Icom iM504 User manual

INSTRUCTION MANUAL
iM504
VHF MARINE TRANSCEIVER

i
FOREWORD
Thank you for purchasing this Icom product. The IC-M504
VHF MARINE TRANSCEIVER is designed and built with Icom’s
state of the art technology and craftsmanship. With proper
care, this product should provide you with years of trouble-
free operation.
We want to take a couple of moments of your time to thank
you for making the IC-M504 your radio of choice, and hope
you agree with Icom’s philosophy of “technology first.” Many
hours of research and development went into the design of
your IC-M504.
D FEATURES
❍Simple operation with large keys
❍Easy to hear speaker
❍Built-in DSC meets ITU Class D requirement
❍Rugged waterproof construction
❍Optional COMMANDMIC (HM-162/HM-157) are
available
IMPORTANT
READ ALL INSTRUCTIONS carefully and completely
before using the transceiver.
SAVE THIS INSTRUCTION MANUAL — This in-
struction manual contains important operating instructions for
the IC-M504.
EXPLICIT DEFINITIONS
WORD DEFINITION
RWARNING!
CAUTION
NOTE
Personal injury, fire hazard or electric shock
may occur.
Equipment damage may occur.
Recommended for optimum use. No risk of
personal injury, fire or electric shock.
CLEAN THE TRANSCEIVER AND MICROPHONE THOR-
OUGHLY WITH FRESH WATER after exposure to water
including salt, otherwise, the keys and switch may become
inoperable due to salt crystallization.
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.
COMMANDMIC II and COMMANDMIC III is a trademark of Icom Incorporated
(Japan) in the United States.

ii
IN CASE OF EMERGENCY
If your vessel requires assistance, contact other vessels and
the Coast Guard by sending a Distress call on Channel 16.
Or, transmit your Distress call using digital selective calling
on Channel 70.
NOTE
A WARNING STICKER is supplied with the transceiver.
To comply with FCC regulations, this sticker must be affixed in
such a location as to be readily seen from the operating con-
trols of the radio as in the diagram below. Make sure the cho-
sen location is clean and dry before applying the sticker.
EXAMPLE
WARNING
STICKER
USING DIGITAL SELECTIVE CALLING (Ch 70)
DISTRESS CALL PROCEDURE
1. While lifting up the key cover, push and hold
[DISTRESS] for 5 sec. until you hear 5 short beeps
change to one long beep.
2. Wait for an acknowledgment on Channel 70 from a coast
station.
• After the acknowledgement is received, Channel 16 is auto-
matically selected.
3. Push and hold [PTT], then transmit the appropriate
information as listed above.
USING CHANNEL 16
DISTRESS CALL PROCEDURE
1. “MAYDAY MAYDAY MAYDAY.”
2. “THIS IS ...............” (name of vessel).
3. Say your call sign or other indication of the vessel (AND
9-digit DSC ID if you have one).
4. “LOCATED AT ...............” (your position).
5. State the nature of the distress and assistance required.
6. Give any other information which might facilitate the
rescue.

iii
RADIO OPERATOR WARNING
Icom requires the radio operator to meet the
FCC Requirements for Radio Frequency Expo-
sure. An omnidirectional antenna with gain not
greater than 9 dBi must be mounted a minimum
of 5 meters (measured from the lowest point of
the antenna) vertically above the main deck and
all possible personnel. This is the minimum safe separation
distance estimated to meet all RF exposure compliance re-
quirements. This 5 meter distance is based on the FCC Safe
Maximum Permissible Exposure (MPE) distance of 3 meters
added to the height of an adult (2 meters) and is appropriate
for all vessels.
For watercraft without suitable structures, the antenna must
be mounted so as to maintain a minimum of 1 meter vertically
between the antenna, (measured from the lowest point of the
antenna), to the heads of all persons AND all persons must
stay outside of the 3 meter MPE radius.
Do not transmit with radio and antenna when persons are
within the MPE radius of the antenna, unless such persons
(such as driver or radio operator) are shielded from antenna
field by a grounded metallic barrier. The MPE Radius is the
minimum distance from the antenna axis that person should
maintain in order to avoid RF exposure higher than the allow-
able MPE level set by FCC.
WARNING
FAILURE TO OBSERVE THESE LIMITS MAY ALLOW
THOSE WITHIN THE MPE RADIUS TO EXPERIENCE RF
RADIATION ABSORPTION WHICH EXCEEDS THE FCC
MAXIMUM PERMISSIBLE EXPOSURE (MPE) LIMIT.
IT IS THE RESPONSIBILITY OF THE RADIO OPERATOR
TO ENSURE THAT THE MAXIMUM PERMISSIBLE EXPO-
SURE LIMITS ARE OBSERVED AT ALL TIMES DURING
RADIO TRANSMISSION. THE RADIO OPERATOR IS TO
ENSURE THAT NO BYSTANDERS COME WITHIN THE
RADIUS OF THE MAXIMUM PERMISSIBLE EXPOSURE
LIMITS.
Determining MPE Radius
THE MAXIMUM PERMISSIBLE EXPOSURE (MPE) RA-
DIUS HAS BEEN ESTIMATED TO BE A RADIUS OF
ABOUT 3M PER OET BULLETIN 65 OF THE FCC.
THIS ESTIMATE IS MADE ASSUMING THE MAXIMUM
POWER OF THE RADIO AND ANTENNAS WITH A MAXI-
MUM GAIN OF 9dBi ARE USED FOR A SHIP MOUNTED
SYSTEM.

