12
13
C5 To control the ambient sound volume
The ambient sound mode can be changed with the change-mode button (Fig 15).
u
Ambient sound on "ON" (by default mode) – in this mode, the ambient (surrounding) sound
is introduced in the earjack allowing to hear people not connected to the intercom system,
the engine (e.g. during landing phase) or alarms without removing the earshells from the
ears. Intercom is still working and can be adjusted with + - buttons (Fig 15).
u
Ambient sound on "OFF" – in this mode, the ambient sound is completely damped. Intercom
is still working and can be adjusted with + - buttons (Fig 15).
u
A short press (<2 sec) on change-mode button (Fig 15) allows to switch ambient sound
on "OFF" and "ON".
u
A long press (>2 sec) on change-mode button (Fig 15) allows to enter in the «ambient
sound volume control» mode (a three tone beep indicates the changing mode). In this
mode, the user can adjust the ambient sound level with b - (Fig 15) .
u
Ambient sound levels can be adjusted 4 levels up and 7 levels down from the default position.
u
3 beeps signal indicates when the maximum or minimum level is reached.
u
After 3 sec of inactivity (no button touched), the mode returns automatically back to
standard mode (a three tone beep indicates the changing mode).
C Control
Box
C Control
Box
Fig16
System OFF
Long press
(>2sec)
Long press
(>2sec)
Automatic after 3 sec
of inactivity
Power button
in position ”0”
Intercom without
volume control
Short press
(<2sec)
Short press
(<2sec)
Power button in position ”I”
Ambient sound
volume control
Ambient sound
”ON”
Ambient sound
”OFF”
+/- intercom
volume control
+/- ambient sound
volume control
+ - buttons
change mode button
Fig 15
By default, the ambient sound mode is on "ON"
12
dB
(max)
9
dB
6
dB
3
dB
0
(default)
-3
dB
-6
dB
-9
dB
-12
dB
-15
dB
-18
dB
-21
dB (min)
Ambient sound Volume Scale
