Northern Airborne Technology AA9x - Manual (Page 49)

AA9x Series Single Channel Audio Controller
SM56 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 4 Page 3-6
ENG-FORM: 806-0111.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
3.6 Audio Alerting Functions (AA95 and AA97 models only)
Two types of audio alerting are supported, Direct Audio and Internal Alerting. The use of these alerting
features should be determined, defined and recorded so that the operator has an opportunity to use these
features as they were intended for their specific installation.
3.6.1 Direct Audio
Direct Audio is when an audio signal from an existing warning system is connected ‘directly’ into the audio
system and is not front panel selectable. There are usually two Direct Audio inputs on the AA95 and
AA97. Typically, Direct Audio 1 is an amplified/adjustable input and Direct Audio 2 input connects directly
to the pilot's headset output.
3.6.2 Internal Alerting
Internal Alerting is provided by up to three separate, internal tone generators that are coupled to the
headset output. These tones are a function of the AA95 or AA97 itself and can be used to supplement
existing warning tones (Low Rotor, Engine Out warnings in a Bell 206) or provide unique alerting
capability for functions such as ICS Call, Rad Alt DH warning, etc. The internal alerts are configuration
specific and how they will be used is determined at the time of installation. The Internal alerts are not front
panel selectable.
Section 3 ends