ICOM orporated 269700 VHF Marine Transceiver User Manual

ICOM Incorporated VHF Marine Transceiver Users Manual

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Users Manual

INSTRUCTION MANUAL

iM502A

VHF MARINE TRANSCEIVER

FOREWORD

Thank you for purchasing this Icom product. The IC-

M502A V

HF MARINE TRANSCEIVER

is designed and built

with Icom’s state of the art technology and craftsman-

ship. 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-M502A your radio of

choice, and hope you agree with Icom’s philosophy of

“technology ﬁrst.” Many hours of research and devel-

opment went into the design of your IC-M502A.

FEATURES

❍Standard 4

″×

″

ﬂush mount design

❍Built-in DSC meets RTCM SC101 require-

ment

❍Rugged waterproof construction

❍NMEA Input/Output

❍Optional COMMANDMIC®is connectable

Icom, Icom Inc. and the logo are registered trademarks

of Icom Incorporated (Japan) in the United states, the United

Kingdom, Germany, France, Spain, Russia and/or other coun-

tries. COMMANDMIC is a registered trademark of Icom

Incorporated (Japan) in the United states.

IMPORTANT

READ THIS INSTRUCTION MANUAL

CAREFULLY before attempting to operate the trans-

ceiver.

SAVE THIS INSTRUCTION MANUAL. This

manual contains important safety and operating in-

structions for the IC-M502A.

CLEAN THE TRANSCEIVER AND MICROPHONE

THOROUGHLY WITH FRESH WATER after exposure to

water including salt water, otherwise, the keys and

switches may become inoperable due to salt crystallization.

IN CASE OF EMERGENCY

If your vessel requires assistance, contact other vessels and

the Coast Guard by sending a distress call on Ch 16.

Or, transmit your distress call using digital selective calling on

Ch 70.

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 vessel (AND 9-

digit DSC ID if you have one).

4. “LOCATED AT ...............” (your position)

5. The nature of the distress and assistance required.

6. Any other information which might facilitate the rescue.

USING DIGITAL SELECTIVE CALLING (Ch 70)

DISTRESS CALL PROCEDURE

1. While lifting up the switch cover, push and hold

[

[DISTRESS

DISTRESS]

]for 5 sec. until you hear 5 short beeps

change to one long beep.

2. Wait for an acknowledgment from a coast station.

• Channel 16 is automatically selected.

3. Push and hold [

[PTT

PTT]

], then transmit the appropriate

information as at above.

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. (p. 42)

EXAMPLE

iii

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 esti-

mated to meet all RF exposure compliance requirements. This

5 meter distance is based on the FCC Safe Maximum Per-

missible 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.

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.

RADIO OPERATOR WARNING

WARNING

FOREWORD ............................................. i

IMPORTANT .............................................. i

IN CASE OF EMERGENCY ...................... ii

NOTE ........................................................ ii

RADIO OPERATOR WARNING ............... iii

TABLE OF CONTENTS ........................... iv

PRECAUTION .......................................... v

EXPLICIT DEFINITIONS .......................... v

1 OPERATING RULES .................. 1

2 PANEL DESCRIPTION........... 2 – 5

■Front panel ..................................... 2

■Function display .............................. 4

■Microphone...................................... 5

3 BASIC OPERATION ............ 6 – 10

■Channel selection ........................... 6

■Receiving and transmitting ............. 8

■Call channel programming .............. 9

■Channel comments ......................... 9

■

Optional Voice scrambler operation .. 10

DUALWATCH/TRI-WATCH

......... 11

■Description .................................... 11

■Operation ...................................... 11

5 SCAN OPERATION ........... 12 – 13

■Scan types .................................... 12

■Setting tag channels ..................... 13

■Starting a scan .............................. 13

6 DSC OPERATION .............. 14 – 35

■MMSI code programming ............. 14

■DSC individual ID ......................... 14

■Position and Time programming ... 16

■Position/Time indication ................ 17

■Distress call .................................. 18

■Transmitting DSC calls ................. 21

■Receiving DSC calls ..................... 29

■Received messages ..................... 32

■DSC Set mode .............................. 34

7 OTHER FUNCTIONS .......... 36–37

■Intercom operation ........................ 36

■Microphone lock function .............. 37

8 SET MODE ........................ 38– 41

■Set mode programming ................ 38

■Set mode items ............................. 39

9 CONNECTIONS AND

MAINTENANCE ................. 42 – 47

■Supplied accessories .................... 42

■Antenna ........................................ 42

■Fuse replacement ......................... 42

■Cleaning ....................................... 42

■Connections .................................. 43

■Mounting the transceiver .............. 44

■Optional unit installation ............... 46

■Dimensions ................................... 47

10 TROUBLESHOOTING .............. 48

11 CHANNEL LIST ........................ 49

12 SPECIFICATIONS AND

OPTIONS ........................... 50 – 51

■Speciﬁcations ............................... 50

■Options ......................................... 51

13 HM-127 REMOTE-CONTROL

MICROPHONE ................... 52 – 66

■Panel description .......................... 52

■Function display ............................ 54

■Channel selection ......................... 56

■Receiving and transmitting ........... 57

■Lock functions ............................... 58

■Display backlighting ...................... 58

■Monitor function ............................ 59

■RF attenuator function .................. 59

■Call channel programming ............ 59

■

Optional Voice scrambler operation .. 60

■Dualwatch/Tri-watch operation ..... 60

■Starting a scan .............................. 61

■Setting tag channels ..................... 61

■Set mode programming ................ 62

■Intercom operation ........................ 63

■Channel comments ....................... 63

■HM-127 supplied accessories ...... 64

■Installation .................................... 65

TEMPLATE

TABLE OF CONTENTS 1

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 and

fuse holder. If an incorrect connection is made after cutting,

the transceiver may be damaged.

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.

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 optional HM-127 em-

ploy waterproof construction, which corresponds to JIS wa-

terproof speciﬁcation, Grade 7 (1 m/30 min.). However, once

the transceiver or microphone has been dropped, water-

prooﬁng cannot be guaranteed due to the fact that the case

may be cracked, or the waterproof seal damaged, etc.

EXPLICIT DEFINITIONS

WORD DEFINITION

RRWARNING Personal injury, fire hazard or electric

shock may occur.

CAUTION Equipment damage may occur.

NOTE

If disregarded, inconvenience only. No

risk or personal injury, fire or electric

shock.

PRECAUTION

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 terminal,

or required to carry a marine radio under any other regula-

tion must still carry an FCC ship station license. For further

information, see the FCC Ship Radio Stations Fact Sheet.

PANEL DESCRIPTION

■Front panel

WATERPROOF

SCAN

TAG

DSC/ENT

POS

HI/LO

POWER

VOL

iM502

VHF MARINE

SQL

LO/DX

IC SCR

CH/WX

DW U/I/C 916

DISTRESS

Speaker

Function

display

qwe r t y u

io!0!1

qVOLUME CONTROL [

[VOL

VOL]

](p. 8)

Adjusts the audio level.

wPOWER KEY [

[POWER

POWER]

]

Push to turn the transceiver power ON or OFF.

eSQUELCH CONTROL [

[SQL

SQL]

](p. 8)

Sets the squelch threshold level.

rTRANSMIT POWER KEY [

[HI/LO

HI/LO]

]

➥Toggles power high or low when pushed. (p. 8)

• Some channels are set to low power only.

➥While pushing this key, some keys perform secondary

functions.

tCHANNEL SELECTOR [

[CHANNEL

CHANNEL]

]

➥Rotate [

[CHANNEL

CHANNEL]

]to select the operating channels,

Set mode settings, etc. (pgs. 8, 38)

➥While pushing [

[HI/LO

HI/LO]

], rotate [

[CHANNEL

CHANNEL]

]to adjust

the brightness of the LCD and key backlight. (p. 37)

yATTENUATOR/INTERCOM/SCRAMBLER KEY

[

[LO/DX

LO/DX]

](

(SCR)

SCR)

➥Toggles the Attenuator function ON or OFF when

pushed momentarily. (p. 8)

•“LOCAL” appears when the Attenuator is in use. The order of

indication precedence is “SP OFF,” “LOCAL” and “CALL.”

➥Activates an optional Intercom function when pushed for

1 sec. (p. 36)

➥Calls optional HM-127 REMOTE-CONTROL MICROPHONE

when pushed and held while in Intercom mode. (p. 36)

➥While pushing [

[HI/LO

HI/LO]

], activates an optional Voice

scrambler function. (p. 10)

•The optional Voice scrambler function cannot be used on

Channel 16 and 70.

uCHANNEL 16/CALL CHANNEL KEY [

]

➥Selects Channel 16 when pushed. (p. 6)

➥Selects call channel when pushed for 1 sec. (p. 6)

•“CALL” appears when call channel is selected. “SP OFF”

and “LOCAL” indications have priority.

➥Push for 3 sec. to enter call channel programming con-

dition when call channel is selected. (p. 9)

➥While pushing [

[HI/LO

HI/LO]

], enters channel comments pro-

gramming condition. (p. 9)

➥Enters Set mode when pushed while turning power ON.

(p. 38)

iDISTRESS KEY [

[DISTRESS

DISTRESS]

]

Transmits Distress call when pushed for 5 sec. (p. 18)

oCHANNEL/DUALWATCH/TRI-WATCH KEY

[

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C)

➥Selects and toggles the regular channels and weather

channel when pushed momentarily. (p. 7)

➥While pushing [

[HI/LO

HI/LO]

], selects one of 3 regular chan-

nels in sequence when pushed. (p. 7)

•International, U.S.A. and Canadian channels are available for

regular channels.

➥Starts Dualwatch or Tri-watch when pushed for 1 sec.

(p. 11)

➥Stops Dualwatch or Tri-watch when either is activated.

!0 SCAN KEY [

[SCAN

SCAN]

](

()

)(p. 13)

➥Starts and stops Normal or Priority scan when tag

(scanned) channels are programmed.

➥Push [

[SCAN

SCAN]

](

()

)for 1 sec. to set or cancel the dis-

played channel as a tag (scanned) channel.

➥While pushing [

[HI/LO

HI/LO]

], push for 3 sec. to clear or set

all tag channels.

!1 DSC/POSITION KEY [

[DSC/ENT

DSC/ENT]

](

()

)

➥Selects the DSC menu when pushed. (p. 14)

➥Shows current position and time from a GPS receiver,

etc. when pushed for 1 sec. (p. 17)

POS

TAG

PANEL DESCRIPTION

■Function display

qBUSY/TRANSMIT INDICATOR (p. 8)

➥“BUSY” appears when receiving a signal or when the

squelch opens.

➥“TX” appears while transmitting.

wPOWER INDICATOR (p. 8)

➥“25W” appears when high power is selected.

➥“1W” appears when low power is selected.

eTAG CHANNEL INDICATOR (p. 13)

Appears when a tag channel is selected.

rCHANNEL COMMENT INDICATOR

➥Channel comment appears if programmed. (p. 9)

➥“Low Battery” blinks when the battery voltage

drops to approx. 10 V DC or below.

➥“DUAL” appears during Dualwatch; “TRI” appears dur-

ing Tri-watch. (p. 11)

tSCRAMBLER INDICATOR (p. 10)

Appears when an optional Voice scrambler is activated.

INT

CALL

BUSY

25W

TAG SC DUP

CALLING

tuy

PANEL DESCRIPTION

yDUPLEX INDICATOR (p. 7)

Appears when a duplex channel is selected.

• Duplex channel has a different TX and RX frequency.

uCHANNEL NUMBER READOUT

➥Indicates the selected operating channel number.

“A” appears when a simplex channel is selected. “b” ap-

pears when a receive only channel for a Canadian chan-

nel group is selected. (p. 7)

➥In Set mode, indicates the selected condition. (p. 38)

iCHANNEL GROUP INDICATOR (p. 7)

Indicates whether an International “INT,” U.S.A. “USA,”

Canadian “CAN” or weather “WEATHER” channel is se-

lected.

oCALL CHANNEL INDICATOR

➥“CALL” appears when call channel is selected. (p. 6)

➥“SP OFF” appears when the internal speaker is turned

OFF in Set mode. (p. 40)

➥“LOCAL” appears when the Attenuator is in use. (p. 8)

•The order of indication precedence is “SP OFF,” “LOCAL”

and “CALL.”