iv
FOREWORD …………………………………………………………… i
IMPORTANT …………………………………………………………… i
EXPLICIT DEFINITIONS ……………………………………………… i
IN CASE OF EMERGENCY…………………………………………… ii
NOTE …………………………………………………………………… ii
RADIO OPERATOR WARNING ……………………………………… iii
TABLE OF CONTENTS ……………………………………………… iv
PRECAUTIONS ………………………………………………………… v
1 OPERATING RULES ……………………………………………… 1
2 PANEL DESCRIPTION ………………………………………… 2–5
■Front panel ……………………………………………………… 2
■Function display ………………………………………………… 4
■Microphone ……………………………………………………… 5
3 BASIC OPERATION…………………………………………… 6–11
■Channel selection ……………………………………………… 6
■Receiving and transmitting……………………………………… 8
■Call channel programming ……………………………………… 9
■Channel comments …………………………………………… 10
■Microphone Lock function …………………………………… 10
■Display backlight ……………………………………………… 10
■Optional voice scrambler operation ………………………… 11
4 SCAN OPERATION ………………………………………… 12–13
■Scan types ……………………………………………………… 12
■Setting TAG channels ………………………………………… 13
■Starting a scan ………………………………………………… 13
5 DUALWATCH/TRI-WATCH ……………………………………… 14
■Description ……………………………………………………… 14
■Operation ……………………………………………………… 14
6 DSC OPERATION …………………………………………… 15–49
■MMSI code programming……………………………………… 15
■MMSI code check ……………………………………………… 16
■DSC address ID………………………………………………… 17
■Position and time programming ……………………………… 21
■Position and time indication …………………………………… 22
■GPS information indication …………………………………… 22
■Distress call …………………………………………………… 23
■Transmitting DSC calls ………………………………………… 26
■Receiving DSC calls …………………………………………… 41
■Received messages …………………………………………… 45
■DSC Set mode ………………………………………………… 47
7 OTHER FUNCTIONS………………………………………… 50–54
■Intercom operation …………………………………………… 50
■RX Speaker function …………………………………………… 51
■Hailer operation ………………………………………………… 52
■Automatic foghorn function …………………………………… 53
8 SET MODE …………………………………………………… 55–57
■Set mode programming ……………………………………… 55
■Set mode items ………………………………………………… 55
9 CONNECTIONS AND MAINTENANCE …………………… 58–64
■Connections …………………………………………………… 58
■Supplied accessories ………………………………………… 59
■Antenna ………………………………………………………… 59
■Fuse replacement ……………………………………………… 59
■Mounting the transceiver ……………………………………… 60
■MB-75 installation ……………………………………………… 61
■UT-112/UT-98 installation ……………………………………… 62
■HM-162/HM-157 installation ………………………………… 63
10 TROUBLESHOOTING …………………………………………… 67
11 SPECIFICATIONS AND OPTIONS …………………………… 68
■Specifications …………………………………………………… 68
■Options ………………………………………………………… 69
12 CHANNEL LIST ………………………………………………… 70
TEMPLATE
TABLE OF CONTENTS 1
2
3
4
5
6
7
8
9
10
11
12

