Biamp LTR - Manual (Page 111)

Component Objects
Device IO indicates which hardware input is associated with that software channel. Gain In
compensates for different input levels (mic or line), and should be set so Peak In flashes only
occasionally (6dB headroom). Phan Pwr assigns +48 Volt phantom power to the input for
condenser microphones. Mute In turns the input signal on/off. Level (dB) In adjusts the relative
input volume. Invert In reverses the polarity of the input signal. AEC turns on/off acoustic echo
cancellation. Adv opens an Advanced dialog. Noise Reduction In selects the amount of
background noise reduction to be applied (6~15dB).
Each channel of AEC has an Advanced dialog box. ERL (Echo Return Loss) shows the level
difference between a signal at the speaker output (AEC Ref) and that same signal as picked up at
the mic (AEC Input). ERLE (Echo Return Loss Enhancement) indicates the amount of processing
being applied on that channel. TER (Total Echo Reduction) shows the combined echo reduction
achieved by acoustic damping (ERL) and signal processing (ERLE). Nonlinear Processing
provides additional echo cancellation, for more challenging applications. However, increased
Nonlinear Processing can also adversely affect full-duplex operation. Ref, Mic, and Out display
levels at the AEC Ref block and at the AEC block (pre & post AEC respectively). Echo Detect
indicates AEC in progress. Echo Path Changed indicates AEC converging. Min Threshold
prevents AEC re-convergence due to momentarily low levels (such as muted mics).
Right-clicking over certain settings will provide a menu of additional options.
Each NEXIA TC comes pre-configured from the factory with a default system design . If you wish
to load your own custom designed configuration you will need to reset/initialize the unit(s) first.
TC - AEC Ref 8 Channel
97