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NOTE: MECH and ATT lights go off automatically after
60 seconds if the call is not cancelled by the
RESET key.
PASSENGER ADDRESS
A key enables the selection of the Passenger Address
transmission.
This key must be pressed in during the whole
transmission.
An AMU pin program can inhibit the unstable operation
of the PA key.
TMUCOMI01-T01 LEVEL 1
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SELF EXAMINATION
What happens in case of a SELCAL call on VHF2?
A - CALL light flashes amber on the VHF2 key.
B - The three green bars on the VHF2 key
come on.
C - CALL light comes on white on the VHF2
key.
On the ACP, is it possible to transmit
simultaneously on Passenger Address and VHF
channels?
A - Yes.
B - No.
What is the function of the RESET key?
A - The RESET key is used to restart the
system.
B - The RESET key is used to cancel the
previous selections.
C - The RESET key is used to cancel all the
lighted calls.
TMUCOMI01 LEVEL 1
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THIS PAGE INTENTIONALLY LEFT BLANK
TMUCOMI01 LEVEL 1
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23 - COMMUNICATIONS
23-51-00 AUDIO SWITCHING
CONTENTS
CAPT 3 Position
NORM Position
F/O 3 Position
Self Examination
TMUCOMJ01 LEVEL 3
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AUDIO SWITCHING
The AUDIO SWITCHING selector is used in case of
communication failure on captain or first officer
channels.
CAPT 3 POSITION
In this position, the captain will use the 3rd occupant
ACP.
The 3rd occupant Audio equipment cannot be used.
Note : the message "AUDIO 3 XFRD" is displayed in green
on the ECAM MEMO display
NORM POSITION
This position corresponds to the normal allocation of
the ACPs.
F/O 3 POSITION
In this selector position, the first officer is
switched on the 3rd occupant ACP.
The first officer uses the 3rd occupant ACP.
The 3rd occupant Audio equipement cannot be used.
Note : the message "AUDIO 3 XFRD" is displayed in green
on the ECAM MEMO display.
TMUCOMJ01-T01 LEVEL 3
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AUDIO SWITCHING
TMUCOMJ01-P01 LEVEL 3
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AUDIO SWITCHING
SELF EXAMINATION
What happens when CAPT3 position is selected ?
A - The captain uses the 3rd occupant audio
equipment.
B - The 3rd occupant uses the captain audio
equipment.
C - The captain uses the 3rd occupant ACP.
TMUCOMJ01 LEVEL 3
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23 - COMMUNICATIONS
23-51-00 AUDIO MANAGEMENT UNIT INTERFACES
CONTENTS
ACP-AMU Link
AMU Layout
Volume Control
Self Examination
TMUCOMK03 LEVEL 3
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AUDIO MANAGEMENT UNIT INTERFACES
ACP-AMU LINK
Three to five identical ACPs can be installed.
They are linked by an ARINC 429 bus to the corresponding
audio cards fitted in the Audio Management Unit.
ACP-AMU link is done by ARINC 429 buses.
Only digital data are exchanged between the AMU and
the ACPs.
There are no audio signals inside the ACPs.
AMU LAYOUT
Various functions such as switching, filtering and
amplification are performed inside the AMU.
　
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