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4
BASIC OPERATION
New2001
4
■Adjusting the squelch level
To adjust the IC-M72’s squelch level, use the [YY]/[ZZ]keys as
desired below. In order to receive signals properly, as well as
for the scan to function effectively, the squelch must be ad-
justed to the proper level.
qPush [], then adjust the squelch level with [YY]/[ZZ].
- “SQL” and the squelch level are displayed.
- There are 11 squelch levels to choose from: OPis completely
open; 10 is tight squelch; 1 is loose squelch level.
- When no key is pushed for 5 sec., the transceiver returns to
normal condition.
wPush []again to return to normal operating mode.
■Backlighting function
This function is convenient for nighttime operation. The back-
lighting can be turned OFF in the SETmode. (p. 19)
➥Push any key other than [PTT]to turn the backlighting ON.
•The backlighting is automatically turned OFF after 5 sec. of
inactivity.
■Voice scrambler operation

(available with some versions only)

DActivating the scrambler

The voice scrambler provides private communications. In
order to receive or send scrambled transmissions, you must
activate the scrambler function first.
qSelect an operating channel other than Channel 16, 70 or
weather channels.
wWhile pushing and
holding [], push
[SCAN•DUAL].
•“SCRM” appears.
eTo turn the scrambler
function OFF, repeat
step w.
•“SCRM” disappears.

DProgramming scramble codes

There are 32 codes (1 to 32) available for programming. Set
the code in the SETmode. In order to understand each other,
all transceivers in your group must use the same scramble
code, as well as the same scrambler unit. See p. 22 for
“Scrambler code” setting details.
Push Shows the squelch
level.
Appears during squelch
level adjustment
Appears when the voice scrambler
function is in use.
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