TM 5-1940-322-10
0039 00
OPERATION OF SPECIAL PURPOSE KITS (Contd)
DEPTH SOUNDER OPERATION (Contd)
Backlighting
The Backlighting illuminates the display and the keys, with five levels of brightness.
1. Press the LIGHT key switch to illuminate the backlighting on the display and
the large digits will show the current lighting level.
NOTE
Four icons will be shown on the bottom line of the display,
corresponding to the four keys (x, -, + and ✓).
2. Press the (+) (DEEP) key to increase the brightness (max 5), (-) (SHALL) to
decrease it (min 1), (3) (INFO) to accept the selected brightness or (x) (LIGHT)
to turn the backlighting off.
NOTE
The currently selected lighting level will be applied if no
key is pressed after five seconds.
While the backlighting is on, the lamp icon ( ) will be
shown on the bottom left of the display. The backlighting
can either be Local or Network controlled, refer to Local
& Network Backlighting within this work package.
0039 00-7
