Icom IC-M801GMDSS User manual

MF/HF MARINE TRANSCEIVER
INSTRUCTION MANUAL
iM801GMDSS
Jun. 2007
for Rev. 1.00

i
FOREWORD
Thank you for purchasing this Icom product. The IC-
M801GMDSS MF
/
HF MARINE TRANSCEIVER is designed
and built with Icom’s superior technology and crafts-
manship. 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-M801GMDSS your radio of
choice, and hope you agree with Icom’s philosophy of
“technology first.” Many hours of research and develop-
ment went into the design of your IC-M801GMDSS.
D FEATURES
❍Standard 4 × 8 ″ remote controller
❍
Built-in DSC meets ITU Class A requirement
IMPORTANT
READ THIS INSTRUCTION MANUAL
CAREFULLY before attempting to operate the
transceiver.
SAVE THIS INSTRUCTION MANUAL. This
manual contains important safety and operating in-
structions for the IC-M801GMDSS.
EXPLICIT DEFINITIONS
RWARNING HIGH VOLTAGE! NEVER at-
tach an antenna or internal antenna connector during
transmission. This may result in an electrical shock or
burn.
RWARNING! NEVER connect the transceiver to
an AC outlet directly. This may pose a fire hazard or
result in an electric shock.
RWARNING! NEVER mount the transceiver
main unit overhead. The weight of the unit is approxi-
mately 8.5 kg, but its apparent weight will increase
several fold due to wave shocks or vibration. The unit
must be mounted on a flat hard surface only.
RNEVER connect a power source of more than
31.2 V DC. This connection could cause a fire or ruin
the transceiver.
RNEVER place the transceiver where normal oper-
ation of the ship or vehicle may be hindered or where it
could cause bodily injury.
RNEVER let metal, wire or other objects touch any
internal part or connectors on the rear panel of the
transceiver. This may result in an electric shock.
DO NOT use chemical agents such as benzine or al-
cohol when cleaning, as they can damage the trans-
ceiver surface.
During maritime mobile operation, KEEP the trans-
ceiver and handset or microphone as far away as pos-
sible (at least 1 m) from the magnetic navigation com-
pass to prevent erroneous indications.
Use Icom handset or microphones only (supplied or op-
tional). Other manufacturer’s handset or microphones
have different pin assignments, and connection to the
IC-M801GMDSS may damage the transceiver.
AVOID using or placing the transceiver in areas with
temperatures below –15°C or above +55°C.
AVOID placing the transceiver in excessively dusty en-
vironments or in direct sunlight.
AVOID placing the transceiver against walls or putting
anything on top of the transceiver. This will obstruct
heat dissipation.
Place the unit in a secure place to avoid inadvertent
use by children.
BE CAREFUL! The transceiver main unit will become
hot when operating the transceiver continuously for
long periods.
PRECAUTIONS
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.
Icom, Icom Inc. and the are registered trademarks of
Icom Incorporated (Japan) in the United States, the United
Kingdom, Germany, France, Spain, Russia and/or other
countries.
IBM is a registered trademark of International Business Ma-
chines.

ii
When your ship requires assistance, contact other ships and the Coast Guard by sending a distress call using dig-
ital selective calling on an emergency frequency.
IN CASE OF EMERGENCY
When immediate help is needed
qPush and hold [DISTRESS] for 5 sec. until the
short beeps become one long beep, to send the
distress call.
wAfter the appropriate traffic frequency is automati-
cally selected (after an acknowledgement call is
received), push and hold the PTT switch on the
handset or microphone and send the following in-
formation.
1. “MAY DAY, MAY DAY, MAY DAY.”
2. “THIS IS……………” (name of ship)
3. “LOCATED AT ……” (ship’s position)
4. Give the reason for the distress call.
5. Explain what assistance you need.
6. Give additional information:
• Ship type
• Ship length
• Ship color
• Number of people on-board
When potential problems exist
qPush [DSC] to select DSC watch mode, if neces-
sary.
wPush [MODE SET
] to select DSC menu, rotate [CH]
to select “Geographical” then push [ENT].
eFollow the guidance displayed on the LCD (bottom
line), to set up the category, area, calling and traf-
fic frequencies with [CH], [ENT] and keypad.
rPush and hold [CALL] for 1 sec. until the short
beeps become one long beep.
tTransmit the appropriate information using voice.
• DSC equipped ships may monitor your transmission.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Quick Reference
The main firmware revision number is displayed in the opening screen as below.
The revision number is also displayed when MMSI code check screen is selected. (see page 43)
<MMSI>
123456789
1.00
Main firmware revision
number indication
MAIN FIRMWARE REVISION NUMBER

