Icom IC-M502A Instruction Manual

8/8/2019 Icom IC-M502A Instruction Manual

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1

1OPERATING RULESD

PRIORITIESRead all rules and regulations pertaining to priorities andkeep an up-to-date copy handy. Safety and distress callstake priority over all others.

You must monitor Channel 16 when you are not operatingon another channel.

False or fraudulent distress signals are prohibited and pun-ishable by law.

D PRIVACY Information overheard but not intended for you cannot law-fully be used in any way.

Indecent or profane language is prohibited.

D RADIO LICENSES(1) SHIP STATION LICENSEYou must have a current radio station license before using the

transceiver. It is unlawful to operate a ship station which is notlicensed.

Inquire through your dealer or the appropriate governmentagency for a Ship-Radiotelephone license application. Thisgovernment-issued license states the call sign which is your

crafts identication for radio purposes.

(2) OPERATORS LICENSEA Restricted Radiotelephone Operator Permit is the licensemost often held by small vessel radio operators when a radiois not required for safety purposes.

The Restricted Radiotelephone Operator Permit must beposted or kept with the operator. Only a licensed radio opera-tor may operate a transceiver.

However, non-licensed individuals may talk over a transceiverif a licensed operator starts, supervises, ends the call andmakes the necessary log entries.

Keep a copy of the current government rules and regulationshandy.

Radio license for boaters (U.S.A. only)The Telecommunications Act of 1996 permits recreationalboaters to have and use a VHF marine radio, EPIRB, andmarine radar without having an FCC ship station license.Boaters traveling on international voyages, having an HFsingle 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 furtherinformation, see the FCC Ship Radio Stations Fact Sheet.

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PANEL DESCRIPTION

2

2I Front panel

WATERPROOF

SCANTAG

DSC/ENTPOS

HI/LOPOWER

VOL

iM502VHF MARINE

SQL

LO/DXIC SCR

CH/WXDW U/I/C 916

DISTRESS

SpeakerFunctiondisplay

q w e r t y u

io!0!1 q VOLUME CONTROL [[VOLVOL ]] (p. 8)Adjusts the audio level.

w POWER KEY [[POWERPOWER ]]Push to turn the transceiver power ON or OFF.

e SQUELCH CONTROL [[SQLSQL ]] (p. 8)Sets the squelch threshold level.

r TRANSMIT POWER KEY [[HI/LOHI/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.

t CHANNEL SELECTOR [[CHANNELCHANNEL ]] Rotate [[CHANNELCHANNEL ]] to select the operating channels,

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

While pushing [[HI/LOHI/LO ]], rotate [[ CHANNELCHANNEL ]] to adjustthe brightness of the LCD and key backlight. (p. 37)


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y ATTENUATOR/INTERCOM/SCRAMBLER KEY[[LO/DXLO/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 ofindication precedence is SP OFF , LOCAL and CALL .

Activates an optional Intercom function when pushed for1 sec. (p. 36)

Calls optional HM-127 REMOTE-CONTROL MICROPHONEwhen pushed and held while in Intercom mode. (p. 36)

While pushing [[ HI/LOHI/LO ]] , activates an optional Voicescrambler function. (p. 10)The optional Voice scrambler function cannot be used onChannel 16 and 70.

u CHANNEL 16/CALL CHANNEL KEY [[ 99 ]] 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/LOHI/LO ]], enters channel comments pro-

gramming condition. (p. 9) Enters Set mode when pushed while turning power ON.

(p. 38)

i DISTRESS KEY [[DISTRESSDISTRESS

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

o CHANNEL/DUALWATCH/TRI-WATCH KEY[[CH/WXCH/WX ]] (( U/I/C)U/I/C) Selects and toggles the regular channels and weather

channel when pushed momentarily. (p. 7) While pushing [[HI/LOHI/LO ]], selects one of 3 regular chan-

nels in sequence when pushed. (p. 7) International, U.S.A. and Canadian channels are available forregular 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 [[SCANSCAN ]] (( )) (p. 13) Starts and stops Normal or Priority scan when tag

(scanned) channels are programmed. Push [[SCANSCAN ]] (( )) for 1 sec. to set or cancel the dis-

played channel as a tag (scanned) channel. While pushing [[HI/LOHI/LO ]], push for 3 sec. to clear or set

all tag channels.

!1 DSC/POSITION KEY [[DSC/ENTDSC/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

TAG

DW

1616

IC

PANEL DESCRIPTION

3

2

2


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I Function displayq BUSY/TRANSMIT INDICATOR (p. 8)

BUSY appears when receiving a signal or when thesquelch opens.

TX appears while transmitting.

w POWER INDICATOR (p. 8) 25W appears when high power is selected. 1W appears when low power is selected.

e TAG CHANNEL INDICATOR (p. 13)

Appears when a tag channel is selected.

r CHANNEL 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)

t SCRAMBLER INDICATOR (p. 10)Appears when an optional Voice scrambler is activated.

INT

CALL

BUSY

25WTAG SC DUPCALLING

w

q

e

r

t uy

io

PANEL DESCRIPTION

4

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5

2PANEL DESCRIPTION

y DUPLEX INDICATOR (p. 7)Appears when a duplex channel is selected. Duplex channel has a different TX and RX frequency.

u CHANNEL 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)

i CHANNEL GROUP INDICATOR (p. 7)Indicates whether an International INT , U.S.A. USA ,Canadian CAN or weather WEATHER channel is se-lected.

o CALL 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 .

I Microphone

q PTT SWITCH [[PTTPTT ]] (p. 8)Push and hold to transmit; release to receive.

w CHANNEL UP/DOWN KEYS [[ YY ]] / [[ ZZ ]] (pgs. 8, 38)Push either key to change the operating channel, Setmode settings, etc.

e CHANNEL 16/CALL CHANNEL KEY [[16/916/9 ]] Push to select Channel 16; push for 1 sec. to select call

channel (default is Channel 9). (p. 6) While pushing [[16/916/9 ]], turn power ON to toggle the Lock

function ON or OFF. (p. 37)

Speaker

Microphonew

q

e

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6

3 BASIC OPERATIONI Channel selectionD Channel 16Channel 16 is the distress and safety channel. It is used forestablishing initial contact with another station and for emer-gency communications. Channel 16 is monitored during bothDualwatch and Tri-watch. While standing by, you must moni-tor Channel 16. Push [[ 99 ]] momentarily to select Channel 16. Push [[CH/WXCH/WX ]] to return to the condition before selecting

Channel 16, or rotate [[CHANNELCHANNEL ]] to select an operatingchannel.

D Channel 9 (Call channel)Each regular channel group has a separate leisure-use callchannel. Call channel is monitored during Tri-watch. Callchannels can be programmed (p. 9) and are used to storeyour most often used channels in each channel group forquick recall. Push [[ 99 ]] 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 afterprogramming a call channel.

Push [[CH/WXCH/WX ]] to return to the condition before selectingcall channel , or rotate [[CHANNELCHANNEL ]] to select an operatingchannel.

Convenient: Using microphone Push [[16/916/9 ]] momentarily to select Channel 16. Push [[16/916/9 ]] for 1 sec. to select call channel.

Push [[ YY ]] / [[ ZZ ]] to select any other operating channel.

Push for

1 sec.

INT25W CALLTAGCALLING

916

1616

INT25WTAGCALLING

Push 916

1616


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3BASIC OPERATION

7

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

nels. These channel groups may be specied for the operat-ing area.

q Push [[CH/WXCH/WX ]] (( U/I/C)U/I/C) to select a regular channel.If a weather channel appears, push [[CH/WXCH/WX ]] (( U/I/C)U/I/C) again.

w While pushing [[HI/LOHI/LO

]] , push [[CH/WXCH/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.

e Rotate [[CHANNELCHANNEL ]] to select a channel. DUP appears for duplex channels.A appears when a simplex channel is selected. b appearswhen a receive only channel for a Canadian channel group is se-lected.

