User's Manual Part 1

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Backlight Timeout
Allows the backlight timeout time to be set so the backlight stays on for a short time
from the last key press, for a long time from the last key press or so that the
backlight is permanently on or off.
Note:- Having the backlight off reduces the transceiver’s power consumption.
Use the Scroll keys to select the required setting (example
“Always on”):-
When the setting required is displayed press the key