Operation; Safety Instructions; Controls And Indicators - Becker AR6201 Series Installation And Operation Manual

Section 3

OPERATION

Note: In this section the display content is mainly shown for transceiver working in 8.33+25
kHz mixed Mode. Dedicated pictures for 25 kHz Mode are not explicitly shown,
because the display content is very similar (They differ only in number of digits for
frequency. Refer chapter 3.4).
3.1

Safety Instructions

The following instructions must be followed for safe operation of the VHF transceiver:
Switch OFF the unit before starting or shutting down engines.
A speech test is to be performed before startup and it should be noted that if the speech test is
carried out close to the ground station the results may be positive even if the antenna cable is
broken or short-circuited. In this case at a distance of 5 to 10 km communication might not be
possible.
Use a loud voice for speech communication and hold the microphone close to the lips. Otherwise
cabin noise can be intrusive and make understanding difficult.
Use only microphones or headsets which are suitable for use in aircraft. In aircraft made of wood or
synthetic materials or in gliders or helicopters, incoming radiation can affect the integrated amplifier
of the microphone (feedback). This is noticeable in the ground station by whistling and/or heavy
distortion. The described disturbances can occur in different ways on the different transmission
frequencies.
For power supply voltages below 10 V the speaker output of the transceiver is automatically
switched off, without dedicated notification of the user!
For power supply voltages below 10V pilots have to use the headphone output.
Depending on settings of installation setup "LOW BATT" may be indicated if supply voltage drops
below predefined threshold.
If this threshold is adjusted in range 10.2 ... 10.5 V this "LOW BATT" warning may be used as an
indication, that pilot should connect his headset, because speaker may be switched off soon.
3.2

Controls and Indicators

DV 14300.03/.04 Issue 4 5/2011
AR6201
Figure 3-1 controls and indicators
Page 3-1