DWeather channelsThere 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. SeeWeather alert on p. 39.q Push [[CH/WXCH/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)

w Rotate [[CHANNELCHANNEL ]] to select a channel.

Push onceor twice

When Weather alert is OFF.

WEATHER

When Weather alert is ON.

WX ALT

CH/WXDW U/I/C

Push +

U.S.A. channels

HI/LO CH/WXDW U/I/C

Canadian channels

CAN

International channels

INT

DUP

USA

DW

DW

DW

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I Receiving and transmittingCAUTION: Transmitting without an antenna may dam-age the transceiver.

q Push [[POWERPOWER ]] to turn power ON.w Set the audio and squelch levels.

Rotate [[SQLSQL ]] fully counterclockwise in advance. Rotate [[VOLVOL ]] to adjust the audio output level. Rotate [[SQLSQL ]] clockwise until the noise disappears.

e To change the channel group, push [[ CH/WXCH/WX ]] (( U/I/C)U/I/C)while pushing [[HI/LOHI/LO ]]. (p. 7)

r Rotate [[CHANNELCHANNEL ]] or push [[ YY ]] / [[ ZZ ]] on the microphoneto select the desired channel. When receiving a signal, BUSY appears and audio is emittedfrom the speaker.

Further adjustment of [[VOLVOL ]] may be necessary. Use the optional Voice scrambler function for privacy. (p. 10)

t Push [[LO/DXLO/DX ]] to turn the receive Attenuator function ON

or OFF, if necessary. LOCAL appears when the receive Attenuator is in use.y Push [[HI/LOHI/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 highpower for longer distance communications.

Some channels are for selecting low power only.

u Push and hold [[PTTPTT ]] 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 83CANNOT be lawfully used by the general public inU.S.A. waters.

i Release [[PTTPTT ]] to receive.

IMPORTANT: To maximize the readability of your trans-mitted signal, pause a few sec. after pushing [[PTTPTT ]], holdthe microphone 2 to 4 inches (5 to 10 cm) from your mouthand speak into (Microphone) at a normal voice level.

WATERPROOF

SCANTAG

DSC/ENTPOS

HI/LOPOWER

VOL

iM502VHF MARINE

SQL

LO/DXIC SCR

CH/WXDW U/I/C 916

DISTRESS

(Microphone)

q

w

e

r rt

y u i

DW

3 BASIC OPERATION

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3BASIC OPERATION

9

I Call channel programmingCall channel is used to select Channel 9 (default), however,you can program the call channel with your most often-usedchannels in each channel group for quick recall.

q While pushing [[HI/LOHI/LO ]], push [[CH/WXCH/WX ]] (( U/I/C)U/I/C) one ormore times to select the desired channel group (U.S.A., In-ternational, Canada) to be programmed.

w Push [[ 99 ]] 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 .e Push [[ 99 ]] again for 3 sec.

(until a long beep changesto 2 short beeps) to entercall channel programmingcondition.

Channel number starts blinking.r Rotate [[CHANNELCHANNEL ]] to se-lect the desired channel.

t Push [[ 99 ]] to program thedisplayed channel as callchannel.Push [[CH/WXCH/WX ]] (( U/I/C)U/I/C) to cancel. The channel number stops blinking.

I Channel commentsMemory 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.

q Select the desired channel. Cancel dualwatch, Tri-watch or scan in advance.

w While pushing [[HI/LOHI/LO ]], push [[ 99 ]] to edit the channelcomment. A cursor appears and blinks.

e Select the desired character by rotating [[CHANNELCHANNEL ]] or

by pushing [[ YY

]] / [[ ZZ

]] on the microphone.Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] to move the cursor forward or back-ward, respectively.

r Push [[ 99 ]] to input and set the comment.Push [[HI/LOHI/LO ]] to cancel.The cursor disappears.

t Repeat steps q to r to program the other channels, if de-sired.

1616

INT25WTAG LEASURE

1616

DW

1616

1616

1616

DW

INT25W CALLTAGCALLING

INT25W CALL

DUPAGINTL

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10

3 BASIC OPERATION

I Optional Voice scrambler operationD Activating the ScramblerThe optional Voice scrambler provides private communica-tions. In order to receive or send scrambled transmissionsyou must rst activate the Scrambler function. To activate thefunction, an optional UT-98 or UT-112 is necessary. See p. 41for setting the scrambler unit. Ask your dealer for details.

The Scrambler function automatically turns OFF whenChannel 16 or 70 is selected.

q Select an operating channel other than Channel 16 or 70.w While pushing [[ HI/LOHI/LO ]], push [[ LO/DXLO/DX ]] (( SCR)SCR) to turn

the optional Scrambler function ON. SC appears.

e To turn the Scrambler function OFF, repeat step w . SC disappears.

D Programming scrambler codesThere are 128 or 32 codes (0 to 127 or 1 to 32) available forprogramming when the optional UT-98 or UT-112 is installed.In order to understand one another, all transceivers in yourgroup must have the same scramble code. This function maynot be available depending on dealer setting.

q Turn power OFF.w While pushing [[ 99 ]], turn power ON to enter Set mode.e After the display appears, release [[ 99 ]].r Push [[ 99 ]] one or more times to select the scrambler

code. Scrambler Code appears.

t Rotate [[CHANNELCHANNEL ]] to select the desired scrambler code.y Turn power OFF, then ON again to exit Set mode.

16161616

1616

IC

Set Mode

Beep

Set Mode

ScramblerCode

Set Mode

ScramblerCode

Enter Set mode Turn OFF

POWER POWER+916 916

Select codePush one ormore times.

Set mode Scrambler code item

[Example]: Programming scrambler code 8.


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11

4DUALWATCH/TRI-WATCHI DescriptionDualwatch monitors Channel 16 while you are receiving an-other channel; Tri-watch monitors Channel 16 and call chan-nel while receiving another channel.

I Operationq Select Dualwatch or Tri-watch in Set mode. (p. 39)w Select the desired operating channel.e Push [[CH/WXCH/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.r To cancel Dualwatch or Tri-watch, push [[CH/WXCH/WX]] (( U/I/C)U/I/C)

again.DW

DW

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

DUALWATCH/TRI-WATCH SIMULATION

If a signal is received on Channel 16, Dualwatch/Tri-watchpauses on Channel 16 until the signal disappears.

If a signal is received on call channel during Tri-watch, Tri-watchbecomes Dualwatch until the signal disappears.

To transmit on the selected channel during Dualwatch/Tri-watch,push and hold [[PTTPTT ]].

Dualwatch Tri-watch

Call channel

INT25W

DUP16

TAGTRI

INT25W

DUP16

TAGTRI

BUSY INT25W CALL

16TAGTRI

BUSY INT25W

DUP16

TAGTRI

Tri-watch starts.

Signal is receivedon call channel.

Signal received onChannel 16 takespriority.

Tri-watch resumesafter the signaldisappears.

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5 SCAN OPERATION

12

I Scan typesScanning is an efcient way to locate signals quickly over awide frequency range. The transceiver has Priority scan andNormal scan.

When the Weather alert function is in use, the selectedweather 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 tagchannels in sequence. However, unlike Priority scan,Channel 16 is not checked unless Channel 16 is set as atag 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


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5SCAN OPERATION

13

INT25W

DUPAG

INTL

INT25W

DUPAG

Normal scan

BUSY INT25W

DUPAG

Normal scan

SCANTAG

Push

Scan starts. When a signal is received

[Example]: Starting a Normal scan.

I Setting tag channelsFor more efficient scanning, add desired channels as tagchannels 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.

q While pushing [[HI/LOHI/LO ]], push [[CH/WXCH/WX ]] (( U/I/C)U/I/C) one ormore times to select the desired channel group.

w Select the desired channel to be set as a tag channel.e Push [[SCANSCAN ]] (( )) for 1 sec. to set the displayed channel

as a tag channel. TAG appears in the display.

r To cancel the tag channel setting, repeat step e . TAG disappears.

