Specifications

AA24/AA25 Series Single User Audio Controller
SM18 Installation and Operation Manual
April 14, 2012 Rev: 5.00 Page 3-2
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
3.3.2 Receiver/Transceiver Selection
The Receiver/Transceiver audio is selected from a double row of color-coded toggle switches. Receiver
switch bats are blue, and the transceiver switch bats are white. To connect the desired radio to the
headphones, the relevant switch is toggled upwards.
On the AA25, independent volume controls are provided for the transceivers and the first two NAV aids.
3.3.3 Volume Control
The Volume control is a dual concentric knob.
3.3.3.1 ICS Volume Control
The inner knob of the dual control is ICS VOL and controls the intercom volume for all headsets. An
internal trimpot sets the minimum level. With ICS VOL set fully ccw intercom volume will be at a
minimum. As the operator rotates the control cw, intercom volume will increase.
In multiple station systems, the ICS volume adjusts only the local ICS audio level.
3.3.3.2 RX Volume Control
The outer knob of the dual control is RX VOL and controls the RX volume for all selected radios. With RX
VOL fully ccw, volume will be at a minimum. As the operator rotates the control cw, volume will increase.
3.3.4 VOX Mode Control
The VOX Control selects the mode of operation of the intercom mic. When the control is in the centre of
its range, the intercom is in the VOX mode (voice activated). As the control is rotated counterclockwise,
the system becomes more sensitive, until in the fully counterclockwise position it is in LIVE mode (on
constantly). As the control is rotated clockwise, the sensitivity decreases, until at the fully clockwise
position it is in PTT mode (activated by cyclic or foot switch closure).
3.3.5 Audio Alerting Functions
The user receives audio alerting signals connected to the Direct Audio under all operating conditions of
the AA24/AA25.
End of Section 3.0