TABLE OF CONTENTS
FOREWORD...............................................................i
IMPORTANT ............................................................. i
EXPLICIT DEFINITIONS .......................................... i
PRECAUTIONS ........................................................ i
IN CASE OF EMERGENCY .....................................ii
MAIN FIRMWARE REVISION NUMBER .................ii
TABLE OF CONTENTS .......................................... iii
1 OPERATING RULES AND GUIDELINES ........... 1
2 PANEL DESCRIPTION ................................... 2–7
■Controller (RC-25GMDSS) .............................. 2
■Main unit ........................................................... 4
■Handset (HS-98) .............................................. 5
■LCD screen ...................................................... 6
3 SELECTING A CHANNEL/FREQUENCY ...... 8–9
■Selecting a channel .......................................... 8
4 RECEIVE AND TRANSMIT ........................ 10–12
■Basic voice transmit and receive .................. 10
■Function for transmit ...................................... 10
■Functions for receive ...................................... 11
■FSK operation ................................................ 12
5 CHANNEL NAME PROGRAMMING ................ 13
6 FREQUENCY PROGRAMMING ................ 14–15
■Frequency selection ....................................... 14
■Programming a frequency .............................. 15
7 DSC PREPARATION .................................. 16–17
■MMSI code programming ............................... 16
■Position and time programming ..................... 17
8 CALL PROCEDURE ................................... 18–27
■Distress call .................................................... 18
■Individual call ................................................. 20
■Group call ....................................................... 22
■Geographical call ........................................... 24
■Position request call ....................................... 26
■Test call .......................................................... 27
9 WHEN RECEIVING A CALL ...................... 28–39
■To receive a DSC call ..................................... 28
■Received information ..................................... 29
■Deleting a memory ......................................... 30
■Distress call .................................................... 31
■Distress acknowledgement call ...................... 34
■Distress relay call ........................................... 35
■Individual call ................................................. 36
■Group call ....................................................... 38
■Polling call ...................................................... 38
■Position request call ....................................... 39
■Geographical area call ................................... 39
10 MEMORY OPERATION .................................... 40
■Memory description ........................................ 40
■Memory writing ............................................... 40
■Memory reading/transmitting/deleting ............ 40
11 DSC MENU OPERATION ........................... 41–44
■General .......................................................... 41
■ID input ........................................................... 41
■Frequency input ............................................. 42
■Verifying self-ID .............................................. 43
■Self testing ..................................................... 43
■Scanning distress frequency setting .............. 43
■Memory reading/deleting ............................... 44
■Printing out the DSC memory contents .......... 44
12 SET MODE ................................................. 45–49
■Quick set mode .............................................. 45
■Initial set mode ............................................... 46
13 CONNECTION AND INSTALLATION ........ 50–63
■Supplied accessories ..................................... 50
■Basic connections ...........................................51
■Advanced connections ................................... 52
■Ground connection ......................................... 53
■Power source ................................................. 54
■Antenna .......................................................... 55
■Mounting ........................................................ 56
■Using the optional MB-108 ............................. 58
■Using the optional MB-75 ............................... 59
■Transceiver dimensions ................................. 60
■Fuse replacement .......................................... 61
■Connector information .................................... 62
14 SPECIFICATIONS ............................................ 64
15 OPTIONS .......................................................... 65
16 TEMPLATE ................................................. 67–70
■Remote controller (RC-25GMDSS) ................ 67
■Speaker (SP-24E) .......................................... 69
17 ANTENNA AND GROUNDING
CONSIDERATIONS ................................... 71–73
iii

1
1
OPERATING RULES AND GUIDELINES
1
Quick Reference
Before transmitting, monitor the channel you wish to
use so as to avoid interrupting transmissions al-
ready in progress.
• CALL PROCEDURE
Calls must be properly identified and the time limit
must be respected.
qGive your call sign each time you call another ship
or coast guard station. If you have no call sign,
identify the station by giving your ship name and the
name of the licensee.
wGive your call sign at the end of each transmission
that lasts more than 3 min.
eYou must break and give your call sign at least once
every 15 min. during long ship-to-shore calls.
rKeep your unanswered calls short, less than
30 sec. Do not repeat a call for 2 min.
tUnnecessary transmissions are not allowed.
• PRIORITIES
qRead all rules and regulations pertaining to priori-
ties and keep an up-to-date copy handy. Safety and
distress calls take priority over all others.
wFalse or fraudulent distress signals are prohibited
and punishable by law.
• PRIVACY
qInformation overheard but not intended for you, can-
not lawfully be used in any way.
wIndecent or profane language is prohibited.
• LOGS
qAll distress, emergency and safety calls must be
recorded in complete details. Log data activity is
usually recorded in 24 hour time. Universal Time
Coordinated (UTC) is frequently used.
wAdjustments, repairs, channel frequency changes
and authorized modifications affecting electrical op-
eration of the equipment must be kept in the main-
tenance log; entries must be signed by the autho-
rized licensed technician performing or supervising
the work.
• RADIO LICENSES
(1) SHIP STATION LICENSE
You must have a current radio station license before
using the transceiver. It is unlawful to operate a ship
station which is not licensed.
Inquire through your dealer or the appropriate govern-
ment agency for a Ship-Radiotelephone license appli-
cation. This government-issued license states the call
sign which is your craft’s identification for radio pur-
poses.
(2) OPERATOR’S LICENSE
A Restricted Radiotelephone Operator Permit is the li-
cense most often held by small ship 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 operator may operate the transceiver.
However, non-licensed individuals may talk over a
transceiver if a licensed operator starts, supervises,
and ends the call and makes the necessary log en-
tries.
Keep a copy of the current government rules and reg-
ulation handy.

