Icom IC-M88 Adjusting the squelch level, Voice scrambler operation, Automatic backlighting

■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.

qPush [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.

wPush [SQL] again to return to normal condition.

BASIC OPERATION 4

■Voice scrambler operation

(Available for I/S version only)

DActivating 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	Appears when the
OFF, repeat step w.
	voice scrambler
• “SCRM” disappears.
	function is in use.

■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.

DProgramming 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.

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