Icom Ic-4088a Frs Uhf Fm Transceiver Instruction Manual

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3
BATTERY CHARGING
23
Battery cautionCAUTION NEVERshort the terminals. 
NEVERmix old and new batteries.
NEVERincinerate used battery cells. Internal battery gas may
cause explosion.
Make sureall battery cells are the same brand, type and capacity.
AVOID over charging— The BP-202 can be charged during oper-
ation when the AC adapter or the optional cigarette lighter cable is
connected. To prevent over charging, the IC-4088A has charging
timer that automatically disconnecting the charging line electroni-
cally after 15 hours from charging. However, the charging timer will
reset and start charging again when disconnect then re-connecting
the AC adapter or CP-18A more than 1 min. interval.
Recommended temperature range for charging: 
+50˚F to +104˚F (+10˚C to +40˚C)
The optional BP-202 
BATTERY PACK
includes rechargeable Ni-Cd
batteries and can be charged approx. 300 times. Charge the battery
pack before first operating the transceiver or when the battery pack
becomes exhausted.
If the battery pack seems to have no capacity even after being fully
charged, completely discharge it by leaving the power ON all day.
Then, fully charge the battery pack again.
If the battery pack still does not retain a charge (or very little), a new
battery pack must be purchased.
D D
Recycling information(U.S.A. only)
The battery (BP-202) that you have purchased is
recyclable. At the end of its life, under various
state and local laws, it may be illegal to dispose
of this battery into the municipal waste stream.
Call 1-800-822-8837 for battery recycling options
in your area or contact your dealer.
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BATTERY CHARGING
Charging connectionsD
DRegular charging with the BC-149A, CP-18A➥Connect the optional BC-149A
AC ADAPTER
or CP-18A
CIGARETTE
LIGHTER CABLE
to [DC 6V].
•Charging period: approx. 15 hours
IMPORTANT!:
Use the BC-149A or CP-18AONLY. Other type of AC adapter,
cigarette lighter cable or DC power cable with an external power
supply may damage the transceiver.
The optional BP-202 can only be charged— other AA (R6) size
rechargeable Ni-Cd cannot be charged.
BE SUREto disconnect the CP-18A from the cigarette lighter
socket when charging is finished, because, a slight current still
follows in the CP-18A and the vehicle’s battery will become ex-
hausted.to [DC 6V]
jack
Optional CP-18A
Cigarette lighter cable 
with DC-DC converter
Optional BC-149Ato cigarette 
lighter socket
to AC  outlet
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BATTERY CHARGING
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D DRapid charging with the BC-119N+AD-105qInsert the optional AD-105 
DESKTOP CHARGER ADAPTER
into the
charging slot of the BC-119N.
wInsert the battery pack, either by itself or attached to the trans-
ceiver, into the charger. 
IC-4088ABP-202
AD-105
BC-119N AC adapter
NOT used: 
Fix the 3-pin connector to the bottom of the charger with the 
adhesive tape, etc., to prevent catching or touching the 3-pin 
connector’s terminals with the adapter’s leads, etc.*
*NOTE: Put the Ni-Cd 
battery adapter into the 
AD-105 rear slot when 
the BP-202 is attached 
to the transceiver.
Turn the power OFF! When the installed Ni-Cd 
battery is nearly exhausted 
and the function display 
blinks in intermittently, 
push [PWR] until the trans-
ceiver’s power goes OFF.
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BASIC OPERATION
Power ON➥Push [PWR] for 1 sec. to turn
the power ON.•“ ” and operating channel num-
ber appear on the display.Adjusting the volumeqPush and hold [MODE] for
1 sec. to open the squelch
(monitor function ON).•“ ” indicator appears on the dis-
play while the squelch is open.wAdjust the audio to a suitable
level using [
VOL
].
ePush and hold [MODE] for
1 sec. to close the squelch.
✔What is squelch?A squelch circuit allows muting of undesired noise while receiving
no signal and emit audio while receiving signals.
This provides quiet standby. The [MODE] key changes the
squelch setting. This is useful to listen to weak signals that do
not open the squelch.
[PWR][MODE] Appears[VOL]
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BASIC OPERATION
4
Selecting the operating channelPush [Y] or [Z] keys several times
until the desired operating channel
number appears on the display.
•While pushing and holding [Y] or
[Z] keys, the displayed channel
changes continuously until chan-
nel number “1” appears.
To keep the automatic selection,
release the [Y] or [Z] keys then
push and hold them again.
•When displayed channel stops at channel number “1,” a beep is
emitted. 
NOTE:
•The transceiver has 14 operating frequency channels.
• The selected channel is memorised when the transceiver is
turned off.
