Icom IC-M801GMDSS User Manual

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MF/HF MARINE TRANSCEIVER

INSTRUCTION MANUAL

iM801GMDSS

Jun. 2007

for Rev. 1.00

FOREWORD

Thank you for purchasing this Icom product. The ICM801GMDSS

HF MARINE TRANSCEIVER

is designed and built with Icom’s superior technology and craftsmanship. With proper care, this product should provide you with years of trouble-free operation.

We want to take a couple of moments of your time to thank you for making the IC-M801GMDSS your radio of choice, and hope you agree with Icom’s philosophy of “technology ﬁrst.” Many hours of research and development went into the design of your IC-M801GMDSS.

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 instructions for the IC-M801GMDSS.

EXPLICIT DEFINITIONS

R WARNING HIGH VOLTAGE! NEVER at-

tach an antenna or internal antenna connector during transmission. This may result in an electrical shock or burn.

R WARNING! NEVER connect the transceiver to

an AC outlet directly. This may pose a fire hazard or result in an electric shock.

R WARNING! NEVER mount the transceiver

main unit overhead. The weight of the unit is approximately 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.

R NEVER connect a power source of more than

31.2 V DC. This connection could cause a ﬁre or ruin the transceiver.

R NEVER place the transceiver where normal oper-

ation of the ship or vehicle may be hindered or where it could cause bodily injury.

R NEVER 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 alcohol when cleaning, as they can damage the transceiver surface.

During maritime mobile operation, KEEP the transceiver and handset or microphone as far away as possible

(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 environments 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

WARNING

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 Machines.

When your ship requires assistance, contact other ships and the Coast Guard by sending a distress call using digital selective calling on an emergency frequency.

IN CASE OF EMERGENCY

When immediate help is needed

q Push and hold [DISTRESS] for 5 sec. until the

short beeps become one long beep, to send the distress call.

w After 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 information.

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

q Push [DSC] to select DSC watch mode, if neces-

sary.

w Push [MODE

SET

] to select DSC menu, rotate [CH]

to select “Geographical” then push [ENT].

e Follow the guidance displayed on the LCD (bottom

line), to set up the category, area, calling and trafﬁc frequencies with [CH], [ENT] and keypad.

r Push and hold [CALL] for 1 sec. until the short

beeps become one long beep.

t Transmit the appropriate information using voice.

• DSC equipped ships may monitor your transmission.

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

OPERATING RULES AND GUIDELINES

Quick Reference

Before transmitting, monitor the channel you wish to use so as to avoid interrupting transmissions already in progress.

• CALL PROCEDURE

Calls must be properly identified and the time limit must be respected.

q Give 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.

w Give your call sign at the end of each transmission

that lasts more than 3 min.

e You must break and give your call sign at least once

every 15 min. during long ship-to-shore calls.

r Keep your unanswered calls short, less than

30 sec. Do not repeat a call for 2 min.

t Unnecessary transmissions are not allowed.

• PRIORITIES

q Read 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.

w False or fraudulent distress signals are prohibited

and punishable by law.

• PRIVACY

q Information overheard but not intended for you, can-

not lawfully be used in any way.

w Indecent or profane language is prohibited.

• LOGS

q All 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.

w Adjustments, repairs, channel frequency changes

and authorized modiﬁcations affecting electrical operation of the equipment must be kept in the maintenance log; entries must be signed by the authorized 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 government agency for a Ship-Radiotelephone license application. This government-issued license states the call sign which is your craft’s identification for radio purposes.

(2) OPERATOR’S LICENSE A Restricted Radiotelephone Operator Permit is the license most often held by small 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 entries.

Keep a copy of the current government rules and regulation handy.

PANEL DESCRIPTION

■ Controller (RC-25GMDSS)

q DISTRESS SWITCH [DISTRESS] (p. 18)

Push and hold for 5 sec. (approx.) to make a distress call.

w CALL SWITCH [CALL]

Push and hold for 1 sec. to start calling after DSC contents are setup.

e CANCEL SWITCH [CANCEL]

Cancels a distress or DSC repeat call.

r HEADPHONE JACK [ ]

Accepts headphones.

• Output power: 2.5 mW with a 16 Ω load (stereo/monaural)

t MICROPHONE CONNECTOR [MIC]

Accepts the supplied or optional microphone.

• See p. 65 for appropriate microphones.

• See p. 62 for microphone connector information.

y GROUP SELECTOR [GRP]

➥

Selects groups in 20 channel steps and ITU marine channel groups.

(p. 8)

➥ Selects items during quick/initial set mode, etc.

u CHANNEL 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.

i RX/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.

o POWER 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 frequency, and opens the squelch. Checks and monitors 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

yuio!0 !1

!4!5!6!7Function display (pgs. 6, 7)

PANEL DESCRIPTION

!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 indication 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 accessed.

!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)

•“THRU” 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 communication mode when pushed.

■ Main unit

GROUND TERMINAL

IMPORTANT! Connects a ship’s ground. See page 53 for details.

w DC 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.

e DC ISOLATE SWITCH [DC ISOLATE] (p. 51)

Turns the transceiver’s main power ON and OFF.

r TUNER 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.

t ANTENNA CONNECTOR 1 (pgs. 51, 55)

Connects a 50 Ω HF band antenna via a 50 Ω matched coaxial cable with a PL-259 plug for both transmit and receive operation.

y PRINTER CONNECTOR (pgs. 52, 63)

Connects an IBM®centronics or compatible printer to print out received DSC information automatically or manually.

u REMOTE CONNECTOR [REMOTE] (p. 63)

Connects a cable (D-sub 9-pin) for remote control in the IEC61162-1 format.

i MODEM CONNECTOR [AF/MOD] (pgs. 52, 62)

Connects to an NBDP (Narrow Band Direct Printing) or FAX system via a D-sub 15-pin cable. This connector can also be used as SSB telephony interface (600 Ω).

o CONTROLLER CONNECTOR [CONTROLLER]

(p. 51) Connects the supplied remote controller, RC25GMDSS.

!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 Ω HF 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 received.

GPS IN (+)

RCA

GPS IN (–)

PANEL DESCRIPTION

qwe

rtyuio

!0!1

✔ For detailed “ANTENNA AND GROUNDING CON-

SIDERATIONS,” see pages 71 to 73.

PANEL DESCRIPTION

■ Handset (HS-98)

q SPEAKER 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 external 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.

w HANDSET CONNECTOR

Connects to [MIC] connector on the remote controller. (p. 51)

e PTT SWITCH [PTT]

Push and hold to transmit; release to receive.

Handset

Cradle

PANEL DESCRIPTION

■ LCD screen

The IC-M801GMDSS has 2 indication types, one is channel name indication and the other is frequency indication. 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

0123

CLAR

0 SP AGC

---GPS---

Lat

45 59'N

Lon134

44'E

16:23

TUNE J3E

SIMP

Exit

34 34.000N

134

34.000E 12:34

12.345.5

4 6 8

12 16

F1B

GPS

Unread MSG

NB SQL

CLAR

SP AGC

UTC

16:23

RX TUNE J3E

SIMP

ACK

MMSI

123456789

• Channel name indication

• Frequency indication

• DSC watch mode indication

we rt

u i

we rt

u i

PANEL DESCRIPTION

q RECEIVE INDICATOR

“RX” appears when signals are received or the squelch is open.

w TUNE INDICATOR

“TUNE” blinks while tuning. (p. 10)

•“TUNE” appears after tuning is completed with AT-141.

•“THRU” appears when the tuner through function is ac-

tivated.

•“SWR” appears when the antenna SWR worsens during

transmit, depending on the transmit output power. If it appears, check your antenna system.

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.

r SIMPLEX/DUPLEX INDICATOR

“SIMP” appears when a simplex channel is selected. “DUP” appears when a duplex channel is selected.

t FUNCTION INDICATOR

“ ” appears when a secondary function can be accessed.

y CLARITY INDICATOR (p. 12)

“CLAR” appears when the clarity function is activated and shows shifting frequency in “Hz.”

u SPEAKER OFF INDICATOR (p. 10)

“ ” appears when the speaker output is turned OFF.

i AGC OFF INDICATOR (p. 11)

“ ” appears when the AGC OFF function is turned ON.

o POSITION/UTC TIME INDICATOR (p. 17)

Shows position and/or UTC (or local) time. When an IEC61162-1 data is applied to [GPS], the indication 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 programmed and shows local time.)

!0 CHANNEL NUMBER INDICATION

Shows the selected channel number.

!1 S/ANTENNA CURRENT INDICATOR

Shows relative driving antenna current levels during transmit and receiving signal strength during receive.

!2 NOISE BLANKER INDICATOR (p. 11)

“NB” appears when the noise blanker function is activated.

!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 condition.

!8 SCANNING FREQUENCY READOUT

During DSC watch mode operation, shows the programmed scan frequency.

• Decimal points blink.

!9 MMSI CODE INDICATION

During DSC watch mode operation, shows the programmed 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 available.

@2 SCANNING DISTRESS FREQUENCY INDICATOR

Shows the scanning distress frequency initials for DSC operation. (p. 43)

AGC

SELECTING A CHANNEL/FREQUENCY

CHANNEL GROUPS *

[GRP] changes in 20 channels steps. *2SITOR use— no group separation.

■ Selecting a channel

The transceiver has 160 user channels and ITU channels. However, the number of user channels can be optionally restricted.

Display selection

NOTE: Channel name (alphanumeric) may not ap-

pear during frequency indication depending on initial set mode setting. (p. 47)

FREQUENCY indication CHANNEL indication

16:23

RX J3E

SIMP

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

0 1 2 3 4A

Using the channel selector

The transceiver has two large controls for group selection and channel selection. The [GRP] changes channels in 20 channel increments and selects ITU channel groups; and the [CH] selects each channel.

q Rotate [GRP] to select the desired channel group

as shown at right and/or below.

w Rotate [CH] to select the desired channel.

[EXAMPLE]: Selection with the [GRP]

ITU SSB channels

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

DUP

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

DUP

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

0 1 2 3 4A

1 2 3

[CH][GRP]

Channel No. Description Channel No. Description Channel No. Description

1 to 160 User Ch.*

1201 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.*

8-1 to 8-9 8 MHz ITU simplex Ch. 2201 to 2253 22 MHz ITU duplex Ch.

SELECTING A CHANNEL/FREQUENCY

Using the keypad

Direct channel selection via the keypad is available for quick channel selection. q Enter the desired channel number via the keypad.

• Pushing [CE] clears input digits and retrieves the channel.

• 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 numbers 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

××

], [0

DIM

], [0

DIM

], [0

DIM

] then [1NB].)

w Push [ENT] to select the channel.

[EXAMPLE]: Selecting channel 158

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

---GPS---

Lat

59'N

RX J3E

SIMP

Using 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 frequency range between user channels 159 and 160.

Scan type selection is available in initial set mode. See p. 46 for the selection.

SCAN OPERATION

q Rotate [GRP] and [CH], or use the keypad to se-

lect your desired channel group.

• This operation is not necessary for programmed scan.

w Push [F] then [2

SQL

] to turn OFF the squelch

function, if programmed scan is selected.

e Push [F] then [3

SCAN

] to start the scan.

r To stop the scan, repeat step e again.

•[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.

RECEIVE AND TRANSMIT

■ Basic voice transmit and receive

q Check 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

××

] 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.

w Rotate [GRP] and [CH] to select the desired chan-

nel to be received.

•When receiving a signal, the S-meter shows the signal strength.

e Adjust [VOL] to the desired audio level when re-

ceiving a signal.

r Push [MODE

SET

] to select the desired operating

mode.

t Push [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).

y To 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 activated.

u Speak into the handset or microphone at your nor-

mal voice level.

•The RF meter shows the output power according to your voice level.

• If “SWR” appears, check your antenna system.

i Release the PTT switch to return to receive.

[RX CLAR]Microphone

connector

] [2 SQL]

[F]

■ Function for transmit

Transmit 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 monitored 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]

RECEIVE AND TRANSMIT

■ Functions for receive

Squelch function

The squelch function detects signals with voice components 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]

Noise 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 signals. In such cases, the noise blanker should be turned OFF.

➥ Push [F] then [1NB] 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]

AGC 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]

RF gain setting

The receiver gain can be reduced with the RF gain setting. This may help to remove undesired weak signals while monitoring strong signals.

Usually, the AGC function reduces the RF gain according to the receive signal strength and these weak signals are removed. However, during no signal reception, 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.

q Push [F] then [6RF-G] to select the RF gain set

mode, as shown below.

w Rotate [CH] to set the desired minimum cutting

level.

•

“0 (low sensitivity)” to “9 (max. sensitivity)” are available.

• S-meter shows the minimum permitted level.

e Push any key to exit the RF gain set mode.

■ Functions for receive (continued)

Clarity control

Voice signals received from other stations may be difﬁ- cult to receive. This may sometimes happen if a station is transmitting slightly off frequency. In such cases, you can compensate by using the clarity control.

q Push [F] then [RX

CLAR

] to switch the function ON

and OFF.

•“CLAR” and shifting value with direction appear.

w Rotate [CH] to improve the audio readability.

• Adjustable between ±150 Hz in 10 Hz steps.

[RX CLAR][CH] [F]

RECEIVE AND TRANSMIT

■ FSK operation

The transceiver has AFSK operation capability when an AFSK terminal unit is connected— use J2B for AFSK operation.

q Connect an AFSK terminal unit to the [AF/MOD]

socket as shown at right.

w Select the desired channel to operate AFSK mode. e Push [MODE

SET

] several times to select J2B.

r Operate 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

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

Tuner 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 particular 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.

