Northern Airborne Technology AMS42 - Manual (Page 62)

AMS42/44 Dual Channel Audio Controller Manual SM19 Rev. 4.00
Page 3-8 Nov 21, 2003
ENG-FORM: 806-0102.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
3.9 AMS44 - Selection of Transmit Functions
Left User (Co-pilot)
Transmit Selector Transmit
Annunciator
Right User (Pilot)
Transmit Selector
Transmit
Annunciator
3.9.1 Transmit
Selectors
The transmit selector controls are six position rotary switches, one on each side of the
panel to correspond to the user on that side of the aircraft. The controls select the
transmit function required by the relevant user. Each rotary selector switch is
completely independent of the other, and the pilot and copilot have equal priority during
transmit. When the PTT is activated, all audio selected on the side of the controller that
is transmitting is muted, except the sidetone of the transceiver in use.
3.9.1.1 Automatic Receive Audio
Receive audio is automatically selected as a function of the respective rotary selector
switch. No additional switching is needed to establish external communication.
3.9.1.2 Transmit Annunciator
During transmit from either the pilot or copilot position, the appropriate TX annunciator
(green) will light on the front panel.
3.9.1.3 TX Selector Example
In the figure that follows, the positions of the rotary selector switches indicate that the left
and right sides of the controller are set for transmit operation on the AUX FM transceiver.
Both Transmit Selectors at AUX FM