Northern Airborne Technology AMS50 - Manual (Page 48)

AMS50-000 Stereo Audio Panel with Marker Manual SM50 Rev. 4.00
3.2.1.1
Transmit Functions
The TRANSMIT functions are controlled from two transmitter select rocker push-buttons
(PLT MIC and CPLT MIC). Each rocker has the capability to select only one transmitter
at a time, i.e. 1 (COM 1), 2 (COM 2), 3 (COM 3), or PA. The relevant green LED above
the switch will illuminate to indicate the selected transmitter. Pressing the right (►) side
of the button will select the option one place to the right of the current selection, and
pressing the left (◄) side will move the selection one place to the left. The selection
options will wrap around – i.e. one step to the right from the PA option will select COM 1,
and one step to the left of COM 1 will move the selection to PA. The Receive audio from
the selected COM is automatically present. See also section 3
. 2.1.3 – SPLIT Button.
3.2.1.2 PA Function
The PA position provides a mic and PTT output selection to an external amplifier for use
as either a loudhailer or Passenger Address system.
3.2.1.3 SPLIT Button
The SPLIT function button separates or combines the control of the TX selection buttons.
When the SPLIT function is active, the LED above the switch will illuminate green, and
each transmit select button will operate independent of the other to allow different radios
to be selected simultaneously. When the SPLIT function is not active, the LED will remain
dark, and operation of either of the two Transmit select buttons will move the Pilot’s and
Co-pilot’s selection simultaneously. When the SPLIT function is changed from ‘active’ to
‘inactive’, the Co-pilot’s current selection will change to match the Pilot’s. The LEDs
above the COM Receiver Audio push-buttons do not illuminate unless they are
specifically selected. Each Pilot will only hear the audio from the transmitter they have
selected unless any COM Receive Audio push-button is also engaged. Pilot selection of
the transmitters can also be made via an optional remote mounted momentary switch.
3.2.2 Receive Functions
The three COM receiver audio push-buttons (COM1, COM2 and COM3), and five NAV
receiver audio push-buttons (MKR, NAV1, NAV2, DME and AUX) are used for monitoring
COM or NAV radio audio.
When a push-button is selected, the green LED above it will illuminate to indicate that the
input is ‘on’. Both Pilots hear all selected audio, except in PLT ISO mode (see section
3.2.3.2). Passengers hear all selected audio in ALL mode only (see section 3.2.3.3).
Note: When a transmitter is selected (see section 3.2.1.1) the Receive audio from the
selected COM is automatically present.
Page 3-2 Nov 12, 2003
ENG-FORM: 806-0104.DOT
Amendment # 2 Mar 20, 2006
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.