•“THRU” appears instead of “TUNE” indicator.

• Push [TUNE

THRU

] to turn the function OFF.

[TUNE THRU] [F]

CHANNEL NAME PROGRAMMING

D Programming

q Select the desired channel to be programmed. w Push [FREQ/CH] to select channel indication

mode, if desired.

e Push [F] then [FREQ/CH].

• The 1st character for the channel names blinks.

r Rotate [CH] selector to select the character for

channel names.

• See the table below for available characters.

t Push the keypad several times to enter that char-

acter.

y Repeat steps r and t to enter the channel name. u Push [ENT] for 1 sec. to program the channel

name.

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

DUP

0 1 2 3 4A

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

DUP

0 1 2 3 4A

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

DUP

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 indicating 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

FREQUENCY PROGRAMMING

■ Frequency selection

Using the channel selector

q Select a channel which is programmed near the

frequency you want to receive.

w Push [RX

CLAR

] to select the frequency selection

mode.

•“≈” appears in the display.

e Rotate [GRP] to select the digit for tuning.

• Under-bar shows the selected digit.

r Rotate [CH] to tune the frequency.

•Pushing [Y]/[Z] on the microphone also tunes the fre- quency.

t Repeat steps e and r to complete the frequency

selection.

y To return to the previous frequency, push

[RX

CLAR

•“≈” disappears.

0123

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

The under-bar is moved by rotating [GRP].

0123

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

“Ç” and frequency show that the frequency can be changed.

Using 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.

q Rotate [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.

w Push [RX

CLAR

] to select the frequency selection

mode.

•“≈” appears in the display.

e Enter 4 to 6 digits of the desired frequency via the

keypad.

r Push [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.

0123

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

Select blank channel.

Push [RX

CLAR]

NB]

SQL], [3 SCAN],

], [5 AGC×]

DIM]

[ENT]

0123

---GPS---

Lat

59'N

Lon134

44'E

16:23

FREQUENCY PROGRAMMING

Quick Reference

■ Programming a frequency

Receive frequency

q Select the desired channel to be programmed.

• Channel 1 to 160 (maximum) are programmable.

w Push [RX

CLAR

] to select the frequency selection

mode.

e Enter 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.

r Push [MODE

SET

] several times to select the de-

sired operating mode (type of emission).

t Push [ENT] for 1 sec. to program the user chan-

nel.

• 3 beeps sound and “≈” disappears.

0123

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

“Ç” indicator disappears when programming is completed.

0123

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

0123

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

“Ç” indicator appears.

Transmit frequency

q Select the desired channel to be programmed. w Push [TX

TXF

e Enter 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.

r Push and hold [ENT] for 1 sec. to program the user

channel.

• 3 beeps sound.

0123

---GPS---

Lat

59'N

Lon134

44'E

16:23

RX J3E

SIMP

“TX” indicator disappears.

0123

---GPS---

Lat

59'N

Lon134

44'E

16:23

J3E

SIMP

0123

---GPS---

Lat

59'N

Lon134

44'E

16:23

“TX” indicator blinks.

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 reprogramming cannot be performed. This code is displayed during DSC watch mode.

Programming

q The following screen will be displayed briefly at

power ON when no MMSI code is programmed.

w Push [DSC] to select MMSI code programming

condition.

e Enter the speciﬁed 9-digit MMSI code via the key-

pad.

• Make sure the correct code is entered.

• Rotate [CH] to move the cursor.

r Push [ENT] to program the code.

• After pushing [ENT], DSC menu is displayed as below.

t Push [MODE

SET

] to exit the DSC menu.

******** Set up ********

--------

Select --------

Group

Call

frequency

Traffic

frequency

Scan

frqeuency

Watch

keeping receiver

MMSI

check

OKSEL

******** Set up ********

---------

MMSI ---------

ID:123456789

******** Set up ********

---------

MMSI ---------

ID:

†

________

<MMSI>

MMSI !

1.00

[MODE SET][ENT]

[DSC]

Quick Reference

DSC PREPARATION

■ Position and time programming

q While pushing and holding [MODE

SET

] push

[POWER] to enter initial set mode.

• Turn the power OFF in advance.

w Rotate [GRP] to select the “GPS DISPLAY” then

rotate [CH] to select the desired position indication type from simple and detail.

e Rotate [GRP] to select the “OFFSET TIME” then

rotate [CH] to set the time difference between local and the UTC times within –12 to +12 hours in 10 minute steps.

r Turn the power OFF once, then ON again to exit

quick set mode.

✔ When a position and the UTC time data

(IEC61162-1 format) is applied to [GPS], the following steps are not necessary.

t Push [DSC] to select DSC watch mode. y Push [MODE

SET

] to enter the DSC menu.

• DSC menu is displayed as below.

u Rotate [CH] to select “Position,” then push

[ENT].

i Enter your position and the UTC time via the key-

pad, then push [ENT].

•Push [3

SCAN

] for the ‘East,’ [9] for the ‘West,’ [6RF-G]

for the ‘North’ and [7] for the ‘South’ setting.

• Rotate [CH] to move the cursor.

o Push [ENT] to program the position and time.

• Return to the “DSC MENU” indication as in step u.

!0 Push [MODE

SET

] to exit the DSC menu.

•Rotate [CH] to select “Exit” then push [ENT] also

exits set mode.

•“MNL” appears instead of “GPS.”

******* Position *******

---

Position & time ----

Latitude Longitude

UTC

34.343N

135

34.343E

12:34

OKNull

******* DSC MENU *******

--------

Select -------Position Auto ACK Individual Group Geographical Position R E Q

OKSEL

*** SET MODE ***

ITEM SEL

*** SET MODE ***

SIMPLE DETAIL

ÇÇ

ITEM SEL

[POWER][MODE SET]

When no position and the UTC

(Universal Time Coordi-

nated)

time data in IEC61162-1 format, such as from a GPS receiver, etc., is applied to [GPS] connector, your position and the UTC time should be input for DSC operation.

IMPORTANT!

Manually programmed position and time data will be held for 23.5 hours only, and “?” symbol is displayed for all digits instead of the programmed data after 4 hours from programming. They are never renewed during the voyage when the position is set manually.

F1B

GPS

12.345.0

Exit

34.000N

135

34.000E 12:34

F1B

GPS

12.345.0

Exit

ACK

Lat

34'N

Lon135

34'E

12:34

• Simple position indication • Detail position indication

MMSI 123456789

MMSI

123456789

4 6 8 12

Unread

MSG

2 4 6 8 12 16

Unread

MSG

CALL PROCEDURE

■ Distress call

NEVER USE THE DISTRESS CALL WHEN YOUR SHIP OR A PERSON IS NOT IN AN EMERGENCY. DISTRESS CALLS CAN BE USED ONLY WHEN IMMEDIATE HELP IS NEEDED.

DSC menu

DSC WATCH screen DISTRESS screen

Distress nature selection

Position & UTC time confirmation/setting Subsequent selection

Call frequency selection

Push and hold [DISTRESS] for 5 sec.

• Simple distress call

• Regular distress call

DISTRESS

Push and hold [DISTRESS] for 5 sec.

DISTRESS

Rotate

Rotate Rotate

Rotate

******* Distress *******

---

Position & time ----

Latitude Longitude

UTC

†4 34.343N 135

34.343E

12:34

OKNull

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

F1B

8.414.5

Push 5sec. >

34 56.789N 123 45.678W 12:34

******* DSC MENU *******

--------

Select -------Position Auto ACK Individual Group Geographical Position R E Q Distress Distress

RLY Test Received Cal l L o g TX

memory

Set

Self

test

Exit

OKSEL

******* Distress *******

--------

Attempt -------

Single;six

frequency

Single;

2187.5kHz

Single;

4207.5kHz

Single;

6312.0kHz

Single;

8414.5kHz Single;12577.0kHz Single;16804.5kHz

OKSEL

******* Distress *******

Push

DISTRESS for 5sec

Telephony Telex-FEC

SEL

******* Distress *******

------

Subsequent ------

******* Distress *******

--------

Nature -------Undesignated Fire,Explosion Flooding Collision Grounding Capsizing Sinking Adrift Abandoning

ship Piracy Man

overboard

OKSEL

2 4 6 8 12 16

CALL PROCEDURE

DISTRESS CALLING screen While waiting for the acknowledgement

When the acknowledgement call is received.

After 5 sec., starts distress call.

F1B

8.414.5

Exit

34 56.789N 123 45.678W 12:34

J3E

Wait for ACK >

Exit

34 56.789N 123 45.678W 12:34

J3E

< ACK received >

Exit

34 56.789N 123 45.678W 12:34

When no acknowledgement is received

If no acknowledgement is received, the ICM801GMDSS automatically transmits the distress call again every 3.5 to 4.5 minutes.

CAUTION! DO NOT push [CANCEL] while waiting for an ac-

knowledgement, otherwise the distress call repeat is cancelled. Push [CANCEL] only when you want to cancel repeated transmission.

When “Simple distress call” is made;

The distress call is made with the following condition Nature : Undesignated Subsequence : Telephony (J3E) Call frequency : Six frequency

CALL PROCEDURE

■ Individual call

When you use DSC for general selective calling, perform as follows.

****** Individual ******

------

Address ID ------

Manual

set

IC-M801-1

123456789

IC-M801-2

123456788

IC-M801-3

123456787

IC-M801-4

123456786

IC-M801-5

123456785

OKSEL

******* DSC MENU *******

--------

Select -------Position Auto ACK Individual Group Geographical Position R E Q Distress Distress

RLY Test Received Cal l L o g TX

memory

Set

Self

test

Exit

OKSEL

****** Individual ******

------

Address ID ------

†

________

****** Individual ******

-------

Category ------Routine Safety Urgency

SEL

****** Individual ******

----

Call frequency ----

Manual

set

2177.0kHz IC-M801-1

2177.0kHz T: 2189.5kHz INTER2-1 R:

2177.0kHz

OKSEL

****** Individual ******

----

Call frequency ----

TX:

†

2177.0kHz

RX:_2177.0kHz

****** Individual ******

Traffic frequency ---

TX:_2134.0kHz RX:_2134.0kHz

****** Individual ******

---

1st telecommand ---Telephony Telex-FEC Telex-ARQ DATA

SEL

-- Traffic frequency --Manual

set

2134.0kHz Traffic-1

2134.0kHz

T:12345.0kHz

Traffic-2

R:12345.0kHz

OKSEL

****** Individual ******

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

Unread

MSG

DSC WATCH screen

DSC menu

Category selection

Address ID selection

Manual setting

Call frequency selection

Manual setting

Traffic frequency selection

1st telecommand selection

Rotate

CALL PROCEDURE

****** Individual ******

---------

Call --------To:IC-M801_1 Category:Routine Call Freq:TX 2177.0kHz

RX 2177.0kHz Traffic:Telephony

TX 2134.0kHz RX 2134.0kHz

Write-Menu

Call

F1B

GPS

Wait for ACK >

Individual

Lat

34'N

Lon135

34'E

12:34

Exit

************************ *

Individual ACK

IC-M801

Unable to comply

Operator unavailable *

************************

Exit

F1B

GPS

Individual

Lat 34 34'N Lon135

34'E

12:34

Exit

< Calling >

************************ *

Individual ACK

IC-M801

Able to comply

************************

Exit

Traffic

************************ *

Individual

ICOM M801

************************

ACKExit

≥

Start communication...

Confirmation screen

Start calling

After the call

✔

INFORMATION

The IC-M801GMDSS will not transmit the DSC call (except emergency call) even [CALL] is pushed and held when the set calling frequency is in busy. The transceiver waits the DSC call transmission until the calling frequency becomes clear in this case.

When no acknowledgement is received;

z Wait for 5 min., then call again on the same or a

different frequency.

x If no acknowledgement is received after a 2nd

call, wait for at least 15 min. before repeating the call.

Push and hold for 1 sec.

When receiving an acknowledgement, the display shows the received ID code, or the called station name.

When receiving an acknowledgement with “New traffic” selection, the display shows as the brand new individual call reception.

When the called station is unable to comply to the call, the reason may be displayed.

TX memory

channel

See p. 23 for details.

✔

For your information

When an acknowledgement call with “New traffic” selection is received, the voice communication cannot be started until the communication frequency (=traffic frequency) is decided between both stations.

CALL PROCEDURE

■ Group call

When you use DSC for calling the desired ship’s group, use “Group” menu.

