JA94-044 Dual Audio Controller
– AMS44 Compatible
Installation and Operating Manual
Rev A
Page 17
(1)
(2)
NAV1- COM4 Receive Select Switches and Legends
Each User has four white two-position centre-off toggle
switches for the NAV1/COM1 to NAV4/COM4
receivers/transceivers. When a left or right switch is set
to the 'up' position, audio from the receiver associated
with the legend above the switch is routed to the phones
of that side's user (and passengers if configured.) In the
'down' position, audio from the transceiver associated
with the legend below the switch is routed to the phones
of that side's user (and passengers if configured.)
The backlit legends are interchangeable to allow
customization. The default legends are NAV1, NAV2,
ADF and DME above the switches, and COM1, COM2,
FM1 and FM2 below the switches.
(3)
AUX and PA Receive Select Switches and Legends
The
AUX
/
PA
switches are two white two-position centre-off
toggle switches. The left-hand switch is associated with the Left
User, and the right-hand switch is for the Right User.
To select AUX, the appropriate switch is set to the 'up' position,
and for PA it is in the 'down' position. Audio from the associated
receiver is routed to the phones of that side’s user (and
passengers if configured).
The backlit legends are interchangeable to allow customization.
The default legends are AUX above the switches and PA below
the switches.
(4)
VOX Threshold Control
The VOX Threshold Control is an unlit rotary knob in the
centre top of the panel that is used to set the VOX
threshold level of the unit for all users and passengers.
When rotated fully clockwise (cw), the threshold will be
at maximum, VOX ICS operation is disabled and ICS
PTT input is required for ICS operation.
When rotated fully counterclockwise (ccw), the threshold
will be at minimum (almost live).
To adjust the unit for
VOX
(Voice activated) use, the
VOX control should be set fully ccw and then slowly
rotated cw to the point where no intercom audio can be
heard. The VOX control may require adjustment for
proper operation as ambient noise changes.
