Table of Contents
Advertisement
3.4.2
Input Function Selection
The Input Function switch is a two-position, locking switch on the front of the AA21-400 that is used to
select between PA and Radio operation. When PA is selected, RADIO is disabled, and vice versa. It is
good practice to set this switch to PA when operating the siren to avoid mixing incoming radio/CD audio
with the siren audio output.
3.4.2.1
PA Operation
For external PA/Siren systems or internal paging functions, set the function switch on the AA21-400 to PA.
Key the microphone through the cyclic or hand mic switch, and speak in a firm, clear manner.
3.4.2.2
Radio Operation
To set the system for radio rebroadcast functions, set the function switch on the AA21-400 to RADIO. All
audio delivered from the source (typically pilot's or copilot's headset) will be broadcast from the PA system
or internal speaker.
3.4.3
Volume Control
The volume control knob (VOL) on the front of the AA21-400 is used to adjust the level of the selected
output. Rotating the knob clockwise will increase the volume, and counter-clockwise will decrease it. For
external paging and rebroadcast operations, the volume should always be set between half and full level.
The setting for internal paging must be determined by experiment to provide the desired coverage in the
passenger area and to prevent feedback.
Build Standard: 5.00
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA21-400 Cabin PA System
SM34 Installation and Operation Manual
Input Function Switch
Volume Control
Nov 09, 2016
Page 3-2
Advertisement
Table of Contents
