Icom IC-M35 User manual

INSTRUCTION MANUAL
iM35
VHF MARINE TRANSCEIVER

ii
CE versions of the IC-M35 which display the
“CE” symbol on the serial number seal, comply
with the essential requirements of the European
Radio and Telecommunication Terminal Directive
1999/5/EC.
This warning symbol indicates that this equip-
ment operates in non-harmonised frequency
bands and/or may be subject to licensing con-
ditions in the country of use. Be sure to check
that you have the correct version of this radio or
the correct programming of this radio, to comply
with national licensing requirement.
• List of Country codes (ISO 3166-1)
DECLARATION
OF CONFORMITY
We Icom Inc. Japan
1-1-32, Kamiminami, Hirano-ku
Osaka 547-0003, Japan
Kind of equipment:
VHF MARINE TRANSCEIVER
This compliance is based on conformity with the following harmonised
standards, specifications or documents:
i) EN 301 178-2 V1.2.2 (2007-2)
ii) EN 60945 2002
iii) EN 60950-1 2001
iv) EN 300 698-2 V1.1.1 (2000-8)
v) EN 300 698-3 V1.1.1 (2001-5)
vi)
vii)
Type-designation: iM35
Signature
Y. Furukawa
General Manager
Düsseldorf 30th Oct. 2008
Himmelgeister straße 100
D-40225 Düsseldorf
Icom (Europe) GmbH
Authorized representative name
Place and date of issue
Version (where applicable):
Declare on our sole responsability that this equipment complies the
essential requirements of the Radio and Telecommunications Terminal
Equipment Directive, 1999/5/EC, and that any applicable Essential Test
Suite measurements have been performed.
0560
DOC
1 Austria AT
2 Belgium BE
3 Bulgaria BG
4 Croatia HR
5 Czech Republic CZ
6 Cyprus CY
7 Denmark DK
8 Estonia EE
9 Finland FI
10 France FR
11 Germany DE
12 Greece GR
13 Hungary HU
14 Iceland IS
15 Ireland IE
16 Italy IT
17 Latvia LV
18 Liechtenstein LI
19 Lithuania LT
20 Luxembourg LU
21 Malta MT
22 Netherlands NL
23 Norway NO
24 Poland PL
25 Portugal PT
26 Romania RO
27 Slovakia SK
28 Slovenia SI
29 Spain ES
30 Sweden SE
31 Switzerland CH
32 Turkey TR
33 United Kingdom GB
Country Codes Country Codes

ii
IN CASE OF EMERGENCY RECOMMENDATION
If your vessel requires assistance, contact other vessels and
the Coast Guard by sending a distress call on Channel 16.
❍ USING CHANNEL 16
DISTRESS CALL PROCEDURE
1. “MAYDAY MAYDAY MAYDAY.”
2. “THIS IS ……………… ” (name of vessel)
3. Your call sign or other indication of the ves-
sel.
4. “LOCATED AT …………… ” (your position)
5. The nature of the distress and assistance
required.
6. Any other information which might facilitate
the rescue.
CLEAN THE TRANSCEIVER THOROUGHLY WITH FRESH
WATER after exposure to saltwater, and dry it before opera-
tion. Otherwise, the transceiver's keys, switches and control-
lers may become unusable due to salt crystallization.
NOTE: DO NOT wash the transceiver in water if there is any
reason to suspect the waterproof protection may not be ef-
fective. For example, in cases where the battery pack rubber
seal is damaged, the transceiver/battery pack is cracked or
broken, or has been dropped, or when the battery pack is
detached from the transceiver.