v
PRECAUTIONS
RWARNING! NEVER connect the transceiver to an AC
outlet. This may pose a fire hazard or result in an electric
shock.
CAUTION: Changes or modifications to this device, not ex-
pressly approved by Icom Inc., could void your authority to
operate this device under FCC regulations.
NEVER connect the transceiver to a power source of more
than 16 V DC or use reverse polarity. This will ruin the trans-
ceiver.
NEVER cut the DC power cable between the DC plug at the
back of the transceiver and fuse holder. If an incorrect con-
nection is made after cutting, the transceiver may be dam-
aged.
NEVER place the transceiver where normal operation of the
vessel may be hindered or where it could cause bodily injury.
KEEP the transceiver at least 3.3 ft (1 m) away from the
ship’s navigation compass.
DO NOT use or place the transceiver in areas with temper-
atures below –4°F (–20°C) or above +140°F (+60°C) or, in
areas subject to direct sunlight, such as the dashboard.
AVOID the use of chemical agents such as benzine or al-
cohol when cleaning, as they may damage the transceiver
surfaces. If the transceiver becomes dusty or dirty, wipe it
clean with a soft, dry cloth.
BE CAREFUL! The transceiver rear panel will become
hot when operating continuously for long periods.
Place the transceiver in a secure place to avoid inadvertent
use by children.
BE CAREFUL! The transceiver and the optional HM-162
COMMANDMIC III ™/HM-157
COMMANDMIC II ™ employ water-
proof construction, which corresponds to IPX8 of the interna-
tional standard IEC 60529 (2001). However, once the trans-
ceiver or microphone has been dropped, waterproofing
cannot be guaranteed due to the fact that the case may be
cracked, or the waterproof seal damaged, etc.

1
1
OPERATING RULES
DDPRIORITIES
• 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 signals are prohibited and pun-
ishable by law.
DDPRIVACY
• Information overheard but not intended for you cannot law-
fully be used in any way.
• Indecent or profane language is prohibited.
DDRADIO 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 opera-
tor may operate a transceiver.
However, non-licensed individuals may talk over a transceiver
if a licensed operator starts, supervises, ends the call and
makes the necessary log entries.
Keep a copy of the current government rules and regulations
handy.
Radio license for boaters (U.S.A. only)
The Telecommunications Act of 1996 permits recreational
boaters to have and use a VHF marine radio, EPIRB, and
marine radar without having an FCC ship station license.
Boaters traveling on international voyages, having an HF
single sideband radiotelephone or marine satellite termi-
nal, or required to carry a marine radio under any other
regulation must still carry an FCC ship station license. For
further information, see the FCC Ship Radio Stations Fact
Sheet.
1

2
PANEL DESCRIPTION
2
■Front panel
qDISTRESS KEY [DISTRESS]
Push for 5 sec. to transmit a Distress call. (p. 23)
wDSC MENU KEY [MENU]
Push to toggle the DSC menu appear or disappear. (p. 15)
eCLEAR KEY [CLR]
Push to cancel the entered function, exit Set mode. (p. 55)
rHAIL/RX SPEAKER KEY [HAIL•RX ]
➥Push to turn the hailer mode ON or OFF. (p. 52)
➥Push and hold for 1 sec. to turn the RX Speaker mode
ON or OFF. (p. 51)
➥While pushing and holding [H/L], push to turn the auto
foghorn function ON. (p. 54)
tATTENUATOR/INTERCOM KEY [LO/DX•IC•SCRM]
➥Push to turn the Attenuator function ON or OFF. (p. 8)
•“
LLOOCC” appears when the Attenuator function is turned ON.
➥Push and hold for 1 sec. to activate an optional Inter-
com function. (p. 50)
➥Push and hold to call the optional command micro-
phone while in Intercom mode. (p. 50)
➥While pushing and holding [H/L], push to turn the voice
scrambler function ON or OFF. (p. 11)
yCHANNEL 16/CALL CHANNEL KEY [16•9]
➥Push to select Channel 16. (p. 6)
➥Push and hold for 1 sec. to select Call channel. (p. 6)
•“
CCAALLLL” appears when Call channel is selected.
➥Push and hold for 3 sec. to enter Call channel program-
ming condition when Call channel is selected. (p. 9)
➥While pushing and holding [H/L], push to enter the
channel comment programming condition. (p. 10)
➥Advance the cursor while in the channel comment pro-
gramming condition. (p. 10)
➥While turning power ON, push to enter Set mode.
(p. 55)
Function display (p. 4)Speaker
q
e
r
t
y
w
uio!0!1
!2
!3
Depends on version

