Northern Airborne Technology AMS43 - Manual (Page 22)

AMS43 Single Channel Audio Controller
SM59 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 4 Page 3-2
The master RX volume control (RX VOL) adjusts all RX audio concurrently from 1% to full. It is important
to set the individual radio volume controls to a nominal level, and then use the master RX VOL control on
the audio controller to adjust for changing flight conditions.
When the red mode switch is set to NORMAL, the passengers will hear the radio audio as selected on
the controller. The passengers will not hear any radio audio when the red mode switch is in the ISO/EMR
position.
3.3.2 Transmit Selector Switch
TX Indicator Transmit Selector Switch
The TX selector switch is a six-position switch used to select the desired transceiver. When rotated fully
clockwise, this switch selects the PA function. When the hand mic or TX PTT switch is activated, the mic
will be coupled to the radio (or PA) selected. The pilot has priority over the copilot during TX operations.
RX audio for the transceiver selected is automatically activated as a function of the rotary selector switch,
and no additional switching is needed to establish outside communication. During TX, all audio selected
is muted except the sidetone of the transceiver in use.
The front panel TX indicator will illuminate green when either the pilot or co-pilot transmits. It will not light
when the hand mic is used.
ENG-FORM: 806-0111.DOT
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