PRIMUS
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1000 Integrated Avionics System
A28--1146--112--00
C--33
PRIMUS
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II Radio System
AUDIO PANEL OPERATION
General
Two audio panels (figure C--15) are mounted on the aircraft instrument
panel, outboard of the electronic display units. A third audio panel is
mounted at the observers station.
MASK
Audio Panel
Figure C--15
Controls
The audio panel receives digitized audio from remote radio units,
decodes the audio, controls the gain (volume) and routing of the various
channels, filters audio signals, and outputs the audio to various
speakers and headphones. It controls microphone inputs to various
radios, interphone, and passenger address systems. Amplifiers are
included for driving headphones and speakers.
The audio panel also has inputs for intercom, crew annunciation, crew
communication, hot microphone, etc., and full time emergency warning
inputs from aircraft systems.
Refer to figure C--15 for the locations of the following controls.
