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AA12 Compact Audio Controller Manual SM21 Rev. 4.10

Page 3-2 Sep 9, 2004

ENG-FORM: 806-0106.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

3.3.2 Receive Audio – AA12-002/AA12T-002

The AA12-002 is typically configured to select the receive (RX) audio from three

transceivers. The RX select switches are two-position toggle switches.

Transceiver audio can be selected by setting the applicable RX select switch to the up

position, and deselected (turned off) by setting the applicable RX select switch to the

down position. It can also be selected as a function of the transmit (TX) select switch.

The transceiver that is selected by the TX select switch is automatically selected for

receive as well.

An additional Direct Audio input (unswitched) is provided for airframe warning, rad alt, or

other high priority audio signal.

3.3.3 Transmit Selection

The rotary TX select switch provides radio selection for up to three transceivers (1, 2, 3)

and a PA. The AA12 is activated for TX operation by selecting the desired transceiver

on the rotary TX select switch and pressing the external TX PTT switch. This connects

the active MIC to the selected transceiver. The front panel annunciator illuminates

green to indicate TX operation.

RX Select Switches

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AEM AA80 InterVOX Specifiche Pagina 38