FOREWORD
Thank you for purchasing this Icom radio. The IC-M35 VHF MA-
RINE TRANSCEIVER is designed and built with Icom’s state of the
art technology and craftsmanship. With proper care this radio
should provide you with years of trouble-free operation.
IMPORTANT
READ ALL INSTRUCTIONS carefully and com-
pletely before using the transceiver.
SAVE THIS INSTRUCTION MANUAL—This
instruction manual contains important operating instructions
for the IC-M35.
EXPLICIT DEFINITIONS
WORD DEFINITION
RWARNING Personal injury, fire hazard or electric
shock may occur.
CAUTION Equipment damage may occur.
NOTE
If disregarded, inconvenience only. No risk
of personal injury, fire or electric shock.
FEATURES
☞Floating on water
The transceiver floats on fresh or salt
water even when the supplied acces-
sories are attached.
• When a third-party battery pack, strap,
antenna, etc. is used, it may sink.
• The battery contacts may be prone to rust
if the transceiver is kept floating on the
water.
☞Clear voice boost
The transceiver has the noise detection function which
enables automatic volume adjustment and the volume
loud function that enables you to maximize the volume
level instantly to provide clear communication in the
noisy marine environments.
☞Noise cancelling microphone
The sub-microphone on the rear panel inverts the phase
and cancels out the ambient noise from the main micro-
phone. As a result, the transceiver can reduce the influ-
ence of the background noise (particularly treble noise)
on the transmitted signal.
• The noise cancellation can produce no effect according to con-
ditions such as loudness and type of noise, or the position and
distance between the noise source and the microphone, etc.
• The noise cancellation does not work when an optional exter-
nal speaker-microphone is connected.
iii

iv
RWARNING! NEVER connect the transceiver to an
AC outlet. This may pose a fire hazard or result in an electric
shock.
RWARNING! NEVER hold the transceiver so that
the antenna is closer than 2.5 cm from exposed parts of the
body, especially the face or eyes, while transmitting. The
transceiver will perform best if the microphone is 5 to 10 cm
away from the lips and the transceiver is vertical.
NEVER connect the transceiver to a power source other
than the BP-251 (option) or BP-252. Such a connection will
ruin the transceiver.
DO NOT use or place the transceiver in direct sunlight or
in areas with temperatures below –15°C or above +55°C.
KEEP the transceiver out of the reach of children.
KEEP the transceiver at least 0.9 meters away from your
vessel’s magnetic navigation compass.
BE CAREFUL! The transceiver’s right-side panel will
become hot when operating continuously for long periods.
BE CAREFUL! The transceiver meets IPX7* require-
ments for waterproof protection. However, once the trans-
ceiver has been dropped, waterproof protection cannot be
guaranteed because of possible damage to the transceiver's
case or the waterproof seal.
* Only when the BP-251 (option) or BP-252, flexible antenna, [SP
MIC] cap is attached.
MAKE SURE the flexible antenna and battery pack are
securely attached to the transceiver, and that the antenna
and battery pack are dry before attachment. Exposing the
inside of the transceiver to water will result in serious dam-
age to the transceiver.
After exposure to water, clean the battery contacts thor-
oughly with fresh water and dry them completely to remove
any water or salt residue.
Icom, Icom Inc. and the logo are registered trademarks of Icom Incor-
porated (Japan) in the United States, the United Kingdom, Germany, France,
Spain, Russia and/or other countries.
PRECAUTIONS

v
DOC................................................................................................... i
IN CASE OF EMERGENCY............................................................. ii
RECOMMENDATION ....................................................................... ii
FOREWORD ................................................................................... iii
IMPORTANT.................................................................................... iii
EXPLICIT DEFINITIONS................................................................. iii
FEATURES...................................................................................... iii
PRECAUTIONS............................................................................... iv
TABLE OF CONTENTS.................................................................... v
1 OPERATING RULES ..................................................................1
2 SUPPLIED ACCESSORIES AND ATTACHMENTS ...............2–3
■Supplied accessories...............................................................2
■Attachments.............................................................................2
3 PANEL DESCRIPTION ...........................................................4–7
■Front, top, side and rear panels............................................... 4
■Function display.......................................................................6
4 BASIC OPERATION .............................................................8–13
■Channel selection ....................................................................8
■Receiving and transmitting ....................................................10
■Call channel programming.....................................................11
■Adjusting the volume level .....................................................11
■Volume loud function..............................................................12
■Volume mute function ............................................................12
■Adjusting the squelch level ....................................................12
■Lock function..........................................................................13
■Monitor function .....................................................................13
■Automatic backlighting...........................................................13
■AquaQuake water draining function....................................... 13
5 SCAN OPERATION (Except Holland version) .................14–15
■Scan types.............................................................................14
■Setting TAG channels ............................................................15
■Starting a scan.......................................................................15
6 DUALWATCH/TRI-WATCH (Except Holland version) ............16
■Description.............................................................................16
■Operation...............................................................................16
7 SET MODE..........................................................................17–20
■Set mode programming .........................................................17
■Set mode items......................................................................18
8 BATTERY CHARGING .......................................................21–24
■Battery caution.......................................................................21
■Supplied battery charger .......................................................23
■Optional battery case.............................................................23
■Optional battery charger ........................................................24
9 OPTIONAL SPEAKER-MICROPHONE....................................25
■HM-165 descriptions..............................................................25
■Attachment.............................................................................25
10 TROUBLESHOOTING ..............................................................26
11 VHF MARINE CHANNEL LIST.................................................27
12 SPECIFICATIONS.....................................................................28
13 OPTIONS ..................................................................................29
TABLE OF CONTENTS

