Operation
Becker Avionics
Start-Up
46
RCU6512
DV17551.03 Issue 03 June 2020
3.2.6.1 Symbols on the Display
Symbol
Function
TX
The transceiver is in transmit operation.
SQL
Squelch function is active, weak RX signals will be suppressed.
STO
The transceiver is in a storage procedure.
128.2
25
Inverted figures or letters on the display are selected to change.
CH
An already used channel is shown in uppercase letters.
ch
A free channel is shown in lowercase letters.
3.3 Start-Up
Excessive pulses on the DC bus of the aircraft may cause damage on electrical
circuits of any installed instrument.
Do not turn on the device during engine start or shutdown.
•
Turn on the device by turning the volume knob clockwise.
•
After power-on, the device starts a self-test (PBIT).
o
The display shows the message "WAIT".
•
If there is an error the display shows the message "FAILURE (for details see "Warning
and Failure Indications" page 57).
•
During normal operation, a self-test (CBIT) permanently examine the correct operation of
the device.
o
If there is an error the display shows an error message.
