Adjusting The Squelch Level; Automatic Backlighting; Voice Scrambler Operation (Available For I/S Version Only) - Icom IC-M88 Instruction Manual

■ Adjusting the squelch level

The IC-M88 has a squelch even though there is no control
knob for it. In order to receive signals properly, as well as for
the scan to function effectively, the squelch must be adjusted
to the proper level.
q Push [SQL], then adjust the squelch level with [Y]/[Z].
- "SL" indicator appears.
- There are 11 squelch levels to choose from: OP is completely
open; 10 is the tight squelch level.
- When no key is pushed for 5 sec., the transceiver returns to nor-
mal condition.
w Push [SQL] again to return to normal condition.

■ Automatic backlighting

This function is convenient for nighttime operation. The auto-
matic backlighting can be activated in SET mode. (p. 19)
➥ Push any key except for [PTT] to turn the backlighting
ON.
• The backlighting is automatically turned OFF after 5 sec. of inac-
tivity.
■ Voice scrambler operation
(Available for I/S version only)
D Activating the scrambler
The optional voice scrambler provides private communica-
tions. In order to receive or send scrambled transmissions,
you must first activate the scrambler function.
q Select an operating chan-
nel except Channel 16, 70 or
weather channels.
w While pushing and holding
[SQL], push [SCN• ].
DUAL
• "SCRM" appears.
e To turn the scrambler func-
tion OFF, repeat step w.
• "SCRM" disappears.
D Programming scramble codes
There are 32 codes (1 to 32) available for programming. Set
the code in SET mode. In order to understand each other, all
transceivers in your group must have the same scramble code,
as well as the same scrambler unit. See page 21 for scrambler
code setting details.
BASIC OPERATION
Appears when the
voice scrambler
function is in use.
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