Convenient: Clearing (setting) all tagged channels While pushing [[HI/LOHI/LO ]], push [[SCANSCAN ]] (( )) 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.

I Starting a scanSet scan type (Priority or Normal scan) and scan resumetimer in advance using Set mode. (p. 39)

q Set tag channels as described at left.w Make sure the squelch is closed to start a scan.

e While pushing [[HI/LOHI/LO ]], push [[CH/WXCH/WX ]] (( U/I/C)U/I/C) one ormore times to select the channel group, if desired.r Push [[SCANSCAN ]] to start Priority or Normal scan.

Pri Scan 16 or Normal Scan appears in the functiondisplay.

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 [[ CHANNELCHANNEL ]] to check the scanning tag channels, tochange the scanning direction or resume the scan manually.

16 blinks and a beep tone sounds when a signal is receivedon Channel 16 during Priority scan.

t To stop the scan, push [[SCANSCAN ]].

DW

TAG

TAG

DW

5

6


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14

6 DSC OPERATIONI

MMSI code programmingThe 9-digit MMSI (Maritime Mobile Service Identity: DSC selfID) code can be programmed at power ON.

This function is not available when the MMSI code hasbeen programmed by the dealer. This code programmingcan be performed only twice.

q Turn power OFF.w While pushing [[DSC/ENTDSC/ENT ]], turn power ON to enter MMSI

code programming condition.e After the display appears, release [[DSC/ENTDSC/ENT ]].

r Edit the specic MMSI code by rotating [[CHANNELCHANNEL ]].

Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] to move the cursor forward or back-ward, respectively.t Input the 9 digit codes, then push [[DSC/ENTDSC/ENT ]] to set the

code. Returns to the normal operation.

IDSC individual IDA total of 40 DSC address IDs can be programmed and

named with up to 10 characters.

D Programming Address ID/Group IDq Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.

w Rotate [[ CHANNELCHANNEL ]] to select Set up , push[[DSC/ENTDSC/ENT ]].

e Rotate [[ CHANNELCHANNEL ]] to select Add ID , push[[DSC/ENTDSC/ENT ]].

Set upAdd ID

Delete IDOffset Time

Sel ItemPOS ReportDTRS Set

Set up

Set MMSI

23456789


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15

6DSC OPERATION

r Set the individual ID and ID name. Edit the 9 digits of the appropriate distress ID by using [[CHANCHAN --

NELNEL ]].-Push [[ CH/WXCH/WX ]] or [[ SCANSCAN ]] to move the cursor forward orbackward, respectively.1st digit 0 is fixed for a group ID. Thus an address ID inputcannot start with 0. When you input 1st digit 0 and other 8

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

t Push [[DSC/ENTDSC/ENT

]] to program and exit the condition to thenormal operation.

D Deleting Address ID/Group IDq Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w Rotate [[ CHANNELCHANNEL ]] to select Set up , push

[[DSC/ENTDSC/ENT ]].e Rotate [[ CHANNELCHANNEL ]] to select Delete ID , push

[[DSC/ENTDSC/ENT ]].When no address ID is programmed, the transceiver exits theDSC menu automatically.

r Rotate [[ CHANNELCHANNEL ]] to select the desired ID name fordeleting.

t The delete confirmation display will appear when[[DSC/ENTDSC/ENT ]] is pushed.Push [[HI/LOHI/LO ]] to delete ID and exit the DSC Menu.Push [[DSC/ENTDSC/ENT ]] to cancel deleting and exit the DSC Menu.

Delete ID

RickyBill

Tom

Set upAdd ID

Delete IDOffset Time

Add IDID:NAME:

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16

6 DSC OPERATION

IPosition and Time programming

A distress call should include the ships position and time. Ifno GPS is connected, your position and UTC (Universal TimeCoordinated) 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.

q Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w POS Input is selected automatically, push [[DSC/ENTDSC/ENT]].

e Edit the digit of your latitude data by using [[CHANNELCHANNEL ]].

Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] to move the cursor forward or back-ward, respectively. After editing latitude data, select N; North latitude or S ; Southlatitude.

Push [[HI/LOHI/LO ]] to clear the position data.

r Edit the digit of your longitude data by using [[CHANNELCHANNEL ]].Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] for cursor movement.After editing longitude data, select E ; East longitude or W;West longitude.

Push [[HI/LOHI/LO ]] to clear the position data.

t Push [[DSC/ENTDSC/ENT ]] to set the position and advance to thetime setting condition.Push [[ 99 ]] or [[ LO/DXLO/DX ]] to abandon the setting and exit theDSC menu.

y Edit the digit of the current UTC time by using [[ CHANCHAN --NELNEL ]].Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] for cursor movement.Push [[HI/LOHI/LO ]] to clear the time data.

u Push [[DSC/ENTDSC/ENT ]] to set the time, and exit the DSC menu.Push [[ 99 ]] or [[ LO/DXLO/DX ]] to abandon the setting and exit theDSC menu.

1616

Input timeUTC :

Null[H/L]

1616

Input POS .

- .Null[H/L]


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17

6DSC OPERATION

IPosition/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 displaysthe manually entered position and time.

A GPS receiver appropriate for the IC-M502A is not suppliedfrom Icom. A GPS receiver with NMEA0183 ver. 2.0 or 3.01format is required for position indication. Ask your dealerabout suitable GPS receivers.

Push [[DSC/ENTDSC/ENT ]] (( )) for 1 sec. to display the current po-

sition and time. MNL (manual) appears instead of the GPS indication whenno GPS is connected and the position/time data is entered man-ually.

When connecting GPS receiver is compatible severalsentence formatteres, the order of input precedence isRMC, 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 indicationswhen the GPS data is invalid, or has not been manuallyupdated after 4 hours.

3434.123N13534.123EJUL17 11:47CALLING

3434.123N13534.123EGPS UTC11:47CALLING

3434.123N13534.123EGPS LOC01:47CALLING

Sentence formatter RMC

Sentence formatteres GGA, GNS, GLL

No offset time Offset time is10 hours. (p.34)

3434.123N13534.123E

GPS UTC12:34CALLING

POS

6


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18

6 DSC OPERATION

IDistress call

A Distress call should be transmitted, if in the opinion of theMaster, 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. ADISTRESS CALL CAN BE USED ONLY WHEN IMMEDIATE HELP IS NEEDED.

D Simple callq Conrm no Distress call is being received.w While lifting up the switch cover, push [[DISTRESSDISTRESS ]] for 5

sec. to transmit the Distress call.Emergency channel (Ch 70) is automatically selected and theDistress call is transmitted.

When no GPS is connected, input your position and UTC time, ifpossible.

e After transmitting the call, the transceiver waits for an ac-knowledgment call on Ch 70.The Distress call is automatically transmitted every 3.5 to 4.5minutes.

r After 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 3.54.5 min., until re-

ceiving an acknowledgement. Push [[DISTRESSDISTRESS ]] to transmit a renewed Distress call,

if required. Push any key (except [[DISTRESSDISTRESS ]]) to cancel the Call

repeat mode. ?? may blink instead of position and time indications

when the GPS data is invalid, or has not been manuallyupdated after 4 hours.

< Tokyo CGDistress ACKReceived

DistressCompleted

Wait for ACK

Distress TX3523.123N

13535.123EGPS UTC12:34


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19

6DSC OPERATION

D Normal callThe nature of the Distress call should be included in the Dis-tress call.

q Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w Rotate [[ CHANNELCHANNEL ]] to select DTRS Set , push

[[DSC/ENTDSC/ENT ]].

e Rotate [[CHANNELCHANNEL ]] to select the nature of the distress,

push [[DSC/ENTDSC/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 afterprogramming is nished.

