Icom IC-M87 Instruction Manual page 24

8
SET MODE
D Dual/Tri-watch function "dt"
This item selects dual or tri-watch as desired. See p. 14 for
details.
Dualwatch function
(default)
D Monitor switch action "Sq"
The monitor switch action cuts off the squelch function tem-
porarily. This switch action contains PUSH (Pu) or HOLD (Ho)
settings as shown below.
• Pu (PUSH): After pushing the [SQL] for 1 sec., the squelch opens
and emits audio while pushing and holding [SQL]. (default)
• Ho (HOLD): After pushing the [SQL] for 1 sec., the squelch opens
and emits audio even [SQL] is released. To close the squelch, push
any key.
Monitor action PUSH
(default)
19
PUSH
Tri-watch function
PUSH
Monitor action Hold
D Automatic backlighting "bL"
This function is convenient for nighttime operation. The au-
tomatic backlighting can be adjusted from OFF, 1 (dark)–3
(bright); 3 (default). Select 1–3 to turn this function ON.
• The automatic backlighting turns the backlighting ON when any key
except for [PTT] is pushed.
• The backlighting is automatically turned OFF after 5 sec. of inactivity.
PUSH
Automatic backlighting
(default)
D LCD contrast selection "LC"
The contrast of the LCD can be adjusted from 4 levels.
• 1 (bright)–4 (dark); 3 (default)
PUSH
LCD contrast 3 (default)
Automatic backlighting
OFF
LCD contrast 1