2
2
PANEL DESCRIPTION
■Controller (RC-25GMDSS)
qDISTRESS SWITCH [DISTRESS] (p. 18)
Push and hold for 5 sec. (approx.) to make a dis-
tress call.
wCALL SWITCH [CALL]
Push and hold for 1 sec. to start calling after DSC
contents are setup.
eCANCEL SWITCH [CANCEL]
Cancels a distress or DSC repeat call.
rHEADPHONE JACK [ ]
Accepts headphones.
• Output power: 2.5 mW with a 16 Ωload
(stereo/monaural)
tMICROPHONE CONNECTOR [MIC]
Accepts the supplied or optional microphone.
• See p. 65 for appropriate microphones.
• See p. 62 for microphone connector information.
yGROUP SELECTOR [GRP]
➥
Selects groups in 20 channel steps and ITU ma-
rine channel groups. (p. 8)
➥Selects items during quick/initial set mode, etc.
uCHANNEL SELECTOR [CH]
➥Selects an operating channel within the selected
channel group such as ITU channels. (p. 8)
•User channels can be selected from 1 to 160 (max.)
in sequence regardless of the channel group.
➥Changes setting or value of the selected item
during quick/initial set mode, etc.
iRX/CLARITY SWITCH [RX CLAR ]
➥After pushing [F], turns the clarity function ON
and OFF. (p. 12)
• [CH] is used for clarity control.
➥During DSC watch mode, enters Received Call
Log screen. (p. 29)
• [CH] is used for distress and other call selection.
oPOWER SWITCH [POWER]
➥Push to turn the power ON.
➥Push and hold for 1 sec. to turn the power OFF.
!0 TX/TRANSMIT FREQUENCY SWITCH [TX TXF ]
➥ After pushing [F], displays the transmit fre-
quency, and opens the squelch. Checks and mon-
itors the transmit frequency while holding. (p. 10)
➥During DSC watch mode, enters TX memory se-
lect screen. (p. 40)
• [CH] is used for memory selection.
!1 VOLUME CONTROL [VOL]
Adjusts the audio output level.
• Audio does not come from the speaker when:
- The speaker OFF switch is turned ON.
- The squelch function is turned ON and no signal is
being received.
-Pick the handset up with speaker switch “ ” position.
(p. 5)
- During DSC watch mode.
DISTRESS
q
w
e
r
t
yuio!0 !1
!2
!3
!4!5!6!7Function display (pgs. 6, 7)

3
2
PANEL DESCRIPTION
2
!2 FREQUENCY/CHANNEL SWITCH [FREQ/CH]
➥Selects indication type: (p. 8)
When channel comment indication is ON;
switches channel comment indication ON and
OFF.
When channel comment indication is OFF;
switches transmit frequency indication ON and
OFF.
➥After pushing [F], enters channel name pro-
gramming mode, when channel comment indica-
tion is ON. (p. 13)
!3 KEYPAD
➥Inputs numeral “1” for channel number
input, etc.
➥Inputs “1,” “Q,” “Z,” “q,” “z” or space for
channel comment input.
➥After pushing [F], turns the noise
blanker function ON and OFF. (p. 11)
➥Inputs numeral “2” for channel number
input, etc.
➥Inputs “2,” “A,” “B,” “C,” “a,” “b” or “c” for
channel comment input.
➥After pushing [F], turns the squelch
function ON and OFF. (p. 11)
➥Inputs numeral “3” for channel number
input, etc.
➥Inputs “3,” “D,” “E,” “F,” “d,” “e” or “f” for
channel comment input.
➥After pushing [F], starts and stops the
scan function. (p. 9)
➥Inputs numeral “4” for channel number
input, etc.
➥Inputs “4,” “G,” “H,” “I,” “g,” “h” or “i” for
channel comment input.
➥After pushing [F], turns the external
speaker output ON and OFF. (p. 10)
➥Inputs numeral “5” for channel number
input, etc.
➥Inputs “5,” “J,” “K,” “L,” “j,” “k” or “l” for
channel comment input.
➥After pushing [F], turns the AGC OFF
function ON and OFF. (p. 11)
➥Inputs numeral “6” for channel number
input, etc.
➥Inputs “6,” “M,” “N,” “O,” “m,” “n” or “o” for
channel comment input.
➥After pushing [F], enters the RF gain ad-
justment mode. (p. 11)
➥Inputs numeral “7” for channel number
input, etc.
➥Inputs “7,” “P,” “R,” “S,” “p,” “r” or “s” for
channel comment input.
➥Inputs numeral “8” for channel number
input, etc.
➥Inputs “8,” “T,” “U,” “V,” “t,” “u” or “v” for
channel comment input.
➥After pushing [F], push for 1 sec. to print
out the DSC contents, etc. (p. 44)
➥Inputs numeral “9” for channel number
input, etc.
➥Inputs “9,” “W,” “X,” “Y,” “w,” “x” or “y” for
channel comment input.
➥Inputs numeral “0” for channel number
input, etc.
➥Inputs “0” and symbols (.,()*+-
/<=>@) for channel comment input.
➥After pushing [F], selects LCD backlight
brightness.
➥Fixes input of channel number and chan-
nel comment, etc.
➥When pushed for 1 sec., stores pro-
grammed frequency, operating mode and
memory comment into a channel.
➥Clears entered digits and retrieves the
previous frequency, channel or channel
names during setting.
!4 FUNCTION SWITCH [F]
After pushing, activates the secondary functions.
•“ ” appears when a secondary function can be ac-
cessed.
!5 TUNE/THROUGH SWITCH [TUNE THRU ]
➥Starts tuning the connected AT-141 HF AUTOMATIC
ANTENNA TUNER
.
•“TUNE” appears when tuned.
•When the tuner cannot tune the antenna, the tuning
circuit is bypassed automatically after 15 sec.
➥After pushing [F], bypasses the connected an-
tenna tuner. (p. 12)
•“TH U” appears instead of “TUNE” indication.
!6 MODE/SET SWITCH [MODE SET ]
➥Push to select an operating mode.
•J3E (USB), H3E (AM), LSB, J2B (AFSK), F1B (FSK),
and A1A (CW) modes are available, depending on
version or countries.
➥After pushing [F], enters quick set mode. (p. 45)
➥During DSC watch mode, enters DSC menu.
!7 DSC SWITCH [DSC]
Switches DSC watch mode and voice communica-
tion mode when pushed.