D Priorities
• Read all rules and regulations pertaining to priorities and
keep an up-to-date copy handy. Safety and distress calls
take priority over all others.
• You must monitor Channel 16 when you are not operating
on another channel.
• False or fraudulent distress calls are prohibited under law.
D Privacy
• Information overheard but not intended for you cannot law-
fully be used in any way.
• Indecent or profane language is prohibited.
D Radio licenses
(1) SHIP STATION LICENSE
You must have a current radio station license before using
the transceiver. It is unlawful to operate a ship station which
is not licensed.
Inquire through your dealer or the appropriate government
agency for a Ship-Radiotelephone license application. This
government-issued license states the call sign which is your
craft’s identification for radio purposes.
(2) OPERATOR’S LICENSE
A Restricted Radiotelephone Operator Permit is the license
most often held by small vessel radio operators when a radio
is not required for safety purposes.
The Restricted Radiotelephone Operator Permit must be
posted or kept with the operator. Only a licensed radio op-
erator may operate a transceiver.
However, non-licensed individuals may talk over a trans-
ceiver if a licensed operator starts, supervises, ends the call
and makes the necessary log entries.
A current copy of the applicable government rules and regu-
lations is only required to be on hand for vessels in which a
radio telephone is compulsory. However, even if you are not
required to have these on hand it is your responsibility to be
thoroughly acquainted with all pertinent rules and regula-
tions.
1
1
OPERATING RULES
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

2
SUPPLIED ACCESSORIES AND ATTACHMENTS
2
■Supplied accessories
Battery packHandstrap
Belt clip
Battery charger
(with 2 screws)
Antenna
AC adapter
(Not supplied with
some version)
■Attachments
DFlexible antenna
Connect the supplied flexible an-
tenna to the antenna connector.
CAUTION!
• NEVER carry the transceiver
by holding the antenna.
• Transmitting without an an-
tenna may damage the trans-
ceiver.
DHandstrap
Pass the handstrap through
the loop on the back side of
the transceiver as illustrated
at right. This facilitates carry-
ing.
DBelt clip
Attach/detach the belt clip to the transceiver as illustrated
below.
To attach the belt clip To detach the belt clip
Be careful!
Not to break
your nails.
w
q

Screw position
when removing battery
Screw position
when attaching battery
Make sure the rubber seal (purple) is properly seated in the
groove and dust or other material does not adhere to it.
Battery pack Battery pack
Rubber seal
Groove
Correct position Incorrect position
NOTE:
When attaching a battery pack, make sure dust or other
material does not adhere to the rubber seal. If dust or other
material is on the seal when attaching a battery pack,
waterproof protection may not be guaranteed.
ïBattery pack
To remove the battery pack:
Turn the screw counter clockwise one quarter turn, then pull
the battery pack in the direction of the arrow as shown below.
To attach the battery pack:
Insert the battery pack in the transceiver completely, then
turn the screw clockwise one quarter turn.
NEVER remove or insert the battery pack when the trans-
ceiver is wet or soiled. This may result water or dust get-
ting into the transceiver/battery pack and may result in the
transceiver being damaged.
NOTE: When removing or attaching the battery pack, use
a coin or standard screwdriver to loosen or tighten the
bottom screw.
CAUTION!:
When attaching or removing a battery pack, make sure
the rubber seal is set in the groove of the battery pack
correctly. If the seal is not correctly in the groove, it may
be damaged when attaching the battery pack. If the seal
is damaged, waterproof protection is not guaranteed.
3
2
SUPPLIED ACCESSORIES AND ATTACHMENTS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

