C. Speaker connection
A 4 to 8 Ohm speaker can be connected to audio output P1- 1AF-asym.
CAUTION : The magnetic field of a speaker influences the magnetic compass.
When choosing the mounting point, a minimum distance of 1.3 m
must be maintained between the speaker and the magnetic com-
pass.
D. Headphone connection
Up to two headphones with an impedance of 600 Ohm can be connected to
the audio output P1 - 2,3 AF-HI/LO.
E. Intercom mode "IC connection".
The intercom mode is designed for aircraft with a high noise level and assu-
mes operation using headsets. Additional wiring on the equipment connector
with an IC switch is necessary (refer to Fig. 2-4 - 2-6).
The normal R/T communication takes place with the IC switch in the OFF po-
sition. When the IC switch is set to ON, R/T communication can be carried
on as before but intercommunication is also possible between two crew mem-
bers. The IC is switched off during transmission.
F. Panel lighting
The VHF transceiver is fitted with panel lighting. It is to be connected to
the aircraft external power supply via the aircraft wiring at terminal
P1 23(+)/10(-) or to a dimmer control (refer to the following illustration). For
aircraft without an external power supply, the lighting power should be supp-
lied via a separate lighting switch to save power.
CAUTION : The lighting is not switched off when the unit is switched off
(ON/OFF switch).
Fig. 2-1 Interwiring panel lighting
INSTALLATION AND OPERATION
AR 4201 - ( )
Page 2-3
23-10-01 December 15/95
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