********* Group ********

-------

Group ID -------

Manual

set

Group-1

023456789

Group-2

023456788

Group-3

023456787

Group-4

023456786

Group-5

023456785

OKSEL

********* Group ********

-------

Group ID -------

†

_______

******** Group *********

---

1st telecommand ---Telephony Telex-FEC

SEL

********* Group ********

Traffic frequency ---

TX:

†

2134.0kHz

RX:_2134.0kHz

********* Group ********

----

Call frequency ----

TX:

†

2177.0kHz

RX:_2177.0kHz

******* DSC MENU *******

--------

Select -------Position Auto ACK Individual Group Geographical Position R E Q Distress Distress

RLY Test Received Cal l L o g TX

memory

Set

Self

test

Exit

OKSEL

********* Group ********

----

Call frequency ----

Manual

set

2177.0kHz Group-1

2177.0kHz

2189.0kHz INTER2-1

2177.0kHz

OKSEL

********* Group ********

Traffic frequency ---

Manual

set

2134.0kHz Traffic-1

2134.0kHz

T:12345.0kHz

Traffic-2

R:12345.0kHz

OKSEL

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

DSC menu

Manual setting

1st telecommand selection

Group ID selection

Manual setting

DSC WATCH screen

Manual setting

Call frequency selection

Traffic frequency selection

Rotate

CALL PROCEDURE

********* Group ********

---------

Call --------To:Group-1 Category:Routine Call

Freq:TX 2177.0kHz

RX 2177.0kHz Traffic:Telephony

TX 2134.0kHz RX 2134.0kHz

Write-Menu

Call

******* TX memory ******

---------

Group -------To:Group-1 Category:Routine Call Freq:TX 2177.0kHz

RX 2177.0kHz

Traffic:Telephony

TX 2134.0kHz RX 2134.0kHz

Call

DEL

******* TX memory ******

---------

Select -------

0:Group

Group-1 1: 2: 3: 4: 5:

OKSEL

********* Group ********

---

memory write ---0: 1: 2: 3: 4: 5:

WriteSEL

J3E

GPS

Traffic >

Lat

34'N

Lon135

34'E

12:34

Exit

Group

Exit

Group

J3E

GPS

Lat

34'N

Lon135

34'E

12:34

< Calling >

Confirmaition screen

TX memory write channel selection

TX memory channel selection

Start calling...

Push and hold for 1 sec.

TX memory channel

See right for details.

Push and hold for 1 sec.

The IC-M801GMDSS has DSC TX memory. You can store often used DSC calling conditions for quick and simple re-call. Up to 10 conditions can be stored into the memory with the following instructions.

✔

CONVENIENT!

Confirmaition screen

Announce the information

Rotate

***** Geographical *****

-------

Category ------Safety Urgency

OKSEL

***** Geographical *****

----

Call frequency ----

2187.5kHz

4207.5kHz

6312.0kHz

8414.5kHz

12577.0kHz

16804.5kHz OK

SEL

***** Geographical *****

---------

Area ---------

OKSEL

Centre-point Area

***** Geographical *****

-----

Centre-point -----

Latitude

†_ __'N

Longitude

___ __'W

Range:_500nm

***** Geographical *****

---

1st telecommand ---Telephony Telex-FEC

SEL

***** Geographical *****

---------

Area ---------

Latitude

†_ N-H:__

Longitude

___ W-V:__

******* DSC MENU *******

--------

Select -------Position Auto ACK Individual Group Geographical Position R E Q Distress Distress

RLY Test Received Cal l L o g TX

memory

Set

Self

test

Exit

OKSEL

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

DSC menu

Category selection

Call frequency selection

DSC WATCH screen

Area selection

Centre-point input

Area input

1st telecommand selection

Rotate

CALL PROCEDURE

■ Geographical call

Use the geographical call when urgency or safety message announcement is necessary to the ships in the particular area.

--------- Call --------To

area: 14 N-H: 3

125 W-V: 3 Category:Safety Call

Freq:TX 2187.5kHz

RX 2187.5kHz

Traffic:Telephony

TX 2182.0kHz

RX 2182.0kHz

Write-Menu

Call

***** Geographical *****

< Calling >

F1B

GPS

Lat

34'N

Lon135

34'E

12:34

Exit

Geographical

J3E

GPS

Traffic >

Lat 34 34'N Lon135

34'E

12:34

Exit

Geographical

***** Geographical *****

Traffic frequency ---

TX:

†

2182.0kHz

RX:_2182.0kHz

***** Geographical *****

Traffic frequency ---

Manual

set

2134.0kHz Traffic-1

2134.0kHz

T:12345.0kHz

Traffic-2

R:12345.0kHz

OKSEL

✔ For your information 2— Centre-point input

When using the ‘Geographical’ call with “Centre-point” se- lection, calls vessels in the square area (“ ” area; not only round; “ ” area) are called.

Confirmation screen

Start calling...

Push and hold for 1 sec.

Announce the safety or urgency information

10˚N

100˚W

• Area setting example 1

Latitude

N-H:10

Longitude

100 W-V:20

20˚N

80˚W

20˚N/100˚W

10˚N

80˚W

• Area setting example 2

Latitude

S-H:10

Longitude

100 E-V:20

20˚S

120˚E

20˚S/100˚E

30˚S

120˚E

30˚S

100˚E

✔ For your information 1— Area input

When using the ‘Geographical’ call with “Area” selection, your original position is always the upper left hand corner in the world map as in the following illustration.

• Centre-point setting example

Centre-point

Range

TX memory

channel

See p. 23 for details.

Maual setting

Traffic frequency selection

Rotate

CALL PROCEDURE

■ Position request call

The position request call is used to conﬁrm the speci- ﬁed ship’s position. This calling system uses digital sig-

nals only, therefore a voice reply is not necessary.

***** Position R E Q *****

------

Address ID ------

Manual

set

IC-M801-1

001234567

OKSEL

***** Position RE Q *****

------

Address ID ------

†_

_______

***** Position R E Q *****

----

Call frequency ----

2187.5kHz

4207.5kHz

6312.0kHz

8414.5kHz

12577.0kHz

16804.5kHz OK

SEL

< Calling >

F1B

GPS

Lat

34'N

Lon135

34'E

12:34

Exit

Position R E Q

************************ *

Position ACK *

IC-M801-1

Lat 3 4 3 4 'N *

Lon135 12' E *

************************

***** Position R E Q *****

---------

Call --------To:IC-M801_1 Category:Safety Call Freq:TX 2187.5kHz

RX 2187.5kHz

Call

Write-Menu

F1B

GPS

Wait for ACK >

Lat

34'N

Lon135

34'E

12:34

Exit

Position R E Q

******* DSC MENU *******

--------

Select -------Position Auto ACK Individual Group Geographical Position R E Q Distress

OKSEL

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

≥

Exit

DSC menu

Address ID selection

Manual setting

Call frequency selection

Confirmation screen

Start calling...

While waitng for the acknowledgement

When the acknowledgement call is received

Push and hold for 1 sec.

TX memory

channel

See p. 23 for details.

DSC WATCH screen

✔ When no acknowledgement is received

q Wait for 5 min., then call again on the same or a

different frequency.

w If no acknowledgement is received after a 2nd

call, wait for at least 15 min. before repeating the call.

Rotate

CALL PROCEDURE

Quick Reference

■ Test call

Testing on the exclusive DSC distress and safety calling frequencies (such as 2187.5 kHz) should be avoided as much as possible by using other methods. When testing on the distress/safety frequency is unavoidable, it should be indicated that these are test transmissions.

Normally the test call would require no further communications between the two stations involved.

********* Test *********

------

Address ID ------

†

______

********* Test *********

----

Call frequency ----

Manual

set

2187.5kHz

OKSEL

********* Test *********

----

Call frequency ----

TX:

†

2187.5kHz

RX:_2187.5kHz

********* Test *********

---------

Call ---------

To:Port

ICOM Category:Safety Call

Freq:TX 2187.5kHz

RX 2187.5kHz

Call

F1B

GPS

Wait for ACK >

Test

Lat

34'N

Lon135

34'E

12:34

Exit

******* DSC MENU *******

--------

Select -------Position Auto ACK Individual Group Geographical Position R E Q Distress Distress

RLY Test Received Cal l L o g TX

memory

Set

Self

test

Exit

OKSEL

********* Test *********

------

Address ID ------

Manual

set

Port

ICOM 001234567

Port

ABC

001234566

Port

M801 001234565

OKSEL

************************ *

Test ACK

Port

************************

Exit

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

≥

DSC menu

Manual setting

Call frequency selection

Address ID selection

After the call

Confirmation screen

Manual setting

Test ACK screen

DSC WATCH screen

When receiving an acknowledgement, the display shows the received ID code, or ID name, if programmed.

Push and hold for 1 sec.

Start calling...

Rotate

WHEN RECEIVING A CALL

■ To receive a DSC call

The independent built-in DSC receiver circuit in the ICM801GMDSS scans all distress/safety frequencies, therefore, the “distress,” “urgency” and “safety” calls on those frequencies can be decoded at all times.

However, “routine” and “group” calls on the other fre- quencies are received via the transceiver’s receiver circuit. Therefore, the transceiver must set to DSC watch mode by pushing [DSC] to decode these calls.

When receiving a DSC call

One of the following actions should be performed when a DSC call is received depending on the received DSC format (or category):

•Wait for a voice transmission on the trafﬁc frequency.

• Transmit an acknowledgement with DSC or voice.

Display example and operation

• Monitoring the trafﬁc frequency

Monitor the communication between the calling ship and a coast station, or the calling station transmission via voice on the trafﬁc frequency.

•Emergency alarm sounds until pushing some key, or beeps sound, depending on the calling format or category.

• Transmit an acknowledgement

When the following DSC is received, an acknowledgement must be sent back to the calling station.

•Beeps, or an emergency alarm sounds until pushing some key, depending on the category.

✔

For your information

By rotating [CH], the received information can be read

(not all contents in some calling category)

without entering

DSC memory screen as described in the next page.

************************ *

Individual

ICOM M801

************************

TrafficExit

************************ *

Position REQ

ICOM M801

************************

ACKExit

************************ *

Polling REQ

001234567

************************

ACKExit

≥

************************ *

Distress ACK

001234567

************************

************************ *

Distress RLY

123456789

************************

TrafficExit

************************ *

Distress

123456789

************************

TrafficExit

************************ *

Group

ICOM M801

************************

TrafficExit

************************ *

Geographic

123456789

************************

TrafficExit

************************ *

Geographical

123456789

************************

TrafficExit

≥

WHEN RECEIVING A CALL

Quick Reference

■ Received information

When receiving a DSC call, the received format speciﬁer and its contents are memorized into the received call log. Distress calls (including other calls with a distress category) are stored separately from other calls.

Up to 20 distress and up to 20 other calls can be memorized.

q During DSC watch mode, push [RX

CLAR

] to enter

the received DSC memory select screen.

•Or, push [MODE

SET

], rotate [CH] to select “Re-

ceived Call Log” then push [ENT].

w Rotate [CH] to select the desired category from

“Distress” and “Others” then push [ENT].

•“Unread message” is displayed beside category

when a message have not been read is available in the category.

•“<No data>” is displayed beside category when no

received message is stored in the category.

e Rotate [CH] to select the desired DSC message.

•“*” means the DSC messages have not been read.

•“DTRS RLY” stands for distress relay.

• Distress memory screen

• Others memory screen

r Push [ENT] to indicate the contents.

•Rotate [CH] to scroll text to see hidden lines information.

t Push [ENT] to selects the trafﬁc screen and moni-

tor the trafﬁc frequency.

y Push [RX

CLAR

] to dispaly the DSC message

under the trafﬁc frequency indication.

•Rotate [CH] to scroll text to see hidden lines information.

•Push [RX

CLAR

] to return to the indication as step t.

u Push [FREQ/CH] to return to DSC watch mode.

NOTE:

When the DSC message with “?” symbol is selected in step e, the message “DATA ERROR” is displayed at the bottom of the line in memory contents screen in step r.

J3E

< Traffic >

Exit

Traffic

------- Distress ------Distress

ID:123456789 Undesignated Position:Lat

34'N Lon134 34'W UTC 12:34

Freq:TX 2187.5kHz

RX 2187.5kHz

Traffic:Telephony

TX 2182.0kHz RX 2182.0kHz

J3E

< Traffic >

Lat 34 34'N Lon135

34'E

12:34

Exit

GPS

MSG

** Received Cal l L o g ***

-------

Distress -------

Distress

ID:123456789

Undesignated Position:Lat

34'N Lon134 34'W UTC 12:34

Angle:123 Distance:1234nm RX

Freq:TX 2187.5kHz

RX 2187.5kHz

Traffic:Telephony

TX 2182.0kHz RX 2182.0kHz

DEL

OKCancel

** Received Cal l L o g ***

--------

Select --------

123456789 111111111 123123123 123456788

SEL

Individual Individual Geographic Individual

* *

** Received Cal l L o g ***

--------

Select -------Distress DTRS

ACK

DTRS

RLY Distress DTRS

ACK Distress

SEL

123456789 111111111 123123123 123123123 123123123 123234234

* * * *

** Received Cal l L o g ***

--------

Select -------Distress Others

Unread

message

Unread

message

OKSEL

WHEN RECEIVING A CALL

➥ When the desired memory contents to be deleted

are displayed as at right, push and hold [CE] for 1 sec.

•After erasing, the receive memory select screen, as in

step e of “■ Received information,” is selected automatically.

•The DSC memory, which 48 hours or more have been passed from received, can only be deleted.

** Received Cal l L o g ***

-------

Distress -------

Distress

ID:123456789 Undesignated Position:Lat

34'N Lon134 34'W UTC 12:34

Angle:123 Distance:1234nm RX

Freq:TX 2187.5kHz

RX 2187.5kHz

Traffic:Telephony

TX 2182.0kHz RX 2182.0kHz

DEL

OKCancel

■ Deleting a memory

WHEN RECEIVING A CALL

Quick Reference

■ Distress call

***** Distress RLY *****

-----

Select Call ------

Address

Area

OKSEL

J3E

Traffic >

Lat 34 34'N Lon135

34'E

12:34

Exit

GPS

************************ *

Distress

123456789 *

************************

TrafficExit

******* DSC MENU *******

--------

Select -------Position Auto ACK Individual Group Geographical Position R E Q Distress Distress

RLY Test Received Cal l L o g TX

memory

Set

Self

test

Exit

OKSEL

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

Unread

MSG

J3E

< Traffic >

Exit

Traffic

------- Distress ------Distress

ID:123456789 Undesignated Position:Lat

34'N Lon134 34'W UTC 12:34

Freq:TX 2187.5kHz

RX 2187.5kHz

Traffic:Telephony

TX 2182.0kHz RX 2182.0kHz

≥

D Distress relay call operation

When a distress call is received

Monitoring

DSC WATCH screen

Received DSC message indication

DSC menu

Distress relaly call selection

Continue to the next page

Distress call reception should stop after one sequence since the coast station should send back an ‘acknowledgement’ to the ship. If the distress call continues, the coast station may not be receiving the call. In such cases, you should contact the ship via the phone.