■Main unit
q GROUND TERMINAL
IMPORTANT! Connects a ship’s ground. See
page 53 for details.
wDC POWER TERMINALS (pgs. 51, 54)
Accepts 24 V DC through the supplied DC power
cables.
Red terminal is for positive and black terminal is for
negative connection.
eDC ISOLATE SWITCH [DC ISOLATE] (p. 51)
Turns the transceiver’s main power ON and OFF.
rTUNER CONTROL SOCKET (pgs. 51, 55)
Connects a control cable to the antenna tuner, AT-
141.
A female connector kit is supplied for antenna tuner
connection.
tANTENNA CONNECTOR 1 (pgs. 51, 55)
Connects a 50 ΩHF band antenna via a 50 Ω
matched coaxial cable with a PL-259 plug for both
transmit and receive operation.
yPRINTER CONNECTOR (pgs. 52, 63)
Connects an IBM®centronics or compatible printer
to print out received DSC information automatically
or manually.
uREMOTE CONNECTOR [REMOTE] (p. 63)
Connects a cable (D-sub 9-pin) for remote control
in the IEC61162-1 format.
iMODEM CONNECTOR [AF/MOD] (pgs. 52, 62)
Connects to an NBDP (Narrow Band Direct Print-
ing) or FAX system via a D-sub 15-pin cable.
This connector can also be used as SSB telephony
interface (600 Ω).
oCONTROLLER CONNECTOR [CONTROLLER]
(p. 51)
Connects the supplied remote controller, RC-
25GMDSS.
!0 GPS CONNECTOR [GPS] (p. 52)
Input position and UTC data (IEC6112-1 format),
such as from a GPS receiver, etc., for setting your
positioning and time data automatically without
manual input for DSC operation.
!1 SPEAKER JACK [SP] (p. 51)
Connects the supplied external speaker, SP-24E.
!2 ANTENNA CONNECTOR 2 (p. 51)
Connects a 50 ΩHF band antenna via a 50 Ω
matched coaxial cable with a PL-259 plug for DSC
receiver.
IMPORTANT!: An HF antenna should be con-
nected to this antenna connector,
otherwise no DSC call can be re-
ceived.
GPS IN (+)
RCA
GPS IN (–)
4
2PANEL DESCRIPTION
qwe
rtyuio
!0!1
!2
✔For detailed “ANTENNA AND GROUNDING CON-
SIDERATIONS,” see pages 71 to 73.

5
2
PANEL DESCRIPTION
2
■Handset (HS-98)
qSPEAKER SWITCH
Toggle the connected external speaker output ON
and OFF when pick the handset up.
• When the switch is set to “ ” position
- Emits the receiving audio from the connected ex-
ternal speaker.
• When the switch is set to “ ” position
- Mutes the connected external speaker output.
•The receiving audio can be heard from the earpiece
of the handset.
- Replace the handset into the cradle to emits the
receiving audio from the connected external
speaker.
wHANDSET CONNECTOR
Connects to [MIC] connector on the remote con-
troller. (p. 51)
ePTT SWITCH [PTT]
Push and hold to transmit; release to receive.
Handset
q
Cradle
w
e

6
2PANEL DESCRIPTION
■LCD screen
The IC-M801GMDSS has 2 indication types, one is
channel name indication and the other is frequency in-
dication. These indication types can be switched with a
push of a button, depending on set mode’s setting.
See pages 8 and 47 for display type settings.
NB SQL
01234A
CH
CLA
0
SP
AGC
---GPS---
Lat
45 59'N
Lon134
44'E
16:23
X
TX
TX
TUNE J3E SIMP
Exit
SP
34 34.000N
134
34.000E
12:34
X
12.345.5
2
4 6 8 12 16
F1B
GPS
Unread MSG
NB SQL
CH
CLA 0
SP
AGC
UTC
16:23
X TUNE J3E SIMP
ACK
MMSI
123456789
• Channel name indication
• Frequency indication
• DSC watch mode indication
q
we rt
y
u
i
o
!0
!1
!2
!3
!4
!5
q
we rt
y
u
i
o
!0
!1
!2
!3
!4
!5
q
e
@1
t
u
o
!7
@2
!8
!9
!5
!6
@0

