Northern Airborne Technology AA20 - Manual (Page 28)

AA20 Series PA/Siren System
SM33-1 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 4 Page 3-2
ENG-FORM: 806-0111.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
3.3.2.1 AA20-030
On the AA20-030, the function switch selects between PA and Radio Operation.
PA Operation
For external PA/Siren systems or internal paging functions, set the function switch on the AA20-030 to
PA. Key the microphone through the cyclic or hand mic switch and speak in a firm, clear manner.
Radio Operation
To set the system for radio rebroadcast functions, set the function switch on the AA20-030 to RADIO. All
audio delivered from the source (typically pilot’s or copilot’s headset) will be broadcast from the PA
system.
3.3.2.2 AA20-050
On the AA20-050 and AA20-050H, the function switch selects between Internal and External P/A. The
siren is disabled when the function switch is set to Internal.
Internal PA Operation
For internal PA/Siren systems or paging functions, set the function switch on the AA20-050 to INT. Key
the microphone through the cyclic or hand mic switch and speak in a firm, clear manner.
External PA Operation
For external PA/Siren systems or paging functions, set the function switch on the AA20-050 to EXT. Key
the microphone through the cyclic or hand mic switch and speak in a firm, clear manner.
3.3.2.3 AA20-430
On the AA20-430, the function switch selects between PA and Tape Operation.
PA Operation
For internal paging functions, set the function switch on the AA20-430 to PA. Key the microphone through
the cyclic or hand mic switch and speak in a firm, clear manner.
Tape Operation
To set the system for tape functions, set the function switch on the AA20-430 to TAPE. All audio delivered
from the source will be broadcast from the PA system.