AR6201 - RT6201 - RCU6201 - AR6203
DV 14307.03 Issue 1 7/2013 Page 3-1
Section 3 OPERATION
Note 1: In this section the figures for illustrating display content mainly
show transceivers working in 8.33 + 25 kHz mixed mode. Dedicated
pictures for 25 kHz mode are not explicitly shown, as the display
content is very similar (They differ only in number of digits for
frequency).
Note 2: The HMI actions described in this section can be performed on
primary controller or on optional secondary RCU6201 controller.
Note 3: The following graphics of the AR6201-(XXX) display content show the
8.33 kHz channel spacing for all possible operation modes.
3.1 Safety Instructions
This chapter contains general operating instructions for the AR6201-XXX to
ensure safe operation of the VHF transceiver.
Switch OFF the unit before starting or shutting down engines.
To minimize background noise, to ensure a crystal-clear reception by the
receiving station and to improve reception quality ensure the microphone is
close to the lips and speak in a clear loud voice.
Before startup a speech test is to be performed. 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 a short-circuit exists. In this case at a
distance of 5 to 10 km communication might not be possible.
Use only microphones or headsets which are suitable for use in aircraft. It
is highly recommended to use the same type microphones or headsets, which are
suitable for use in aircrafts. In aircraft made of wood or synthetic
materials, 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.
If the power supply voltage drops below the “Low Battery Threshold” (default
value is 10.5 V), the “LOW BATTERY” message will appear each 3 seconds in the
lower part of the display.
IF the power supply voltage drops below 10 V the system enters power saving
mode:
• speaker output of the transceiver is automatically switched “OFF”
• the speaker sign will no longer be presented on LCD display
• the pilot must use headphones to continue listening.
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