7
2
PANEL DESCRIPTION
2
qRECEIVE INDICATOR
“X” appears when signals are received or the
squelch is open.
wTUNE INDICATOR
“TUNE” blinks while tuning. (p. 10)
•“TUNE” appears after tuning is completed with AT-141.
•“TH U” appears when the tuner through function is ac-
tivated.
•“SW ” appears when the antenna SWR worsens during
transmit, depending on the transmit output power. If it
appears, check your antenna system.
e OPERATING MODE INDICATOR
Shows the selected operating mode.
•“J3E,” “USB,” “H3E,” “AM,” “LSB,” “J2B,” “AFS,”
“F1B,” “FSK,” “A1A” or “CW” appears depending on
operating mode and setting.
rSIMPLEX/DUPLEX INDICATOR
“SIMP” appears when a simplex channel is se-
lected.
“DUP” appears when a duplex channel is selected.
tFUNCTION INDICATOR
“ ” appears when a secondary function can be ac-
cessed.
yCLARITY INDICATOR (p. 12)
“CLA ” appears when the clarity function is acti-
vated and shows shifting frequency in “Hz.”
uSPEAKER OFF INDICATOR (p. 10)
“ ” appears when the speaker output is turned
OFF.
iAGC OFF INDICATOR (p. 11)
“ ” appears when the AGC OFF function is
turned ON.
oPOSITION/UTC TIME INDICATOR (p. 17)
Shows position and/or UTC (or local) time. When
an IEC61162-1 data is applied to [GPS], the indica-
tion is up dated automatically.
•When no IEC61162-1 data is applied, the position and
UTC time must be set in advance.
•“GPS” appears when an IEC61162-1 data is applied to
[GPS], “MNL” appears when the position is manually
set.
•“UTC” appears when the offset time has not been pro-
grammed. (No “UTC” indication when offset time is pro-
grammed and shows local time.)
!0 CHANNEL NUMBER INDICATION
Shows the selected channel number.
!1 S/ANTENNA CURRENT INDICATOR
Shows relative driving antenna current levels dur-
ing transmit and receiving signal strength during re-
ceive.
!2 NOISE BLANKER INDICATOR (p. 11)
“NB” appears when the noise blanker function is ac-
tivated.
!3 SQUELCH INDICATOR (p. 11)
“SQL” appears when the squelch is ON.
!4 TRANSMIT INDICATOR
➥“TX” appears during transmit.
➥“TX” blinks while monitoring a transmit frequency.
(p. 10)
!5 CHANNEL NAME/RECEIVE FREQUENCY
READOUT
➥Shows the programmed channel names.
➥Shows receive frequency when no channel name
is programmed, or during frequency indication.
➥ During DSC watch mode, displays “DSC WATCH.”
!6 TRANSMIT FREQUENCY READOUT
Shows transmit frequency.
!7 OPERATING GUIDE INDICATION
During DSC watch mode operation, shows several
types of guidance, according to the selected condi-
tion.
!8 SCANNING FREQUENCY READOUT
During DSC watch mode operation, shows the pro-
grammed scan frequency.
• Decimal points blink.
!9 MMSI CODE INDICATION
During DSC watch mode operation, shows the pro-
grammed MMSI code.
@0 AUTO ACKNOWLEDGEMENT INDICATOR
Appears when the automatic acknowledgement
function is set to ON. (p. 48)
@1 UNREAD MESSAGE INDICATOR
Appears when an unread DSC message is avail-
able.
@2 SCANNING DISTRESS FREQUENCY INDICATOR
Shows the scanning distress frequency initials for
DSC operation. (p. 43)
AGC
SP