When the ship requires a ‘distress relay’ call or the ship appears not to reply, proceed as follows for ‘distress relay’ transmission.

Rotate

WHEN RECEIVING A CALL

Distress relay call operation— continued

***** Distress RLY *****

------

Address ID ------

Manual

set

Port

Icom1 001234567

Port

Icom2 001234568

Port

Icom3 001234569

OKSEL

***** Distress RLY *****

-----

Select Call ------

Address

Area

OKSEL

***** Distress RLY *****

------

Address ID ------

†

______

***** Distress RLY *****

--------

Select --------

SEL

123456789 987654321 Manual

set

***** Distress RLY *****

-----

Distress ID ------

Are

you sure?

†

________

***** Distress RLY *****

--------

Nature -------Undesignated Fire,Explosion Flooding Collision Grounding Capsizing

***** Distress RLY *****

---------

Area ---------

OKSEL

Centre-point Area

***** Distress RLY *****

-----

Centre-point -----

Latitude

†_ __'N

Longitude

___ __'W

Range:_500nm

***** Distress RLY *****

---------

Area ---------

Latitude

†_ N-H:__

Longitude

___ W-V:__

Area selection

Centre-point setting

Area setting

Rotate

Distress nature selection

Address ID selection

Distress relay call selection

Distress relay selection

Manual setting

Rotate

WHEN RECEIVING A CALL

Quick Reference

***** Distress RLY *****

---

Position & time ----

Latitude

Longitude

UTC

†4 34.343N 135

34.343E

12:34

OKNull

***** Distress RLY *****

----

Call frequency ----

2187.5kHz

4207.5kHz

6312.0kHz

8414.5kHz

12577.0kHz

16804.5kHz

OKSEL

***** Distress RLY *****

---------

Call ---------

Selected

distress

call is received

11H 34min

before To:001234567 Distress

ID:123456789 Undesignated Position

:Lat 34 34.000N

Lon134 34.000W

UTC 12:34 Call

Freq:TX 2187.5kHz

RX 2187.5kHz

Traffic:Telephony

TX 2182.0kHz RX 2182.0kHz

Call

< Calling >

F1B

GPS

Lat

34'N

Lon135

34'E

12:34

Exit

Distress RLY

J3E

GPS

Traffic >

Lat

34'N

Lon135

34'E

12:34

Exit

Distress RLY

Subsequent selection

Rotate

Telephony Telex-FEC

SEL

***** Distress RLY *****

------

Subsequent ------

Position & UTC time confirmation/setting

Call frequency selection

Confirmation screen

Start calling...

Push and hold for 1 sec.

Rotate

WHEN RECEIVING A CALL

■ Distress acknowledgement call

***** Distress ACK *****

--------

Select -------123456789 123456788

OKSEL

***** Distress ACK *****

---------

Call ---------

Distress

ID:123456789 Undesignated Position

:Lat 34 34.000N

Lon134 34.000W

UTC 12:34 Call

Freq:TX 2187.5kHz

RX 2187.5kHz

Traffic:Telephony

TX 2182.0kHz RX 2182.0kHz

Call

< Calling >

F1B

GPS

Lat

34'N

Lon135

34'E

12:34

Exit

Distress ACK

J3E

GPS

Traffic >

Lat

34'N

Lon135

34'E

12:34

Exit

J3E

Traffic >

Lat 34 34'N Lon135

34'E

12:34

Exit

GPS

************************ *

Distress ACK

123456789 *

************************

TrafficExit

******* DSC MENU *******

--------

Select -------Position Auto ACK Individual Group Geographical Position R E Q Distress Distress

ACK

Distress

RLY Test Received Cal l L o g TX

memory

Set

Self

test

Exit

OKSEL

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

Unread

MSG

≥

MSG

D Distress acknowledgement call operation

When a distress acknowledgement call is received Monitoring

DSC WATCH screen

DSC menu

Address ID selection

Confirmation screen

Start calling...

Push and hold for 1 sec.

Distress call reception should stop after one sequence since the coast station should send back an ‘acknowledgement’ to the ship. If the distress call continues even the coast station send back an ‘acknowledgement,’ the ship in distress may not be receiving the call. In such cases, you should contact the coast station via the phone and send back an ‘acknowledgement’ on be half of the coast station if the coast station requires.

NOTE: The distress acknowledgement call can be

made for the distress call received on

2187.5 MHz only. The “Distress ACK” selection in DSC menu screen will not be displayed when a distress call on another frequency, such as

8414.5 MHz, is received.

Rotate

WHEN RECEIVING A CALL

Quick Reference

■ Distress relay call

DSC menu

Distress relay call selection

When a distress relay call is received

DSC WATCH screen

Received DSC contents screen

D Distress relay acknowledgement call

operation

(available only when individual dis-

tress relay call is received)

Start calling...

Confirmation screen

Rotate

Push and hold for 1 sec.

*** Distress RLY ACK ***

--------

Select --------

SEL

001234567 007654321

*** Distress RLY ACK ***

---------

Call --------To:001234567 Distress

ID:123456789 Undesignated Position:Lat

34'N Lon134 34'W UTC 12:34

Call

Freq:TX 2187.5kHz

RX 2187.5kHz

Traffic:Telephony

TX 2182.0kHz RX 2182.0kHz

Call

************************ *

Distress RLY

001234567

************************

TrafficExit

******* DSC MENU *******

--------

Select --------

Position Auto ACK Individual Group Geographical Position R E Q Distress Distress

RLY

Distress

RLY ACK Test Received Cal l L o g TX

memory

Set

Self

test

Exit

OKSEL

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

MSG

J3E

Traffic >

Lat 34 34'N Lon135

34'E

12:34

Exit

GPS

TrafficExit

----- Distress RLY ----From:001234567 Distress

ID:123456789 Undesignated Position:Lat

34'N Lon134 34'W UTC 12:34

Freq:TX 2187.5kHz

RX 2187.5kHz

Traffic:Telephony

TX 2182.0kHz RX 2182.0kHz

J3E

Traffic >

≥

WHEN RECEIVING A CALL

■

Individual call

When receiving an Individual call, beeps may sound (or the emergency alarm depending on the category) and the display below appears.

** Received Cal l L o g ***

------

Individual ------

From:ICOM

M801 Category:Routine RX

Freq:TX 12345.0kHz

RX 12345.0kHz

Traffic:Telephony

TX 2345.0kHz RX 2345.0kHz

DEL

ACKCancel

**** Individual ACK ****

--------

Comply -------Able Unable New

traffic

DEL

ACKCancel

************************ *

Individual

ICOM M801

************************

ACKExit

Calling station’s name appears when the same ID is preprogrammed.

**** Individual ACK ****

---------

Call ---------

To:ICOM

M801 Category:Routine Call

Freq:TX 12345.0kHz

RX 12345.0kHz

Traffic:Telephony

TX 2345.0kHz

RX 2345.0kHz

Call

-- Traffic frequency ---

Manual

set

2134.0kHz SHIP

2134.0kHz

T:12345.0kHz

IC-M801-2

R:12345.0kHz

OKSEL

**** Individual ACK ****

-- Traffic frequency ---

TX:_2134.0kHz RX:_2134.0kHz

**** Individual ACK ****

J3E

Traffic >

Lat

34'N

Lon135

34'E

12:34

Exit

GPS

Individual

ACK

≥

When an individual call is received

Received call log screen

Comply selection

New traffic

frequency selection

Confirmation screen

Manual setting

Push and hold for 1 sec.

Go to “Confirmation screen” on p. 21.

✔

For your information

When an acknowledgement call with “New traffic” selection is made, the voice communication cannot be started until the communication frequency (=traffic frequency) is decided between both stations.

Start calling...

Start communication...

Rotate

WHEN RECEIVING A CALL

**** Individual ACK ****

--------

Comply --------

reason given Busy Channel

unable

Mode

unable

Operator

unavailable

operator Station

barred

Equipment

disable Congestion Queue

indication

SEL

**** Individual ACK ****

---------

Call ---------

To:ICOM

M801 Category:Routine Unable

comply

Reason:

Operator unavailable

Call

Freq:TX 12345.0kHz

RX 12345.0kHz

Call

******* Auto ACK *******

--------

Select -------Manual set Abl e t o comply Unable to comply

SEL

******* Auto ACK *******

--------

Reason -------No reason given Busy Channel unable Mode unable Operator unavailable No operator Station barred Equipment disable Congestion Queue indication

SEL

******* DSC MENU *******

--------

Select -------Position Auto ACK Individual Group Geographical Position R E Q Distress Distress

RLY Test Received Cal l L o g TX

memory

Set

Self

test

Exit

OKSEL

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

MSG

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

MSG

Confirmation screen

“Unable”

reason selection

DSC menu

DSC WATCH screen

ACK selection

D Auto ACK setting

“Unable”

reason selection

Push and hold for 1 sec.

✔

About “Auto ACK” setting

When “Able to comply” or “Unable to comply” is selected with Auto ACK setting as at right, the acknowledgement call is made automatically— no acknowledgement call operation is necessary.

When “Manual set” is selected, acknowledgement call operation is necessary, however, the acknowledgement call with the reason “No operator” is made automatically when no operation is performed for 25 sec. from the call reception.

Start calling...

Rotate

WHEN RECEIVING A CALL

■ Group call

************************ *

Group

ICOM M801

************************

TrafficExit

Calling station’s name appear when the same ID is preprogrammed.

J3E

Traffic >

Lat

34'N

Lon135

34'E

12:34

Exit

GPS

Group

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

Unread

MSG

≥

MSG

When a group call is received Traffic screen

DSC WATCH screen

■ Polling call

************************ *

Polling REQ

001234567

************************

ACKExit

** Received Cal l L o g ***

-----

Polling REQ -----From:001234567 Category:Routine RX Freq:TX 2177.0kHz

RX 2177.0kHz

ACK

Cancel

***** Polling ACK ******

To:001234567 Category:Routine RX Freq:TX 2177.0kHz

RX 2177.0kHz

Call

--------- Call ---------

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

MSG

≥

When a polling request call is received

Received call log screen

Conrimation screen

DSC WATCH screen

Push and hold for 1 sec.

Start calling...

WHEN RECEIVING A CALL

■ Geographical area call

NOTE: The IC-M801GMDSS will not function for the

geographical call when your position is out of the speciﬁed area.

ACK

************************ *

Position REQ

ICOM M801

************************

Exit

** Received Cal l L o g ***

-----

Position REQ -----

From:ICOM

M801 Category:Safety RX

Freq:TX 12345.0kHz

RX 12345.0kHz

ACK

Cancel

***** Position ACK *****

---

Position & time ----

Latitude Longitude

UTC

34.567N

134 34.567W

12:34

Null

***** Position ACK *****

---------

Call ---------

To:ICOM

M801 Category:Safety Position

:Lat 34 34.567N

Lon134 34.567W UTC 12:34

Call

Freq:TX 12345.0kHz

RX 12345.0kHz

Call

Push and hold for 1 sec.

ACK

F1B

GPS

12.345.0

Exit

Lat

34'N

Lon135

34'E

12:34

MMSI 123456789

2 4 6 8 12 16

Unread

MSG

Appears and operation is necessary only when “Manual set” is selected for Auto ACK setting. (p. 48)

≥

When a position request is received

Received call log screen

Position & UTC time confirmation

Confirmation screen

DSC WATCH screen

Rotate

Start calling...

■ Position request call

When a geographical call is received Monitoring

************************ ************************

* *

************************ ************************

Geographical

Geographic

123456789 123456789

TrafficExit

* *

≥

DSC WATCH screen

2 4 6 8 12 16

Geographical

Traffic >

GPS

Exit

Lat Lon134

MSG

12:34

MMSI 123456789

12.345.0

Exit

Lat

GPS

Lon135

MSG

F1B

12:34

J3E

34'N 34'E

ACK

34'N 34'E

MEMORY OPERATION

■ Memory description

The IC-M801GMDSS has several kinds of memories as follows:

• Address and group ID code memories (p. 41)

• Call, trafﬁc and scan frequency memories (p. 42)

•DSC transmission memory (described in this section)

• Received message memory (p. 29)

■ Memory writing

10 DSC transmission memory channels allow you to set often used format speciﬁers and contents such as for routine calls, group calls, etc.

q During DSC watch mode, select the desired format

category (except distress and test), and set the message, call and trafﬁc frequencies until the call stand-by screen is displayed as described in the CALL PROCEDURE section (pgs. 18–27).

w Push and hold [ENT] for 1 sec. to select the TX

memory write condition.

e Rotate [CH] to select the desired memory channel.

r Push and hold [ENT] for 1 sec. again to store the

condition into the selected memory channel.

•The set DSC format and calling station ID/name appear.

t Push [ENT] to return to the calling stand-by condi-

tion, or push [MODE

SET

] to return to DSC watch

mode.