3
2
PANEL DESCRIPTION
uCHANNEL SELECTOR [DIAL•ENTER]
➥Rotate to select the operating channels, Set mode set-
tings, etc. (pgs. 6–8, 55)
➥While pushing and holding [H/L], rotate to adjust the
brightness of the LCD and key backlight. (p. 10)
➥Push to enter the input channel comment, selected
item, etc. (pgs. 10, 55)
➥Rotate to check TAG channels, changes scanning di-
rection or resumes the scan manually during scan.
(p. 13)
➥While pushing and holding [HAIL•RX ], rotate to ad-
just the audio level in RX Speaker mode. (p. 51)
➥Push and hold for 1 sec. to display the GPS information
when a GPS receiver is connected. (p. 22)
iCHANNEL/WEATHER CHANNEL KEY
[CH/WX•DUAL•U/I/C]
➥Selects and toggles the regular channel and Weather
channel when pushed momentarily. (p. 7)
➥Push and hold for 1 sec. to start Dualwatch or Tri-watch.
(p. 14)
➥Push to stop Dualwatch or Tri-watch when either is acti-
vated. (p. 14)
➥Move the cursor backward while in the channel com-
ment programming condition. (p. 10)
➥While pushing and holding [H/L], push to select one of
three channel groups in sequence. (p. 7)
• U.S.A., International and Canadian channels are available.
oSQUELCH CONTROL [SQL]
Rotate to set the squelch threshold level. (p. 8)
!0 SCAN/TAG KEY [SCAN•TAG] (p. 13)
➥Push to start and stop Normal or Priority scan.
➥Push and hold for 1 sec. to set or clear the displayed
channel as a TAG (scanned) channel.
➥While pushing and holding [H/L], push for 3 sec. to
clear or set all TAG channels in the selected channel
group.
!1 VOLUME CONTROL [VOL] (p. 8)
Rotate to adjust the audio level.
!2 TRANSMIT POWER KEY [H/L]
➥Push to toggle the power high or low. (p. 8)
• Some channels are set to low power only.
➥While pushing this key, some keys perform secondary
functions.
!3 POWER KEY [POWER] (p. 8)
➥Push to turn power ON.
➥Push and hold for 1 sec. to turn power OFF.
2

4
2PANEL DESCRIPTION
■Function display
qRX SPEAKER INDICATOR (p. 51)
Appears during the RX Speaker mode.
wPOWER INDICATOR (p. 8)
➥“2255WW” appears when high power is selected.
➥“11WW” appears when low power is selected.
eTAG CHANNEL INDICATOR (p. 13)
Appears when a TAG channel is selected.
rDUPLEX INDICATOR (p. 7)
Appears when a duplex channel is selected.
tCHANNEL GROUP INDICATOR (p. 7)
Indicates whether an U.S.A. “UUSSAA,” International “IINNTT,”
Canadian “CCAANN” or weather “WWXX” channel is in use.
yCALL CHANNEL INDICATOR (pgs. 6, 9)
Appears when the call channel is selected.
uLOW BATTERY INDICATOR
Blinks when the battery voltage drops to approx. 10 V DC
or below.
iCHANNEL NUMBER READOUT
Indicates the selected operating channel number.
oCHANNEL COMMENT INDICATOR
Channel comment appears if programmed. (p. 10)
!0 TIME ZONE INDICATOR
➥Shows the current time data when a GPS receiver is
connected.
•“
????” may blink every 2 sec. instead of current time data when
the GPS current time data is invalid.
•“
????” may blink every 2 sec. instead of current time data 4
hours after the time data is input manually, up until 23.5 hours
have past.
➥“LLooccaall” appears when the offset time data is set.
(p. 47)
➥“NNoo TTiimmee” appears when no GPS receiver is con-
nected and no time data is input manually.
BUSY 25W INT CALL
LOC RX DUP
SCRAM TAG
NORMAL SCAN
-4° 4.506N
12 °2 .2 6W
Local 1:10 CALLING
qwert y
!5
!4
!3
!1
!0
!2 i
o
u