3
8
SELECTING A CHANNEL/FREQUENCY
CHANNEL GROUPS *1[GRP] changes in 20 channels steps. *2SITOR use— no group separation.
■Selecting a channel
The transceiver has 160 user channels and ITU chan-
nels. However, the number of user channels can be
optionally restricted.
DDDisplay selection
NOTE: Channel name (alphanumeric) may not ap-
pear during frequency indication depending on ini-
tial set mode setting. (p. 47)
FREQUENCY indication CHANNEL indication
16:23
X J3E SIMP
CH
CH
---GPS---
Lat
45 59'N
Lon134
44'E
16:23
X J3E SIMP
0 1 2 3 4A
DDUsing the channel selector
The transceiver has two large controls for group se-
lection and channel selection. The [GRP] changes
channels in 20 channel increments and selects ITU
channel groups; and the [CH] selects each channel.
qRotate [GRP] to select the desired channel group
as shown at right and/or below.
wRotate [CH] to select the desired channel.
[EXAMPLE]: Selection with the [GRP]
ITU SSB channels
CH
---GPS---
Lat
45 59'N
Lon134
44'E
16:23
X J3E SIMP
CH
---GPS---
Lat
45 59'N
Lon134
44'E
16:23
X J3E SIMP
CH
---GPS---
Lat
45 59'N
Lon134
44'E
16:23
X J3E SIMP
CH
---GPS---
Lat
45 59'N
Lon134
44'E
16:23
X J3E SIMP
CH
---GPS---
Lat
45 59'N
Lon134
44'E
16:23
X J3E SIMP
CH
---GPS---
Lat
45 59'N
Lon134
44'E
16:23
X J3E DUP
CH
---GPS---
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Lon134
44'E
16:23
X J3E SIMP
CH
---GPS---
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Lon134
44'E
16:23
X J3E DUP
CH
---GPS---
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X J3E SIMP
å
0 1 2 3 4A
0
1 2 3 4A
0
1 2 3 4A
0
1 2 3 4A
0
1 2 3 4A
0
1 2 3 4A
0
1 2 3 4A
0
1 2 3 4A
0
1 2 3 4A
[CH][GRP]
Channel No. Description Channel No. Description Channel No. Description
1 to 160 User Ch.*11201 to 1241 12 MHz ITU duplex Ch. 22-1 to 22-9 22 MHz ITU simplex Ch.
401 to 427 4 MHz ITU duplex Ch. 12-1 to 12-9 12 MHz ITU simplex Ch. 2501 to 2510 25 MHz ITU duplex Ch.
4-1 to 4-9 4 MHz ITU simplex Ch. 1601 to 1656 16 MHz ITU duplex Ch. 25-1 to 25-9 25 MHz ITU simplex Ch.
601 to 608 6 MHz ITU duplex Ch. 16-1 to 16-9 16 MHz ITU simplex Ch. C1-1 to C1-21 C1 channels
6-1 to 6-9 6 MHz ITU simplex Ch. 1801 to 1815 18 MHz ITU duplex Ch. C2-1 to C2-31 C2 channels
801 to 832 8 MHz ITU duplex Ch. 18-1 to 18-9 18 MHz ITU simplex Ch. 4001 to 25040 ITU FSK duplex Ch.*2
8-1 to 8-9 8 MHz ITU simplex Ch. 2201 to 2253 22 MHz ITU duplex Ch.

3
3
9
SELECTING A CHANNEL/FREQUENCY
DDUsing the keypad
Direct channel selection via the keypad is available
for quick channel selection.
qEnter the desired channel number via the keypad.
•Pushing [CE] clears input digits and retrieves the chan-
nel.
•A user channel is selected when channel 1–160 is
input (max. number may be optionally restricted).
•An ITU SSB channel is selected when channel num-
bers higher than 401 are input.
•When selecting an ITU simplex channel, push [0
DIM ]
three times to input “– (dash).”
(e.g. When selecting the channel 4-1;
—push [4
SP
××], [0
DIM ], [0 DIM ], [0 DIM ] then [1 NB ].)
wPush [ENT] to select the channel.
[EXAMPLE]: Selecting channel 158
LH
CH
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CH
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X J3E
LH
CH
---GPS---
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16:23
X J3E
LH
CH
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X J3E SIMP
DDUsing scan function
The transceiver has automatic channel or frequency
change capability (scan function). There are 3 types
of scan functions available to suit your needs.
Channel scan and channel resume scan increase
channels within a 20 channel range, such as Ch 1 to
Ch 20, Ch 141 to Ch 160, etc., in user channels; or
all channels in the group of ITU channels.
Programmed scan scans frequencies within the fre-
quency range between user channels 159 and 160.
Scan type selection is available in initial set mode.
See p. 46 for the selection.
SCAN OPERATION
qRotate [GRP] and [CH], or use the keypad to se-
lect your desired channel group.
•This operation is not necessary for programmed scan.
wPush [F] then [2 SQL ] to turn OFF the squelch
function, if programmed scan is selected.
ePush [F] then [3 SCAN ] to start the scan.
rTo stop the scan, repeat step eagain.
•[CH] rotation or pushing some other switches also
stops the scan.
Channel scan/Channel resume scan
Ch 1
Ch 2 Ch 3
Ch 4
Ch 20
When resume OFF;
scan does not pause even
if a signal is received.
When resume ON;
scan pauses for 10 sec.,
then resumes, or resumes
after 2 sec. from when the
signal disappears.
Programmed scan
Ch 159 Ch 160
Scans the frequency range
between the programmed
frequencies on channels
159 and 160.
Scans fast when squelch is
closed and slowly when
squelch is open.