■Microphone

qPTT SWITCH [

[PTT

PTT]

](p. 8)

Push and hold to transmit; release to receive.

wCHANNEL UP/DOWN KEYS [

[YY

YY]

]/[

[ZZ

ZZ]

](pgs. 8, 38)

Push either key to change the operating channel, Set

mode settings, etc.

eCHANNEL 16/CALL CHANNEL KEY [

[16/9

16/9]

]

➥Push to select Channel 16; push for 1 sec. to select call

channel (default is Channel 9). (p. 6)

➥While pushing [

[16/9

16/9]

], turn power ON to toggle the Lock

function ON or OFF. (p. 37)

Speaker

Microphone

3BASIC OPERATION

■Channel selection

DDChannel 16

Channel 16 is the distress and safety channel. It is used for

establishing initial contact with another station and for emer-

gency communications. Channel 16 is monitored during both

Dualwatch and Tri-watch. While standing by, you must moni-

tor Channel 16.

➥Push [

]momentarily to select Channel 16.

➥Push [

[CH/WX

CH/WX]

]to return to the condition before selecting

Channel 16, or rotate [

[CHANNEL

CHANNEL]

]to select an operating

channel.

DDChannel 9 (Call channel)

Each regular channel group has a separate leisure-use call

channel. Call channel is monitored during Tri-watch. Call

channels can be programmed (p. 9) and are used to store

your most often used channels in each channel group for

quick recall.

➥Push [

]for 1 sec. to select 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.

➥Push [

[CH/WX

CH/WX]

]to return to the condition before selecting

call channel,or rotate [

[CHANNEL

CHANNEL]

]to select an operating

channel.

Convenient: Using microphone

➥Push [

[16/9

16/9]

]momentarily to select Channel 16.

➥Push [

[16/9

16/9]

]for 1 sec. to select call channel.

➥Push [

[YY

YY]

]/[

[ZZ

ZZ]

]to select any other operating channel.

Push for

1 sec.

INT

25W CALL

TAG

CALLING

916

INT

25W

TAG

CALLING

Push 916

BASIC OPERATION

DDU.S.A., Canadian and International channels

There are 57 U.S.A., 61 Canadian and 57 International chan-

nels. These channel groups may be speciﬁed for the operat-

ing area.

qPush [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) to select a regular channel.

• If a weather channel appears, push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) again.

wWhile pushing [

[HI/LO

HI/LO]

], push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) to

change the channel group, if necessary.

•U.S.A., International (INT) and Canadian channels can be se-

lected in sequence.

eRotate [

[CHANNEL

CHANNEL]

]to select a channel.

•“DUP” appears for duplex channels.

•“A” appears when a simplex channel is selected. “b” appears

when a receive only channel for a Canadian channel group is se-

lected.

DDWeather channels

There are 10 weather channels. Used for monitoring weather

channels from the NOAA (National Oceanographic and At-

mospheric Administration) broadcasts.

The transceiver can detect a Weather alert tone on the se-

lected weather channel while receiving that channel, during

standby on a regular channel or while scanning. See

“Weather alert” on p. 39.

qPush [

[CH/WX

CH/WX]

]once or twice to select a weather channel.

•“WEATHER” appears when a weather channel is selected.

• “WX ALT” appears when the Weather alert function is in use.

(p. 39)

wRotate [

[CHANNEL

CHANNEL]

]to select a channel.

Push once

or twice When Weather alert is OFF.

WEATHER

When Weather alert is ON.

WXALT

CH/WX

DW U/I/C

Push +

U.S.A. channels

HI/LO CH/WX

DW U/I/C

Canadian channels

CAN

International channels

INT

DUP

USA

■Receiving and transmitting

CAUTION: Transmitting without an antenna may dam-

age the transceiver.

qPush [

[POWER

POWER]

]to turn power ON.

wSet the audio and squelch levels.

➥Rotate [

[SQL

SQL]

]fully counterclockwise in advance.

➥Rotate [

[VOL

VOL]

]to adjust the audio output level.

➥Rotate [

[SQL

SQL]

]clockwise until the noise disappears.

eTo change the channel group, push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C)

while pushing [

[HI/LO

HI/LO]

]. (p. 7)

rRotate [

[CHANNEL

CHANNEL]

]or push [

[YY

YY]

]/[

[ZZ

ZZ]

]on the microphone

to select the desired channel.

• When receiving a signal, “BUSY” appears and audio is emitted

from the speaker.

• Further adjustment of [

[VOL

VOL]

]may be necessary.

• Use the optional Voice scrambler function for privacy. (p. 10)

tPush [

[LO/DX

LO/DX]

]to turn the receive Attenuator function ON

or OFF, if necessary.

•“LOCAL” appears when the receive Attenuator is in use.

yPush [

[HI/LO

HI/LO]

]to select the output power, if necessary.

•“25W” or “1W” 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 selecting low power only.

uPush and hold [

[PTT

PTT]

]to transmit, then speak into

∗

(Mi-

crophone).

•“TX” appears.

• Channel 70 cannot be used for transmission other than DSC.

Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83

CANNOT be lawfully used by the general public in

U.S.A. waters.

iRelease [

[PTT

PTT]

]to receive.

IMPORTANT: To maximize the readability of your trans-

mitted signal, pause a few sec. after pushing [

[PTT

PTT]

], hold

the microphone 2 to 4 inches (5 to 10 cm) from your mouth

and speak into

∗

(Microphone) at a normal voice level.

WATERPROOF

SCAN

TAG

DSC/ENT

POS

HI/LO

POWER

VOL

iM502

VHF MARINE

SQL

LO/DX

IC SCR

CH/WX

DW U/I/C 916

DISTRESS

∗

(Microphone)

rrt

yui

3BASIC OPERATION

BASIC OPERATION

■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 [

[HI/LO

HI/LO]

], push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) one or

more times to select the desired channel group (U.S.A., In-

ternational, Canada) to be programmed.

wPush [

]for 1 sec. to select call channel of the se-

lected channel group.

•“CALL” and call channel number appear.

• The order of indication precedence is “SP OFF,” “LOCAL” and

“CALL.”

Push [

]again for 3 sec.

(until a long beep changes

to 2 short beeps) to enter

call channel programming

condition.

• Channel number starts blinking.

rRotate [

[CHANNEL

CHANNEL]

]to se-

lect the desired channel.

tPush [

]to program the

displayed channel as call

channel.

• Push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) to cancel.

• The channel number stops blinking.

■Channel comments

Memory channels can be labeled with alphanumeric com-

ments of up to 10 characters each.

Capital letters, small letters, numerals, some symbols (! " #

$ % & ' ( ) * + , - ./ =) and space can be used.

qSelect the desired channel.

• Cancel dualwatch, Tri-watch or scan in advance.

wWhile pushing [

[HI/LO

HI/LO]

], push [

]to edit the channel

comment.

• A cursor appears and blinks.

eSelect the desired character by rotating [

[CHANNEL

CHANNEL]

]or

by pushing [

[YY

YY]

]/[

[ZZ

ZZ]

]on the microphone.

• Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]to move the cursor forward or back-

ward, respectively.

rPush [

]to input and set the comment.

• Push [

[HI/LO

HI/LO]

]to cancel.

• The cursor disappears.

tRepeat steps qto rto program the other channels, if de-

sired.

INT

25W

TAG

äLEASURE

INT

25W CALL

TAG

CALLING

INT

25W CALL

DUPTAG

INTL

3BASIC OPERATION

■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 UT-98 or UT-112 is necessary. See p. 41

for setting the scrambler unit. Ask your dealer for details.

The Scrambler function automatically turns OFF when

Channel 16 or 70 is selected.

Select an operating channel other than Channel 16 or 70.

wWhile pushing [

[HI/LO

HI/LO]

], push [

[LO/DX

LO/DX]

](

(SCR)

SCR) to turn

the optional Scrambler function ON.

•“SC” appears.

eTo turn the Scrambler function OFF, repeat step w.

•“SC” disappears.

DDProgramming scrambler codes

There are 128 or 32 codes (0 to 127 or 1 to 32) available for

programming when the optional UT-98 or UT-112 is installed.

In order to understand one another, all transceivers in your

group must have the same scramble code. This function may

not be available depending on dealer setting.

qTurn power OFF.

wWhile pushing [

], turn power ON to enter Set mode.

eAfter the display appears, release [

rPush [

]one or more times to select the scrambler

code.

•“Scrambler Code” appears.

tRotate [

[CHANNEL

CHANNEL]

]to select the desired scrambler code.

yTurn power OFF, then ON again to exit Set mode.

SetMode

Beep

SetMode

Scrambler

Code

SetMode

Scrambler

Code

Enter Set mode Turn OFF

POWER POWER

916 916

Select code

Push one or

more times.

Set mode Scrambler code item

[Example]: Programming scrambler code 8.

DUALWATCH/TRI-WATCH

■Description

Dualwatch monitors Channel 16 while you are receiving an-

other channel; Tri-watch monitors Channel 16 and call chan-

nel while receiving another channel.

■Operation

qSelect Dualwatch or Tri-watch in Set mode. (p. 39)

wSelect the desired operating channel.

ePush [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) for 1 sec. to start Dualwatch or

Tri-watch.

•“DUAL” appears during Dualwatch; “TRI” appears during Tri-

watch.

• A beep tone sounds when a signal is received on Channel 16.

To cancel Dualwatch or Tri-watch, push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C)

again.

[Example]: Operating Tri-watch on INT Channel 25.

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 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

PTT]

Dualwatch Tri-watch

Call channel

INT

25W

DUP

16

TAG

TRI

INT

25W

DUP

16

TAG

TRI

BUSY INT

25W CALL

16

TAG

TRI

BUSY INT

25W

DUP

16

TAG

TRI

Tri-watch starts.

Signal is received

on call channel.

Signal received on

Channel 16 takes

priority.

Tri-watch resumes

after the signal

disappears.

5SCAN OPERATION

■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 in use, the selected

weather channel is checked while scanning. (p. 39)

Set the tag channels (scanned channel) before scanning.

Clear the tag channels which inconveniently stop scanning,

such as those for digital communication use.

Choose Priority or Normal scan in Set mode. (p. 39)

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

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

SCAN OPERATION

INT

25W

DUPTAG

INTL

INT

25W

DUPTAG

Normalscan

BUSY INT

25W

DUPTAG

Normalscan

SCAN

TAG

Push

Scan starts. When a signal is received

[Example]: Starting a Normal scan.

■Setting tag channels

For more efficient scanning, add desired channels as tag

channels or clear tag channels for unwanted channels. Chan-

nels not tagged will be skipped during scanning. Tag chan-

nels can be assigned to each channel group (U.S.A., Interna-

tional, Canada) independently.

qWhile pushing [

[HI/LO

HI/LO]

], push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) one or

more times to select the desired channel group.

wSelect the desired channel to be set as a tag channel.

ePush [

[SCAN

SCAN]

](

()

)for 1 sec. to set the displayed channel

as a tag channel.

•“TAG” appears in the display.

rTo cancel the tag channel setting, repeat step e.

•“TAG” disappears.

Convenient: Clearing (setting) all tagged channels

➥While pushing [

[HI/LO

HI/LO]

], push [

[SCAN

SCAN]

](

()

)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. 39)

qSet tag channels as described at left.

wMake sure the squelch is closed to start a scan.

eWhile pushing [

[HI/LO

HI/LO]

], push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) one or

more times to select the channel group, if desired.

Push

[

[SCAN

SCAN]

]

to start Priority or Normal scan.

•“Pri Scan 16” or “Normal Scan” appears in the function

display.

•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 [

[CHANNEL

CHANNEL]

]to check the scanning tag channels, to

change the scanning direction or resume the scan manually.

•“16” blinks and a beep tone sounds when a signal is received

on Channel 16 during Priority scan.

tTo stop the scan, push [

[SCAN

SCAN]

TAG

6DSC OPERATION

■MMSI code programming

The 9-digit MMSI (Maritime Mobile Service Identity: DSC self

ID) code can be programmed at power ON.

