Northern Airborne Technology AA38-5xx - Manual (Page 43)

AA38-5xx, -6xx, -7xx and -8xx Series Local ICS Loop
SM54 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 4 Page 3-1
ENG-FORM: 806-0111.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 3 Operation
3.1 Introduction
Information in this section consists of functional and operational procedures for the AA38-5xx, -6xx, -7xx
and -8xx Series Local ICS Loop.
3.2 General Information
The AA38-5xx, -6xx, -7xx and -8xx Series Local ICS Loops provide intercom functions for four or eight
users with operation in HOT MIC or VOX mode. A switch-selectable NAT or Andrea tie line (except for
7xx and 8xx which is NAT Super tie line) allows connection to multi-unit systems and an Auxiliary (AUX)
input allows radio or music to be connected to the AA38.
During installation, or if the unit has been exchanged, it may be a requirement to change internal
adjustments. This should be done only by qualified personnel.
3.3 Controls and Indicators
3.3.1 AA38-5xx and AA38-6xx
The AA38-5xx and -6xx Series Local ICS Loops have no operator accessible controls.
3.3.2 Master ICS Volume Control (AA38-7xx and AA38-8xx)
The ICS volume is controlled by a remote-mounted, spring-loaded, centre-off toggle switch (installer
supplied). The increase/decrease is made in 32 discrete steps, by activating and releasing the switch
control or by holding the switch control in the desired direction. When the switch is held in either
direction, the change will be slow initially, but after one second the control enters ‘fast’ mode. The ICS
volume will stop at its maximum or minimum value without ‘wrapping around’. After a volume adjustment
is made, the value is stored in non-volatile memory.
Section 3 ends