[Y]
[Z]
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RECEIVE AND TRANSMIT
qSelect the desired operating
channel with [Y]/[Z].
When a signal is received:
• “” indicator appears on the
display.
•Squelch opens and audio is
emitted from the speaker.
- Further adjustment of [VOL]
may be necessary at this point.
wPush and hold [PTT] to transmit
then speak into the microphone.•Do not hold the transceiver too
close to your mouth or speak too
loudly. This may distort the sig-
nal.
•The transmit indicator “” ap-
pears on the display.eRelease [PTT] to return to re-
ceive.
IMPORTANT:
To maximize the readability of the transmitted signal, pause a
few sec. after pushing [PTT], hold the transceiver 4 to 6 in. (10 to
15 cm) from your mouth and speak at a normal voice level.
NOTE:
The transceiver has an auto power save function to conserve
the battery power. The power save function activates automati-
cally when no signal is received for 5 sec.
[Y][Z][PTT]Appears
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RECEIVE AND TRANSMIT
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✔Talk Range
The IC-4088A is designed to maximize performance and improve
transmission range in the field. However, the single most impor-
tant factor in transmit range (talk power) is the surrounding envi-
ronment. These radios are “line of sight” radios and as such,
transmission range are influenced by the degree to which you
can “see” the other communicating party. Large concrete struc-
tures and heavy foliage or transmission from inside a building or
vehicle will reduce the talk power range.
•Optimal range: wide, open areas free of obstructions.
•Medium range: large buildings or trees blocking your line of
sight.
•Minimum range: mountainous areas or areas of heavy foliage.
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GROUP MODE (CTCSS)
Setting the group codeThe IC-4088A is equipped with 38 group codes. Group mode oper-
ation provides communication with silent standby since you will only
receive calls from group members using the same group number.
First of all, set the same group code number for all group member’s
transceivers.
To turn ON the group mode op-
eration:
qPush [MODE] to enter set mode.•“---” (group mode OFF) appears
on the display. wPush [Y] or [Z] to select the de-
sired code number.
ePush [MODE] twice to set the
group code number and exit set
mode.
To cancel the group mode oper-
ation:
qPush [MODE] to enter set mode. •Channel number disappears on
the display. wPush [Y] or [Z] to select “---”
(group mode OFF).
ePush [MODE] twice to cancel
the group mode and return to
operating condition.
NOTE: Only stations with the same group channel number can
be heard during group mode operation, even when the busy in-
dicator appears on the display. 
[Y]
[Z][MODE]
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GROUP MODE (CTCSS)
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D D
CTCSS code table
(unit: Hz) CH Freq. CH Freq. CH Freq. CH Freq.
01 67.0 11 97.4 21 136.5 31 192.8
02 71.9 12 100.0 22 141.3 32 203.5
03 74.4 13 103.5 23 146.2 33 210.7
04 77.0 14 107.2 24 151.4 34 218.1
05 79.7 15 110.9 25 156.7 35 225.7
06 82.5 16 114.8 26 162.2 36 233.6
07 85.4 17 118.8 27 167.9 37 241.8
08 88.5 18 123.0 28 173.8 38 250.3
09 91.5 19 127.3 29 179.9---OFF
10 94.8 20 131.8 30 186.2
✔What is CTCSS (Continuous Tone Coded Squelch System)
GROUP MODE ?
CTCSS (Continuous Tone Coded Squelch System) GROUP
MODE allows communication with silent stand by. Only signals
containing a specific group code can open the squelch.
This conveniently eliminates unwanted audio and is useful in
group activities or security related activities where unwanted out-
put can be a problem. Note that CTCSS group mode is not pri-
vate—anyone can receive your calls.The IC-4088A is equipped with 38 tone codes for CTCSS GROUP
MODE use. Selecting a code applies it to all 14 operating chan-
nels. Each push of [PTT] superimposes your group code over your
transmit signal; and, only signals containing the same code can
open your squelch. To temporarily hear all signals (including noise)
push and hold [MODE]. Do not use CTCSS GROUP MODE if you
want to be able to hear signals on all channels.
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SCAN FUNCTION
Scanning is an efficient way to locate signals quickly over all chan-
nels. Select scan resume condition in advance, using Initial Set
Mode (p. 17)DStarting the scan➥While pushing [Y], push [Z] to
start the scan.
• “-” flashes.
• While pushing [Z], pushing
[Y] also starts the scan.
• Push [Z] or [Y] to change the
scanning direction or resume
the scan manually.
• To cancel the scan, push [Z]
(or [Y]) while [Y] (or [Z]) is
pushed, or push [PTT].
CH 14
CH 3
CH 2
CH 1
CH 4
CH 5
[Z][Y]
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