This function is not available when the MMSI code has

been programmed by the dealer. This code programming

can be performed only twice.

qTurn power OFF.

wWhile pushing [

[DSC/ENT

DSC/ENT]

], turn power ON to enter MMSI

code programming condition.

eAfter the display appears, release [

[DSC/ENT

DSC/ENT]

rEdit the speciﬁc MMSI code by rotating [

[CHANNEL

CHANNEL]

• Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]to move the cursor forward or back-

ward, respectively.

tInput the 9 digit codes, then push [

[DSC/ENT

DSC/ENT]

]to set the

code.

• Returns to the normal operation.

■DSC individual ID

A total of 40 DSC address IDs can be programmed and

named with up to 10 characters.

DDProgramming Address ID/Group ID

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “Set up,” push

[

[DSC/ENT

DSC/ENT]

Rotate

[

[CHANNEL

CHANNEL]

]

to select “Add ID,” push

[

[DSC/ENT

DSC/ENT]

]

Setup

˘AddID

DeleteID

OffsetTime

SelItem

POSReport

DTRSSet

˘Setup

SetMMSI

ä23456789

DSC OPERATION

rSet the individual ID and ID name.

• Edit the 9 digits of the appropriate distress ID by using [

[CHAN

CHAN-

NEL

NEL]

-Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]to move the cursor forward or

backward, respectively.

1st digit ‘0’ is fixed for a group ID. Thus an address ID input

cannot start with ‘0.’ When you input 1st digit ‘0’ and other 8

digits, the ID is automatically registered as a group ID.

tPush [

[DSC/ENT

DSC/ENT]

]to program and exit the condition to the

normal operation.

DDDeleting Address ID/Group ID

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “Set up,” push

[

[DSC/ENT

DSC/ENT]

eRotate [

[CHANNEL

CHANNEL]

]to select “Delete ID,” push

[

[DSC/ENT

DSC/ENT]

•When no address ID is programmed, the transceiver exits the

DSC menu automatically.

rRotate [

[CHANNEL

CHANNEL]

]to select the desired ID name for

deleting.

tThe delete confirmation display will appear when

[

[DSC/ENT

DSC/ENT]

]is pushed.

• Push [

[HI/LO

HI/LO]

]to delete ID and exit the DSC Menu.

• Push [

[DSC/ENT

DSC/ENT]

]to cancel deleting and exit the DSC Menu.

DeleteID

Ricky

˘Bill

Tom

Setup

AddID

˘DeleteID

OffsetTime

AddID

ID:

NAME:

6DSC OPERATION

■

Position and Time programming

A distress call should include the ship’s position and time. If

no GPS is connected, your position and UTC (Universal Time

Coordinated) time should be input manually. They are in-

cluded automatically when a GPS receiver (NMEA0183 ver.

2.0 or 3.01) is connected.

This manual programming is not available when a GPS re-

ceiver (NMEA0183 ver. 2.0 or 3.01) is connected.

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

“POS Input” is selected automatically, push [

[DSC/ENT

DSC/ENT]

eEdit the digit of your latitude data by using [

[CHANNEL

CHANNEL]

• Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]to move the cursor forward or back-

ward, respectively.

• After editing latitude data, select “N”; North latitude or “S”; South

latitude.

• Push [

[HI/LO

HI/LO]

]to clear the position data.

Edit the digit of your longitude data by using

[

[CHANNEL

CHANNEL]

]

• Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

•After editing longitude data, select “E”; East longitude or “W”;

West longitude.

• Push [

[HI/LO

HI/LO]

]to clear the position data.

tPush [

[DSC/ENT

DSC/ENT]

]to set the position and advance to the

time setting condition.

•Push [

]or [

[LO/DX

LO/DX]

]to abandon the setting and exit the

DSC menu.

yEdit the digit of the current UTC time by using [

[CHAN

CHAN-

NEL

NEL]

• Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

• Push [

[HI/LO

HI/LO]

]to clear the time data.

uPush [

[DSC/ENT

DSC/ENT]

]to set the time, and exit the DSC menu.

•Push [

]or [

[LO/DX

LO/DX]

]to abandon the setting and exit the

DSC menu.

Inputtime

UTC:

Null˘[H/L]

InputPOS

°.

-°.

Null˘[H/L]

DSC OPERATION

■Position/Time indication

When a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is con-

nected, the transceiver displays the current position and time.

When no GPS receiver is connected, the transceiver displays

the manually entered position and time.

A GPS receiver appropriate for the IC-M502A is not supplied

from Icom. A GPS receiver with NMEA0183 ver. 2.0 or 3.01

format is required for position indication. Ask your dealer

about suitable GPS receivers.

➥Push [

[DSC/ENT

DSC/ENT]

](

()

)for 1 sec. to display the current po-

sition and time.

•“MNL” (manual) appears instead of the “GPS” indication when

no GPS is connected and the position/time data is entered man-

ually.

➥When connecting GPS receiver is compatible several

sentence formatteres, the order of input precedence is

‘RMC,’ ‘GGA,’ ‘GNS’ and ‘GLL.’

➥When sentence formatter ‘RMC’ is received, time indi-

cation includes a date, and UTC time only.

➥“??” may blink instead of position and time indications

when the GPS data is invalid, or has not been manually

updated after 4 hours.

34°34.123N

135°34.123E

JUL1711:47

CALLING

34°34.123N

135°34.123E

GPSUTC11:47

CALLING

34°34.123N

135°34.123E

GPSLOC01:47

CALLING

• Sentence formatter ‘RMC’

• Sentence formatteres ‘GGA,’ ‘GNS,’ ‘GLL’

No offset time Offset time is

–10 hours. (p.34)

34°34.123N

135°34.123E

GPSUTC12:34

CALLING

POS

6DSC OPERATION

■Distress call

A Distress call should be transmitted, if in the opinion of the

Master, the ship or a person is in distress and requires imme-

diate assistance.

NEVER USE THE DISTRESS CALL WHEN

YOUR SHIP IS NOT IN AN EMERGENCY. A

DISTRESS CALL CAN BE USED ONLY WHEN

IMMEDIATE HELP IS NEEDED.

DDSimple call

qConﬁrm no Distress call is being received.

wWhile lifting up the switch cover, push [

[DISTRESS

DISTRESS]

]for 5

sec. to transmit the Distress call.

•Emergency channel (Ch 70) is automatically selected and the

Distress call is transmitted.

• When no GPS is connected, input your position and UTC time, if

possible.

eAfter transmitting the call, the transceiver waits for an ac-

knowledgment call on Ch 70.

•The Distress call is automatically transmitted every 3.5 to 4.5

minutes.

rAfter receiving the acknowledgment, reply using the mi-

crophone.

➥A distress alert contains (default);

• Kind of distress : Undesignated distress

• Position data : GPS or manual input position data held for

23.5 hrs or until the power is turned OFF.

➥The Distress call is repeated every 3.5–4.5 min., until re-

ceiving an ‘acknowledgement.’

➥Push [

[DISTRESS

DISTRESS]

]to transmit a renewed Distress call,

if required.

➥Push any key (except [

[DISTRESS

DISTRESS]

]) to cancel the ‘Call

repeat’ mode.

➥“??” may blink instead of position and time indications

when the GPS data is invalid, or has not been manually

updated after 4 hours.

<TokyoCG

DistressACK

Received

Distress

Completed

WaitforACK

DistressTX

35°23.123N

135°35.123E

GPSUTC12:34

DSC OPERATION

DDNormal call

The nature of the Distress call should be included in the Dis-

tress call.

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “DTRS Set,” push

[

[DSC/ENT

DSC/ENT]

eRotate [

[CHANNEL

CHANNEL]

]to select the nature of the distress,

push [

[DSC/ENT

DSC/ENT]

•‘Undesignated,’ ‘Explosion,’ ‘Flooding,’ ‘Collision,’ ‘Grounding,’

‘Capsizing,’ ‘Sinking,’ ‘Adrift (Disable adrift),’ ‘Abandoning (Aban-

doning ship),’ ‘Piracy (Piracy attack)’ and ‘MOB (Man overboard)’

are available.

• The selected nature of the distress is stored for 10 minutes after

programming is ﬁnished.

When a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is con-

nected,

next steps r, t(

Current position/time program-

ming) do not appear. Go to step y. (next page)

SelNature

˘Explosion

Undesign

Flooding

SelItem

POSReport

RCVCalls

˘DTRSSet

rThe position information appears. Set the current posi-

tion, push [

[DSC/ENT

DSC/ENT]

• Edit the digit of your position data by using [

[CHANNEL

CHANNEL]

-Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

-After editing latitude data, select “N”; North latitude or “S”;

South latitude.

-After editing longitude data, select “E”; East longitude or “W”;

West longitude.

- Push [

[HI/LO

HI/LO]

]to clear the position data.

tThe time information appears. Set the current UTC time,

push [

[DSC/ENT

DSC/ENT]

• Edit the digit of the current UTC time by using [

[CHANNEL

CHANNEL]

-Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

- Push [

[HI/LO

HI/LO]

]to clear the time data.

Inputtime

UTC:

Null˘[H/L]

InputPOS

°.

-°.

Null˘[H/L]

6DSC OPERATION

yPush [

[DISTRESS

DISTRESS]

]for 5 sec. to transmit the Distress call.

uAfter transmitting the call, the transceiver waits for an ac-

knowledgment call on Ch 70.

•The Distress call is automatically transmitted every 3.5 to 4.5

minutes.

iAfter receiving the acknowledgment, reply using the mi-

crophone.

➥A distress alert contains;

• Kind of distress : Selected nature of the distress.

• Position data: GPS or manual input position data held for 23.5

hrs or until the power is turned OFF.

➥The Distress call is repeated every 3.5–4.5 min., until re-

ceiving an ‘acknowledgement.’

➥Push [

[DISTRESS

DISTRESS]

]to transmit a renewed Distress call,

if required.

➥Push any key (except [

[DISTRESS

DISTRESS]

]) to cancel the ‘Call

repeat’ mode.

➥“??” may blink instead of position and time indications

when the GPS data is invalid, or has not been manually

updated after 4 hours.

<TokyoCG

DistressACK

Received

Distress

Completed

WaitforACK

SetisOK

Push[DTRS]

for5sec

DSC OPERATION

■Transmitting DSC calls

DDTransmitting Individual call

The Individual call function allows you to transmit a DSC sig-

nal to a speciﬁc ship only.

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “Individual,” push

[

[DSC/ENT

DSC/ENT]

Rotate

[

[CHANNEL

CHANNEL]

]

to select the desired pre-programmed

individual address or “Manual Input,” push

[

[DSC/ENT

DSC/ENT]

]

• The ID code for the Individual call can be set in advance. (p. 14)

•When “Manual Input” is selected, set the 9-digit ID code

(1st digit must not be ‘0’) for the individual you wish to call by

using [

[CHANNEL

CHANNEL]

-Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

- After 9-digit is input, push [

[DSC/ENT

DSC/ENT]

]to set the ID code.

rRotate [

[CHANNEL

CHANNEL]

]to select a desired intership channel

or “Manual Input,” push [

[DSC/ENT

DSC/ENT]

•When “Manual Input” is selected, rotate

[

[CHANNEL

CHANNEL]

]

select the desired channel other than Channel 70, push

[

[DSC/ENT

DSC/ENT]

]

tPush [

[DSC/ENT

DSC/ENT]

]to transmit the Individual call.

• If Channel 70 is busy, the transceiver stands by until the channel

becomes clear.

ToCall,

ToCancel

[other]

[DSC/ENT]

Individual

ToCancel

[other]

Ch70isBUSY

Push [DSC/ENT] to transmit DSC call.

When Ch 70 is busy.

SelChannel

69

˘08

77

SelAddress

Ricky

ManualSet

˘Tom

˘Individual

POSInput

Group

SelItem

6DSC OPERATION

yAfter transmitting the Individual call, standby on Channel

70 until an acknowledgement is received.

uWhen the acknowledgement is received, the display

changes to the previously selected channel with beeps.

iPush and hold [

[PTT

PTT]

]to communicate your message to

the responding ship.

DDTransmitting Individual acknowledgement

Transmit an acknowledgement (‘able to comply’ or ‘unable to

comply’) when an Individual call for you is received.

