Northern Airborne Technology AMS42 - Manual (Page 58)

AMS42/44 Dual Channel Audio Controller Manual SM19 Rev. 4.00
Page 3-4 Nov 21, 2003
ENG-FORM: 806-0102.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
3.4.3 Volume Controls
The controller features individual master RX and ICS VOL controls on both the left and
right sides of the unit, which can be adjusted to suit the specific user's requirements.
3.4.3.1
RX Volume Control
The RX knobs are the smaller, topmost controls of the dual concentric volume control
assemblies. The RX VOL controls provide adjustment of the RX audio selected by the
controller. As in any audio system, it is important to set the individual radio volume
controls to a nominal level that is acceptable to both pilots, then adjust the respective
master RX VOL on the audio controller to suit user preference. The RX VOL controls
are designd to provide a minimum level, even when set fully ccw.
All receive audio is muted during transmit (NORM and ISO mode).
3.4.3.2
ICS Volume Control
The ICS VOL knobs are the larger, bottom controls of the dual concentric volume
control assemblies. The ICS VOL controls provide adjustment of the ICS audio
selected by the controller. The ICS volume controls provide adjustment from 0 to full
output. See also section 3.5.
3.4.4 Passenger Receive Audio Selection
The passengers normally hear the radio audio as selected on the left side of the
controller. The passengers can be shifted to the right side by changing the setting of the
internal PAX switch, accessible through the right side of the controller. The passengers
will not hear any radio audio when the red mode switch is in the EMER position.
3.4.5 Auxiliary Inputs
Two Direct Audio inputs are available. They are coupled directly to either the left or right
side of the controller at the time of installation. The Direct Audio inputs are normally
selected for the right side of the controller when the unit is shipped from the factory.
3.5 AMS42 - Intercom Functions
All ICS audio is controlled by the front panel ICS volume controls and may be varied to
suit conditions. There are independent volume controls for the left and right sides of the
controller. The ICS VOL are the larger, aft controls of the dual concentric volume
control assemblies. See section 3.4.3.2.
If the controller is operated in the emergency mode, ICS operation will continue (if there
is no fault condition) between the passengers, but not between the pilot and copilot or
passengers.