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

ExplosionUndesign

Flooding

Sel ItemPOS ReportRCV Calls

DTRS Set

6

r The position information appears. Set the current posi-tion, push [[DSC/ENTDSC/ENT ]].

Edit the digit of your position data by using [[CHANNELCHANNEL ]].-Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] 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/LOHI/LO ]] to clear the position data.

t The time information appears. Set the current UTC time,push [[DSC/ENTDSC/ENT ]].

Edit the digit of the current UTC time by using [[CHANNELCHANNEL ]].

-Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] for cursor movement.-Push [[HI/LOHI/LO ]] to clear the time data.

Input timeUTC :

Null[H/L]

Input POS .

- .Null[H/L]


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20

6 DSC OPERATION

y Push [[DISTRESSDISTRESS ]] for 5 sec. to transmit the Distress call.

u After transmitting the call, the transceiver waits for an ac-

knowledgment call on Ch 70.The Distress call is automatically transmitted every 3.5 to 4.5minutes.

i After 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 3.54.5 min., until re-

ceiving an acknowledgement. Push [[DISTRESSDISTRESS ]] to transmit a renewed Distress call,

if required. Push any key (except [[DISTRESSDISTRESS ]]) to cancel the Call

repeat mode. ?? may blink instead of position and time indications

when the GPS data is invalid, or has not been manuallyupdated after 4 hours.

< Tokyo CGDistress ACKReceived

DistressCompleted

Wait for ACK

Set is OK

Push [DTRS]for 5 sec


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6DSC OPERATION

6

ITransmitting DSC calls

D Transmitting Individual callThe Individual call function allows you to transmit a DSC sig-nal to a specic ship only.

q Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w Rotate [[ CHANNELCHANNEL ]] to select Individual , push


e Rotate [[CHANNELCHANNEL ]] to select the desired pre-programmedindividual address or Manual Input , push[[DSC/ENTDSC/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 byusing [[CHANNELCHANNEL ]].-Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] for cursor movement.-After 9-digit is input, push [[DSC/ENTDSC/ENT ]] to set the ID code.

r Rotate [[CHANNELCHANNEL ]] to select a desired intership channelor Manual Input , push [[DSC/ENTDSC/ENT ]].When Manual Input is selected, rotate [[CHANNELCHANNEL ]] toselect the desired channel other than Channel 70, push[[DSC/ENTDSC/ENT ]].

t Push [[DSC/ENTDSC/ENT ]] to transmit the Individual call. If Channel 70 is busy, the transceiver stands by until the channelbecomes 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

6908

77

Sel Address

RickyManual Set

Tom

IndividualPOS Input

Group

Sel Item

6


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6 DSC OPERATION

y After transmitting the Individual call, standby on Channel70 until an acknowledgement is received.

u When the acknowledgement is received, the displaychanges to the previously selected channel with beeps.

i Push and hold [[ PTTPTT ]] to communicate your message tothe responding ship.

D Transmitting Individual acknowledgementTransmit an acknowledgement (able to comply or unable tocomply) when an Individual call for you is received.

q Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w Rotate [[ CHANNELCHANNEL ]] to select INDV ACK , push

[[DSC/ENTDSC/ENT ]]. INDV ACK item appears after an Individual call is received.

e Rotate [[ CHANNELCHANNEL ]] to select the desired individual ad-dress or ID code, push [[DSC/ENTDSC/ENT ]].

Sel Address

TomRicky

Sel ItemPOS InputIndividual

INDV ACK

Received

< Tom

Able ACKRoutine

Individual

Wait for ACK

Completed

6


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23

6DSC OPERATION

6

r Rotate [[ CHANNELCHANNEL ]] to select an acknowledgementAble or Unable , push [[DSC/ENTDSC/ENT ]].

t If you select Unable , select the reason by rotating[[CHANNELCHANNEL ]], push [[DSC/ENTDSC/ENT ]]. No reason given, Congestion, Busy, Queue indication, Sta-tion Barred, No operator, Operator Unavailable, EquipmentDisable, Channel Unable and Mode Unable are available.

y Push [[DSC/ENTDSC/ENT ]] to transmit the acknowledgement to theselected station.

u After the Individual acknowledgement has been transmit-ted, the display changes to the channel specified by thecalling station, automatically.

INDV ACKCompleted

To Call,

To Cancel[other]

[DSC/ENT]

Sel Reason

CongestionBusy

No Reason

Comply

UnableAble

6


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24

6 DSC OPERATION

D Transmitting Group callThe Group call function allows you to transmit a DSC signalto a specic group only.

q Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w Rotate [[ CHANNELCHANNEL ]] to select Group , push


e Rotate [[ CHANNELCHANNEL ]] to select the desired pre-pro-

grammed group address or Manual Input , push[[DSC/ENTDSC/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[[CHANNELCHANNEL ]].-Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] for cursor movement.-After 9-digit is input, push [[DSC/ENTDSC/ENT ]] to set the ID code.

r Rotate [[CHANNELCHANNEL ]] to select a desired intership channelor Manual Input , push [[DSC/ENTDSC/ENT ]]. When Manual Input is selected, rotate [[CHANNELCHANNEL]] to se-lect the desired channel other than Channel 70, push [[DSC/ENTDSC/ENT]].

t Push [[DSC/ENTDSC/ENT ]] to transmit the Group call. If Channel 70 is busy, the transceiver stands by until the channelbecomes clear.

y After the Group call has been transmitted, the displaychanges to the previously selected channel.

u Push and hold [[PTTPTT]] to communicate your message to the

responding ship or push [[DSC/ENTDSC/ENT]] to exit the condition.

GroupCompleted

To Call,

To Cancel[other]

[DSC/ENT]

Sel Channel

6713

72

Sel Address

Smith GrpManual Set

Osaka Grp

Sel ItemIndividualINDV ACK

Group

6DSC OPERATION


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25

6DSC OPERATION

6

D Transmitting All Ships callLarge ships use Channel 70 as their listening channel. Whenyou want to announce a message to these ships, use the AllShips Call function.

q Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w Rotate [[ CHANNELCHANNEL ]] to select All Ships , push


e Push [[DSC/ENTDSC/ENT ]] to transmit the All Ships call. Channel 70 is selected and the All Ships call is transmitted. Routine category only is available.

r After the All Ships call has been transmitted, the displaychanges to Channel 16 automatically.

t Push any key to exit the condition and the display returnsto the normal operation.

All ShipsCompleted

To Call,

To Cancel

[other]

[DSC/ENT]

Sel ItemINDV ACKGroup

All Ships

6 DSC OPERATION


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6 DSC OPERATION

D Transmitting Position Request callTransmit a Position Request call when you want to know aspecic ships current position, etc.

q Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w Rotate [[ CHANNELCHANNEL ]] to select POS Request , push



grammed individual address or Manual Input , push[[DSC/ENTDSC/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 byusing [[CHANNELCHANNEL ]].-Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] for cursor movement.-After 9-digit is input, push [[DSC/ENTDSC/ENT ]] to set the ID code.

r Push [[DSC/ENTDSC/ENT ]] to transmit the Position Request call.

t After the Position Request call has been transmitted, thefollowing indication is displayed.

y Push any key to exit the condition and return to the normaloperation.

POS REQ

Wait for ACK

Completed

To Call,

To Cancel[other]

[DSC/ENT]

Sel Address

RickyManual Set

Tom

Sel ItemGroupAll ships

POS Request

6DSC OPERATION


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6DSC OPERATION

6

D Transmitting Position Report callTransmit a Position Report call when you want to announceyour own position to a specic ship and to get answer, etc.

q Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w Rotate [[ CHANNELCHANNEL ]] to select POS Report , push



grammed individual address or Manual Input , push[[DSC/ENTDSC/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 byusing [[CHANNELCHANNEL ]].

-Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] for cursor movement.-After 9-digit is input, push [[DSC/ENTDSC/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

RickyManual Set

Tom

Sel ItemAll shipsPOS Request

POS Report

r The position information appears. Set the current posi-tion, push [[DSC/ENTDSC/ENT ]].

Edit the digit of your position data by using [[CHANNELCHANNEL ]].-Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] 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/LOHI/LO ]] to clear the position data.

t The time information appears. Set the current UTC time,push [[DSC/ENTDSC/ENT ]].

Edit the digit of the current UTC time by using [[CHANNELCHANNEL ]].

-Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] for cursor movement.-Push [[HI/LOHI/LO ]] to clear the time data.

Input timeUTC :

Null[H/L]

Input POS

.- .Null[H/L]

6 DSC OPERATION


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6 DSC OPERATION

y Push [[DSC/ENTDSC/ENT ]] to transmit the Position Report call.

u After the Position Report call has been transmitted, the fol-

lowing indication is displayed

i Push any key to exit the condition and return to the normaloperation.

D Transmitting Position Reply callTransmit a Position Reply call when a Position Request call isreceived.

q When a Position Request call is received, the following in-dication is displayed.

w Push [[ DSC/ENTDSC/ENT ]] to reply to the Position Request call;push other key to ignore the Position Request call.

D Transmitting Position Report Reply callTransmit a Position Report Reply call when a Position Reportcall is received.

q When a Position Report call is received, the following in-

dication is displayed.

w Push [[DSC/ENTDSC/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]< RickyPOS Request

POS Report

Wait for ACK

Completed

To Call,

To Cancel[other]

[DSC/ENT]

6DSC OPERATION


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6DSC OPERATION

6

IReceiving DSC callsD Receiving 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.

D Receiving a Distress acknowledgementWhile 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.

D Receiving an Individual callWhile 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/ENTDSC/ENT ]] to change to the channel specified bythe calling station for voice communication; push other key

to ignore the Individual call.

D Receiving a Group callWhile 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/ENTDSC/ENT ]] to change to the channel specified bythe calling station for voice communication; push other keyto ignore the Group call.

RoutineGroup

< Smiths Grp

Received

RoutineIndividual

< Tom

Received

< Tokyo CG> 111222345

Distress ACKReceived

< 111222345DistressReceived

6 DSC OPERATION


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30

6 DSC OPERATION

D Receiving an All Ships callWhile 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/ENTDSC/ENT ]] to change to the channel specified bythe calling station for voice communication; push other keyto ignore the All Ships call.

Monitor the channel for an announcement from the callingvessel.

D Receiving a Distress Relay callWhile 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.

D Receiving a Distress Relay acknowledgementWhile 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.

D Receiving a Geographical Area callWhile 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/ENTDSC/ENT ]] to change to the channel specified by

the calling station for voice communication; push other keyto ignore the Geographical Area call.

Monitor the selected channel for an announcement fromthe calling station.

When no GPS receiver is connected or if there is a prob-lem with the connected receiver, all Geographical Areacalls are received, regardless of your position.

RoutineGeographic

< Tokyo CG

Received

< Osaka BayRoutineAll ShipsReceived

6DSC OPERATION


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6

6

D Receiving a Position Request callWhile monitoring Channel 70 and a Position Request call isreceived: Received POS Request appears in the display.

Push [[ DSC/ENTDSC/ENT ]] to reply to the Position Request call;push other key to ignore the Position Request call.

D Receiving a Position Reply call

While monitoring Channel 70 and a Position Reply call is re-ceived: Received POS appears in the display.

D Receiving a Position Report callWhile monitoring Channel 70 and a Position Report call is re-ceived: Received POS Report appears in the display.

Push [[DSC/ENTDSC/ENT ]] to reply to the call; push other key to ig-nore the Position Report call.

D Receiving a Position Report Reply callWhile monitoring Channel 70 and a Position Report Reply callis received: Received POS appears in the display.

3030.123N< RickyReceived POS

13030.123E

POS ReportReceived

Ans[DSC/ENT]

3434.123N< TomReceived POS

13534.123E

< RickyPOS Request

Received

Ans[DSC/ENT]

6 DSC OPERATION


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I Received messagesThe transceiver automatically stores up to 20 distress mes-sages and 20 other messages. The messages can be usedas an assistance to the logbook.

q Push [[DSC/ENTDSC/ENT ]] to select the DSC menu.

w Rotate [[ CHANNELCHANNEL ]] to select RCV Calls , push[[DSC/ENTDSC/ENT ]].

D Distress messageq Rotate [[ CHANNELCHANNEL ]] to select Distress , push


w Rotate [[ CHANNELCHANNEL ]] to scroll to the desired message,push [[DSC/ENTDSC/ENT ]].When some messages are blinking, the messages have not

been read.

e Rotate [[CHANNELCHANNEL ]] to scroll the message.

r Push [[DSC/ENTDSC/ENT ]] to exit the DSC menu or push [[HI/LOHI/LO ]]to clear the displayed message and returns to the normal

operation.To ClearThis DataNo [DSC/ENT]Yes [H/L]

Distress< 123123123ExplosionUTC: 12:48

3243.212N12345.221W

To ClearThis DataNo [DSC/ENT]Yes [H/L]

Sel DTRS MSG123123123

111222345Chuck 3

Sel Messege

DistressOther

Sel ItemRCV Calls

DTRS SetSet up

6DSC OPERATION


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6

D Other messagesq Rotate [[ CHANNELCHANNEL ]] to select Other , push


w Rotate [[ CHANNELCHANNEL ]] to scroll to the desired message,push [[DSC/ENTDSC/ENT ]].When some messages are blinking, the messages have notbeen read.

e Rotate [[CHANNELCHANNEL ]] to scroll the message. The stored message has various information and depending onthe type of distress calls.

r Push [[DSC/ENTDSC/ENT ]] to exit the DSC menu or push [[HI/LOHI/LO ]]

to clear the displayed message and returns to the normaloperation.


All Ships< TomRoutineF3E Simplex

CH08


Sel Messege

All Ships

POS RequestIndividual

Sel MessegeDistress

Other

6 DSC OPERATION


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I DSC Set modeD Add Address ID (See p.14 for detail)D Delete Address ID (See p.15 for detail)

D Offset timeThis item sets the offset time from the UTC (Universal TimeCoordinated) time.

q Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w Rotate [[ CHANNELCHANNEL ]] to select Set up , push


e Rotate [[ CHANNELCHANNEL ]] to select Offset time , push[[DSC/ENTDSC/ENT ]].

r Set the offset time from the UTC (Universal Time Coordi-nated) time. Edit the digit of offset time by using [[CHANNELCHANNEL ]].

-Push [[CH/WXCH/WX ]] or [[SCANSCAN ]] for cursor movement.-Push [[DSC/ENTDSC/ENT ]] to set the offset time.

Rotate [[CHANNELCHANNEL ]] to edit or delete - , when the cursor is onthe rst digit.

t Push [[DSC/ENTDSC/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-ceivers display indicates UTC time only.

Offset Time00:00

Offset Time-12:00

No offset time (default) 12 hours

Set upAdd IDDelete ID

Offset Time

Sel ItemRCV CallsDTRS Set

Set up

6DSC OPERATION


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6

D MMSI code check The programmed 9-digit MMSI (DSC self ID) code can bechecked in DSC Set mode.

q Push [[DSC/ENTDSC/ENT ]] to enter the DSC menu.w Rotate [[ CHANNELCHANNEL ]] to select Set up , push


e Rotate [[ CHANNELCHANNEL ]] to select MMSI Check , push


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

t Push [[DSC/ENTDSC/ENT ]] to exit the DSC menu.