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “INDV ACK,” push

[

[DSC/ENT

DSC/ENT]

•“INDV ACK” item appears after an Individual call is received.

eRotate [

[CHANNEL

CHANNEL]

]to select the desired individual ad-

dress or ID code, push [

[DSC/ENT

DSC/ENT]

SelAddress

Tom

˘Ricky

SelItem

POS Input

Individual

˘INDVACK

Received

<Tom

AbleACK

Routine

Individual

WaitforACK

Completed

DSC OPERATION

rRotate [

[CHANNEL

CHANNEL]

]to select an acknowledgement

“Able” or “Unable,” push [

[DSC/ENT

DSC/ENT]

tIf you select “Unable,” select the reason by rotating

[

[CHANNEL

CHANNEL]

], push [

[DSC/ENT

DSC/ENT]

• ‘No reason given,’ ‘Congestion,’ ‘Busy,’ ‘Queue indication,’ ‘Sta-

tion Barred,’ ‘No operator,’ ‘Operator Unavailable,’ ‘Equipment

Disable,’ ‘Channel Unable’ and ‘Mode Unable’ are available.

yPush [

[DSC/ENT

DSC/ENT]

]to transmit the acknowledgement to the

selected station.

uAfter the Individual acknowledgement has been transmit-

ted, the display changes to the channel specified by the

calling station, automatically.

INDVACK

Completed

ToCall,

ToCancel

[other]

[DSC/ENT]

SelReason

Congestion

Busy

˘NoReason

Comply

Unable

˘Able

6DSC OPERATION

DDTransmitting Group call

The Group call function allows you to transmit a DSC signal

to a speciﬁc group only.

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “Group,” push

[

[DSC/ENT

DSC/ENT]

eRotate [

[CHANNEL

CHANNEL]

]to select the desired pre-pro-

grammed group address or “Manual Input,” push

[

[DSC/ENT

DSC/ENT]

• The ID code for the Group call can be set in advance. (p. 14)

•When “Manual Input” is selected, set the 9-digit ID code

(must be set to ‘0’) for the group you wish to call by using

[

[CHANNEL

CHANNEL]

-Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

- After 9-digit is input, push [

[DSC/ENT

DSC/ENT]

]to set the ID code.

rRotate [

[CHANNEL

CHANNEL]

]to select a desired intership channel

or “Manual Input,” push [

[DSC/ENT

DSC/ENT]

• When “Manual Input” is selected, rotate [

[CHANNEL

CHANNEL]

]to se-

lect the desired channel other than Channel 70, push [

[DSC/ENT

DSC/ENT]

tPush [

[DSC/ENT

DSC/ENT]

]to transmit the Group call.

• If Channel 70 is busy, the transceiver stands by until the channel

becomes clear.

yAfter the Group call has been transmitted, the display

changes to the previously selected channel.

Push and hold [

[PTT

PTT]

]to communicate your message to the

responding ship or push [

[DSC/ENT

DSC/ENT]

]to exit the condition.

Group

Completed

ToCall,

ToCancel

[other]

[DSC/ENT]

SelChannel

67

13

˘72

SelAddress

Smith Grp

ManualSet

˘Osaka Grp

SelItem

Individual

INDVACK

˘Group

DSC OPERATION

DDTransmitting All Ships call

Large ships use Channel 70 as their ‘listening channel.’ When

you want to announce a message to these ships, use the ‘All

Ships Call’ function.

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “All Ships,” push

[

[DSC/ENT

DSC/ENT]

ePush [

[DSC/ENT

DSC/ENT]

]to transmit the All Ships call.

• Channel 70 is selected and the All Ships call is transmitted.

• Routine category only is available.

rAfter the All Ships call has been transmitted, the display

changes to Channel 16 automatically.

tPush any key to exit the condition and the display returns

to the normal operation.

AllShips

Completed

ToCall,

ToCancel

[other]

[DSC/ENT]

SelItem

INDVACK

Group

˘AllShips

6DSC OPERATION

DDTransmitting Position Request call

Transmit a Position Request call when you want to know a

speciﬁc ship’s current position, etc.

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “POS Request,” push

[

[DSC/ENT

DSC/ENT]

eRotate [

[CHANNEL

CHANNEL]

]to select the desired pre-pro-

grammed individual address or “Manual Input,” push

[

[DSC/ENT

DSC/ENT]

• The ID code for the Position Request call can be set in advance.

(p. 14)

•When “Manual Input” is selected, set the 9-digit ID code

(1st digit must not be ‘0’) for the individual you wish to call by

using [

[CHANNEL

CHANNEL]

-Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

- After 9-digit is input, push [

[DSC/ENT

DSC/ENT]

]to set the ID code.

rPush [

[DSC/ENT

DSC/ENT]

]to transmit the Position Request call.

tAfter the Position Request call has been transmitted, the

following indication is displayed.

yPush any key to exit the condition and return to the normal

operation.

POSREQ

WaitforACK

Completed

ToCall,

ToCancel

[other]

[DSC/ENT]

SelAddress

Ricky

ManualSet

˘Tom

SelItem

Group

Allships

˘POSRequest

DSC OPERATION

DDTransmitting Position Report call

Transmit a Position Report call when you want to announce

your own position to a speciﬁc ship and to get answer, etc.

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “POS Report,” push

[

[DSC/ENT

DSC/ENT]

eRotate [

[CHANNEL

CHANNEL]

]to select the desired pre-pro-

grammed individual address or “Manual Input,” push

[

[DSC/ENT

DSC/ENT]

• The ID code for the Position Report call can be set in advance.

(p. 14)

•When “Manual Input” is selected, set the 9-digit ID code

(1st digit must not be ‘0’) for the individual you wish to call by

using [

[CHANNEL

CHANNEL]

-Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

- After 9-digit is input, push [

[DSC/ENT

DSC/ENT]

]to set the ID code.

When a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is con-

nected,

next steps r, t(

Current position/time program-

ming) do not appear. Go to step y. (next page)

SelAddress

Ricky

ManualSet

˘Tom

SelItem

Allships

POSRequest

˘POSReport

rThe position information appears. Set the current posi-

tion, push [

[DSC/ENT

DSC/ENT]

• Edit the digit of your position data by using [

[CHANNEL

CHANNEL]

-Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

-After editing latitude data, select “N”; North latitude or “S”;

South latitude.

-After editing longitude data, select “E”; East longitude or “W”;

West longitude.

- Push [

[HI/LO

HI/LO]

]to clear the position data.

tThe time information appears. Set the current UTC time,

push [

[DSC/ENT

DSC/ENT]

• Edit the digit of the current UTC time by using [

[CHANNEL

CHANNEL]

-Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

- Push [

[HI/LO

HI/LO]

]to clear the time data.

Inputtime

UTC:

Null˘[H/L]

InputPOS

°.

-°.

Null˘[H/L]

6DSC OPERATION

yPush [

[DSC/ENT

DSC/ENT]

]to transmit the Position Report call.

uAfter the Position Report call has been transmitted, the fol-

lowing indication is displayed

iPush any key to exit the condition and return to the normal

operation.

DDTransmitting Position Reply call

Transmit a Position Reply call when a Position Request call is

received.

qWhen a Position Request call is received, the following in-

dication is displayed.

wPush [

[DSC/ENT

DSC/ENT]

]to reply to the Position Request call;

push other key to ignore the Position Request call.

DDTransmitting Position Report Reply call

Transmit a Position Report Reply call when a Position Report

call is received.

qWhen a Position Report call is received, the following in-

dication is displayed.

wPush [

[DSC/ENT

DSC/ENT]

]to reply to the Position Report call;

push any key to ignore the Position Report call.

Received

Ans[DSC/ENT]

POSReport

Received

Ans[DSC/ENT]

<Ricky

POSRequest

POSReport

WaitforACK

Completed

ToCall,

ToCancel

[other]

[DSC/ENT]

DSC OPERATION

■Receiving DSC calls

DDReceiving a Distress call

While monitoring Channel 70 and a Distress call is received:

➥The emergency alarm sounds for 2 minutes.

• Push any key to stop the alarm.

➥“Received Distress” appears in the display; then

Channel 16 is automatically selected.

➥Continue monitoring Channel 16 as a coast station may re-

quire assistance.

DDReceiving a Distress acknowledgement

While monitoring Channel 70 and a Distress acknowledge-

ment to other ship is received:

➥The emergency alarm sounds for 2 minutes.

• Push any key to stop the alarm.

➥“Received Distress ACK” appears in the display;

then Channel 16 is automatically selected.

DDReceiving an Individual call

While monitoring Channel 70 and an Individual call is re-

ceived:

➥The emergency alarm or beeps sound depending on the

received category.

➥“Received Individual” appears in the display.

➥Push [

[DSC/ENT

DSC/ENT]

]to change to the channel specified by

the calling station for voice communication; push other key

to ignore the Individual call.

DDReceiving a Group call

While monitoring Channel 70 and a Group call is received:

➥The emergency alarm or beeps sound depending on the

received category.

➥“Received Group” appears in the display.

➥Push [

[DSC/ENT

DSC/ENT]

]to change to the channel specified by

the calling station for voice communication; push other key

to ignore the Group call.

Routine

Group

< Smiths Grp

Received

Routine

Individual

< Tom

Received

<TokyoCG

>111222345

DistressACK

Received

<111222345

Distress

Received

6DSC OPERATION

DDReceiving an All Ships call

While monitoring Channel 70 and an All Ships call is received:

➥Emergency alarm sounds when the category is ‘Distress’

or ‘Urgency’; 3 beeps sound for other categories.

➥“Received All ships” appears in the display.

➥Push [

[DSC/ENT

DSC/ENT]

]to change to the channel specified by

the calling station for voice communication; push other key

to ignore the All Ships call.

➥Monitor the channel for an announcement from the calling

vessel.

DDReceiving a Distress Relay call

While monitoring Channel 70 and a Distress Relay call is re-

ceived:

➥Emergency alarm sounds for 2 minutes.

• Push any key to stop the alarm.

➥“Received Distress RLY” appears in the display;

then, Channel 16 is automatically selected.

➥Monitor Channel 16 until the emergency communication

has been completed.

Receiving a Distress Relay acknowledgement

While monitoring Channel 70 and a Distress Relay acknowl-

edgement is received:

➥Emergency alarm sounds for 2 minutes.

• Push any key to stop the alarm.

➥“Received DTRS RLY ACK” appears in the display;

then, Channel 16 is automatically selected.

DDReceiving a Geographical Area call

While monitoring Channel 70 and a Geographical Area call

(for the area you are in) is received:

➥Emergency alarm or beeps sound depending on the re-

ceived category.

➥“Received Geographic” appears in the display.

➥Push [

[DSC/ENT

DSC/ENT]

]to change to the channel specified by

the calling station for voice communication; push other key

to ignore the Geographical Area call.

➥Monitor the selected channel for an announcement from

the calling station.

When no GPS receiver is connected or if there is a prob-

lem with the connected receiver, all Geographical Area

calls are received, regardless of your position.

Routine

Geographic

<TokyoCG

Received

<Osaka Bay

Routine

AllShips

Received

DSC OPERATION

DDReceiving a Position Request call

While monitoring Channel 70 and a Position Request call is

received:

➥“Received POS Request” appears in the display.

➥Push [

[DSC/ENT

DSC/ENT]

]to reply to the Position Request call;

push other key to ignore the Position Request call.

DDReceiving a Position Reply call

While monitoring Channel 70 and a Position Reply call is re-

ceived:

➥“Received POS” appears in the display.

DDReceiving a Position Report call

While monitoring Channel 70 and a Position Report call is re-

ceived:

➥“Received POS Report” appears in the display.

➥Push [

[DSC/ENT

DSC/ENT]

]to reply to the call; push other key to ig-

nore the Position Report call.

DDReceiving a Position Report Reply call

While monitoring Channel 70 and a Position Report Reply call

is received:

➥“Received POS” appears in the display.

30°30.123N

<Ricky

ReceivedPOS

130°30.123E

POSReport

Received

Ans[DSC/ENT]

34°34.123N

<Tom

ReceivedPOS

135°34.123E

<Ricky

POSRequest

Received

Ans[DSC/ENT]

6DSC OPERATION

■Received messages

The transceiver automatically stores up to 20 distress mes-

sages and 20 other messages. The messages can be used

as an assistance to the logbook.

qPush [

[DSC/ENT

DSC/ENT]

]to select the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “RCV Calls,” push

[

[DSC/ENT

DSC/ENT]

DDDistress message

qRotate [

[CHANNEL

CHANNEL]

]to select “Distress,” push

[

[DSC/ENT

DSC/ENT]

wRotate [

[CHANNEL

CHANNEL]

]to scroll to the desired message,

push [

[DSC/ENT

DSC/ENT]

•When some messages are blinking, the messages have not

been read.

eRotate [

[CHANNEL

CHANNEL]

]to scroll the message.

rPush [

[DSC/ENT

DSC/ENT]

]to exit the DSC menu or push [

[HI/LO

HI/LO]

]

to clear the displayed message and returns to the normal

operation.