4
10
RECEIVE AND TRANSMIT
■Basic voice transmit and receive
qCheck the following in advance.
➥Handset or microphone is connected.
➥No “SQL”indication.
•If “SQL”appears, push [F] then [2 SQL ] to turn the
squelch OFF.
➥No “”indication.
•If “”appears, push [F] then [4 SP
××] to activate
the speaker.
➥The clarity function is not activated.
•If the clarity function is activated, push [F] then
[RX
CLAR ] to turn the function OFF.
wRotate [GRP] and [CH] to select the desired chan-
nel to be received.
•When receiving a signal, the S-meter shows the signal
strength.
eAdjust [VOL] to the desired audio level when re-
ceiving a signal.
rPush [MODE SET ] to select the desired operating
mode.
tPush [TUNE THRU ] to tune the antenna tuner, if con-
nected.
•Skip this operation when the “AUTO TUNE”is set to ON
in initial set mode (p. 46).
yTo transmit on the channel, push and hold the PTT
switch on the handset or microphone.
•“TUNE”blinks for 1 to 2 sec. for the first transmission
on a channel when the automatic tuning function is acti-
vated.
uSpeak into the handset or microphone at your nor-
mal voice level.
•The RF meter shows the output power according to your
voice level.
•If “SW ”appears, check your antenna system.
iRelease the PTT switch to return to receive.
[RX CLAR]Microphone
connector
[4 SP×] [2 SQL]
[F]
SP
SP
■Function for transmit
DDTransmit frequency check
When “DUP”appears in the display such as for a
ship-to-ship channel, the transmit frequency differs
from the receive frequency.
In such cases, the transmit frequency should be mon-
itored before transmitting to prevent interference to
other stations.
➥Push [F] then push and hold [TX TXF ] to monitor
the transmit frequency. •“TX”blinks and the display shows the transmit frequency.
[TX TXF][F]

11
4
RECEIVE AND TRANSMIT
4
■Functions for receive
DDSquelch function
The squelch function detects signals with voice com-
ponents and squelches (mutes) unwanted signals
such as unmodulated beat signals. This provides
quiet stand-by.
When you need to receive weak signals, the squelch
should be turned OFF.
➥Push [F] then [2 SQL ] to switch the function ON
and OFF.
•See page 45 for the squelch level adjustment. •“SQL”appears when the squelch function is turned ON.
[2 SQL][F]
DDNoise blanker
The noise blanker function reduces pulse type noise
such as that coming from engine ignitions, etc.
The noise blanker may distort reception of strong sig-
nals. In such cases, the noise blanker should be
turned OFF.
➥Push [F] then [1 NB ] to switch the function ON and
OFF.
•See page 45 for the noise blanker level adjustment. •“NB”appears when the NB function is turned ON.
[1 NB][F]
DDAGC OFF function
The receive gain is automatically adjusted according
to received signal strength with the AGC (Automatic
Gain Control) function to prevent distortion from
strong signals and to obtain a constant output level.
When receiving weak signals with adjacent strong
signals or noise, the AGC function may reduce the
sensitivity. In this situation, the AGC function should
be deactivated.
➥Push [F] then [5 AGC
××] to switch the function ON
and OFF.
•“ ” appears when the AGC function is turned OFF.
AGC
[5 AGC×][F]
DDRF gain setting
The receiver gain can be reduced with the RF gain
setting. This may help to remove undesired weak sig-
nals while monitoring strong signals.
Usually, the AGC function reduces the RF gain ac-
cording to the receive signal strength and these weak
signals are removed. However, during no signal re-
ception, these weak signals may not be heard.
In such cases, the RF gain may be useful for setting a
minimum level at which to hear signals.
qPush [F] then [6 RF - G ] to select the RF gain set
mode, as shown below.
wRotate [CH] to set the desired minimum cutting
level.
•
“0 (low sensitivity)”to “9 (max. sensitivity)”are available.
•S-meter shows the minimum permitted level.
ePush any key to exit the RF gain set mode.

■Functions for receive (continued)
DDClarity control
Voice signals received from other stations may be diffi-
cult to receive. This may sometimes happen if a sta-
tion is transmitting slightly off frequency. In such cases,
you can compensate by using the clarity control.
qPush [F] then [RX CLAR ] to switch the function ON
and OFF.
•“CLA ”and shifting value with direction appear.
wRotate [CH] to improve the audio readability.
•Adjustable between ±150 Hz in 10 Hz steps.
[RX CLAR][CH] [F]
12
4RECEIVE AND TRANSMIT
■FSK operation
The transceiver has AFSK operation capability when
an AFSK terminal unit is connected—use J2B for
AFSK operation.
qConnect an AFSK terminal unit to the [AF/MOD]
socket as shown at right.
wSelect the desired channel to operate AFSK mode.
ePush [MODE
SET ] several times to select J2B.
rOperate the AFSK terminal unit.
NOTE:
Some transceivers may operate 1.7 kHz higher
than the IC-M801GMDSS’s J2B mode even when
the same displayed frequencies are in use.
AFSK terminal unit connection
1
5
1115
To pins 1, 2
To pin 9
To pin 5
MOD output
MOD ground
AF input
AFSK terminal unit
AF ground
Tx/Rx control
Ground
To pins 3, 4
DDTuner through function
In the combination with IC-M801GMDSS and optional
AT-141, the tuner through function can be used.
By bypassing the tuner unit, the receiver gain in par-
ticular frequency band may be improved depending
on your antenna element length.
➥While “TUNE”is displayed, push [F] then
[TUNE THRU
] to tuner through function ON.
•“TH U”appears instead of “TUNE”indicator.
•Push [TUNE
THRU ] to turn the function OFF.
[TUNE THRU] [F]