MMSI Check123456789

Set upDelete IDOffset Time

MMSI Check

Sel ItemRCV CallsDTRS Set

Set up

7 OTHER FUNCTIONS


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I Intercom operationThe optional Intercom function allows you to talk to the deckfrom 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.

q Push [[LO/DXLO/DX ]] (( SCR)SCR) for 1 sec. to enter Intercom mode. The HM-127 power is automatically turned ON, even if the poweris OFF.

w Push and hold [[LO/DXLO/DX ]] (( SCR)SCR) again to call up. The transceiver and microphone emit call beeps.

e Push and hold the PTT switch and speak at a normal voicelevel into the microphone. TALK or LSTN appears on the caller or listener function dis-play, respectively.

To adjust the IC-M502As speaker output level, rotate [[VOLVOL ]].

To adjust the HM-127s speaker output level, push after [[VOLVOL ]]pushing [[ YY ]] / [[ ZZ ]].

r After releasing the PTT switch you can hear the responsethrough the speaker.

t To return to the normal operation, push [[LO/DXLO/DX ]] (( SCR)SCR)momentarily. Other keys also turn the function OFF, however, the correspond-

ing function is then activated (e.g. pushing [[ 99 ]] selects Chan-nel 16).

While in the Intercom mode, the transceiver functions(transmit and receive) are interrupted. If the transceiver isin 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 displayedafter the Intercom use is nished.

When a WX alert is received, WX ALT blinks and abeep sounds. The WX alert sounds after the Intercom useis nished.

1616

IC

Intercom

INTINT

TALK

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

IC

Intercom

INTINT

IC-M502A HM-127

IC

7OTHER FUNCTIONS


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7

I Microphone lock functionThe Microphone lock function electrically locks the [[ YY ]] / [[ ZZ ]]and [[16/916/9 ]] keys on the supplied microphone. This preventsaccidental channel changes and accidental function access.

While pushing [[16/916/9 ]] on supplied microphone, turn power

ON to toggle the Lock function ON or OFF.

I Display backlightingThe function display and keys can be backlit for better visibil-ity under low light conditions.

While pushing [[HI/LOHI/LO ]], rotate [[CHANNELCHANNEL ]] to adjust thebrightness of the LCD and key backlight.

The backlight level is adjustable in 7 levels. No backlight level indication is available.

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

8 SET MODE


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Beep toneBeep

Scan modeScan Mode

Weather alertWX Alert

Scan resume timerScan Timer

Attenuation levelAttenuationLevel

Internal speakerInternalSpeaker

Scrambler code*ScramblerCode

Scrambler type*ScramblerType

Dual/tri watchDUAL/TRI

DSC watchDSC Watch

LCD contrastLCDContrast

Automatic acknowledgementAUTO ACK

Push 916

*The scrambler set itemsare only available when ascrambler unit is installed.

Push when using HM-127

DSC Watch , Internal Speaker and AUTO ACK items are not selectablewhen using HM-127.

I Set mode programmingSet mode is used to change the conditions of the trans-ceivers functions: scan mode (Normal or Priority), scan re-sume timer, weather alert, Dualwatch/Tri-watch selection,DSC watch, transceivers 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 its own settings for the beeptone and LCD contrast.

q Turn power OFF.w While pushing [[ 99 ]], turn power ON to enter Set mode.e After the display appears, release [[ 99 ]].r Push [[ 99 ]] to select the desired item.

Or push [[ ]] ((99 )) on the HM-127 to select the item when

using an optional HM-127.t Rotate [[CHANNELCHANNEL ]] to select the desired condition of theitem. Use [[ YY ]] / [[ ZZ ]] when using an optional HM-127.

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

16161616

16161616

SET MODE CONSTRUCTION

8SET MODE


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I Set mode itemsD Scan modeThe transceiver has 2 scan modes: Normal scan and Priorityscan. Normal scan searches all tag channels in the selectedchannel group. Priority scan searches all tag channels in se-quence while monitoring Channel 16.

D Scan resume timerThe scan resume timer can be selected as a pause (OFF) ortimer scan (ON). When OFF is selected, the scan pausesuntil the signal disappears. When ON is selected, the scanpauses 5 sec. and resumes even if a signal has been re-

ceived on any other channel than Channel 16.

D Weather alertA NOAA broadcast station transmits a Weather alert tone be-fore important weather information. When the Weather alertfunction 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 standbyor while scanning. WX ALT appears instead of WEATHER indication when thefunction is set ON.

D Dual/Tri-watchThis item sets the [[CH/WXCH/WX ]] (( U/I/C)U/I/C) key function as Dual-watch or Tri-watch.

Set Mode

DUAL/TRI

Dualwatch (default) Tri-watch

DW

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

8

8 SET MODE


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D DSC watchDSC watch monitors Channel 70 while you are receiving an-other channel.If a distress signal is received on Channel 70, the transceivermonitors 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 channelgroups depending on dealer setting.

D Beep toneYou can select silent operation by turning beep tones OFF, oryou can have conrmation beeps sound at the push of a keyby turning beep tones ON.

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

D Internal speakerWhen an external speaker is connected and the transceiversinternal speaker is not required, the speaker on the trans-ceiver and microphone can be deactivated.

SP OFF appears on the function display when the internalspeaker is turned OFF.

The order of indication precedence is SP OFF , LOCAL andCALL .

D LCD contrastThis 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

LCDContrast

LCD contrast 4 (default)

Set Mode

InternalSpeaker

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

8SET MODE


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D Attenuation levelThis item sets the receive attenuation level for the Attenuatorfunction from 3 levels.

D Scrambler code(Appears when a scrambler unit is installed)

When an optional scrambler unit is installed, the scramblercode can be set depending on dealer setting.When the UT-98 or UT-112 is installed, 128 or 32 codes (0 to127 or 1 to 32) can be selected.

D Scrambler type(Appears when a scrambler unit is installed)

When an optional scrambler unit is installed, the scramblertype can be selected in Set mode depending on dealer set-ting.

D Automatic acknowledgementThis item sets the Automatic acknowledgement function ONor OFF.

When Position Request or Position Report call is received,transceiver automatically transmits Position Reply or PositionReport Reply, respectively.

Set Mode

AUTO ACK

Auto ACK OFF (default) Auto ACK ON

Set Mode

ScramblerType

UT-112 scrambler unit UT-98 scrambler unit

Set Mode

ScramblerCode

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

Set Mode

AttenuationLevel

Attenuation level 1 (default)

8

9 CONNECTIONS AND MAINTENANCE


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I Supplied accessoriesThe following accessories are supplied: Qty.q Mounting bracket ............................................................ 1w Microphone hanger ......................................................... 1e Mic hanger screws (3 16) ............................................ 2r Mounting screws (5 20) ............................................... 4t Flat washers (M5) ........................................................... 4y Spring washers (M5) ...................................................... 4u Knob bolts for mounting bracket...................................... 2i DC power cable (OPC-891) ........................................... 1o Warning sticker ............................................................... 1!0 RCA connector cable Red (OPC-1278) .......................... 1!1 RCA connector cable White (OPC-1279) ....................... 1

I AntennaA key element in the performance of any communication sys-tem is an antenna. Ask your dealer about antennas and thebest place to mount them.

IFuse replacement

One fuse is installed in the supplied DC power cable. If a fuseblows or the transceiver stops functioning, track down thesource of the problem, if possible, and replace the damagedfuse with a new, rated one.

I CleaningIf the transceiver becomes dusty or dirty, wipe it clean with asoft, dry cloth.

AVOID the use of solvents such as benzene or al-cohol, as they may damage transceiver surfaces.

Fuse rating: 10 A

q we

r

t

y

ui

W A R N I N G

o!0

!1

42

9CONNECTIONS AND MAINTENANCE


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I Connections

q DC POWER CONNECTOR

Connects the supplied DC power cable from this connectorto an external 13.8 V DC power source.

w EXTERNAL MICROPHONE JACKSConnects to optional HM-127 REMOTE-CONTROL MICRO-PHONE .

CAUTION: NEVER connect other microphones, suchas the HM-134, as this may cause damage to the transceiver.

e ANTENNA CONNECTORConnects a marine VHF antenna with a PL-259 connector.