5
2
PANEL DESCRIPTION
2
!1 POSITION INDICATOR
➥Shows the GPS position data.
•“
????” may blink every 2 sec. instead of position data when the
GPS position data is invalid. In such a case, the last position
data is held for up to 23.5 hours.
•“
????” may blink every 2 sec. instead of position data 4 hours
after the position data is input manually, up until 23.5 hours
have past.
➥“NNoo PPoossiittiioonn” appears when no GPS receiver is
connected and no position data is input manually.
!2 SCAN INDICATOR
➥“PPRRII--SSCCAANN 1166” appears during Priority scan;
“NNOORRMMAALL SSCCAANN” appears during Normal scan. (p. 13)
➥“DDUUAALL 1166” appears during Dualwatch; “TTRRII 1166” ap-
pears during Tri-watch. (p. 14)
!3 SCRAMBLER INDICATOR (p. 11)
Appears when the voice scrambler function is activated.
(only when the optional scrambler unit is installed.)
!4 LOCAL INDICATOR (p. 8)
Appears when the Attenuator function is turned ON.
!5 BUSY/TRANSMIT INDICATOR (p. 8)
➥“BBUUSSYY” appears when receiving a signal or when the
squelch opens.
➥“TTXX” appears while transmitting.
■Microphone
qPTT SWITCH [PTT]
Push and hold to transmit; release to receive. (p. 8)
wCHANNEL UP/DOWN KEYS [YY]/[ZZ]
➥Push either key to change the operating memory chan-
nel, Set mode settings, etc. (pgs. 6, 7, 55)
➥Checks TAG channels, changes scanning direction or
resumes the scan manually during scan. (p. 13)
eTRANSMIT POWER KEY [HI/LO]
➥Toggles power high and low when pushed. (p. 8)
• Some channels are set to low power only.
➥While pushing and holding [HI/LO], turn power ON to
toggle the Microphone Lock function ON and OFF.
(p. 10)
Microphone
w
q
e

6
BASIC OPERATION
3
■Channel selection
ïïChannel 16
Channel 16 is the distress and safety channel. It is used for
establishing initial contact with a station and for emergency
communications. Channel 16 is monitored during both Dual-
watch and Tri-watch. While standing by, you must monitor
Channel 16.
➥Push [16•9] momentarily to select Channel 16.
➥Push [CH/WX•DUAL•U/I/C] to return to the condition before
selecting Channel 16, or rotate [DIAL] to select an operating
channel.
ïïChannel 9 (Call channel)
Each regular channel group has a separate leisure-use call
channel. The call channel is monitored during Tri-watch. The
call channels can be programmed (p. 9) and are used to store
your most often used channel in each channel group for quick
recall.
➥Push [16•9] for 1 sec. to select the call channel of the se-
lected channel group.
•“
CCAALLLL” and call channel number appear.
• Each channel group may have an independent call channel after
programming a call channel. (p. 9)
➥Push [CH/WX•DUAL•U/I/C] to return to the condition be-
fore selecting call channel, or rotate [DIAL] to select an op-
erating channel.
25W25W INTINT CALLCALL
TAGTAG
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 CALLINGCALLING
Push
for 1 sec.
25W INT
TAG
4° 4.506N
12 °2 .2 6W
UTC 12:00 CALLING
Push

