Noise
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Max NLP Reduction
XMP 240 C AT • DSP Configurator Software
on the previous page)
topic of the
Show/Hide Advanced
,
Attack
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