Icom IC-M88 - Manual (Page 17)

11
4
BASIC OPERATION
■ 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 in-
activity.
■ 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 channel ex-
cept Channel 16, 70 or weather
channels.
w While pushing and holding
[SQL], push [SCN• DUAL ].
• “SCRM” appears.
e To turn the scrambler function
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.
Appears when the
voice scrambler
function is in use.
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