7
3
BASIC OPERATION
3
ïïU.S.A., international and Canadian channels
The IC-M504 is pre-programmed with 57 U.S.A., 57 interna-
tional and 61 Canadian channels. These channel groups may
be specified for the operating area.
qPush [CH/WX•DUAL•U/I/C] to select a regular channel.
• If a weather channel appears, push [CH/WX•DUAL•U/I/C] again.
wWhile pushing and holding [H/L], push [CH/WX•DUAL•
U/I/C] to change the channel group, if necessary.
• U.S.A., International and Canadian channel groups can be se-
lected in sequence.
eRotate [DIAL] to select a channel.
•“
DDUUPP” appears for duplex channels.
ïïWeather channels
The IC-M504 has 10 pre-programmed weather channels.
These are used for monitoring broadcasts from NOAA (Na-
tional Oceanographic and Atmospheric Administration.)
The transceiver can automatically detect a weather alert tone
on the selected weather channel while receiving the channel,
during standby on a regular channel or while scanning. (p. 56)
qPush [CH/WX•DUAL•U/I/C] once or twice to select a
weather channel.
•“
WWXX” appears when a weather channel is selected.
• “WWXX AALLEERRTT” appears when the Weather Alert function is in
use. (p. 56)
wRotate [DIAL] to select a channel.
WXWX ALERTALERT
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:001616 .275MHz.275MHz
WXWX
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:001616 .275MHz.275MHz
Push once or twice
When weather alert is OFF. When weather alert is ON.
25W25W USAUSA
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 PORTPORT OPROPR
25W25W INTINT
DUPDUP
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 TELEPHONETELEPHONE
25W25W CANCAN
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 CCGCCG
Push +

8
3BASIC OPERATION
■Receiving and transmitting
CAUTION: Transmitting without an antenna may dam-
age the transceiver.
qPush [POWER] to turn power ON.
wSet the audio and squelch levels.
➥Rotate [SQL] fully counterclockwise in advance.
➥Rotate [VOL] to adjust the audio output level.
➥Rotate [SQL] clockwise until the noise disappears.
eWhile pushing and holding [H/L], push [CH/WX•DUAL•
U/I/C] to change the channel group. (p. 7)
rRotate [DIAL] to select the desired channel. (pgs. 6, 7)
• When receiving a signal, “BBUUSSYY” appears and audio is emitted
from the speaker.
• Further adjustment of [VOL] may be necessary.
tPush [LO/DX•IC•SCRM] to turn the receive Attenuator
function ON or OFF, if necessary.
•“
LLOOCC” appears when the receive Attenuator function is in use.
yPush [H/L] to select the output power if necessary.
•“
2255WW” or “11WW” appears when high or low power is selected, re-
spectively.
• Choose low power for short range communications, choose high
power for longer distance communications.
• Some channels are for low power only.
uPush and hold [PTT] to transmit, then speak into the mi-
crophone.
•“
TTXX” appears.
• Channel 70 cannot be used for transmission other than DSC.
iRelease [PTT] to receive.
Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83 CAN-
NOT be lawfully used by the general public in U.S.A. wa-
ters.
IMPORTANT: To maximize the readability of your trans-
mitted signal, pause a few sec. after pushing [PTT], hold
the microphone 2 to 4 inches (5 to 10 cm) from your mouth
and speak into the microphone at a normal voice level.
t
Microphone
qy
reww
iu
rey

9
3
BASIC OPERATION
3
■Call channel programming
Call channel is used to select Channel 9 (default); however,
you can program the call channel with your most often-used
channels in each channel group for quick recall.
qWhile pushing and holding
[H/L], push [CH/WX•DUAL•
U/I/C] one or more times to
select the desired channel
group (U.S.A., International
or Canada) to be pro-
grammed.
wPush [16•9] for 1 sec. to se-
lect the call channel of the
selected channel group.
•“
CCAALLLL” and call channel
number appear.
ePush [16•9] again for 3 sec.
(until a long beep changes
to 2 short beeps) to enter
call channel programming.
• Channel number starts blink-
ing.
rRotate [DIAL] to select the
desired channel.
tPush [16•9] to program the
displayed channel as the
call channel.
• Push [CLR] to cancel.
• The channel number stops
blinking.
25W25W INTINT
DUPDUP
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 INTLINTL
25W25W INTINT CALLCALL
TAGTAG
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 CALLINGCALLING
25W25W INTINT CALLCALL
TAGTAG
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 CALLINGCALLING
25W25W INTINT CALLCALL
DUDUP
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 INTLINTL
25W25W INTINT CALLCALL
DUPDUP
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 INTLINTL

