Icom IC-M87 Instruction Manual page 25

Vhf marine transceiver
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D Dual/Tri-watch function "dt"
This item selects Dualwatch or Tri-watch as desired. See p.
14 for details.
PUSH
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) : The monitor function is activated by push-
ing and holding [SQL] for 1 sec. The squelch
opens while holding down the key.
• Ho (HOLD) : The monitor function is activated by pushing
and holding [SQL] for 1 sec. The squelch stays
open until any key is pushed.
PUSH
Monitor action PUSH
(default)
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
• The backlighting is automatically turned OFF after 5 sec. of inactivity.
Tri-watch function
D LCD contrast selection "LC"
The contrast of the LCD can be adjusted from 4 levels.
• 1 (bright)–4 (dark); 3 (default)
LCD contrast 3 (default)
Monitor action Hold
except for [PTT] is pushed.
PUSH
Automatic backlighting
(default)
PUSH
8
SET MODE
Automatic backlighting
OFF
LCD contrast 1
19

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