ToClear

ThisData

No[DSC/ENT]

Yes[H/L]

Distress

<123123123

Explosion

UTC:12:48

32°43.212N

123°45.221W

ToClear

ThisData

No[DSC/ENT]

Yes[H/L]

SelDTRSMSG

˘123123123

111222345

Chuck 3

SelMessege

˘Distress

Other

SelItem

˘RCVCalls

DTRSSet

Setup

DSC OPERATION

DDOther messages

qRotate [

[CHANNEL

CHANNEL]

]to select “Other,” push

[

[DSC/ENT

DSC/ENT]

wRotate [

[CHANNEL

CHANNEL]

]to scroll to the desired message,

push [

[DSC/ENT

DSC/ENT]

•When some messages are blinking, the messages have not

been read.

eRotate [

[CHANNEL

CHANNEL]

]to scroll the message.

• The stored message has various information and depending on

the type of distress calls.

rPush [

[DSC/ENT

DSC/ENT]

]to exit the DSC menu or push [

[HI/LO

HI/LO]

]

to clear the displayed message and returns to the normal

operation.

ToClear

ThisData

No[DSC/ENT]

Yes[H/L]

AllShips

<Tom

Routine

F3ESimplex

CH08

ToClear

ThisData

No[DSC/ENT]

Yes[H/L]

SelMessege

AllShips

POS Request

˘Individual

SelMessege

Distress

˘Other

6DSC OPERATION

■DSC Set mode

DDAdd Address ID (See p.14 for detail)

DDDelete Address ID (See p.15 for detail)

DDOffset time

This item sets the offset time from the UTC (Universal Time

Coordinated) time.

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “Set up,” push

[

[DSC/ENT

DSC/ENT]

eRotate [

[CHANNEL

CHANNEL]

]to select “Offset time,” push

[

[DSC/ENT

DSC/ENT]

rSet the offset time from the UTC (Universal Time Coordi-

nated) time.

• Edit the digit of offset time by using [

[CHANNEL

CHANNEL]

-Push [

[CH/WX

CH/WX]

]or [

[SCAN

SCAN]

]for cursor movement.

- Push [

[DSC/ENT

DSC/ENT]

]to set the offset time.

• Rotate [

[CHANNEL

CHANNEL]

]to edit or delete “-,” when the cursor is on

the ﬁrst digit.

tPush [

[DSC/ENT

DSC/ENT]

]to program and to exit the DSC menu.

The local time indication is not available when a GPS re-

ceiver (sentence formatter ‘RMC’) is input, the trans-

ceiver’s display indicates UTC time only.

OffsetTime

00:00

OffsetTime

-12:00

No offset time (default) —12 hours

Setup

AddID

DeleteID

˘OffsetTime

SelItem

RCVCalls

DTRSSet

˘Setup

DSC OPERATION

DDMMSI code check

The programmed 9-digit MMSI (DSC self ID) code can be

checked in DSC Set mode.

qPush [

[DSC/ENT

DSC/ENT]

]to enter the DSC menu.

wRotate [

[CHANNEL

CHANNEL]

]to select “Set up,” push

[

[DSC/ENT

DSC/ENT]

eRotate [

[CHANNEL

CHANNEL]

]to select “MMSI Check,” push

[

[DSC/ENT

DSC/ENT]

rCheck the 9-digit MMSI (DSC self ID) code.

tPush [

[DSC/ENT

DSC/ENT]

]to exit the DSC menu.

MMSI Check

123456789

Setup

DeleteID

OffsetTime

˘MMSICheck

SelItem

RCVCalls

DTRSSet

˘Setup

7OTHER FUNCTIONS

■Intercom operation

The optional Intercom function allows you to talk to the deck

from the cabin. The optional HM-127 REMOTE-CONTROL MI-

CROPHONE is required for Intercom operation.

Connect an optional HM-127 as described on pgs. 43, 65.

• Transmitting is impossible during Intercom operation.

• The received signal is muted during Intercom operation.

qPush [

[LO/DX

LO/DX]

](

(SCR)

SCR) for 1 sec. to enter Intercom mode.

• The HM-127 power is automatically turned ON, even if the power

is OFF.

wPush and hold [

[LO/DX

LO/DX]

](

(SCR)

SCR) again to call up.

• The transceiver and microphone emit call beeps.

ePush and hold the PTT switch and speak at a normal voice

level into the microphone.

•“TALK” or “LSTN” appears on the caller or listener function dis-

play, respectively.

• To adjust the IC-M502A’s speaker output level, rotate [

[VOL

VOL]

• To adjust the HM-127’s speaker output level, push after [

[VOL

VOL]

]

pushing [

[YY

YY]

]/[

[ZZ

ZZ]

rAfter releasing the PTT switch you can hear the response

through the speaker.

tTo return to the normal operation, push [

[LO/DX

LO/DX]

](

(SCR)

SCR)

momentarily.

• Other keys also turn the function OFF, however, the correspond-

ing function is then activated (e.g. pushing [

]selects Chan-

nel 16).

•While in the Intercom mode, the transceiver functions

(transmit and receive) are interrupted. If the transceiver is

in transmit condition, the Intercom function is not avail-

able.

•When a DSC call is received, “DSC received” ap-

pears and the last received DSC message is displayed

after the Intercom use is ﬁnished.

•When a WX alert is received, “WX ALT” blinks and a

beep sounds. The WX alert sounds after the Intercom use

is ﬁnished.

Intercom

INT

TALK

IC-M502A (caller) HM-127 (listener)

Intercom

INT

IC-M502A HM-127

OTHER FUNCTIONS

■Microphone lock function

The Microphone lock function electrically locks the [

[YY

YY]

]/[

[ZZ

ZZ]

]

and [

[16/9

16/9]

]keys on the supplied microphone. This prevents

accidental channel changes and accidental function access.

➥While pushing [

[16/9

16/9]

]on supplied microphone, turn power

ON to toggle the Lock function ON or OFF.

■Display backlighting

The function display and keys can be backlit for better visibil-

ity under low light conditions.

➥While pushing [

[HI/LO

HI/LO]

], rotate [

[CHANNEL

CHANNEL]

]to adjust the

brightness of the LCD and key backlight.

• The backlight level is adjustable in 7 levels.

• No backlight level indication is available.

[Y]/[Z][16/9]

8SET MODE

Beep tone

Beep

Scan mode

Scan Mode

Weather alert

WX Alert

Scan resume timer

Scan Timer

Attenuation level

Attenuation

Level

Internal speaker

Internal

Speaker

Scrambler code*

Scrambler

Code

Scrambler type*

Scrambler

Type

Dual/tri watch

DUAL/TRI

DSC watch

DSCWatch

LCD contrast

LCD

Contrast

Automatic acknowledgement

AUTO ACK

Push 916

* The scrambler set items

are only available when a

scrambler unit is installed.

Push when using HM-127

DSC Watch, Internal Speaker

and AUTO ACK items are not selectable

when using HM-127.

■Set mode programming

Set mode is used to change the conditions of the trans-

ceiver’s functions: scan mode (Normal or Priority), scan re-

sume timer, weather alert, Dualwatch/Tri-watch selection,

DSC watch, transceiver’s beep tone (transceiver or HM-127),

internal speaker, LCD contrast (transceiver or HM-127), RF

attenuation level, scrambler code, scrambler type and auto-

matic acknowledgement.

•Available functions may differ depending on dealer set-

ting.

•The optional HM-127 has it’s own settings for the beep

tone and LCD contrast.

qTurn power OFF.

wWhile pushing [

], turn power ON to enter Set mode.

eAfter the display appears, release [

rPush [

]to select the desired item.

Or push [

[]

](

)on the HM-127 to select the item when

using an optional HM-127.

tRotate [

[CHANNEL

CHANNEL]

]to select the desired condition of the

item. Use [

[YY

YY]

]/[

[ZZ

ZZ]

]when using an optional HM-127.

yTurn power OFF, then turn ON again to exit Set mode.

•SET MODE CONSTRUCTION

SET MODE

■Set mode items

DDScan mode

The transceiver has 2 scan modes: Normal scan and Priority

scan. Normal scan searches all tag channels in the selected

channel group. Priority scan searches all tag channels in se-

quence while monitoring Channel 16.

DDScan resume timer

The scan resume timer can be selected as a pause (OFF) or

timer scan (ON). When OFF is selected, the scan pauses

until the signal disappears. When ON is selected, the scan

pauses 5 sec. and resumes even if a signal has been re-

ceived on any other channel than Channel 16.

DDWeather alert

A NOAA broadcast station transmits a Weather alert tone be-

fore important weather information. When the Weather alert

function is turned ON, the transceiver detects the alert tone,

then blinks the “WX ALT” indicator and sounds beep tones

until the transceiver is operated. The previously selected

(used) weather channel is checked any time during standby

or while scanning.

•“WX ALT” appears instead of “WEATHER” indication when the

function is set ON.

DDDual/Tri-watch

This item sets the [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) key function as Dual-

watch or Tri-watch.

SetMode

DUAL/TRI

Dualwatch (default) Tri-watch

SetMode

WXAlert

Weather alert OFF (default) Weather alert ON

SetMode

ScanTimer

Scan timer OFF (default) Scan timer ON

SetMode

ScanMode

Normal scan (default) Priority scan

8SET MODE

DDDSC watch

DSC watch monitors Channel 70 while you are receiving an-

other channel.

If a distress signal is received on Channel 70, the transceiver

monitors Channel 16 and 70 alternately until the distress sig-

nal disappears. If a signal is received on another channel,

DSC watch pauses until the signal disappears.

This function may not be available for some channel

groups depending on dealer setting.

DDBeep tone

You can select silent operation by turning beep tones OFF, or

you can have conﬁrmation beeps sound at the push of a key

by turning beep tones ON.

The optional HM-127 has its own setting for the beep tone.

DDInternal speaker

When an external speaker is connected and the transceiver’s

internal speaker is not required, the speaker on the trans-

ceiver and microphone can be deactivated.

“SP OFF” appears on the function display when the internal

speaker is turned OFF.

•The order of indication precedence is “SP OFF,” “LOCAL” and

“CALL.”

DDLCD contrast

This item adjusts the contrast of the LCD in 8 steps.

The optional HM-127 has its own setting for the LCD con-

trast.

SetMode

LCD

Contrast

LCD contrast 4 (default)

SetMode

Internal

Speaker

Internal speaker ON (default) Internal speaker OFF

SetMode

Beep

Beep tone ON (default) Beep tone OFF

SetMode

DSCwatch

DSC watch OFF (default) DSC watch ON

SET MODE

DDAttenuation level

This item sets the receive attenuation level for the Attenuator

function from 3 levels.

DDScrambler code

(Appears when a scrambler unit is installed)

When an optional scrambler unit is installed, the scrambler

code can be set depending on dealer setting.

When the UT-98 or UT-112 is installed, 128 or 32 codes (0 to

127 or 1 to 32) can be selected.

DDScrambler type

(Appears when a scrambler unit is installed)

When an optional scrambler unit is installed, the scrambler

type can be selected in Set mode depending on dealer set-

ting.

DDAutomatic acknowledgement

This item sets the Automatic acknowledgement function ON

or OFF.

When Position Request or Position Report call is received,

transceiver automatically transmits Position Reply or Position

Report Reply, respectively.

SetMode

AUTOACK

Auto ACK OFF (default) Auto ACK ON

SetMode

Scrambler

Type

UT-112 scrambler unit UT-98 scrambler unit

SetMode

Scrambler

Code

Scrambler code 1 (UT-112 default) Scrambler code 32

SetMode

Attenuation

Level

Attenuation level 1 (default)

■Supplied accessories

The following accessories are supplied: Qty.

qMounting bracket ............................................................ 1

wMicrophone hanger ......................................................... 1

eMic hanger screws (3 ×16) ............................................ 2

rMounting screws (5 ×20) ............................................... 4

tFlat washers (M5) ........................................................... 4

ySpring washers (M5) ...................................................... 4

uKnob bolts for mounting bracket...................................... 2

iDC power cable (OPC-891) ........................................... 1

oWarning sticker ............................................................... 1

!0 RCA connector cable Red (OPC-1278) .......................... 1

!1 RCA connector cable White (OPC-1279) ....................... 1

■Antenna

A key element in the performance of any communication sys-

tem is an antenna. Ask your dealer about antennas and the

best place to mount them.