10
3BASIC OPERATION
■Channel comments
Memory channels can be labelled with a unique alphanumeric
ID of up to 10 characters.
Capital letters, small letters, 0 to 9, some symbols (– . /) and
space can be used.
qSelect the desired channel.
• Cancel Dualwatch, Tri-watch or Scan in advance.
wWhile pushing and holding [H/L], push [16•9] to edit the
channel comment.
• A cursor and the first char-
acter start blinking alter-
nately.
eSelect the desired charac-
ter by rotating [DIAL].
• Push [16•9] or [CH/WX•
DUAL•U/I/C] to move the
cursor forward or backward, respectively.
rRepeat step eto input all characters.
tPush [DIAL•ENTER] to input and set the comment.
• Push [CLR] to cancel.
• The cursor and the character stop blinking.
yRepeat steps qto tto program other channel com-
ments, if desired.
■Microphone Lock function
The Microphone Lock function electrically locks [Y]/[Z]and
[HI/LO] keys on the supplied microphone. This prevents ac-
cidental channel changes and function access.
➥While pushing and holding [HI/LO] on the microphone, turn
power ON to toggle the Lock function ON and OFF.
■Display backlight
The function display and keys can be backlit for better visibil-
ity under low light conditions.
➥While pushing and holding [H/L], rotate [DIAL] to adjust
the brightness of the LCD and key backlight.
• The backlight is adjustable in 7 levels and OFF.
[HI/LO]
[Y]/[Z]
25W25W INTINT
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00PLEASURE__PLEASURE__

11
3
BASIC OPERATION
3
■Optional voice scrambler operation
DDActivating 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. To activate the
function, an optional scrambler unit is necessary. See pgs.
57, 62 for setting the scrambler unit. Ask your dealer for de-
tails.
The scrambler function automatically turns OFF when
Channel 16 or 70 is selected.
qRotate [DIAL] to select an operating channel other than
Channel 16 and 70.
wWhile pushing and holding [H/L], push [LO/DX•IC•SCRM]
to turn the optional scrambler function ON.
•“
SSCCRRAAMM” appears.
eTo turn the scrambler function OFF, repeat step w.
•“
SSCCRRAAMM” disappears.
DDProgramming scrambler codes
There are 32 codes (1 to 32) or 128 codes (0 to 127)* avail-
able for programming when an optional scrambler unit is in-
stalled. In order to understand one another, all transceivers
in your group must have the same scramble code. This func-
tion may not be available depending on dealer setting.
*Depends on the installed scrambler unit.
qTurn power OFF.
wWhile pushing [16•9], turn power ON to enter set mode.
eAfter the display appears, release [16•9].
rRotate [DIAL] to select the “SSccrraammbblleerr CCooddee,” push
[DIAL•ENTER].
tRotate [DIAL] to select the desired scrambler code.
yPush [DIAL•ENTER] to set and exit the scrambler code
item.
uPush [CLR], or rotate [DIAL] to select “EExxiitt,” push
[DIAL•ENTER] to exit set mode.
--Set Mode--
Scrambler Code
˘5
4
2
1
<ENT˘OK>
--Set Mode--
Dual/Tri
Beep
Contrast
Foghorn Frequency
Radio Power
Scrambler Type
˘Scrambler Code
--Set Mode--
˘Scan Type
Scan Timer
WX Alert
Dual/Tri
Beep
Contrast
Foghorn Frequency
+
to enter set mode.
Push
to select code,
then push.
Rotate
to select item,
then push.
Rotate
Select
Select
[Example]: Programming scrambler code 5.

12
SCAN OPERATION
4
■Scan types
Scanning is an efficient way to locate signals quickly over a
wide frequency range. The transceiver has Priority scan and
Normal scan.
When the Weather Alert function is turned ON, the previously
selected (last used) weather channel is also checked while
scanning. (p. 56)
Set the TAG channels (scanned channel) before scanning.
Clear the TAG channels which inconveniently stop scanning,
such as those for digital communication use. (Refer to right
page for details.)
Choose Priority or Normal scan in Set mode. (p. 55)
PRIORITY SCAN
Priority scan searches through all TAG channels in se-
quence while monitoring Channel 16. When a signal is de-
tected on Channel 16, scan pauses until the signal disap-
pears; when a signal is detected on a channel other than
Channel 16, scan becomes Dualwatch until the signal dis-
appears.
CH 06
CH 01
CH 16
CH 02
CH 05 CH 04
CH 03
NORMAL SCAN
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.
CH 01 CH 02
CH 06
CH 05 CH 04
CH 03

