User Guide

11
4
BASIC OPERATION
■ Adjusting the squelch level
To adjust the IC-M90E’s squelch level, use the [Y]/[Z] keys as
described 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.
q Push [SQL•
MONI], then adjust the squelch level with [Y]/[Z].
- “SQL” indicator starts blinking.
- There are 11 squelch levels to choose from: OP is completely
open; 10 is tight squelch; 1 is loose squelch level.
w Push [SQL•
MONI] again to return to normal condition.
- When no switch is pushed for 5 sec., the transceiver returns to
normal condition.
■ Backlighting function
This function is convenient for nighttime operation. The back-
lighting brightness can be adjusted in the SET mode. (p. 18)
➥ Push any key except [PTT] to turn the backlighting ON.
• The backlighting is automatically turned OFF after 5 sec. of
inactivity.
■ Voice scrambler operation
D Activating the scrambler
The voice scrambler provides private communications. In
order to receive or send scrambled transmissions, you must
activate the scrambler function first.
q
Select an operating
channel except Channel
16 or 70.
w While pushing and
holding [SQL•
MONI],
push [SCAN•
DUAL].
•“SCRM” appears.
e To turn the scrambler
function OFF, repeat
step w.
•“SCRM” disappears.
D Programming scramble codes
32 scrambler codes (1 to 32) are available for voice scrambler
operation. Set the code in the SET mode. In order to under-
stand each other, all transceivers in your group must have the
same scrambler code. See p.
20 for “Scrambler code” setting
details.
Appears when the voice
scrambler function is in use.
Blinks during the squelch
level adjutment.
Indicates the
squelch level.
Push