■Fuse replacement

One fuse is installed in the supplied DC power cable. If a fuse

blows or the transceiver stops functioning, track down the

source of the problem, if possible, and replace the damaged

fuse with a new, rated one.

■Cleaning

If the transceiver becomes dusty or dirty, wipe it clean with a

soft, dry cloth.

AVOID the use of solvents such as benzene or al-

cohol, as they may damage transceiver surfaces.

Fuse rating: 10 A

qw e

WARNING

o!0

9CONNECTIONS AND MAINTENANCE

CONNECTIONS AND MAINTENANCE

■Connections

qDC POWER CONNECTOR

Connects the supplied DC power cable from this connector

to an external 13.8 V DC power source.

wEXTERNAL MICROPHONE JACKS

Connects to optional HM-127 REMOTE-CONTROL MICRO-

PHONE.

CAUTION: NEVER

connect other microphones, such

as the HM-134, as this may cause damage to the transceiver.

eANTENNA CONNECTOR

Connects a marine VHF antenna with a PL-259 connector.

CAUTION: Transmitting without an antenna may dam-

age the transceiver.

rNMEA IN (Red)/NMEA OUT (White) JACKS

Connects to a GPS receiver for position and time indica-

tions.

•An NMEA0183 ver. 2.0 or 3.01 (sentence formatters RMC,

GGA, GNS, GLL) compatible GPS receiver is required. Ask your

dealer about suitable GPS receivers.

Connects to a PC or navigation equipment (NMEA0183

ver. 3.01 sentence formatters DSC, DSE compatible) for

plotting received other ships position data.

tEXTERNAL SPEAKER JACK

➥Connects to an external speaker.

CAUTION: After connecting the DC power cable, NMEA

IN/OUT jacks and external speaker jack cover the connec-

tor and jacks with a rubber vulcanising tape as shown

below, to prevent water seeping into the transceiver.

Rubber vulcanizing

tape

NMEA OUT (+)

RCA

NMEA OUT (–)

NMEA IN (+)

RCA

NMEA IN (–)

9CONNECTIONS AND MAINTENANCE

■Mounting the transceiver

DDUsing the supplied mounting bracket

The universal mounting bracket supplied with your transceiver

allows overhead or onboard mounting.

•Mount the transceiver securely with the 4 supplied screws

(M5 ×20) to a surface which is more than 10 mm thick and

can support more than 5 kg.

• Mount the transceiver so that the face of the transceiver is at

90° to your line of sight when operating it.

CAUTION: KEEP the transceiver and microphone at

least 1 meter away from your vessel’s magnetic navigation

compass.

NOTE: Check the installation angle; the function display

may not be easy-to-read at some angles.

These screws are shown as mounting example only.

Not supplied with accessories.

• OVERHEAD MOUNTING

• MOUNTING ON THE BOARD

CONNECTIONS AND MAINTENANCE

DDUsing the optional MB-75

An optional MB-75 FLUSH MOUNT is available for mounting

the transceiver to a ﬂat surface such as an instrument panel.

CAUTION: KEEP the transceiver and microphone at

least 1 meter away from your vessel’s magnetic navigation

compass.

qUsing the template on the last page, carefully cut a hole

into the instrument panel (or wherever you plan to mount

the transceiver).

wSlide the transceiver through the hole as shown below.

eAttach the 2 supplied bolts (M5 ×8 mm) on either side of

the IC-M502A.

rAttach the clamps on either side of the IC-M502A.

• Make sure that the clamps align parallel to the IC-M502A’s body.

tTighten the end bolts on the clamps (rotate clockwise) so

that the clamps press firmly against the inside of the in-

strument control panel.

yTighten the locking nuts (rotate counterclockwise) so that

the IC-M502A is securely mounted in position as below.

uConnect the antenna and power cable, then return the in-

strument control panel to its original place.

9CONNECTIONS AND MAINTENANCE

■Optional unit installation

CAUTION: DISCONNECT the DC power cable from the

transceiver before performing any work on the transceiver.

Otherwise, there is danger of electric shock and/or equip-

ment damage.

Follow the case opening procedure shown here when you

want to install an optional unit.

qRemove the 6 screws as shown below and open the trans-

ceiver.

wRemove the 4 screws from the shielding plate, then lift up

the shielding plate.

ePlug an optional unit (UT-98 or UT-112) to J3 on the MAIN

unit as shown below.

rReturn the shielding plate and assemble the units to their

original positions.

CAUTION:

• When re-assembling the case and tightening the screws,

you must keep the speciﬁed torque (0.7±0.1 N.m). Oth-

erwise the transceiver may be damaged (torque too high)

or lose waterproof efﬁciency (torque too low).

• When uninstalling the optional unit, remove it vertically.

Wiggling the unit from side to side may damage the op-

tional unit's connector.

Optional unit

CONNECTIONS AND MAINTENANCE

■Dimensions

145.0 (5 23⁄32)

165.0 (6 1⁄2)

31.4

(1 1⁄4)

53.0

(2 3⁄32)Unit: mm (inch)

110.0 (4 11⁄32) 109.4 (4 5⁄16)

10 TROUBLESHOOTING

PROBLEM POSSIBLE CAUSE SOLUTION REF.

No power comes ON. •Bad connection to the power supply. •Check the connection to the transceiver. p. 43

No sound comes from

the speaker.

•Squelch level is too high.

•Volume level is too low.

•Speaker has been exposed to water.

•Internal speaker is turned OFF.

•Set squelch to the threshold point.

•Set [VOL] to a suitable level.

•Drain water from the speaker.

•Turn the internal speaker ON in Set mode.

p. 8

—

p. 40

Transmitting is impossi-

ble, or high power can

er can

not be selected.

•Some channels are for low power or re-

ceive only.

•The output power is set to low.

•Change channels.

•Push [HI/LO] to select high power.

pgs.

6, 49

p. 8

Scan does not start. •‘TAG’ channel is not prog rammed. •Set the desired channels as ‘TAG’ chan-

nels.

p. 13

No beep sounds. •Beep tone is turned OFF.

•The squelch is open.

•Turn the beep tone ON in Set mode.

•Set squelch to the threshold point.

p. 40

p. 8

Receive signal cannot

be understood.

•Optional voice scrambler is turned OFF.

•Scramble code is not set correctly.

•Turn the optional voice scrambler ON.

•Reset the scramble code.

p. 10

p. 41

Sensitivity is low. •The attenuator is activated. •Push [LO/DX] to turn the function OFF. p. 8

Distress call cannot be

transmitted.

•MMSI (DSC self ID) code is not pro-

grammed.

•Program the MMSI (DSC self ID) code. p. 14

CHANNEL LIST

Channel number

USA CAN

Transmit

Receive

01 156.050 160.650

01A 156.050 156.050

02 156.100 160.700

03 156.150 160.750

03A 156.150 156.150

156.200 160.800

04A 156.200 156.200

156.250 160.850

05A 05A 156.250 156.250

06 06 156.300 156.300

156.350 160.950

07A 07A 156.350 156.350

08 08 156.400 156.400

09 09 156.450 156.450

10 10 156.500 156.500

11 11 156.550 156.550

12 12 156.600 156.600

13†13†156.650 156.650

14 14 156.700 156.700

15†15†156.750 156.750

16 16 156.800 156.800

17†17†156.850 156.850

156.900 161.500

18A 18A 156.900 156.900

Frequency (MHz)

INT

15†

Channel number Frequency (MHz)

USA CAN

Transmit

Receive

19A 19A 156.950 156.950

20 20†157.000 161.600

21 157.050 161.650

21A 21A 157.050 157.050

157.100 161.700

22A 22A 157.100 157.100

23 157.150 161.750

23A 157.150 157.150

24 24 157.200 161.800

25 25 157.250 161.850

26 26 157.300 161.900

27 27 157.350 161.950

28 28 157.400 162.000

60 156.025 160.625

156.075 160.675

61A 61A 156.075 156.075

156.125 160.725

62A 156.125 156.125

156.175 160.775

63A 156.175 156.175

64 156.225 160.825

INT

20A 157.000 157.000

Channel number

66A

Frequency (MHz)

66A†

USA CAN

Transmit

Receive

64A 64A 156.225 156.225

65A 65A 156.275 156.275

156.325 160.925

67†67 156.375 156.375

68 68 156.425 156.425

69 69 156.475 156.475

70‡70‡156.525 156.525

71 71 156.575 156.575

72 72 156.625 156.625

73 73 156.675 156.675

74 74 156.725 156.725

77†77†156.875 156.875

156.925 161.525

78A 78A 156.925 156.925

156.975 161.575

79A 79A 156.975 156.975

157.025 161.625

80A 80A 157.025 157.025

157.075 161.675

81A 81A 157.075 157.075

157.125 161.725

82A 82A 157.125 157.125

INT

65A

70‡

156.325 156.32566A

Channel number

84A

Frequency (MHz)

USA CAN

Transmit

Receive

83A 83A 157.175 157.175

84 84 157.225 161.825

85 85 157.275 161.875

85A 157.275 157.275

86 86 157.325 161.925

86A 157.325 157.325

87 87 157.375 161.975

87A 157.375 157.375

88 88 157.425 162.025

88A 157.425 157.425

INT

157.225 157.225

WX channel

Frequency (MHz)

Transmit Receive

1 RX only 162.550

2 RX only 162.400

3 RX only 162.475

5 RX only 162.450

6 RX only 162.500

7 RX only 162.525

8 RX only 161.650

9 RX only 161.775

10 RX only 163.275

RX only 162.425

†Low power only. ‡DSC operation only.

156.950 161.55019

21b Rx only 161.650

25b Rx only 161.850

156.275 160.87565

28b Rx only 162.000

83 157.175 161.77583

83b Rx only 161.775

NOTE: Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83 CANNOT

be lawfully used by the general public in U.S.A. waters.

12 SPECIFICATIONS AND OPTIONS

■Speciﬁcations

DDGeneral

• Frequency coverage :

Transmit 156.025–157.425 MHz

Receive 156.050–163.275 MHz

• Mode : FM (16K0G3E)

DSC (16K0G2B)

• Channel spacing : 25 kHz

• Current drain (at 13.8 V) : TX high 5.5 A max.

Max. audio 1.5 A max.

• Power supply requirement: 13.8 V DC ±15%

• Frequency stability : ±10 ppm

(–20°C to +60°C; –4°F to +140°F)

• Dimensions : 165(W) ×110(H) ×109.4(D) mm

(Projection not included) 6 1⁄2(W) ×411⁄32(H) ×45⁄16(D) in

• Weight (approx.) : 1130 g; 2 lb 8 oz

DDTransmitter

• Output power : 25 W / 1 W

• Modulation system : Variable reactance phase

modulation

• Max. frequency deviation : ±5.0 kHz

• Spurious emissions : –70 dBc

DDReceiver

• Receive system :

Double conversion

superheterodyne

• Sensitivity (12 dB SINAD) : 0.22 µV (typical)

• Squelch sensitivity : 0.22 µV (typical)

•

Intermodulation rejection ratio

: More than 75 dB

• Spurious response : More than 75 dB

rejection ratio

•

Adjacent channel selectivity

: More than 75 dB

• Audio output power : 4.5 W (typical) at 10% distortion

with a 4 Ωload

All stated specifications are subject to change without

notice or obligation.

SPECIFICATIONS AND OPTIONS

■Options

•MB-75 FLUSH MOUNT

For mounting the transceiver to a panel.

•SP-5 EXTERNAL SPEAKER

A large, external speaker for superior audio output.

•SP-10 EXTERNAL SPEAKER

A compact, external speaker. Features easy installation.

•UT-98/ UT-112 VOICE SCRAMBLER UNIT (pgs. 10, 41)

Ensures private communications. 128 (for UT-98) or 32 (for

UT-112) codes are available. Not available in some countries.

