AR6201 - RT6201 - RCU6201 - AR6203
DV 14307.03 Issue 1 09/2013 Page 1-9
illumination curve (brightness to voltage relation) can be adjusted in
the installation setup.
LOW BATT Indication
The VHF transceiver monitors power supply voltage. If the supply voltage
drops below the adjustable threshold, the display indicates the message
“LOW BATT”. If the power supply voltage drops further, emergency
operation mode is entered.
Emergency Operation
If the power supply voltage drops below 10.25 V, the VHF transceiver
continues operation with degraded performance. In case the power supply
drops below 9.0V the unit is automatically switched off.
Built-in Tests PBIT and CBIT
After power-up, the unit performs a self-test (power-up built-in test /
PBIT). During PBIT the transceiver displays “WAIT” and the corresponding
software versions of both the control head and chassis module.
If faults are detected during PBIT, the error message “FAILURE press any
key” is displayed. If no faults are detected the transceiver
automatically activates the mode set before last power-off.
During normal operation a continuous built-in test (CBIT) permanently
verifies the correct operation of the unit. If a problem is detected
during CBIT, an error message will be displayed.
Installation Setup
Configuration of the installation parameters such as mike sensitivity,
mike type selection, speaker enable/disable plus other parameters are
available via the installation setup.
Service Mode
The service mode is a special configuration mode accessible via RS422
interface with a proprietary serial data communication protocol. This
mode is for use by authorized maintenance organizations during aircraft
service on ground only.
1.7 Technical Data
1.7.1 Power Supply Data
For 620X units the following data applies:
Nominal supply voltage range .... 11.0 … 30.3 V
extended supply voltage range ... 10.25 V … 32.2V
Emergency operation ............. 9.0 V to 10.25 V
Dimming control ................. 0…14 V or 0…28 V
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