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View showing components side of audio module
Fig. 2-1 Jumpers location for charging the microphone input from dynamic to standard microphone
2.4.3 Speaker/headphones connection
The audio output of the transceiver is compatible with a 4Ω speaker or headphone with an impedance
of 300Ω - 600Ω or both in parallel without having to switch the transceiver over.
CAUTION
The magnetic field of the speaker will affect the compass, therefore, minimum spacing
between speaker and compass must be 1.3 m when selecting speaker location.
2.4.4 IC connection
The IC connection is provided for aircraft with high ambient noise and requires use of the headset
together with an IC switch in the unit connector for the additioning wiring (see aircraft wiring Fig. 2-4).
The normal communications position is the OFF position of the IC-switch, i.e. in the ON position
communications operation is the same as before, however, with intercommunication between the two
crew members without having to press the (PTT) button.
2.4.5 Panel lighting
The transceiver features a panel lighting circuit which must be connected to the + 14 V supply voltage
by connection P 4101/7 or to a dimmer control. It is good practice to provide the lighting externally via
a separate lighting switch to save current in aircraft having no power system, e.g. gliders.
CAUTION
The lighting is not switched off on operation of the ON/OFF switch.
Dyn. Mike
Standard Mike
AR 3201 - ( )
DV 28110.03/.04 Issue 04/92 Page 2-3