13
4
SCAN OPERATION
4
■Setting TAG channels
For more efficient scanning, add the desired channels as TAG
channels or clear the TAG for unwanted channels.
Channels that are not tagged will be skipped during scanning.
TAG channels can be assigned to each channel group (USA,
INT, CAN) independently.
qWhile pushing and holding [H/L], push [CH/WX•DUAL•U/I/C]
to select the desired channel group (USA, INT or CAN.)
wSelect the desired channel to be set as a TAG channel.
ePush [SCAN•TAG] for 1 sec. to set the displayed channel
as a TAG channel.
•“
TTAAGG” appears in the display.
rTo cancel the TAG channel setting, repeat step e.
•“
TTAAGG” disappears.
✔Clearing (or setting) all tagged channels
While pushing and holding [H/L], push [SCAN•TAG] for 3
sec. (until a long beep changes to 2 short beeps) to clear all
TAG channels setting in the channel group.
• Repeat above procedure to set all TAG channels.
■Starting a scan
Set scan type (Priority or Normal scan) and scan resume
timer in advance, using Set mode. (p. 55)
qWhile pushing and holding [H/L], push [CH/WX•DUAL•
U/I/C] to select the desired channel group (USA, INT,
CAN) if desired.
wSet TAG channels as described at left.
eMake sure the squelch is closed to start a scan.
rPush [SCAN•TAG] to start Priority or Normal scan.
•“
PPRRII--SSCCAANN 1166” appears at the channel comment indicator
during Priority scan.
•“
NNOORRMMAALL SSCCAANN” appears at the channel comment indicator
during Normal scan.
• When a signal is detected, scan pauses until the signal disap-
pears or resumes after pausing 5 sec. according to Set mode
setting. (Channel 16 is still monitored during Priority scan.)
• Rotate [DIAL] to check the scanning TAG channels, to change
the scanning direction or resume the scan manually.
• A beep tone sounds and “1166” blinks at the channel comment in-
dicator when a signal is received on Channel 16 during Priority
scan.
Push
Scan starts. When a signal is received
25W25W INTINT
DUPDUP
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 INTLINTL
BUSYBUSY 25W25W INTINT
DUPDUP
NORMALNORMAL SCANSCAN
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 SAFETYSAFETY
25W25W INTINT
DUPDUP
TAGTAG
NORMALNORMAL SCANSCAN
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00
[Example]: Starting a normal scan.

14
DUALWATCH/TRI-WATCH
5
■Description
Dualwatch monitors Channel 16 while you are receiving
on another channel; Tri-watch monitors Channel 16 and the
call channel while receiving another channel. Dualwatch/Tri-
watch is convenient for monitoring Channel 16 when you are
operating on another channel.
■Operation
qSelect Dualwatch or Tri-watch in Set mode. (p. 56)
wRotate [DIAL] to select the desired operating channel.
ePush [CH/WX•DUAL•U/I/C] for 1 sec. to start Dualwatch
or Tri-watch.
•“
DDUUAALL 1166” appears during Dualwatch; “TTRRII 1166” appears dur-
ing Tri-watch.
• A beep tone sounds when a signal is received on Channel 16.
rTo cancel Dualwatch/Tri-watch, push [CH/WX•DUAL•U/I/C]
again.
DUALWATCH/TRI-WATCH SIMULATION
• If a signal is received on Channel 16, Dualwatch/Tri-watch
pauses on Channel 16 until the signal disappears.
• If a signal is received on the call channel during Tri-watch,
Tri-watch becomes Dualwatch until the signal disappears.
• To transmit on the selected channel during Dualwatch/Tri-
watch, push and hold [PTT].
Dualwatch Tri-watch
Call channel
[Example]: Operating Tri-watch on INT Channel 25
25W25W INTINT
DUPDUP
TRITRI 1616
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 TELEPHONETELEPHONE
BUSYBUSY 25W25W INTINT CALLCALL
TAGTAG
TRITRI 1616
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 CALLINGCALLING
Tri-watch starts. Signal is received on call
channel.
BUSYBUSY 25W25W INTINT
DUPDUP
TRITRI 1616
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 TELEPHONETELEPHONE
Signal received on Channel
16 takes priority.
25W25W INTINT
DUPDUP
TRITRI 1616
44°4.506N4.506N
1212 °2 .2 6W2 .2 6W
UTCUTC 1212:00:00 TELEPHONETELEPHONE
Tri-watch resumes after the
signal disappears.