•HM-127 REMOTE-CONTROL MICROPHONE (p. 52)

External microphone-type controller. Provides optional Inter-

com operation. 6 m (20 feet) microphone cable and mount-

ing base included. Black and white colors are available.

•OPC-999 MICROPHONE EXTENSION CABLE

6 m (20 feet) microphone extension cable for optional

HM-127. Up to 2 OPC-999 can be connected. (18 m; 60 feet

maximum)

13 HM-127 REMOTE-CONTROL MICROPHONE OPTION

■Panel description

The optional HM-127 remotely controls the IC-M502A and

provides an optional Intercom function.

DDFront and side keys

qPTT SWITCH [

[PTT

PTT]

](pgs. 8, 57)

Push and hold to transmit; release to receive.

wCHANNEL UP/DOWN KEYS [

[YY

YY]

]/[

[ZZ

ZZ]

]

➥Push either key to change the operating channel, Set

mode settings, etc. (pgs. 8, 57)

➥Push either key to adjust audio level or noise squelch

level after [

[VOL

VOL]

]or [

[SQL

SQL]

]is pushed, respectively.

(pgs. 8, 57)

➥

Push either key to adjust the brightness of the LCD and

key backlight after [

[VOL

VOL]

]is pushed for 1 sec. (p. 58)

➥In Set mode, changes setting of the selected item. (pgs.

38, 62)

➥Checks tag channels or changes scanning direction dur-

ing scan. (pgs. 13, 61)

eCHANNEL 16/CALL CHANNEL KEY [

[]

](

)

➥Selects Channel 16 when pushed. (pgs. 6, 56)

➥Selects call channel when pushed for 1 sec. (pgs. 6, 56)

•“CALL” appears when call channel is selected.

➥Push for 3 sec. to enter call channel programming con-

dition when call channel is selected. (pgs. 9, 59)

➥While pushing [

[H/L

H/L]

], enters channel comments pro-

gramming condition. (pgs. 9, 63)

➥Enters Set mode when pushed while turning power ON.

(pgs. 38, 62)

Top keys

HM-127 REMOTE-CONTROL MICROPHONE

rCHANNEL/DUALWATCH/TRI-WATCH KEY

[

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C)

➥Selects and toggles the regular channels and weather

channel when pushed momentarily. (pgs. 6, 7, 56)

➥While pushing [

[H/L

H/L]

], selects one of 3 regular channels

in sequence when pushed. (pgs. 7, 56)

•International, U.S.A. and Canadian channels are available for

regular channels.

➥Starts Dualwatch or Tri-watch when pushed for 1 sec.

(pgs. 11, 60)

➥Stops Dualwatch or Tri-watch when either is activated.

tATTENUATOR/INTERCOM/SCRAMBLER KEY

[

[LO/DX

LO/DX]

](

(SCR)

SCR)

➥Toggles the Attenuator function ON or OFF when

pushed momentarily. (pgs. 8, 57)

•“LOCAL” appears when the Attenuator is in use.

➥Activates the Intercom function when pushed for 1 sec.

(pgs. 36, 63)

➥Calls the IC-M502A when pushed and held while in In-

tercom mode. (pgs. 36, 63)

➥While pushing [

[H/L

H/L]

], activates an optional Voice scram-

bler function. (pgs. 10, 60)

•The optional Voice scrambler function cannot be used on

Channel 16 and 70.

ySQUELCH/MONITOR/LOCK KEY [

[SQL

SQL]

](

(L)

➥[

[YY

YY]

]/[

[ZZ

ZZ]

]sets the squelch threshold level after pushing

[

[SQL

SQL]

]. (p. 57)

➥Push [

[SQL

SQL]

](

(L)

L) for 1 sec. to turn the monitor func-

tion ON. (p. 59)

➥While pushing [

[H/L

H/L]

], push [

[SQL

SQL]

](

(L)

L) to toggle the

(microphone) Key lock function ON or OFF. (p. 58)

•“ T” appears while Key lock function is in use.

•[

[PWR

PWR]

], [

[PTT

PTT]

], [

[VOL

VOL]

], [

[SQL

SQL]

]and [

[H/L

H/L]

]still function when

the (microphone) Key lock function is turned ON.

➥Advance the cursor while in channel comment program-

ming condition. (pgs. 9, 63)

uVOLUME/DIMMER KEY [

[VOL

VOL]

](

()

)

➥[

[YY

YY]

]/[

[ZZ

ZZ]

]adjusts the audio level after pushing [

[VOL

VOL]

]

(p. 57)

➥Push [

[VOL

VOL]

](

()

)for 1 sec. to adjust the brightness of

the LCD and key backlight. (p. 58)

➥Move the cursor backward while in channel comment

programming condition. (pgs. 9, 63)

DIM

MONI

13 HM-127 REMOTE-CONTROL MICROPHONE

DDTop keys

qPOWER KEY [PWR] (pgs. 8, 57)

Push for 2 sec. to turn the HM-127 power ON or OFF

when the IC-M502A power is turned ON.

wSCAN KEY [

[SCAN

SCAN]

](

()

)(pgs. 13, 61)

➥Starts and stops Normal or Priority scan when tag chan-

nels are programmed.

➥Push [

[SCAN

SCAN]

](

()

)for 1 sec. to set the displayed chan-

nel as a tag (scanned) channel.

➥While pushing [

[H/L

H/L]

], push for 3 sec. to clear or set all

tag channels.

eTRANSMIT POWER KEY [

[H/L

H/L]

]

➥Toggles high or low power when pushed. (pgs. 8, 57)

• Some Channels are set to low power only.

➥While pushing this key, other keys perform secondary

functions.

➥Toggles the All key lock function ON or OFF when

pushed while turning power ON. (p. 58)

•“ T” blinks while the All key lock function is in use.

•Only [

[PWR

PWR]

]and [

[PTT

PTT]

]function when the All key lock func-

tion is in use.

■Function display

qCHANNEL GROUP INDICATOR (pgs. 7, 56)

Indicates whether an International (INT), U.S.A. (USA) or

Canadian (CAN) channel is selected.

wKEY LOCK INDICATOR (p. 58)

➥Appears while the Key lock function is in use.

➥Blinks while the All key lock function is in use.

CALL

WX ALT

DUP

P SCAN

SCRM

LOCAL

TRI

DUAL

LOW

TAG

CAN

USA

INT

TX BUSY

VOL

SQL

!8 !7 !4!5 !3

TAG

PWR SCAN H/L

TAG

HM-127 REMOTE-CONTROL MICROPHONE

eCHANNEL NUMBER READOUT

➥Indicates the selected operating channel number.

“A” appears when a simplex channel is selected. “b” ap-

pears when a receive only channel for a Canadian chan-

nel group is selected. (pgs. 6, 56)

➥In Set mode, indicates the selected condition. (pgs. 38,

62)

rVOLUME INDICATOR (p. 57)

Appears while audio output level is adjusted.

tSQUELCH INDICATOR (p. 57)

Appears while noise squelch level is adjusted.

yCHANNEL COMMENT INDICATOR

➥Channel comment appears (and scrolls) if programmed.

(pgs. 9, 63)

➥In Set mode, indicates or scrolls the selected Set mode

item. (pgs. 38, 62)

uATTENUATOR INDICATOR (pgs. 8, 57)

Appears when the RF Attenuator is in use.

iSCRAMBLER INDICATOR (pgs. 10, 60)

Appears when an optional Voice scrambler is activated.

oSCAN INDICATOR (pgs. 13, 61)

➥“SCAN” appears during Normal scan.

➥“P SCAN” appears during Priority scan.

!0 PRIORITY CHANNEL INDICATOR

➥Indicates a priority channel during Priority scan or

Dual/Tri-watch. (pgs. 11, 13, 60, 61)

➥“IC” appears during Intercom mode. (pgs. 36, 63)

!1 DUAL/TRI WATCH INDICATOR (pgs. 11, 60)

“DUAL” appears during Dualwatch; “TRI” during Tri-watch.

!2 WEATHER CHANNEL INDICATOR (pgs. 7, 56)

➥“WX” appears when a weather channel is selected.

➥“WX ALT” appears when the Weather alert function is in

use; blinks when an alert tone is received.

!3 LOW POWER INDICATOR (pgs. 8, 57)

Appears when low power is selected.

!4 CALL CHANNEL INDICATOR (pgs. 6, 56)

Appears when call channel is selected.

!5 DUPLEX INDICATOR (pgs. 7, 56)

Appears when a duplex channel is selected.

!6 TAG CHANNEL INDICATOR (pgs. 13, 61)

Appears when a tag channel is selected.

!7 BUSY INDICATOR (pgs. 8, 57, 59)

Appears when receiving a signal or when the squelch

opens.

!8 TRANSMIT INDICATOR (pgs. 8, 57)

Appears while transmitting.

13 HM-127 REMOTE-CONTROL MICROPHONE

■Channel selection

DDChannel 16

qPush [

[]

]to select Channel 16.

wPush [

[CH/WX

CH/WX]

]to return to the

condition before selecting Chan-

nel 16, or push [

[YY

YY]

]or [

[ZZ

ZZ]

]to se-

lect an operating channel.

DDCall channel

qPush [

[]

](

)for 1 sec. to select

call channel.

wPush [

[CH/WX

CH/WX]

]to return to the

condition before selecting call

channel, or push [

[YY

YY]

]or [

[ZZ

ZZ]

]to

select an operating channel.

DDWeather channels

qPush [

[CH/WX

CH/WX]

]once or twice to

select the weather channel group.

wPush [

[YY

YY]

]or [

[ZZ

ZZ]

]to select a

weather channel.

ePush [

[CH/WX

CH/WX]

]to return to the

condition before selecting the

weather channel group.

U.S.A., International and Canadian channels

qPush [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) to select a regular channel.

• Push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) again, if a weather channel appears.

wWhile pushing [

[H/L

H/L]

], push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) to select a

channel group.

• U.S.A., International and Canadian channels can be selected in

sequence.

Push

Push for 1 sec.

Push

while pushing

U.S.A. channels

Canadian channelsInternational channels

HM-127 REMOTE-CONTROL MICROPHONE

■Receiving and transmitting

qPush [

[PWR

PWR]

]to turn power ON.

wPush [

[VOL

VOL]

], then [

[YY

YY]

]/[

[ZZ

ZZ]

]to adjust audio output level.

• Push [

[SQL

SQL]

], then push [

[YY

YY]

]/[

[ZZ

ZZ]

]to mute any audio noise, if nec-

essary.

ePush [

[YY

YY]

]/[

[ZZ

ZZ]

]to select the desired channel.

•When receiving a signal, “ ” appears and audio is emitted

from the speaker.

• Further adjustment of the audio level may be necessary at this

point.

• Use the optional Voice scrambler function for privacy. (pgs. 10, 60)

rPush [

[H/L

H/L]

]to select the output power, if necessary.

• “LOW” appears when low power is selected.

• Choose low power for short range communications, choose high

power for longer distance communications.

• Some channels are for selecting low power only.

tPush and hold [

[PTT

PTT]

]to transmit, then speak into the mi-

crophone.

• “ ” appears.

• Channel 70 cannot be used for transmission other than DSC.

Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83

CANNOT be lawfully used by the general public in

U.S.A. waters.

yRelease [

[PTT

PTT]

]to receive.

IMPORTANT: To maximize the readability of your trans-

mitted signal (voice), pause a few sec. after pushing

[

[PTT

PTT]

], hold the microphone 2 to 4 inches (5 to 10 cm)

from your mouth and speak at a normal voice level.

w Set volume

w Set squelch,

if required

r Set output power

t Speak into

microphone

q Turn power ON

e Set channel

t Push to

transmit

y Release

to receive

13 HM-127 REMOTE-CONTROL MICROPHONE

■Lock functions

The Lock function electronically locks keys and switches to

prevent accidental changes and function access from the mi-

crophone.

• All keys, switches and controllers on the transceiver are functional.

DDActivating the Lock function

➥While pushing [

[H/L

H/L]

], push

[

[SQL

SQL]

](

(L)

L) to turn the Lock

function ON or OFF.

• “ ” appears.