CAUTION: Transmitting without an antenna may dam-age the transceiver.

r NMEA 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 yourdealer about suitable GPS receivers.

Connects to a PC or navigation equipment (NMEA0183ver. 3.01 sentence formatters DSC, DSE compatible) forplotting received other ships position data.

t EXTERNAL 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 shownbelow, to prevent water seeping into the transceiver.

Rubber vulcanizingtape

NMEA OUT (+)

RCA

NMEA OUT ()

NMEA IN (+)

RCA

NMEA IN ()

q

w

e

t

r

9



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I Mounting the transceiverD Using the supplied mounting bracketThe universal mounting bracket supplied with your transceiverallows 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 andcan support more than 5 kg.

Mount the transceiver so that the face of the transceiver is at90 to your line of sight when operating it.

CAUTION: KEEP the transceiver and microphone at

least 1 meter away from your vessels magnetic navigationcompass.

NOTE: Check the installation angle; the function displaymay 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



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D Using the optional MB-75An optional MB-75 FLUSH MOUNT is available for mountingthe transceiver to a at surface such as an instrument panel.

CAUTION: KEEP the transceiver and microphone atleast 1 meter away from your vessels magnetic navigationcompass.

q Using the template on the last page, carefully cut a holeinto the instrument panel (or wherever you plan to mountthe transceiver).

w Slide the transceiver through the hole as shown below.

e Attach the 2 supplied bolts (M5 8 mm) on either side ofthe IC-M502A.

r Attach the clamps on either side of the IC-M502A.

Make sure that the clamps align parallel to the IC-M502As body.

t Tighten the end bolts on the clamps (rotate clockwise) so

that the clamps press firmly against the inside of the in-strument control panel.

y Tighten the locking nuts (rotate counterclockwise) so thatthe IC-M502A is securely mounted in position as below.

u Connect the antenna and power cable, then return the in-strument control panel to its original place.

9



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I Optional unit installationCAUTION: DISCONNECT the DC power cable from thetransceiver 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 youwant to install an optional unit.

q Remove the 6 screws as shown below and open the trans-ceiver.

w Remove the 4 screws from the shielding plate, then lift upthe shielding plate.

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

unit as shown below.

r Return the shielding plate and assemble the units to theiroriginal positions.

CAUTION: When re-assembling the case and tightening the screws,

you must keep the specied torque (0.70.1 N.m). Oth-erwise the transceiver may be damaged (torque too high)or lose waterproof efciency (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



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I Dimensions145.0 (5 23 32)

165.0 (6 1 2)31.4

(1 1 4)53.0

(2 3 32) Unit: mm (inch)

1 1 0

. 0 ( 4 1 1 3 2

)

1 0 9

. 4 ( 4 5 1 6

)

9

10 TROUBLESHOOTING


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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 fromthe 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. 8p. 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, 49p. 8

Scan does not start. TAGchannel 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. 40p. 8

Receive signal cannotbe understood.

Optional voice scrambler is turned OFF. Scramble code is not set correctly.

Turn the optional voice scrambler ON. Reset the scramble code.

p. 10p. 41

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

Distress call cannot betransmitted.

MMSI (DSC self ID) code is not pro-grammed.

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

11CHANNEL LIST


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Channel number

USA CAN Transmit Receive01 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 08 156.400 156.40009 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)

INT01

02

03

04

05

06

07

0809

10

11

12

13

14

15

16

17

18

Channel number Frequency (MHz)

USA CAN Transmit Receive19A 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

20

21

22

23

24

25

26

27

28

60

61

62

63

64

20A 157.000 157.000

Channel number

66A

Frequency (MHz)

66A


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 74 156.725 156.72577 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

66

67

68

69

70

71

72

73

7477

78

79

80

81

82

156.325 156.32566A

Channel number

84A

Frequency (MHz)


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 88 157.425 162.02588A 157.425 157.425

INT

84

85

86

87

88

157.225 157.225

WX channel

4

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

1011

12 SPECIFICATIONS AND OPTIONS


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I Speci cationsD General Frequency coverage :

Transmit 156.025157.425 MHzReceive 156.050163.275 MHz

Mode : FM (16K0G3E)

DSC (16K0G2B) Channel spacing : 25 kHzCurrent 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

(20C to +60C; 4F to +140F) Dimensions : 165(W) 110(H) 109.4(D) mm(Projection not included) 6 1 2(W) 4 11 32(H) 4 5 16(D) in

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

D Transmitter Output power : 25 W / 1 WModulation system : Variable reactance phase

modulation Max. frequency deviation : 5.0 kHz

Spurious emissions : 70 dBc

D Receiver Receive system : Double conversion

superheterodyne Sensitivity (12 dB SINAD) : 0.22 V (typical)

Squelch sensitivity : 0.22 V (typical) Intermodulation rejection ratio: More than 75 dBSpurious response : More than 75 dBrejection ratio

Adjacent channel selectivity : More than 75 dBAudio output power : 4.5 W (typical) at 10% distortion

with a 4 load

All stated specifications are subject to change withoutnotice or obligation.

12SPECIFICATIONS AND OPTIONS


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I Options MB-75 FLUSH MOUNTFor mounting the transceiver to a panel.

SP-5 EXTERNAL SPEAKERA large, external speaker for superior audio output.

SP-10 EXTERNAL SPEAKERA 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 (forUT-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 CABLE6 m (20 feet) microphone extension cable for optionalHM-127. Up to 2 OPC-999 can be connected. (18 m; 60 feetmaximum)

12

13 HM-127 REMOTE-CONTROL MICROPHONE OPTION


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I Panel descriptionThe optional HM-127 remotely controls the IC-M502A andprovides an optional Intercom function.

D Front and side keys

q PTT SWITCH [[PTTPTT ]] (pgs. 8, 57)Push and hold to transmit; release to receive.

w CHANNEL UP/DOWN KEYS [[ YY ]] / [[ 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 squelchlevel after [[ VOLVOL ]] or [[ SQLSQL ]] is pushed, respectively.(pgs. 8, 57)

Push either key to adjust the brightness of the LCD andkey backlight after [[VOLVOL]] 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)

e CHANNEL 16/CALL CHANNEL KEY [[ ]] ((99 )) 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/LH/L ]] , enters channel comments pro-

gramming condition. (pgs. 9, 63) Enters Set mode when pushed while turning power ON.

(pgs. 38, 62)

1616

Top keys

q

ew

ytr

u

13HM-127 REMOTE-CONTROL MICROPHONE


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r CHANNEL/DUALWATCH/TRI-WATCH KEY

[[CH/WXCH/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/LH/L ]], selects one of 3 regular channels

in sequence when pushed. (pgs. 7, 56) International, U.S.A. and Canadian channels are available forregular channels.

Starts Dualwatch or Tri-watch when pushed for 1 sec.(pgs. 11, 60)

Stops Dualwatch or Tri-watch when either is activated.t ATTENUATOR/INTERCOM/SCRAMBLER KEY

[[LO/DXLO/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/LH/L ]], activates an optional Voice scram-bler function. (pgs. 10, 60)The optional Voice scrambler function cannot be used onChannel 16 and 70.

y SQUELCH/MONITOR/LOCK KEY [[SQLSQL ]] (( L)L)

[[ YY ]] / [[ ZZ ]] sets the squelch threshold level after pushing[[SQLSQL ]]. (p. 57)

Push [[SQLSQL ]] (( L)L) for 1 sec. to turn the monitor func-tion ON. (p. 59)

While pushing [[H/LH/L ]], push [[SQLSQL ]] (( L)L) to toggle the(microphone) Key lock function ON or OFF. (p. 58) T appears while Key lock function is in use. [[PWRPWR ]], [[PTTPTT ]], [[VOLVOL ]], [[SQLSQL ]] and [[H/LH/L ]] still function whenthe (microphone) Key lock function is turned ON.