5
13
CHANNEL NAME PROGRAMMING
4
5
DProgramming
qSelect the desired channel to be programmed.
wPush [FREQ/CH] to select channel indication
mode, if desired.
ePush [F] then [FREQ/CH].
•The 1st character for the channel names blinks.
rRotate [CH] selector to select the character for
channel names.
•See the table below for available characters.
tPush the keypad several times to enter that char-
acter.
yRepeat steps rand tto enter the channel name.
uPush [ENT] for 1 sec. to program the channel
name.
CH
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0 1 2 3 4A
CH
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0 1 2 3 4A
CH
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0 1 2 3 4A
Up to 8-character channel names can be assigned for
each user and ITU channel. This may be helpful for in-
dicating the frequency usage, ship name, etc.
NOTE: The display type must be set to “CH-
NAME”to display/program the channel names in ini-
tial set mode. (p. 47).
•Available characters
(space)
KEY CHARACTERS KEY CHARACTERS

6
14
FREQUENCY PROGRAMMING
■Frequency selection
DDUsing the channel selector
qSelect a channel which is programmed near the
frequency you want to receive.
wPush [RX CLAR ] to select the frequency selection
mode.
•“≈”appears in the display.
eRotate [GRP] to select the digit for tuning.
•Under-bar shows the selected digit.
rRotate [CH] to tune the frequency.
•Pushing [Y]/[Z] on the microphone also tunes the fre-
quency.
tRepeat steps eand rto complete the frequency
selection.
yTo return to the previous frequency, push
[RX CLAR ].
•“≈”disappears.
01234A
CH
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Ç
The under-bar is moved by rotating
[GRP].
01234A
CH
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Ç
“Ç” and frequency show that the
frequency can be changed.
DDUsing the keypad
CAUTION: A frequency can be programmed into a
user or e-mail channel by pushing and holding
[ENT] for 1 sec. after entering a frequency. An ITU
simplex frequency can only be programmed on a
temporary basis. Keypad entry should be used only
on spare (or blank) channels.
qRotate [GRP] and [CH], or enter a 1 to 4 digit num-
ber via the keypad, then push [ENT] to select the
memory channel to be used for general coverage
use.
When a blank channel is selected, operating frequency,
mode and channel name do not appear.
wPush [RX CLAR ] to select the frequency selection
mode.
•“≈”appears in the display.
eEnter 4 to 6 digits of the desired frequency via the
keypad.
rPush [ENT] momentarily to input the frequency.
• DO NOT hold [ENT] for more than 1 sec., otherwise the
frequency will be programmed into the channel.
[EXAMPLE]: Setting 12.3450 MHz
•The set frequency can be cleared when [RX
CLAR ] is
pushed while setting.
Ç
Ç
Ç
Ç
01234A
CH
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Ç
Select blank channel.
Push [RX CLAR]
[1 NB]
[2 SQL], [3 SCAN],
[4 SP×], [5 AGC×]
[0 DIM]
[ENT]
01234A
CH
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15
6
FREQUENCY PROGRAMMING
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Quick Reference
■Programming a frequency
DDReceive frequency
qSelect the desired channel to be programmed.
•Channel 1 to 160 (maximum) are programmable.
wPush [RX CLAR ] to select the frequency selection
mode.
eEnter 4 to 6 digits of the desired frequency via the
keypad.
•Or rotate [GRP] and [CH] to change the frequency.
•Pushing [Y]/[Z] on the microphone also tunes the fre-
quency.
rPush [MODE SET ] several times to select the de-
sired operating mode (type of emission).
tPush [ENT] for 1 sec. to program the user chan-
nel.
•3 beeps sound and “≈”disappears.
01234A
CH
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“Ç”indicator disappears when programming is completed.
01234A
CH
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X J3E SIMP
Ç
01234A
CH
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Ç
“Ç”indicator appears.
DDTransmit frequency
qSelect the desired channel to be programmed.
wPush [TX TXF ].
eEnter the desired 5 or 6 digit frequency via the key-
pad.
•[GRP] and [CH], as well as [Y]/[Z] on the microphone
cannot be used.
rPush and hold [ENT] for 1 sec. to program the user
channel.
•3 beeps sound.
01234A
CH
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“ TX ”indicator disappears.
01234A
CH
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X
TX
J3E SIMP
01234A
CH
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TX
“ TX ”indicator blinks.

7
16
DSC PREPARATION
■MMSI code programming
The 9-digit MMSI (Maritime Mobile Service Identity:
DSC self ID) code can be programmed.
This operation is not available when the MMSI code
has been programmed by your dealer. The code re-
programming cannot be performed. This code is dis-
played during DSC watch mode.
DDProgramming
qThe following screen will be displayed briefly at
power ON when no MMSI code is programmed.
wPush [DSC] to select MMSI code programming
condition.
eEnter the specified 9-digit MMSI code via the key-
pad.
•Make sure the correct code is entered.
•Rotate [CH] to move the cursor.
rPush [ENT] to program the code.
•After pushing [ENT], DSC menu is displayed as below.
tPush [MODE SET ] to exit the DSC menu.
******** Set up ********
--------
Select --------
Group
ID
Call
frequency
Traffic
frequency
Scan
frqeuency
Watch
keeping receiver
MMSI
check
Ç
OKSEL
******** Set up ********
---------
MMSI ---------
ID:123456789
OK
******** Set up ********
---------
MMSI ---------
ID:
† ________
OK
<MMSI>
No
MMSI !
1.00
[MODE SET][ENT]
[DSC]