•

Only [

[PWR

PWR]

], [

[PTT

PTT]

], [

[H/L

H/L]

[

[SQL

SQL]

]

(

(L)

, [

[VOL

VOL]

]+[

[YY

YY]

]/[

[ZZ

ZZ]

]

and [

[SQL

SQL]

]+[

[YY

YY]

]/[

[ZZ

ZZ]

]are func-

tional.

DDActivating the All key lock function

➥While pushing [

[H/L

H/L]

], turn the

power ON by pushing [

[PWR

PWR]

]

to turn the All key lock function

ON or OFF.

• “ ” blinks.

•Only [

[PWR

PWR]

]and [

[PTT

PTT]

]are

functional.

■Display backlighting

The function display and keys can be backlit for better visibil-

ity under low light conditions. The backlighting condition can

also be adjusted independently from the transceiver.

qPush [

[VOL

VOL]

](

()

)for 1 sec.

to enter Backlight adjusting

mode.

•“ ” with the number of the

backlight level appears in the

channel comment indicator.

wPush [

[YY

YY]

]/[

[ZZ

ZZ]

]to adjust the

backlight level.

• The backlight level is adjustable

between 0 (light OFF) and 7

(brightest).

For your reference:

Pushing [

[YY

YY]

]/[

[ZZ

ZZ]

], while [H/L]

[H/L] is pushed, also adjusts back-

light level.

• No backlight level indication is available.

DIM

MONI

Appears when the lock

function is in use.

Appears while in the

Backlight adjustment

mode.

Blinks when the all lock

function is in use.

HM-127 REMOTE-CONTROL MICROPHONE

■Monitor function

The monitor function releases the noise squelch mute of the

microphone only. (An independent noise squelch system is

employed.)

■RF attenuator function

➥Push [

[LO/DX

LO/DX]

]to turn the RF

attenuator function ON and

OFF.

■Call channel programming

qPush [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) several

times while pushing [

[H/L

H/L]

]to select

the desired channel group (USA,

INT, CAN) to be programmed.

wPush [

[]

](

)for 1 sec. to select

call channel of the selected chan-

nel group.

•“CALL” and call channel number ap-

pear.

ePush [

[]

](

)again for 3 sec. (until

a long beep changes to 2 short

beeps) to enter call channel pro-

gramming condition.

•The channel number and channel

group to be programmed blinks.

rPush [

[YY

YY]

]/[

[ZZ

ZZ]

]to select the desired

channel.

tPush [

[]

](

)to program the dis-

played channel as call channel.

•The channel number and channel

group stop ﬂashing.

Appears when the RF

attenuator function is

in use.

Blinks when the Monitor

function is in use.

➥Push [

[SQL

SQL]

](

(L)

L) for 1 sec.

to activate the Monitor func-

tion.

• “ ” blinks and audio is emit-

ted.

•Any key cancels the Monitor

function.

MONI

13 HM-127 REMOTE-CONTROL MICROPHONE

■Optional Voice scrambler

operation

DDActivating the Scrambler

qSelect an operating channel,

except for Channel 16, Chan-

nel 70 or weather channels.

wWhile pushing [

[H/L

H/L]

], push

[

[LO/DX

LO/DX]

](

(SCR)

SCR)

to turn the

Voice scrambler function ON.

• “SCRM” appears.

eTo turn the Scrambler func-

tion OFF, repeat step w.

• “SCRM” disappears.

DDProgramming scramble codes

There are 128 codes available with UT-98 or 32 codes (01

to 32) available with the UT-112 for programming. In order to

understand one another, all transceivers in your group must

have the same scrambler code as well as the same scram-

bler unit. The scrambler code is programmed in Set mode.

See pgs. 10, 41 for details.

■Dualwatch/Tri-watch

operation

qPush [

[YY

YY]

]/[

[ZZ

ZZ]

]to select the desired channel.

• Push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) several times while pushing [

[H/L

H/L]

]to

select the channel group (USA, INT, CAN), if desired.

wPush [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) for 1 sec. to start Dualwatch or

Tri-watch.

•“DUAL” appears during Dual-

watch; “TRI” appears during Tri-

watch.

• A beep tone sounds when a sig-

nal is received on Channel 16.

•Tri-watch becomes Dualwatch

when receiving a signal on call

channel.

•Dualwatch or Tri-watch can be

selected in the transceiver’s Set

mode.

eTo cancel Dualwatch/Tri-watch, push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C)

again.

Appears when the Voice

scrambler function is in use

Appears when the Dual or

Tri-watch function is in use.

HM-127 REMOTE-CONTROL MICROPHONE

■Starting a scan

qWhile pushing [

[H/L

H/L]

], push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) several

times to select the channel group (USA, INT, CAN), if de-

sired.

•When the Weather alert function is in use, select the desired

weather channel with [

[CH/WX

CH/WX]

]and [

[YY

YY]

]/[

[ZZ

ZZ]

wPush [

[SCAN

SCAN]

]to start Priority or Normal scan.

• “SCAN” appears during Normal scan.

• The priority channel readout indicates “16”, and “P” and “SCAN”

indicators appear during Priority scan.

•When a signal is received, scan pauses until the signal disap-

pears or resumes after pausing 5 sec. according to the Set mode

setting (Channel 16 is still monitored during Priority scan).

• Push [

[YY

YY]

]/[

[ZZ

ZZ]

]to check the scanning tag channels, to change the

scanning direction or resume the scan manually.

To stop the scan, push [

[SCAN

SCAN]

](

()

• “SCAN” disappears.

• Pushing [

[PTT

PTT]

], [

[]

](

)or [

[CH/WX

CH/WX]

]also stops the scan.

■Setting tag channels

qWhile pushing [

[H/L

H/L]

], push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) several

times to select the channel group (USA, INT, CAN), if de-

sired.

wPush [

[YY

YY]

]/[

[ZZ

ZZ]

]to select the desired channel to set as a tag

channel.

ePush [

[SCAN

SCAN]

](

()

)for 1 sec. to set the displayed channel

as a tag channel.

• “ ” appears.

rTo cancel the tag channel setting, push [

[SCAN

SCAN]

](

()

)for

1 sec.

• “ ” disappears.

Convenient: Clearing (setting) all tagged channels

➥While pushing [

[H/L

H/L]

], push [

[SCAN

SCAN]

](

()

)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.

TAG

13 HM-127 REMOTE-CONTROL MICROPHONE

■Set mode programming

Set mode is used to change the condition of the transceiver’s

functions and the microphone’s own functions:

Transceiver’s functions—

scan mode (Normal or Priority), scan resume timer, weather

alert, Dualwatch/Tri-watch, DSC watch, transceiver’s beep

tone, internal speaker (transceiver), LCD contrast (trans-

ceiver), RF attenuation level, scrambler code, scrambler type

and automatic acknowledgement.

Microphone’s own functions—

beep tone function (microphone) and LCD contrast (micro-

phone).

In this section, instructions are for the microphone’s own func-

tions only. Refer to pgs. 38–41 for the setting of the other

functions. (Some functions cannot be selected from the HM-

127.)

DDEntering Set mode

qTurn power OFF.

wWhile pushing [

[]

](

), turn power ON.

•After a beep emission, a Set mode item (in the channel comment in-

dicator and the condition in the channel number readout) is displayed.

ePush [

[]

](

)to select the desired item, if necessary.

rPush [

[YY

YY]

]/[

[ZZ

ZZ]

]to select the desired condition of the item.

tTurn power OFF, then ON to exit Set mode.

•Beep tone “BEEP”

➥Push [

[YY

YY]

]to turn ON, [

[ZZ

ZZ]

]to turn OFF the beep output.

•LCD contrast “LCD CONTRAST”

➥Push [

[YY

YY]

]/[

[ZZ

ZZ]

]to adjust to a suitable LCD contrast.

Push

HM-127 REMOTE-CONTROL MICROPHONE

■Intercom operation

qPush

[

[LO/DX

LO/DX]

](

(SCR)

SCR)

for 1 sec.

to activate the Intercom function.

•“IC” appears in the priority channel

readout.

• The channel comment disappears.

wPush [

[PTT

PTT]

]to talk.

• “ ” appears in the channel com-

ment indicator.

eRelease [

[PTT

PTT]

]to listen.

•“ ” appears in the channel comment indicator when the

transceiver is in talking mode.

rPush [

[LO/DX

LO/DX]

](

(SCR)

SCR) to cancel the Intercom function.

• Pushing [

[]

]also cancels the Intercom function.

For your reference:

In case the Intercom mode is selected with the transceiver

while the microphone power is OFF, the microphone power is

automatically turned ON and the Intercom mode is selected.

DDIntercom beep function

➥Push [

[LO/DX

LO/DX]

](

(SCR)

SCR) for more than 1 sec.

• Emits the Intercom beep while holding.

■Channel comments

qPush [

[YY

YY]

]/[

[ZZ

ZZ]

]to select a channel to program a channel

comment.

• Push [

[CH/WX

CH/WX]

](

(U/I/C)

U/I/C) several times while pushing [

[H/L

H/L]

]to

select the channel group (USA, INT, CAN), if desired.

wWhile pushing [

[H/L

H/L]

], push [

[]

](

• The 1st character of the currently programmed comment blinks.

ePush [

[YY

YY]

]/[

[ZZ

ZZ]

]to select a character.

rPush [

[SQL

SQL]

]to move to forward; then push [

[YY

YY]

]/[

[ZZ

ZZ]

]to se-

lect a character.

• Push [

[VOL

VOL]

]to move to backward.

tContinue until the desired characters have been selected,

then push [

[]

](

)to return to normal operation.

•Available characters

(r)

(s) (t) (u) (v) (w) (x) (y) (z)

(q)

(3)

(D)

(N)

(X)

(h)

(+)

(4)

(E)

(O)

(Y)

(i)

(–)

(5)

(F)

(P)

(Z)

(j)

(✱)

(6)

(G)

(Q)

(a)

(k)

(/)

(7)

(H)

(R)

(b)

(l)

(,)

(8)

(I)

(S)

(c)

(m)

(space)

(9)

(T)

(d)

(n)

(0)

(A)

(U)

(e)

(o)

(1)

(B)

(V)

(f)

(p)

(2)

(C)

(J) (K) (L)

(M)

(W)

(g)

(.)

(

))((

)(’)(&)(

)($)(#)(")(!)

Appears when the inter-

com function is in use.

13 HM-127 REMOTE-CONTROL MICROPHONE

■HM-127 supplied accessories

Accessories included with the HM-127: Qty.

qConnection cable (OPC-1000: 6 m; 20 ft) ...................... 1

wMounting base ................................................................ 1

eMicrophone hanger ........................................................ 1

rScrews (M3 ×16; tapping) ............................................. 5

HM-127 REMOTE-CONTROL MICROPHONE

■Installation

The optional HM-127 can be connected to the transceiver di-

rectly, as well as via the supplied connection cable for longer

distance remote operation. The connector of the connection

cable can be installed into a cabinet, wall, etc., as a built-in

plug.

For longer distance remote operation, the optional extension

cable, OPC-999 (6 m; 20 ft/connecting between transceiver

and the connection cable), is available, and up to 2 OPC-999

can be added.

qInsert the supplied cable into the external microphone jack

and tighten the cable nut as shown below.

wTo use the supplied cable as a wall socket, follow the

below steps.

eUsing the mounting base, carefully mark off the 2 spots

where the cable and screws will be fastened.

rDrill holes at these marks.

tInstall the mounting base using the supplied screws as

shown below.

yThe completed installation should look like this.

Gasket

Cap

Mounting base Nut

Screw holes

(approx. 2 (d) mm; 3⁄32″)

13 HM-127 REMOTE-CONTROL MICROPHONE

50 (d) mm; 131⁄32˝

23 (d) mm; 29⁄32˝

24 to 27 (d) mm

(15⁄16 to 11⁄16˝)

5 mm; 3⁄16˝

Gasket

Mounting base

Cap

Nut

2 mm; 3⁄32˝

TEMPLATE

149 mm (57⁄8 in)

165 mm (61⁄2 in)

92 mm (35⁄8 in)

110 mm (411⁄32 in)

4–R11

24 to 27 (d) mm

(15⁄16 to 11⁄16 in)

2 mm; 3⁄32 in

MB-75

HM-127

Cut here

1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan

A-6301H-1EX

Printed in Japan

ICOM orporated 269700 VHF Marine Transceiver User Manual

ICOM Incorporated VHF Marine Transceiver Users Manual

Users Manual

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