JA94-001A Dual Audio Controller
Installation and Operating Manual
Rev
B
Page 20
3.3.6
ICS Isolation Operation
Note
: It is important to be aware of the ICS Isolation configuration of the aircraft.
When the external control signal ICS ISOLATE is active: the LEFT or RIGHT User, as configured by ProCS™, are
isolated from the ICS signal of the passengers and the other User; when configured as both the LEFT and RIGHT
user, the LEFT and RIGHT Users will be connected to each other via an ICS but are isolated from the Passengers
ICS.
In Isolate Mode, the selected user's MIC audio input is disconnected from the ICS TIE output, the user's phones are
disconnected from the ICS TIE input circuit, and the music to the user’s PHN output will be muted.
3.3.7
Direct Audio Operation
DIRECT AUDIO 1 and, when configured by ProCS™, the DIRECT AUDIO 2 & 3, are routed to the LEFT USER
Phones.
DIRECT AUDIO 2 and, when configured by ProCS™, the DIRECT AUDIO 1 & 3 are routed to the RIGHT USER
Phones.
3.3.8
Music Operation
Music to the phones will be muted by incoming audio (ICS, Receive, or Direct Audio) or if the unit is transmitting.
When the incoming audio has ended, the music will gradually return to the previous level.
3.3.9
Rear Hand Mic Operation
When configured by ProCS™, the Rear Hand MIC audio and PTT signal are connected to the Transceiver as
selected by the left or right TX Select switch. The Rear Hand MIC is assigned to left or right user's controls by
ProCS™ in the Passenger and Rear Hand MIC settings.
3.3.10
Cockpit Voice Recorder (CVR) Operation
The RIGHT CVR output consists of the sum of the RIGHT USER MIC input (independent from VOX control setting)
and the RIGHT USER PHONE output, and the LEFT CVR output is the sum of the LEFT USER MIC input
(independent from VOX control setting) and the LEFT USER PHONE output.
3.3.11
Remote RMT Operation
A remote transmit selector may be linked to the JA94-001A to allow remote selection for transmission via the right
user controls. (This remote selector could be on the right user's cyclic control.) When a remote transmit selector is
installed and the RIGHT USER TX SELECT switch is in the RMT position, then the RIGHT USER will transmit on the
radio or radios as selected by the remote transmit selector.
Note
: It is important to be aware of the Remote Operation configuration of the aircraft.