4
PANEL DESCRIPTION
3
■ Front, top, side and rear panels
qANTENNA CONNECTOR (p. 2)
Connects the supplied antenna.
w
SPEAKER-MICROPHONE CONNECTOR [SP MIC] (p. 25)
Connects the optional external speaker-microphone.
NOTE: Attach the [SP MIC] cap when the optional
speaker-microphone is not used. Otherwise, water will
get into the transceiver.
qAttach the [SP MIC] cap
.
wThen rotate it clockwise
completely.
q
w
e PTT SWITCH [PTT]
Push and hold to transmit; release to receive. (p. 10)
rCHANNEL 16 KEY [16 C]
➥Push to select Channel 16. (p. 8)
➥
Push and hold for 1 sec. to select the call channel. (p. 8)
➥When the call channel is selected, push and hold
for 3 sec. to enter the call channel programming
mode.(p.11)
➥While in the set mode, push to return to the normal
condition.(p.17)
Function
display
(pgs. 6, 7)
Speaker
y
t
r
e
u
w
q
!1
o
i
!0
Microphone
!2
Sub-microphone
(p. iii)

t VOLUME/SQUELCH/MONITOR KEY [VOL/SQL MONI]
➥Push to enter the volume adjustment mode and the
squelch adjustment mode. (pgs. 11, 12)
➥Push to restore the changed volume level by the noise
detection, volume loud, or volume mute function to the
original. (pgs. 12, 20)
➥Push and hold for 1 sec. to activate the monitor func-
tion. (p. 13)
➥While pushing and holding this key, turn power ON to
enter the set mode. (p. 17)
➥While in the set mode, push to select an item. (p. 17)
ySCAN/DUAL KEY [SCAN DUAL]
➥Push to start or stop normal or priority scan. (p. 15)
➥
Push and hold for 1 sec. to enter the watch mode. (p. 16)
➥Push to exit the watch mode. (p. 16)
➥Push and hold this key and [Hi/Lo ] , to activate the
Aq
uaQuake function. (p. 13)
uCHANNEL UP/DOWN KEYS [Y]/[Z]
➥Selects an operating channel. (pgs. 8, 9)
➥While in the set mode, selects the setting or value of an
item. (p. 17)
➥Checks TAG channels or changes scanning direction
during scan. (p. 15)
iFAVOURITE/TAG KEY [FAV TAG]
➥Push this key to select the favourite (TAG) channels
with ignoring untagged channels in a channel group in
sequence. (p. 8)
➥Push and hold for 1 sec. to set or clear TAG for the
displayed channel. (p. 15)
➥While pushing and holding this key, turn power ON to
clear or set all TAG channels in the selected channel
group. (p. 15)
oCHANNEL KEY [CH]
➥Push and hold for 1 sec. to select the channel group
from U.S.A.*, International and ATIS†. (p. 9)
➥Push to return to the previous channel before selecting
channel 16 or the call channel.
* U.K. version only. †German and Holland versions only.
!0 TRANSMIT POWER/LOCK KEY [Hi/Lo ]
➥
Push to select the output power from high and low. (p.10)
➥Push and hold for 1 sec. to turn the key lock function
ON or OFF. (p. 13)
!1 POWER KEY [ ]
Push and hold to turn power ON or OFF.
!2 LOUD/MUTE KEY [LOUD MUTE]
➥
Push to turn the volume loud function ON or OFF. (p. 12)
➥Push and hold for 1 sec. to turn the volume mute func-
tion ON, and push to turn the function OFF. (p. 12)
5
3
PANEL DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Volume adjustment mode
Normal condition
Squelch adjustment mode
PUSH
PUSH
PUSH

