Northern Airborne Technology AA35 - Manual (Page 17)

AA35-001 Audio Mixer Panel
SM25 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 4 Page 3-1
Section 3 Operation
3.1 Introduction
Information in this section consists of the functional and operational procedures for the AA35-001 Audio
Mixer Panel.
3.2 General Information
The AA35-001 Audio Mixer Panel is a six channel summing amplifier with independent level control for
each input. It can be used as an expansion panel for existing audio controllers.
The AA35-001 Audio Mixer Panel provides six independent channels with differential inputs and balanced
outputs for high common mode noise rejection. Also provided is a composite output. Each channel is
individually adjustable with a 40 dB range. The input audio level is internally selectable by DIP switch to
2.5 or 7 Vrms. Output impedance of each channel is individually selectable via internal jumpers to allow
the connection of an 8 or 600
Ω load.
3.3 Controls and Indicators
3.3.1 Channel Controls
The AA35-001 has six front panel rotary controls. Each one controls the volume level of an independent
channel. With the control fully counterclockwise it is in the OFF detent position and no audio will be heard
on the headset for that channel. Rotating the control clockwise past the detent will turn the channel on.
The volume will increase as the control is rotated clockwise and decrease as it is rotated
counterclockwise.
WARNING:
High volume settings can cause hearing damage.
Set the headset volume control to the minimum volume setting, and
slowly increase the headset volume to a comfortable listening level.
Section 3 ends
ENG-FORM: 806-0112.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.