Advance the cursor while in channel comment program-ming condition. (pgs. 9, 63)

u VOLUME/DIMMER KEY [[VOLVOL ]] (( )) [[ YY ]] / [[ ZZ ]] adjusts the audio level after pushing [[ VOLVOL ]]

(p. 57) Push [[VOLVOL ]] (( )) 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

DIM

MONI

MONI

MONI

IC

DW

13


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e CHANNEL 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)

r VOLUME INDICATOR (p. 57)Appears while audio output level is adjusted.

t SQUELCH INDICATOR (p. 57)Appears while noise squelch level is adjusted.

y CHANNEL COMMENT INDICATOR

Channel comment appears (and scrolls) if programmed.(pgs. 9, 63)

In Set mode, indicates or scrolls the selected Set modeitem. (pgs. 38, 62)

u ATTENUATOR INDICATOR (pgs. 8, 57)Appears when the RF Attenuator is in use.

i SCRAMBLER INDICATOR (pgs. 10, 60)Appears when an optional Voice scrambler is activated.

o SCAN 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 orDual/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 squelchopens.

!8 TRANSMIT INDICATOR (pgs. 8, 57)

Appears while transmitting.

13

13 HM-127 REMOTE-CONTROL MICROPHONE


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I Channel selectionD Channel 16q Push [[ ]] to select Channel 16.w Push [[ CH/WXCH/WX ]] to return to the

condition before selecting Chan-nel 16, or push [[ YY ]] or [[ ZZ ]] to se-

lect an operating channel.

D Call channelq Push [[ ]] ((99 )) for 1 sec. to select

call channel.

w Push [[ CH/WXCH/WX ]] to return to thecondition before selecting callchannel, or push [[ YY ]] or [[ ZZ ]] toselect an operating channel.

D Weather channelsq Push [[ CH/WXCH/WX ]] once or twice toselect the weather channel group.

w Push [[ YY ]] or [[ ZZ ]] to select aweather channel.

e Push [[ CH/WXCH/WX ]] to return to the

condition before selecting theweather channel group.

D U.S.A., International and Canadian channelsq Push [[CH/WXCH/WX ]] (( U/I/C)U/I/C) to select a regular channel.

Push [[CH/WXCH/WX ]] (( U/I/C)U/I/C) again, if a weather channel appears.w While pushing [[H/LH/L ]], push [[CH/WXCH/WX ]] (( U/I/C)U/I/C) to select a

channel group.

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

DW

DW

DW

1616

1616

Push

Push for 1 sec.

Push

Push

while pushingU.S.A. channels

Canadian channelsInternational channels

+

+



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13

I Receiving and transmittingq Push [[PWRPWR ]] to turn power ON.w Push [[VOLVOL ]], then [[ YY ]] / [[ ZZ ]] to adjust audio output level.

Push [[SQLSQL ]], then push [[ YY ]] / [[ ZZ ]] to mute any audio noise, if nec-essary.

e Push [[ YY ]] / [[ ZZ ]] to select the desired channel. When receiving a signal, appears and audio is emittedfrom the speaker.

Further adjustment of the audio level may be necessary at thispoint.

Use the optional Voice scrambler function for privacy. (pgs. 10, 60)r Push [[H/LH/L ]] to select the output power, if necessary.

LOW appears when low power is selected.

Choose low power for short range communications, choose highpower for longer distance communications. Some channels are for selecting low power only.

t Push and hold [[PTTPTT ]] 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 83CANNOT be lawfully used by the general public inU.S.A. waters.

y Release [[PTTPTT ]] to receive.

IMPORTANT: To maximize the readability of your trans-mitted signal (voice), pause a few sec. after pushing[[ PTTPTT ]] , 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 intomicrophone

q Turn power ON

e Set channel

t Push to

transmity Releaseto receive



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I Lock functionsThe Lock function electronically locks keys and switches toprevent accidental changes and function access from the mi-crophone. All keys, switches and controllers on the transceiver are functional.

DActivating the Lock function While pushing [[ H/LH/L ]] , push[[SQLSQL ]] (( L)L) to turn the Lockfunction ON or OFF. appears. Only [[PWRPWR ]], [[PTTPTT ]], [[H/LH/L]],

[[SQLSQL ]] (( L)L), [[VOLVOL]]+[[ YY ]] / [[ ZZ ]]and [[SQLSQL ]]+[[ YY ]] / [[ ZZ ]] are func-tional.

D Activating the All key lock function While pushing [[H/LH/L ]], turn the

power ON by pushing [[PWRPWR ]]to turn the All key lock functionON or OFF. blinks.Only [[ PW RPWR ]] and [[ PT TPTT ]] arefunctional.

I Display backlightingThe function display and keys can be backlit for better visibil-ity under low light conditions. The backlighting condition canalso be adjusted independently from the transceiver.

q Push [[ VOLVOL ]] (( )) for 1 sec.

to enter Backlight adjustingmode. with the number of thebacklight level appears in thechannel comment indicator.

w Push [[ YY ]] / [[ ZZ ]] to adjust thebacklight level. The backlight level is adjustablebetween 0 (light OFF) and 7(brightest).

F or your reference: Pushing [[ YY ]] / [[ ZZ ]], while [H/L][H/L] is pushed, also adjusts back-light level. No backlight level indication is available.

DIM

MONI

MONI

Appears when the lockfunction is in use.

Appears while in theBacklight adjustmentmode.

Blinks when the all lockfunction is in use.



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I Monitor functionThe monitor function releases the noise squelch mute of themicrophone only. (An independent noise squelch system isemployed.)

I RF attenuator function Push [[LO/DXLO/DX ]] to turn the RF

attenuator function ON andOFF.

I Call channel programmingq Push [[ CH/WXCH/WX ]] (( U/I/C)U/I/C) several

times while pushing [[H/LH/L ]] to selectthe desired channel group (USA,INT, CAN) to be programmed.

w Push [[ ]] (( 99 )) for 1 sec. to selectcall channel of the selected chan-nel group.CALL and call channel number ap-pear.

e Push [[ ]] ((99 )) again for 3 sec. (untila long beep changes to 2 shortbeeps) to enter call channel pro-gramming condition.The channel number and channelgroup to be programmed blinks.

r Push [[ YY ]] / [[ ZZ ]] to select the desiredchannel.

t Push [[ ]] (( 99 )) to program the dis-played channel as call channel.The channel number and channelgroup stop ashing.

1616

1616

1616

DW

13

Appears when the RFattenuator function isin use.

Blinks when the Monitorfunction is in use.

Push [[SQLSQL ]] (( L)L) for 1 sec.to activate the Monitor func-

tion. blinks and audio is emit-ted.

Any key cancels the Monitorfunction.

MONI


I O i l V i bl I D l h/T i h


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I Optional Voice scrambleroperation

D Activating the Scramblerq Select an operating channel,

except for Channel 16, Chan-nel 70 or weather channels.

w While pushing [[ H/LH/L ]] , push[[LO/DXLO/DX]] (( SCR)SCR) to turn theVoice scrambler function ON. SCRM appears.

e To turn the Scrambler func-tion OFF, repeat step w .SCRM disappears.

D Programming scramble codesThere are 128 codes available with UT-98 or 32 codes (01to 32) available with the UT-112 for programming. In order tounderstand one another, all transceivers in your group musthave 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.

I Dualwatch/Tri-watchoperation

q Push [[ YY ]] / [[ ZZ ]] to select the desired channel.Push [[CH/WXCH/WX ]] (( U/I/C)U/I/C) several times while pushing [[H/LH/L ]] toselect the channel group (USA, INT, CAN), if desired.

w Push [[CH/WXCH/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 Dualwatchwhen receiving a signal on callchannel.

Dualwatch or Tri-watch can beselected in the transceivers Setmode.

e To cancel

Documents

Icom IC-M502A Instruction Manual