6
3PANEL DESCRIPTION
■Function display
!5 !3!4
i
u
o
!2
!1
!0
!8
!6
qer ytw
!7
q TRANSMIT INDICATOR (p. 10)
Appears while transmitting.
w BUSY INDICATOR
➥Appears when receiving a signal or when the squelch
opens. (p. 10)
➥Blinks while monitoring. (p. 13)
e TAG CHANNEL INDICATOR (p. 15)
Appears when a TAG channel is selected.
r CALL CHANNEL INDICATOR (p. 8)
Appears when the call channel is selected.
t LOCK INDICATOR (p. 13)
Appears while the lock function is activated.
y BATTERY INDICATOR
Indicates remaining battery power.
Indication
Full Middle Charging
required No battery
Battery level
blinks when the battery is exhausted.
blinks when the battery is over charged.
u SCAN INDICATOR (p. 15)
Blinks during scan.
i DUALWATCH/TRI-WATCH INDICATORS (p. 16)
“DUAL” appears during Dualwatch; “TRI” appears during
Tri-watch.
o DUPLEX INDICATOR
Appears when a duplex channel is selected.
!0 SUB CHANNEL READOUT
➥Indicates Channel 16 during priority scan, Dualwatch
or Tri-watch. (p. 16)
➥Indicates the set mode item while in the set mode. (p. 17)
➥Indicates the volume level while in the volume adjust-
ment mode. (p. 11)
➥Indicates the squelch level while in the squelch adjust-
ment mode. (p. 12)

!1 SQUELCH LEVEL INDICATOR
Shows the squelch level.
!2 VOLUME LEVEL INDICATOR
➥Shows the volume level.
➥The bars appear in ascending order repeatedly while
the volume loud function is activated. (p. 12)
➥
Blinks while the volume mute function is activated. (p. 12)
!3 VOLUME LEVEL ADJUSTING INDICATOR (p. 11)
➥Blinks while adjusting the volume level.
➥This indicator and the volume level indicator appear
alternately while the volume level is turned up by the
noise detection function. (p. 20)
!4 SQUELCH LEVEL ADJUSTING INDICATOR (p. 12)
Blinks while adjusting the squelch level.
!5 CHANNEL NUMBER READOUT
➥Indicates the selected operating channel number.
➥In the set mode, indicates the selected condition or
value.
(p. 17)
!6 CHANNEL GROUP INDICATOR (p. 9)
“” appears when U.S.A. channel group*; “ ” appears
when International channel group is selected.
* U.K. version only.
!7 ATIS INDICATOR (p. 9)
“ATIS” appears when the channel group, which ATIS func-
tion is activated, is selected. (Available with German and
Holland versions only.)
!8 LOW POWER INDICATOR (p. 10)
➥“ LOW” appears when low power is selected.
➥“LOW” blinks when switching forced low power mode
because of a high temperature error or low voltage.
7
3
PANEL DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

8
BASIC OPERATION
4
■Channel selection
IMPORTANT!: Prior to using the transceiver for the first
time, the battery pack must be fully charged for optimum
life and operation. To avoid damage to the transceiver,
turn the power OFF while charging.
DChannel 16
Channel 16 is the distress and safety channel. It used for
establishing initial contact with a station and for emergency
communications. Channel 16 is monitored during both Du-
alwatch and Tri-watch. While in the standby condition, you
must monitor Channel 16.
qPush [16 C] momentarily to select Channel 16.
wPush [CH] to return to the channel used before Channel
16, or push [Y]/[Z]to select a channel.
Push
Convenient!
While pushing and holding [FAV TAG], push [Y]/[Z] to select
the favourite (TAG) channels with ignoring untagged chan-
nels in the selected channel group in sequence.
• Pushing [FAV TAG] only advances the displayed TAG channel.
• The favourite channels are selected using the TAG channel setting.
(p. 15)
DCall channel
Each regular channel group has separate leisure-use call
channels. The call channel is monitored during Tri-watch.
The call channels can be programmed (p. 11) and are used
to store your most often used channel in each channel group
for quick recall.
qPush and hold [16 C] for 1 sec. to select the call channel
of the selected channel group.
• “CALL” and call channel number appear.
• Each channel group may have an independent call channel
after programming a call channel. (p. 11)
wPush [CH] to return to the channel used before call chan-
nel, or push [Y]/[Z]to select a channel.
Push and hold
for 1 sec.