--- TX memory write ---0:Individual

987654321 1: 2: 3: 4: 5:

OKSEL

--- TX memory write ---0: 1: 2: 3: 4: 5:

WriteSEL

■ Memory reading/transmitting/deleting

q Push [DSC] to select DSC watch mode, if neces-

sary.

w Push [TX

TXF

] to enter the DSC transmit memory

screen.

•Or, push [MODE

SET

], rotate [CH] to select “TX

memory” then push [ENT], also selects the transmit memory screen.

e Rotate [CH] to select the selected memory chan-

nel to be read.

r Push [ENT] to display the memory contents.

t Operate as follows:

➥ When reading the memory contents only;

•Push [MODE

SET

] to return to DSC watch

mode.

➥ When transmitting the memory contents;

• Push and hold [CALL] for 1 sec.

➥ When clearing the memory contents;

• Push and hold [CE] for 1 sec.

****** TX memory *******

------

Individual -----To:987654321 Category:Routine Call Freq:TX 2187.5kHz

RX 2187.5kHz

Traffic:Telephony

TX 2134.0kHz RX 2134.0kHz

DEL

Call

****** TX memory *******

--------

Select --------

0:Individual

987654321 1: 2: 3: 4: 5:

OKSEL

DSC MENU OPERATION

Quick Reference

■ General

Up to 100 ID codes with frequency and name can be programmed in MENU mode for easy recall during DSC call setting.

In addition, the following settings/operation are available in DSC setup menu.

• Manual position/time setting (p. 17)

•Self-ID (MMSI code) indication (described in this sec-

tion; p. 43)

■ ID input

A total of 100 ID codes can be programmed as “Address ID” (for ships and coast stations) and “Group ID” (for group stations).

A pair of frequencies (both transmit and receive) and ID name are also programmed together with the ID code which are used as call frequencies when using the ID code.

q During DSC menu indication, rotate [CH] to select

“Set up” then push [ENT] to select setup menu.

• The select screen is displayed as below.

w Rotate [CH] to select the “Address ID” or

“Group ID,” then push [ENT].

• The address/group ID list screen is displayed.

When the memory is full:

“Memory full” is displayed beside “<add>” indication when 100 ID codes have been programmed. Delete any unnecessary IDs in such cases (see

p. 44 for delete)

e Rotate [CH] to select “<add>” then push [ENT].

• The address/group ID setup screen is displayed.

r Push the numeral keys to input the desired 10-digit

ID name, 9-digit code and both transmit and receive frequencies, then push [ENT].

• Rotate [CH] to move the cursor.

•When entering group code, enter “0 (zero)” for the ﬁrst

digit.

•The frequencies entered should be within the marine frequency ranges as follows.

1.6– 2.9999 MHz 4.0– 4.9999 MHz

6.0– 6.9999 MHz 8.0– 8.9999 MHz

12.0–13.9999 MHz 16.0–17.9999 MHz

18.0–19.9999 MHz 22.0–22.9999 MHz

25.0–27.5000 MHz

t Push [ENT] to program the contents into the ad-

dress or group ID.

•

Returns to the address/group ID list screen automatically.

•The ID list is displayed in alphabetical order for ID name, so [CH] rotation may be necessary for the programmed ID conﬁrmation.

y Push [MODE

SET

] to return to DSC watch mode,

or push [FREQ/CH] to return to the select screen.

******** Set up ********

------

Address ID ------

********

Set up ********

-------

Group ID ------<add> ICOM

M801 012345678

SEL

Cancel

******** Set up ********

------

Address ID ------

******** Set up ********

-------

Group ID -------

Name:ICOM_M801_ ID:012345678 TX:_2345.0kHz RX:_2345.0kHz

Cancel

******** Set up ********

------

Address ID ------

********

Set up ********

-------

Group ID -------

Name:

†

_________ ID:0________ TX:_____._kHz RX:_____._kHz

Cancel

******** Set up ********

------

Address ID ------

******** Set up ********

-------

Group ID -------

<add>

SEL

Cancel

******** Set up ********

--------

Select --------

Address

Group

Call

frqeuency

Traffic

frqeuency

Scan

frqeuency

Watch

keeping receiver

MMSI

check

SEL

SETTING PROCEDURES:

DSC MENU OPERATION

■ Frequency input

A total of 50 frequency pairs can be programmed as “Call frequency,” “Traffic frequency” or “Scan frequency.” The frequency usage and frequency name are also programmed together with the frequency.

SETTING PROCEDURES:

NOTE: Up to 6 pairs of frequencies only can be as-

signed as a scan frequency. They are scanned during DSC watch mode only. (Different from the distress/safety frequencies.)

q During DSC menu indication, rotate [CH] to select

“Set up” then push [ENT] to select setup menu.

• The select screen is displayed.

w Rotate [CH] to select the “Call frequency,”

“Traffic frequency” or “Scan frequency,” then push [ENT].

• The call/trafﬁc/scan frequency list screen is displayed.

When the memory is full:

“Memory full” is displayed beside “<add>” indication when a total of 50 pairs of frequencies (6 pairs for scan frequency) have been programmed. Delete any unnecessary frequency in such cases (see p. 44 for delete).

e Rotate [CH] to select “<add>” then push [ENT].

•The call/traffic/scan frequency setup screen is dis-

played.

r Push the numeral keys to input the desired 10-

character frequency name, and both transmit and receive frequencies, then push [ENT].

• Rotate [CH] to move the cursor.

•The frequencies entered should be within the marine

frequency ranges as follows.

1.6– 2.9999 MHz 4.0– 4.9999 MHz

6.0– 6.9999 MHz 8.0– 8.9999 MHz

12.0–13.9999 MHz 16.0–17.9999 MHz

18.0–19.9999 MHz 22.0–22.9999 MHz

25.0–27.5000 MHz

t Push [ENT] to program the contents into a call,

trafﬁc or scan frequency.

•Returns to the call/trafﬁc/scan frequency list screen.

•The programmed frequency is displayed at the bottom

line, so [CH] rotation is necessary for the programmed frequency conﬁrmation.

y Push [MODE

SET

] to return to DSC watch mode,

or push [FREQ/CH] to return to the select screen.

******** Set up ********

********

Set up ********

Traffic frequency ---

----

Call frequency ----

********

Set up ********

----

Scan frequency ----

<add>

4567.0kHz ICOM Group

4567.0kHz

SEL

Cancel

******** Set up ********

********

Set up ********

Traffic frequency ---

----

Call frequency ----

********

Set up ********

----

Scan frequency ----

Cancel

Comment:ICOM_Group TX:_4567.0kHz RX:_4567.0kHz

******** Set up ********

********

Set up ********

Traffic frequency ---

----

Call frequency ----

********

Set up ********

----

Scan frequency ----

Cancel

Comment:†_________ TX:_____._kHz RX:_____._kHz

******** Set up ********

********

Set up ********

Traffic frequency ---

----

Call frequency ----

********

Set up ********

----

Scan frequency ----

<add>

SEL

Cancel

DSC MENU OPERATION

■ Verifying self-ID

➥ During setup select menu indication, rotate [CH] to

select “MMSI check” then push [ENT] to display the programmed MMSI ID (self-ID).

➥ Push [DSC] to select DSC watch mode. ➥ Push [MODE

SET

] to select DSC menu.

➥ Rotate [CH] to select “Set up” then push [ENT].

•Push [MODE

SET

] to return to DSC watch mode, or

push [FREQ/CH] to return to the select screen.

******** Set up ********

------

MMSI check ------

ID:123456789

1.00

Cancel

■ Self testing

According to regulations, the IC-M801GMDSS has a self testing capability to check the internal AFSK encoder and decoder circuits without signal transmission via the transceiver.

q During DSC watch mode, push [MODE set] to se-

lect DSC menu.

w Rotate [CH] to select “Self test” then push

[ENT] to start the self test.

e “OK” is displayed when both encoder and decoder

functioning correctly.

If the circuit has a problem, the following message is displayed.

•Both or either message is/are displayed depending on problem.

DSC-RX NG : DSC receiver’s decoder circuit has a

problem.

TRANSC NG : Transceiver’s encoder or decoder

circuit has a problem.

****** Self test *******

DSC-RX

TRANSC

Cancel

****** Self test *******

Cancel

****** Self test *******

Testing...

Cancel

■ Scanning distress frequency selection

q During DSC menu indication, rotate [CH] to select

“Set up” then push [ENT] to select setup menu.

• The select screen is displayed.

w Rotate [CH] to select the “Watch keeping

receiver,” then push [ENT].

•Six distress frequencies for DSC operation are displayed.

e Rotate [CH] to select the desired distress

frequency then push [ENT].

r Rotate [CH] to turn the selected frequency then

push [ENT].

•“2187.5 kHz” and “8414.5 kHz” cannot be turned OFF.

t Push [MODE

SET

] to return to DSC watch mode,

or push [FREQ/CH] to return to the select screen.

*Watch keeping receiver*

------

4207.5kHz ------OFF ON

SEL

-Watch keeping receiver-

2187.5kHz

4207.5kHz

6312.0kHz

8414.5kHz

12577.0kHz

16804.5kHz

SEL

******** Set up ********

DSC MENU OPERATION

■ Memory reading/deleting

q During setup select menu indication, rotate [CH] to

select the desired memory item then push [ENT].

• Push [DSC] to select DSC watch mode.

• Push [MODE

SET

] to select DSC menu.

• Rotate [CH] to select “Set up” then push [ENT].

w Rotate [CH] to select the desired memory, then

push [ENT].

e Operate as follows:

➥ When reading the memory contents only;

•Push [ENT] to return to the appropriate memory list screen.

➥ When deleting the memory contents;

• Push and hold [CE] for 1 sec.

-After deleting, the appropriate memory list screen is displayed automatically.

******** Set up ********

********

Set up ********

Traffic frequency ---

----

Call frequency ----

********

Set up ********

----

Scan frequency ----

DEL

Comment:ICOM Group TX:

4567.0kHz

RX:

4567.0kHz

******** Set up ********

------

Address ID ------

********

Set up ********

-------

Group ID -------

DEL OK

Name:ICOM M801 ID:012345678 TX:

2345.0kHz

RX:

2345.0kHz

■ Printing out the DSC memory contents

The received DSC call contents can be printed out when a printer (IBM

centronics or compatible) is con-

nected to the transceiver. The automatic print out capability when a DSC call is received is available in initial set mode.

(p. 48)

q Select the desired received DSC memory as de-

scribed in “Received information” (p. 29). ➥ During DSC watch mode, push [RX

CLAR

] to

enter the received DSC memory select screen.

•Or, push [MODE

SET

], rotate [CH] to select “Re-

ceived Call Log” then push [ENT].

➥ Rotate [CH] to select the desired category from

“Distress” and “Others” then push [ENT].

•“Unread message” is displayed beside cate-

gory when an unread message is stored in the category.

•“<No data>” is displayed beside category when

no received message is stored in the category.

➥ Rotate [CH] to select the desired DSC message.

•“*” means the DSC messages have not been read.

•“DTRS RLY” stands for distress relay.

w Push [ENT] to indicate the contents. e After pushing [F], push [8

PRN

] for 1 sec. to print

out the selected DSC memory contents.

[8 PRN]

[F]

SET MODE

Quick Reference

■ Quick set mode

Entering quick set mode

q Push [F] then [MODE

SET

] to enter quick set mode.

• Select voice or e-mail operation mode in advance.

w Rotate [GRP] to select the desired item. e Rotate [CH] to set the values or conditions for the

selected item.

r Push any key to exit quick set mode.

[MODE SET]

[CH][GRP]

[F]

Quick set mode items

Squelch level

This item adjusts the squelch threshold level from 1 to 100. (default: 30)

When the squelch is activated, signals stronger than this set level only are received.

ITEM SEL

Dimmer

This item sets the LCD backlight brightness for dimmer selection from 0 (dark) to 10 (bright).

By pushing [F] then [0

DIM

], the set brightness is selected to provide easy visibility during night time operation, etc. (default: 6)

ITEM SEL

LCD contrast

This item sets the LCD contrast from 1 to 10.

(default: 7)

ITEM SEL

Noise blanker level

This item adjusts the noise blanker level to protect a signal from various pulse-type noises from 1 to 10.

(default: 5)

The set level is effective when the noise blanker is activated.

ITEM SEL

SET MODE

■ Initial set mode

Initial set mode operation is used for programming infrequently changed values, conditions or functions.

Entering set mode

q Turn the power OFF, if the transceiver is powered

ON.

w While pushing [MODE

SET

], push [POWER] to turn

the power ON to enter initial set mode.

e Rotate [GRP] to select the desired item. r Rotate [CH] to set the values or conditions for the

selected item.

t Turn the power OFF and ON again to exit set mode.

Initial set mode items

NOTE: Selection of some of the set mode items de-

scribed here are not available on some transceiver versions.

[POWER][MODE SET]

Number of user channels

This item sets the number of user channels. Up to 160 channels can be set. (default: 160)

*** SET MODE ***

ITEM SEL

FSK ITU channel selection

This item sets the capability of the ITU channels for FSK from ON and OFF. This item will not appear when ITU channels are inhibited. (default: ON)

*** SET MODE ***

ITEM SEL

OFF ON

ÇÇ

Automatic tune

When an optional automatic antenna tuner is connected, tuning can be started automatically without pushing [TUNE

THRU

], for instant operation.

If manual tuning is required, this automatic operation can be deactivated. (default: OFF)

*** SET MODE ***

OFF ON

ÇÇ

ITEM SEL

Scan type

This item selects one of the following scan functions.

