Northern Airborne Technology AMS43 - Manual (Page 21)

AMS43 Single Channel Audio Controller
SM59 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 functional and operational procedures for the
AMS43 Single
Channel Audio Controller.
3.2 General Information
The AMS43 provides control for all aircraft audio, allowing selection of transmit (TX) and receive (RX)
audio, LIVE, KEYED, or voice activated (VOX) intercom, interface for an additional hand held transmit
microphone (hand mic), and pilot isolation/emergency (PILOT ISO/EMR) operation.
Sidetone (S/T) level is adjustable internally, and RX and intercom (ICS) levels are adjustable on the front
panel. All audio, except the S/T of the radio in use and the directly connected DIRECT AUDIO 2 input signal
(see Section 3.5.1), is muted during TX for clarity. ICS operation allows TX during any ICS mode by using the
push-to-talk (PTT) switch.
3.3 Controls and Indicators
All TX and public address (PA) functions are controlled with a single rotary selector switch. RX audio,
ICS operations and tape audio are controlled with colour-coded toggle switches. RX volume, ICS volume
and ICS VOX squelch are individually adjusted with rotary controls.
3.3.1 Receive Audio Select Switches
Transceiver Receive
Audio Select Switches
NAV Aid
Audio Select Switches
Mode Switch Receive Volume Control
The transceiver RX audio select switches (white switch bats) are two-position switches. When set to the up
position, the respective transceiver RX audio is selected on. When set to the down position, the respective
transceiver RX audio is selected off.
The NAV RX audio select switches (blue switch bats) are three-position switches. When set to the up or
down position, the respective NAV RX audio is selected on. When set to the center off position, the
respective NAV RX audio is selected off.
ENG-FORM: 806-0111.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.