DU.S.A., International and ATIS channels
The transceiver is pre-programmed with U.S.A.*, Interna-
tional and ATIS†channels. These channel groups may be
specified for the operating area.
* U.K. version only.
†
German and Holland versions only.
qPush [CH] to select a regular channel.
wPush and hold [CH] for 1 sec. to change the channel
group.
• International and U.S.A., International and ATIS channel groups
can be selected in sequence.
ePush [Y]/[Z]to select a channel.
• “DUP” appears for duplex channels.
9
4
BASIC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Push and hold
for 1 sec.
U.S.A. channels
International channels
ATIS channels

10
4BASIC OPERATION
■Receiving and transmitting
CAUTION: Transmitting without an antenna may damage
the transceiver.
q Push and hold []to turn power ON.
w Set the volume and squelch levels.
You can enter each adjust mode with [VOL/SQL MONI].
➥ Enter the squelch adjustment mode, and push [Z]sev-
eral times to open the squelch.
➥Enter the volume adjustment mode, then push [Y]/[Z]
to adjust the volume level.
➥Enter the squelch adjustment mode again, and push
[Y]until the noise disappears.
e Push [Y]/[Z]to select the desired channel.
• When receiving a signal, “ ” appears and audio is emitted
from the speaker.
• Further adjustment of the audio may be necessary at this point.
r Push [Hi/Lo ] to select the output power if necessary.
• “LOW” appears when low power is selected; no indication when
high power is selected.
• Choose low power for short range communications, choose
high power for longer distance communications.
• Some channels are for low power only.
t Push and hold [PTT] to transmit, then speak into the
microphone.
• “ ” appears.
• Channel 70 cannot be used for transmission.
y Release [PTT] to receive.
IMPORTANT: To maximize the readability of your trans-
mitted signal, pause a few sec. after pushing [PTT], hold
the microphone 5 to 10 cm from your mouth and speak
into the microphone at a normal voice level.
NOTE: The transceiver has a power save function to con-
serve the battery power. The power save function acti-
vates automatically when no signal is received for 5 sec.
Microphone
rSet output
power.
qPower ON.
tPush to
transmit.
yRelease to
receive.
eSet channel.
Enter the volume
and squelch ad-
justment mode.
w
wAdjust the
volume and
squelch level.

■Call channel programming
Call channel is used to access Channel 16 (default; may
differ according to the version), however, you can program
the call channel with your most often-used channels in each
channel group for quick recall.
qPush and hold [CH] for 1 sec. once or twice to select the
desired channel group (U.S.A., International or ATIS) to
be programmed. (p. 9)
wPush and hold [16 C] for 1 sec. to select the call channel
of the selected channel group.
• “CALL” and call channel number appear.
e Push and hold [16 C] again for 3 sec.
(until a long beep changes to 2
short beeps) to enter the call chan-
nel programming mode.
• Channel number starts blinking.
rPush [Y]/[Z]to select the desired
channel.
tPush [16 C] to program the dis-
played channel as the call channel.
• The channel number stops blinking.
■Adjusting the volume level
The volume level can be adjusted with [VOL/SQL MONI]
and [Y]/[Z].
qPush [VOL/SQL MONI] once to enter the volume adjust-
ment mode, then adjust the volume level with [Y]/[Z].
• “VOL” indicator starts blinking.
• The transceiver has 31 volume levels and OFF.
• With no key operation is performed for 5 sec., the transceiver
returns to the normal condition.
wPush [VOL/SQL MONI] twice to exit the volume adjust-
ment mode.
11
4
BASIC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Indicates the
volume level.
Blinks while adjustin
g
the volume level.

