Icom IC-M88 - Squelch, Backlighting, and Scrambler Setup

■ 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.
11
4
BASICOPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Appearswhenthe
voice scrambler
function is in use.