Programmed scan searches signals within the frequency range and activates slowly while squelch is open and fast while squelch is closed.

Channel scan and channel resume scan searches 20 channels around a user selected channel, or searches all ITU channels in the band when an ITU channel is selected. (default: CH SCAN)

*** SET MODE ***

SCAN

CH-RESUME

SCAN

PROGRAM

SCAN

ÇÇ

ITEM SEL

SET MODE

Initial set mode items (continued)

Scan speed

This item adjusts the scan speed (rate at which channels are searched). The scan speed can be set from 1 to 10 with “1” being the fastest and “10” being the slowest. (default: 4)

*** SET MODE ***

ITEM SEL

Display type

The upper half of the display can be set to display a programmable channel name or a receive frequency according to your needs.

(default: CH-FREQUENCY)

*** SET MODE ***

CH-FREQUENCY CH-NAME

ÇÇ

ITEM SEL

Microphone keys

This item activates/deactivates the keys on the optional HM-135

HAND MICROPHONE

([P], [∫] and [√]).

Refer below on how to program the [P] key.

(default: OFF)

*** SET MODE ***

OFF ON

ÇÇ

ITEM SEL

Voice squelch

This item turns the voice squelch function ON and OFF when operating in J3E and H3E modes. When the function is set to OFF, the squelch acts as an S-meter squelch for J3E and H3E modes.

(default: ON)

*** SET MODE ***

OFF ON

ÇÇ

ITEM SEL

REMOTE ID

This item selects the ID for the transceiver from 1 to

99. (default: 11)

*** SET MODE ***

ITEM SEL

[P] key function

✔ This item appears only when “ON” is selected in

MIC KEY setting as above. This item assigns a function to the [P] key on the optional HM-135

HAND MICROPHONE

to activate it the

same as if making the key operation for [TUNE

THRU

[MODE

SET

], [F]+[1NB], [F]+[2

SQL

], [F]+[3

SCAN

[F]+[4

] or [F]+[5

AGC

]. (default: MODE)

*** SET MODE ***

TUNE MODE NB SQL

ÇÇ

ITEM SEL

SET MODE

Initial set mode items (continued)

Automatic print out

This item turns the automatic print out function ON and OFF when receiving a DSC call.

• OFF : Prints out the received DSC contents

manually.

• ON : Prints out the received DSC contents

automatically. (default)

*** SET MODE ***

OFF ON

ÇÇ

ITEM SEL

Automatic acknowledgement

This item turns the automatic acknowledgement function ON and OFF when receiving a DSC call.

• OFF : Sends back an acknowledgement call

manually.

• ON : Sends back an acknowledgement call

automatically when a DSC call is received. (default)

*** SET MODE ***

OFF ON

ÇÇ

ITEM SEL

Medical transport

This item enables medical transport call.

• OFF : No medical transport call is available.

(default)

• ON : Medical transpot call is available.

*** SET MODE ***

OFF ON

ÇÇ

ITEM SEL

Neutral ship

This item enables neutral ship call.

• OFF : No neutral ship call is available. (de-

fault)

• ON : Neutral ship call is available.

*** SET MODE ***

OFF ON

ÇÇ

ITEM SEL

Offset time

Set the offset time between the UTC and local time within –12:00 to +12:00 in 10 minutes steps.

(default: 0:00)

*** SET MODE ***

ITEM SEL

Position indication type

Select the position indicating type from simple and detail.

• SIMPLE : Hides second digits (default)

• DETAIL : Shows second digits

*** SET MODE ***

SIMPLE DETAIL

ÇÇ

ITEM SEL

SET MODE

Quick Reference

DSC data out

This item selects the DSC and DSE data output to the connected external unit, such as plotter, to [REMOTE] when receiving a DSC call.

• OFF : No data is output even when a DSC call

is received. (default)

• ADDRESS ID

: DSC and DSE data is output when the

DSC call includes the stored address ID or group code is received.

• ALL : DSC and DSE data is output when a

DSC call is received, even the call for other stations.

*** SET MODE ***

OFF ADDRESS

ALL

ÇÇ

ITEM SEL

CONNECTION AND INSTALLATION

■ Supplied accessories

The following accessories are supplied with ICM801GMDSS.

q Handset …………………………………………… 1 w External speaker ………………………………… 1 e Mounting bracket kit for remote controller … 1 set r Mounting bracket kit for speaker …………… 1 set t Mounting angles for main unit ……………… 1 set y DC power cable (Red and Black) …………… 1 pair u RCA cable (for GPS connection) ………………… 1 i Remote control cable (OPC-1466) ……………… 1 o Hex head bolts (M6×50) ………………………… 6

!0 Hex head bolts (M6×15) ………………………… 6 !1 Spring washers (M6) …………………………… 18 !2 Flat washers (M6) ……………………………… 18 !3 Hex nuts (M6) ……………………………………… 6 !4 Spare fuses (FGB 5 A) …………………………… 2 !5 Weatherproof caps ……………………………… 2 !6 Tuner connector kit …………………………… 1 set !7 Ferrite core (for power cable) …………………… 1 !8 Ferrite core (for antenna tuner receptacle) …… 1

qew

r u

!2 !7 !8

!4 !5 !6

CONNECTION AND INSTALLATION

Quick Reference

■ Basic connections

CAUTION:

• After connecting the external speaker, antenna and tuner control cables, cover the connectors with a rubber vulcanizing tape, etc., as shown below, to prevent water seeping into the connector.

• DO NOT pull the antenna and control cable recep- tacles. This may cause cable disconnection (in the tuner unit), inside connector damaged or a bad connection.

NOTE:

Turn [DC ISOLATE] (on the IC-M801GMDSS main unit) OFF, or charge the battery during anchor, otherwise the battery may be exhausted. The IC-M801GMDSS has a high-stability ovenheater type crystal oscillator, and the oscillator’s heater is connected to the DC power terminals directly, it keeps its temperature to at the specified level even if the transceiver power with the remote controller has turned OFF.

IMPORTANT!: Antenna for DSC reception should be connected, otherwise no DSC call can be received.

Rubber vulcanizing tape

HF antenna

(for DSC reception)

Grounding (see p. 53)

24 V battery

Ferrite core (see pgs. 54, 55)

[DC ISOLATE]

External speaker

Remote controller

Transceiver’s main unit

AT-141

IC-M801GMDSS

NOTE: MUST BE USED WITH ICOM

AT-141.

CONNECTION AND INSTALLATION

■ Advanced connections

CAUTION: Any connected external unit, such as

printer, etc., must be properly grounded. We suggest using a wide copper strap. (p. 53)

24 V battery

Modem, NBDP (Narrow Band Direct Printing), FAX systems

Position and

UTC time data

(IEC61162-1:2000)

Printer

(IBM® centronics or compatible)

Remote controller

(IEC61162-1: 2000 data input)

CONNECTION AND INSTALLATION

Quick Reference

■ Ground connection

The transceiver and antenna tuner MUST have an adequate RF ground connection. Otherwise, the overall efﬁciency of the transceiver and antenna tuner installation will be reduced. Electrolysis, electrical shocks and interference from other equipment could also occur.

For best results, use 50 or 75 mm (2 or 3 inches) wide copper strap and make the connection as short as possible. Ground the transceiver and antenna tuner to one ground point, otherwise the voltage difference (in RF level) between 2 ground points may cause electrolysis.

R WARNING— When grounding to a metal hull

Use Zinc anodes to protect the hull from electroly-

sis.

Ask your technical dealer, installer or refer to a technical book, etc., for RF grounding details.

CAUTION: NEVER connect the transceiver to a “positive-grounded ship,” otherwise the transceiver will not function.

Ground system example

Best ground points

• External ground plate

• Copper screen

• Copper foil

Acceptable ground point

• Stainless steel stanchion

• Through mast

• Through hull

• Metal water tank

Undesirable ground points

• Engine block

• Ship’s DC battery ground

Un-usable ground points

(these connections may cause an explosion or electrical

shock)

• Gas or electrical pipe

• Fuel tank or oil-catch pan

See antenna and grounding considerations section (pgs. 71–73) for more details.

Copper pipe Metal object Copper screen

CONNECTION AND INSTALLATION

■ Power source

The transceiver requires a regulated DC power of

26.4 V and at least 30 A.

•Direct connection to 24 V battery in your ship through the supplied DC power cable.

R WARNING! NEVER connect the transceiver to a battery using reverse polarity. This will damage the transceiver. CATION: Before connecting the transceiver main unit to a battery, make sure the transceiver input voltage suits to the battery voltage.

DC power cable connection

NOTE: Use terminals for the cable connection.

• Weatherproof cap attachment

Attach the supplied weatherproof cap for each positive and negative line at the DC power terminal as shown below.

Weatherproof cap

Bend the lug 90°

24 V

battery

Supplied DC power cable

+ red

_ black

Crimp

Solder

• Ferrite core attachment

The DC power cables should be connected to the transceiver’s main unit through the supplied ferrite core as described below. And the ferrite core must be placed as near as possible to the main unit.

Ferrite core

DC power cables

CONNECTION AND INSTALLATION

■ Antenna

Most stations operate with a whip or long wire (insulated backstay) antenna. However, these antennas cannot be connected directly to the transceiver since their impedance will not be matched with the transceiver antenna connector.

R DANGER: HIGH VOLTAGE! NEVER touch the antenna element/wire while tun-

ing or transmitting.

Antenna wire

AT-141

• Ferrite core attachment

Attach the supplied ferrite core to the antenna tuner receptacle as the illustration below.

CONNECTION AND INSTALLATION

■ Mounting

D Mounting location

Select a location that provides easy access to the controller for navigation safety, has good ventilation and is not subject to sea spray. The controller should be at 90 degrees to your line of sight when operating it.

CAUTION: KEEP the transceiver and handset or microphone at least 1 meter away from your ship’s magnetic navigation compass.

Check the installation angle; the display may not be easy to read at some angles.

Mounting the controller/speaker

CONNECTION AND INSTALLATION

Mounting angle attachment

q Attach the supplied rubber feet to the mounting

angle, if desired.

w Attach the mounting angles using with the supplied

hex head bolts (M6×15), ﬂat and spring washers as illustrated below.

Hex head bolt (M6×15)

Flat washer

Mounting angle

Spring washer

Mounting the main unit

Hex head bolt (M6×50)

Flat washer

Spring washer

Nut (M6)

Flat washer

Spring washer

Drill six holes of 6 mm (1⁄4 in) in diameter.

R WARNING! NEVER mount

the transceiver main unit overhead. The weight of the unit is approximately 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.

CONNECTION AND INSTALLATION

■ Using the optional MB-108

The optional MB-108 mounting bracket is available for mounting the transceiver’s main unit. The MB-108 allows you to one-touch attachment/detachment capabilities.

CAUTION! WEAR GLOBES when installing the MB-108.

Edges of the MB-108 may be sharp and may easily cut your ﬁngers, hands, etc.

q Attach the mounting handles with the supplied hex

head bolts (M6×15), spring and flat washers as below.

w Drill 7 holes of 6–8 mm (1⁄4–5⁄16 in) in diameter,

using the template supplied with the MB-108.

e Attach the mounting base onto a ﬂat surface using

with the hex head bolts (M6×50), spring and flat washers, and nuts, supplied with the MB-108, as below.

r Mount the transceiver main unit (mounting handles

has attached)

onto the mounting base.

t Fix the main unit by locking 4 latches on the

mounting handles.

Hex head bolt (M6×50)

Spring washer

Flat washer

Mounting base

Nut (M6)

Hex head bolt (M6×15) Spring washer Flat washer

Mounting handle

CONNECTION AND INSTALLATION

Quick Reference

■ Using the optional MB-75

The optional MB-75 ﬂush mount is available for mounting the controller and speaker to a ﬂat surface such as an instrument panel.

CAUTION: KEEP the transceiver and handset or microphone at least 1 meter away from your ship’s magnetic navigation compass.

q Using the template on the page 67 for the remote

controller (RC-25GMDSS), and page 69 for the speaker (SP-24E), carefully cut a hole into the instrument panel (or wherever you plan to mount the controller or the speaker).

w Slide the controller or the speaker through the hole

as shown below.

e Attach the supplied 2 screws (M5×8) and spacers

on either side of the controller or speaker.

r Attach the clamps on either side of the controller

or speaker.

• Make sure that the clamps align parallel to the body.

t Tighten the end screws on the clamps (rotate

clockwise) so that the clamps press ﬁrmly against the inside of the instrument control panel.

y Tighten the locking nuts (rotate counterclockwise)

so that the controller or speaker is securely mounted in position as below.

u Connect the control cable then return the instru-

ment control panel to its original place.

✔ For your reference

When ﬂush mounting the controller and speaker side by side as below, screw and spacer attachment for the facing side will be impossible with the instructions above.

In this case, refer to the instructions at right for reference.

q Carefully cut the holes with at least 25 mm (1 in)

space between them into the instrument panel.

w Install the speaker as instructed above, ﬁrst. e Attach the screw and spacer on the speaker side

of the controller.

r Slide the controller through the hole as shown

below.

t Attach the screw and spacer on the other side of

the controller, then attach the clamps and follow steps t to u as above.

CONNECTION AND INSTALLATION

■ Transceiver dimensions

220 mm; 8

⁄

″

110 mm; 4

⁄32″

84.4 mm ; 3

⁄

″

110 mm; 4

⁄

″

110 mm; 4

⁄

″

367 mm; 14

⁄

″

260 mm; 10

⁄

″

95 mm

; 3

⁄32″

84.4 mm ; 3

⁄

″

CONNECTION AND INSTALLATION

D Fuse replacement

q Unscrew 4 cap-bolts from the top case.