12
4BASIC OPERATION
■Volume loud function
The volume loud function can be activated temporarily by
pushing [LOUD MUTE].
The function does not work when the volume level is 31.
qPush [LOUD MUTE] to activate the volume loud function.
• The volume level is set to the maximum level (level 31).
• The bars of the volume level indicator appears in ascending
order repeatedly.
wPush [LOUD MUTE] again, or push [VOL/SQL MONI] to
turn the volume loud function OFF.
■Volume mute function
The volume mute function can be activated temporarily by
pushing and holding [LOUD MUTE].
The function does not work when the volume level is OFF.
qPush and hold [LOUD MUTE] for 1 sec. to activate the
volume mute function.
• The volume level is set to the minimum level (OFF).
• The volume level indicator blinks.
wPush [LOUD MUTE] again, or push [VOL/SQL MONI] to
turn the volume mute function OFF.
■Adjusting the squelch level
The squelch level can be adjusted with [VOL/SQL MONI]
and [Y]/[Z].
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 [VOL/SQL MONI] twice to enter the squelch adjust-
ment mode, then adjust the squelch level with [Y]/[Z].
• “SQL” indicator starts blinking.
• The transceiver has 11 squelch levels: OP is completely open;
10 is tight squelch; 1 is loose squelch.
• With no key operation is performed for 5 sec., the transceiver
returns to the normal condition.
wPush [VOL/SQL MONI] again to exit the squelch adjust-
ment mode.
Indicates the
squelch level.
Blinks while adjusting the squelch level.

■Lock function
This function electronically locks all keys (except for [PTT],
[VOL/SQL MONI],[LOUD MUTE], [Hi/Lo ] and [Y]/[Z]*)
to prevent accidental channel changes and function access.
* In the volume or squelch adjustment mode only.
➥Push and hold
[Hi/Lo ] for 1 sec. to turn the lock func-
tion ON and OFF.
■Monitor function
The monitor function opens the squelch. The monitor key ac-
tion can be selected in the set mode. (p. 19)
➥The monitor function is activated by pushing and holding
[VOL/SQL MONI] for 1 sec .
• “ ” blinks and the squelch is opened.
■Automatic backlighting
This function lights the function display and keys, and it is
convenient for night-time operation. The automatic back-
lighting can be activated in the set mode. (p. 19)
➥ Push any key except for [PTT] to turn the backlight ON.
• The backlight is automatically turned OFF after 5 sec. of inactivity.
■AquaQuake water draining
function
The AquaQuake water draining function clears water away
from the speaker grill. Without this function, water may muffle
the sound coming from the speaker. The transceiver emits a
vibrating beep when this function is activated.
➥Push and hold both
[SCAN DUAL] and [Hi/Lo ] .
• A low beep tone sounds for 9 sec. to drain water, regardless of
the volume level setting.
• The transceiver never accepts key operation while the
AquaQuake function is activated.
• The AquaQuake function can not be activated when an optional
speaker-microphone is connected.
13
4
BASIC OPERATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Blinks while the monitor function is activated.
Push and hold
for 1 sec.
Appears while the lock function is activated.
Push and hold
for 1 sec.

14
SCAN OPERATION (Except Holland version)
5
■Scan types
Scanning is an efficient way to locate signals quickly over a
wide frequency range. The transceiver has priority scan and
normal scan.
In addition, the auto scan function is available for standby
convenience. This function can be activated depending on
the setting in the set mode. (p. 18)
Set the TAG channels (scanned channels) before scanning.
Clear the TAG for unwanted channels which inconveniently
stop scanning, such as those for digital communications.
(p. 15)
Choose the desired scan type from "Priority" or "Normal"
in the set mode. (p. 18)
PRIORITY SCAN
CH 88
CH 01
CH 16
CH 02
CH 05 CH 04
CH 03
Priority scan searches through all TAG channels in se-
quence while monitoring Channel 16. When a signal is
detected on Channel 16, scan pauses until the signal
disappears; when a signal is detected on a channel other
than Channel 16, scan becomes Dualwatch until the sig-
nal disappears.
NORMAL SCAN
CH 01 CH 02
CH 88
CH 05 CH 04
CH 03
Normal scan, like priority scan, searches through all TAG
channels in sequence. However, unlike priority scan,
Channel 16 is not checked unless Channel 16 is set as a
TAG channel.