• Use 6 mm (1⁄4″) allen wrench.

w Open the transceiver’s main unit, then disconnect

1 ﬂat and 2 coaxial cables as shown below.

e Unscrew 32 screws from the shield covers, then

open the covers.

r Replace the circuitry fuse as shown in the diagram

below.

• Use the supplied FGB 5 A fuse.

t Attach the shield covers, ﬂat cable, coaxial cables

and top case to their original position.

Fuse in DC-DC converter unit

Fuse in

PA unit

Flat cable

Coaxial cables

■ Fuse replacement

The transceiver has 2 fuses to protect internal circuitry. If the transceiver stops functioning, check the fuses below.

• DC-DC converter unit ……………………… FGB 5 A

• PA unit ……………………………………… FGB 5 A

CAUTION: DISCONNECT the DC power cable from the transceiver when changing a fuse.

CONNECTION AND INSTALLATION

■ Connector information

MICROPHONE Pin Pin name Description Speciﬁcation

1 MIC+ Audio input from the mic element. Input impedance : 2.4 kΩ

2 NC No connection.

3 AF1 AF output controlled with [VOL].

4 AF2 Ground for AF1.

5 PTT PTT switch input. When grounded, transmits.

6 GND Connected to the ground.

7 MIC– Coaxial ground for MIC+.

8AF– Coaxial ground for AF1 and AF2.

AF/MOD Pin Pin name Description Speciﬁcation

†

MOD+ Modulation input from an NBDP. Input impedance : 600 Ω

(J2B operation only) Input level : Approx. 0.77 V rms.

†

MOD– Coaxial ground for MOD+.

3* AF+ AF detector output for an NBDP. Output impedance: 600 Ω

(J2B operation only) Output level : 0.25–2.5 V rms

4* AF– Coaxial ground for AF+.

5 SEND Transmission control line for an Output level : –0.5 to 0.8 V

NBDP (transmits when grounded: Input level : Less than 20 mA J2B operation only).

6 NC No connection.

7 13.6 Outputs 13.6 V DC.

8 NC No connection.

9, 10 GND Ground terminals.

†

MOD+ Modulation input from an external Input impedance : 600 Ω

terminal unit for SSB. Input level : Approx. 0.77 V rms.

†

MOD– Coaxial ground for MOD+.

13* AF+ AF detector output for an external Output impedance: 600 Ω

terminal unit for SSB. Output level : 0.25–2.5 V rms

14* AF– Coaxial ground for AF+.

15 SEND Transmission control line for an Output level : –0.5 to 0.8 V

external unit for SSB (transmits Input level : Less than 20 mA when grounded).

Front panel view

*NOTE: Onput signal levels between pins 3/4 and 13/14, will inﬂuence each other because these pins are connected in paral-

lel. When a 2nd 600 Ω impedance device is additionally connected, adjust the 2nd device to the speciﬁed signal levels for the output (pins 3/4 and 13/14) signal levels of the connected 600 Ω impedance device (reception).

†

Input signal from pins 1/2 or 11/12 are acceptable only when transmitted with the SEND signal from 5 or 15, respectively.

1115

CONNECTION AND INSTALLATION

■ Connector information (continued)

NOTE: The IC-M801GMDSS supports IEC61162-1: 2000 data with FSI, SFI DSC and DSE sentences only.

NOTE: The IC-M801GMDSS supports IEC61162-1: 2000 GPS data with GGA, GNS, GLL and RMC sentences, and UTC of

position (excludes second unit or less), latitude and longitude information only.

REMOTE Pin Pin name Description Speciﬁcation

DATA-OUT (–)

Ground (not transceiver’s ground) for DATA-OUT (+) terminal.

DATA-OUT (+)

IEC61162-1: 2000 data output. Output level : 40 mA max. (as a talker)

DATA-IN (+)

IEC61162-1: 2000 data input. Input level : Less than 2 mA (when 2 V

applied; as a listener)

DATA-IN (–)

Ground (not transceiver’s ground) for DATA-IN (+) terminal.

5 GND Connected to the ground.

6 NC No connection.

7 NC No connection.

8 NC No connection.

9 NC No connection.

Front panel view

RCA Pin name Description Speciﬁcation

GPS IN (+) GPS data input in IEC61162-1: 2000 format. Input level : Less than 2 mA (when 2 V ap-

plied; as a listener)

GPS IN (–) Ground (not transceiver’s ground) for GPS-

IN (+) terminal.

PRINTER Pin Pin name Description

1 STROBE Outputs a strobe pulse after data output.

2–9DATA1–8 Outputs 8-bit parallel data.

10 ACKNLG

Input port for the connected printer. “Low” pulse signal is applied from the printer during the printer accepts data input.

Input port for the connected printer.

11 BUSY “High” level signal is applied from the printer during the printer cannot accept data

input, such as when off line.

12–14 NC No connection.

15 ERROR

Input port for the connected printer. The printer output becomes “Low” when an printer error, such as no paper, occurs.

16, 17 NC No connection.

18–25 GND Ground terminals.

Front panel view

13..........................1

25.......................14

GPS IN (+)

RCA

GPS IN (–)

SPECIFICATIONS

• General

• Frequency coverage : (Unit: MHz) Receive 0.5–29.9999 Transmit 1.6–2.9999 4.0–4.9999

6.0–6.9999 8.0–8.9999

12.0–13.9999 16.0–17.9999

18.0–19.9999 22.0–22.9999

25.0–27.5000

• DSC channels : 2187.5 kHz, 4207.5 kHz,

6312.0 kHz, 8414.5 kHz,

12577.0 kHz, 16804.5 kHz

• Type of emission :

Transceiver

J3E (USB/LSB*), H3E,* J2B (AFSK), F1B

(FSK; receive only), A1A* (CW)

DSC receiver F1B

*Receive only

• No. of memory Ch. : 1195 channels (max.)

160 user programmable, 249 ITU SSB duplex, 124 ITU SSB simplex and 662 ITU FSK duplex channels

• Antenna connector : SO-239×2 (50 Ω)

• Usable temp. range : –15˚C to +55˚C

• Frequency stability : ±10 Hz

(Approx. 5 min. after [DC ISOLATE] is turned ON.)

• Power supply : 21.6–31.2 V DC

(ﬂoating ground)

• Current drain :

Transmit at max. power 30 A Receive at max. audio Less than 3.0 A

• Dimensions

(projections not incl.):

Main unit 367(W)×95(H)×260(D) mm Controller

(RC-25GMDSS)

220(W)×110(H)×84.4(D) mm

Speaker

(SP-24E)

110(W)×110(H)×84.4(D) mm

• Weight (approx.) :

Main unit 8.5 kg Controller

(RC-25GMDSS)

570 g

Speaker

(SP-24E)

370 g

•

CONTROLLER connector

: 8-pin connector

• GPS connector : RCA (IEC61162-1: 2000)

• REMOTE connector : D-sub 9-pin (IEC61162-1: 2000)

• AF/MOD connector : D-sub 15-pin

• PRINTER connector : D-sub 25-pin

• Transmitter

• Output power :

1.6–3.9999 MHz 85 W p-p

4.0–27.5000 MHz 125 W p–p

• Spurious emission : 43 dB below peak output power

• Carrier suppression : 40dB below peak output power

• Unwanted sideband : 55 dB below peak output power

suppression

(w/1 kHz AF input; at max power)

• Mic. connector : 8-pin connector (2.4 kΩ)

• Receiver

• Sensitivity :

Transceiver

J3E, A1A 30 dBµV emf (0.5–1.5999 MHz)

(20 dB SINAD) 13 dBµV emf (1.6–1.7999 MHz)

8 dBµV emf (1.8–29.9999 MHz)

J2B, F1B 13 dBµV emf (1.6–1.7999 MHz)

(20 dB SINAD) 8 dBµV emf (1.8–29.9999 MHz)

H3E 44 dBµV emf (0.5–1.5999 MHz)

(20 dB SINAD) 30 dBµV emf (1.6–1.7999 MHz)

24 dBµV emf (1.8–3.9999 MHz)

DSC receiver

(J2B) 0 dBµV emf

(all channels)

• Spurious response rejection ratio: Transceiver More than 70 dB

(0.5–29.9999 MHz)

DSC receiver More than 60 dB

(1st image)

More than 50 dB

(except 1st image)

• AF output power : More than 4.0 W at 10% distortion

(at 24 V DC)

with a 4 Ω load

•

CLARITY variable range

: ±150 Hz

• Headphone connector : 3-conductor 3.5 (d) mm (

⁄8″)

• SP connector : 2-conductor 3.5 (d) mm (

⁄8″)/4 Ω

OPTIONS

Quick Reference

AT-141

HF AUTOMATIC ANTENNA TUNER

Matches the transceiver to a long wire antenna with a minimum of insertion loss.

RC-25GMDSS

REMOTE CONTROLLER

Same as that supplied remote with the transceiver. Mounting bracket, MB-81, is supplied with the controller.

SP-24E

EXTERNAL SPEAKER

Same as that supplied with the transceiver. Mounting bracket, MB-82 is supplied with the speaker. Max. AF input/impedance: 5 W/4 Ω

MB-75

FLUSH MOUNT KIT

For mounting the remote controller (RC25GMDSS) or the SP-24E to a panel.

HS-98

HANDSET

Same as that supplied with the ICM801GMDSS.

OPC-1465

SHIELDED CONTROL CABLE

Shielded control cable protects the transceiver from RF feedback and extends the separation between AT-141 and transceiver up to 10 m .

OPC-1466

SEPARATION CABLE

Same as that supplied with the transceiver. Cable length: 5 m

OPC-1575

SEPARATION CABLE

For extended remote controller installation. Cable length: 10 m

OPC-1610

SPEAKER EXTENSION CABLE

For extended speaker installation. Cable length: 5 m

HM-135

HAND MICROPHONE

Equipped with channel up/down and user-programmable keys.

MB-108

MOUNTING BRACKET

One-touch bracket. Transceiver main unit easily attached or removed.

Quick Reference

TEMPLATE

92 mm; 35⁄8″

110 mm; 411⁄32″

204 mm; 8

⁄32″

220 mm; 8

⁄32″

4–R11

■ Remote controller (RC-25GMDSS)

TEMPLATE

92 mm; 35⁄8″

110 mm; 411⁄32″

4–R11

110 mm; 4

⁄32″

92 mm; 3

⁄8″

■ Speaker (SP-24E)

ANTENNA AND GROUNDING CONSIDERATIONS

Quick Reference

ANTENNAS & TUNERS

If your Icom SSB transceiver is going aboard a sailboat, you may either use an insulated backstay an insulated sidestay, or a non-resonant white ﬁber glass whip antenna off the stern to make up your antenna system. Your best range will be from an insulated backstay because of the long length of the antenna “radiator” which is that portion within the top and bottom insulators. Have your rigger put the top insulator about at least 3 feet down from the tip of the mast. Have your rigger install the bottom insulator at about eye-level when you’re standing back aft. (This length between insulators should not exceed 120′ or be less than 23′.) If you decide to go for the non-resonant whip antenna, the antenna usually goes at the extreme stern and mounts either vertically or raked back at about a 45-degree angle.

These non-resonant antennas may be tuned by the ICOM automatic antenna tuner that matches the Icom SSB transceiver. The tuner goes back aft, in the lazarette, or as close to the antenna as possible. It is completely weather-protected and can easily take the punishment of being aft and below deck where you’re probably also going to store wet life preservers, foul weather gear and the like. The tuner interconnects with the Icom SSB. Full details are in the tuner instruction (installation) manual. We suggest you use “GTO-15” high voltage lead-in wire from the single wire output of the tuner to your insulated backstay or to your nonresonant whip. This high voltage wire won’t break down in wet weather or sunlight. Use stainless steel hose clamps to attach the wire to the insulated backstay. If you decide to use a non-resonant whip, attach the single wire with a lug to the feedpoint at the base of the whip.

More about the importance of grounding in a moment.

For those of you with a powerboat, a whip antenna approximately 16 to 20 feet long is what you’ll be using with your new Icom SSB. The most common set-up consists of the white fiber glass non-resonant whip antenna that is automatically tuned with the ICOM automatic antenna tuner. Similar to sailboat installations, the tuner is hidden out of the way in the ﬂying bridge area or below deck near the base of the whip. GTO-15 wire interconnects the whip to the automatic tuner. The tuner is fed with coax (RG 213) and a control line from the back of the Icom SSB wherever you plan to hide the auto-tuner. Remember, the ICOM automatic tuner is fully automatic, so you can put it completely out of sight!

We suggest you check with the dealer that sold you your transceiver to purchase the ICOM automatic tuner as well as a resonant or non-resonant whip antenna assembly. Dealers that sell ICOM equipment usually have these accessories on hand.

THE IMPORTANCE OF GROUNDING

Please read this! If you are looking for “super range” with your new Icom SSB transceiver, we have some tricks that will give you the same kind of range as globe-circling cruise ships, super tankers, solo sailors, the Navy and the Coast Guard. Surface area to the sea water and the use of copper foil exclusively throughout your RF ground system is the combination that gives you commercial-type “super range.” The sea water acts like a diving board or side of a pool for a diver and a swimmer— it gives your signal a solid surface to

push off from. This is technically called a “counterpoise”, and it’s the absolute necessary “other-half” of your antenna system that must be achieved for your overall single sideband system to work well.

It’s not that hard to develop your own sideband RF ground system in just about a day’s time, and you may even ﬁnd that most of the RF ground system is already installed so you have little to do but to tie everything together with copper foil. Read on, please, and let us show you how easy it can be.

NON-TECHNICALLY SPEAKING

If you plan to have a technician or a technical friend install your sideband system, have him skip this part and begin reading at “Antenna Ground Principles, Technically Speaking.” If you plan to do the installation yourself, and this is the ﬁrst one you’ve done, read on!

The water that your boat sits in is the ultimate ground counterpoise. There’s none better. Commercial AM broadcast stations on the coast usually put their giant antenna system in the mud ﬂats of a local bay for good range.

Some boat suppliers put ground foil and ground screen in the cabin overhead. This is true on expensive powerboats, and is sometimes found in a few sailboats. While this type of overhead RF ground system is better than nothing, it still lacks the capability of coupling with the ocean or lake as the ultimate water ground system. A far better RF ground system would be the following:

•9.3 sq. meter; 100 sq. ft. area of foil below water line

• Metal water tanks

• Lead keel

• Foil radials

• Interconnected through-hull

The whole idea is surface area— and this is why a keel bolt, underwater tanks, through-hulls, and anything else ﬂat and next to the water does such a good job. Now we know your next question, “But doesn’t a good ground actually have to be in contact with the water?” Not at all! At radio frequencies (RF), your underwater ground counterpoise sees the water in a capacitive way, which gives just as good a ground effect as if it were actually touching the water!

Now here’s another very important point, no round wires for RF ground! Even if you use welding wire the size of your thumb, you cannot achieve a good ground counterpoise with round wire. In our “Technically Speaking” section, we’ll tell you why, but, in non-technical terms, round wires tend to cancel out at radio frequencies, and they look invisible as a ground counterpoise interconnect. This is why copper foil must be used between the chassis of your transceiver to your ship’s RF ground, as the chassis of the automatic an- tenna tuner to ship’s RF ground.

Your better marine electronic stores that sell ICOM equipment will also sell three-inch wide, super-thin, copper foil for grounding. In a pinch, you can use one-inch wide copper plumber’s tape. Three-inch is better. Note: A three inch strip mounted three inches away from another three inch strip of copper foil looks like a nine inch strip to a radio wave.

It’s going to take you about a day to work this foil below decks and below the water line picking up anything and

ANTENNA AND GROUNDING CONSIDERATIONS

everything of ground potential. If you can get at your keel bolt, or tap a screw into the keel, your grounding is done. Lead incapsulated keels are the ultimate in grounds, and you may need nothing further.

In powerboats, since there's no keel, you’re going to need to come up with at least 100 square feet of RF ground surface below the water line. This means you must pick up as many ground potentials below the water line as possible. We usually use a stainless steel hose clamp to grab each underwater metal source.

Now let’s take a look at grounding from a slightly more technical point of view. Don’t worry, we won’t get over-technical, and it’s easy to read and understand. If you’re letting a technical friend of technician put in your equipment, make sure they read over this section several times. The facts here are based on hundreds of hours of doing and undoing, different types of ground systems. In all cases, following these techniques will give you the results that you want and that’s long range and the loudest signal on the band.

ANTENNA GROUND PRINCIPLES, TECHNICALLY SPEAKING

The marine antenna system for low, medium, and high frequency applications will utilize both the seawater as well as radiator for its entire operation. Like two kids on a teeter-totter, the system works well if there is a balance between the antenna radiator and the seawater ground. This balanced antenna system may electrically be compared to a dipole antenna system— one-half wavelength long on the frequency band of operation with voltage and current loops equally distributed throughout the half-wave length system. In marine applications where a vertical antenna is used, this system is more precisely referred to as a Hertz antenna set-up. The white fiber glass whip is tuned to an electrical one-quarter wavelength and the ground system will make up the other one-quarter wavelength. We technically call the RF ground system a “counterpoise,” and the antenna the “radiator.”

If either a one-quarter wavelength antenna or ground system is missing or inadequate, radio reception and transmission range will be severely reduced. How good was your car radio reception when someone broke off your whip antenna? The same degradation of range also takes place when there is little or no RF ground system for antenna to work against in a marine installation.

Imagine a swimmer making a flip turn, but not having the side of the pool to push off from. The same thing happens with radio wave transmissions on single sideband. The most powerful antenna will not radiate a signal if it has not counterpoise to push off the signal from.

In technical terms, the less RF ground, the higher the radiation resistance of the antenna system. This radiation resistance will lead to substantial power loss and single sideband equipment will not only perform poorly, but also get quite hot in the transmitter section. An inadequate single sideband RF ground will also lead to “hot mikes” where the operator actually receives a radio frequency burn each time the mike is held next to his mouth. Poor RF grounding will also lead to erratic movement of analogue dial instruments, bizarre behavior of automatic pilots while transmitting on the sideband

set, and may even cause burn-outs of tiny integrated circuits in companion marine electronic gear aboard. ISOLATING YOUR RF GROUNDING SYSTEM FROM YOUR DC GROUNDING SYSTEM WILL PREVENT THESE UNWANTED OCCURRENCES.

SURFACE AREA

For marine SSB radios a good radio frequency ground system will consist of a minimum of 100 square feet of metal below the waterline. Now we know you’re going to jump out of your chairs when you read this, but don’t be overwhelmed. There are plenty of underwater metals that we might attach to in order to obtain this amount of counterpoise below the waterline. Lead keels incapsulated within fiber glass will make excellent surface area grounds in sailboat applications. The tough part will be getting to the lead keel or the exposed keel bolt.

In other marine installations, stainless steel tanks, copper hydraulic lines, and through-hulls, will help make up the RF ground counterpoise system.

Boat manufacturers have the capabilities of adding a terriﬁc RF ground system when the hull is being laid up. Lightweight copper screen is one of the best ways to provide a good surface area ground. Copper screen could be laminated inside the ﬁber glass layers as the hull is under construction. Thin sheets of copper foil could also be used in the manufacturing process of the hull. Even the conducting mesh that holds together cement hulls can be used quite nicely as a ground counterpoise system.

Copper foil and grounding screen is available from most marine electronic distributors as well as marine electronic dealers. Thickness of the screen and foil is not important, the most common foil is generally one to four mills thick and comes in three-inch wide rolls of just about any length you want. Copper window screen (if you can find it) is usable, thickness is not important. Radio frequency energy travels on the outside of this conducting surface called skin effect, eliminating the need for thick grounding materials.

Since grounding foil and screen is relatively expensive, most boat builders will simply leave out this grounding process and expect the customer to provide their own RF ground once the boat is ﬁnished. This is a shame— it’s so easy to build in when the hull is under construction, and far more difﬁcult to add after the vessel is fully completed.

The copper foil and screen does not actually need to contact seawater in order to create the ground system. Radio frequency energy passes through fibreglass, so an incapsulated ground system works just as well as one that is actually exposed to the seawater. Incapsulated lead keels with a halfinch of resin also work well. Any RF ground system that is capacitively coupled to the seawater is enhanced by the seawater itself.

Developing the ground system for radio frequency applications (as opposed to DC grounding systems) requires that all ground connections be interlaced using copper foil. Round ground wires are out! Wires actually look like inductive trapcircuits at certain radio frequencies, and will appear invisible as an effective way of coupling your set to your ground system. That’s right, copper foil must be run from below the wa-

ANTENNA AND GROUNDING CONSIDERATIONS

Quick Reference

terline ground system and attached directly to each piece of low and high frequency radio gear.

While this may also seem to be an insurmountable problem in running foil, rather than wire, foil handles quite nicely, even in tight places. The foil is easily soldered to the below waterline ground system, and then routed up the side of the hull into the area of the NAV station. It may be glassed into the hull, painted over, glued in, or even left resting on the side of the hull. The foil may be bent in order to accomplish a 90-degree

turn. If the foil must absolutely pass through a small hole, it may be rolled up in a not-so-tight conﬁguration and squeezed through the oriﬁce. Avoid a concentric type, for that type tends to cancel oscillating radio frequencies. Flat is best.

There are several sticky marine compounds that will allow the foil to adhere to the underside of a hatch, or to the side of a hull. Almost anything will work, and there is little danger of any substantial amounts of voltage developing on your ground foil run. The ground foil and your complete RF ground system, which run inside the hull, also will not substantially change your corrosion exposure to the seawater. Galvanic corrosion problems occur when dissimilar metals are immersed in seawater. The ground system is not actually immersed, its coupling is only capacitive.

Electrolysis is another form of corrosion where stray currents may begin to eat up underwater metals. Good wiring techniques for your 12-volt system independent of your RF ground system will eliminate electrolysis.

Now let’s get back to ﬁnding a spot to terminate that threeinch wide copper foil that emanates from the below waterline ground system. Most manufacturers of Loran weather fax and marine single sideband sets don’t provide an easy way of adding ground foil to the stern end of their electronics! The best method is to run the foil up to the back of the equipment and use existing sheet metal screws to make a ﬁrm connection. Where a ground post stud with nuts and a washer are provided, all the better— run the foil up to the stud, double it back on itself several times for strength, punch a hole in it, and then make the connection. Never negate all your hard work of running the foil by using a small jumper wire to interconnect the foil to the radio set-up. You will be putting a “weak link” in your ground system at radio frequencies.

We usually accordion up the excess foil in back of the equipment so that we might remove the equipment for servicing with the foil attached. If you put the bends in the right spot, the foil will resume its natural collapsed state when the equipment is put back in place. Watch out for the sharp corners on the ground foil, they are capable of piercing through the plastic protective covering on electrical wires. Make sure that red and black voltage carrying wires are not allowed to rub up against the side of the ground foil.

We usually ground everything with foil at the navigation station. This would include the casing of the wind and speed equipment, pilot control box, GPS, sideband, radar, VHF, and just about everything else that lights up. The more grounding you provide for your central electronics, the less problems you will have with stray RF.

The ground foil must also run to remote tuners. This includes the ICOM single sideband tuner that’s usually several feet away from the equipment. These tuners may be all the way back aft, adding another dimension to your ground foil run.

It’s best to run the foil from the RF ground source directly to your tuner, rather than stringing everything out in series like Christmas tree lights. Now picture one ground foil run from the keel bolt to the electronics, and a second ground foil run from the keel bolt back aft to the sideband tuner and your stern-mounted Loran whip. These tuner ground circuits are mandatory for any type of reliable operation. If you try to run an ICOM sideband set with a remote tuner that is undergrounded, you stand the chance of not only burning up your equipment, but also damaging other electronics onboard with stray RF. If it’s not easy to run ground foil from your central below the waterline ground source back aft, then try to ﬁg- ure out another way to do it. It has to be done!

You can also pick up additional ground counterpoise surface area by adding substantial metals along the way in your copper foil run. Stainless steel hose clamps make it easy to pick up through-hull bronze ﬁttings, water tanks, copper hydraulic lines, and anything else that may give you some additional underwater surface area.

Mariners with sailboats with poured incapsulated lead keels as well as metal hull vessels have the easiest time in obtaining a good ground counterpoise. If the keel is visible, a second nut on the exposed thread will anchor on the ground foil. We usually seal this connection to prevent deterioration from the bilge water. It may also be recommended by local experts to tie in the aluminum mast to this close proximity keel bolt for lightning protection. The run from the mast to the keel bolt must be smooth, direct, and without sharp turns in order to pass lightning energy effectively into the underwater lead. Again, consult local lightning experts.

Steel-hulled vessels are easily attached to with foil by scraping away any protective coating from the hull, and making a low resistant good surface area contact. Again, seal this connection well. Non-metal hull or keel boats require yards and yards of foil to be run below the waterline, anywhere you can, and picking up any other large below the waterline tanks and tubes.

SUMMARY

If you follow these steps, you will have an outstanding single sideband signal that can be heard around the world. The difference between a good and bad ground is easily noticed on transmission as well as reception. Since your ground counterpoise is actually a part of your complete antenna system, pay just as much attention to RF grounding as you did to putting up that white ﬁber glass whip or installing to your insulated backstay.

MEMO

Quick Reference

Printed on recycled paper with soy ink.

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

Icom America Inc.

<Corporate Headquarters> 2380 116th Avenue NE, Bellevue, WA 98004, U.S.A. Phone: +1 (425) 454-8155 Fax: +1 (425) 454-1509 URL: http://www.icomamerica.com E-mail: sales@icomamerica.com <Customer service> Phone: (425) 454-7619

Icom (Europe) GmbH

Communication Equipment Himmelgeister Str. 100, D-40225 Dusseldorf, Germany Phone: +49 (0211) 346047 Fax: +49 (0211) 333639 URL: http://www.icomeurope.com E-mail: info@icomeurope.com

Icom Canada

Glenwood Centre #1150-6165 Highway 17, Delta, B.C., V4K 5B8, Canada Phone: +1 (604) 952-4266 Fax: +1 (604) 952-0090 URL: http://www.icomcanada.com E-mail: info@icomcanada.com

Icom Spain S.L.

Ctra. Rubi, No. 88 “Ediﬁcio Can Castanyer” 08190, Sant Cugat del Valles, Barcelona, Spain Phone: +34 (93) 590 26 70 Fax: +34 (93) 589 04 46 URL: http://www.icomspain.com E-mail: icom@icomspain.com

Icom (Australia) Pty. Ltd.

Unit 1/103 Garden Road, Clayton Victoria, 3168, Australia Phone: +61 (03) 9549 7500 Fax: +61 (03) 9549-7505 URL: http://www.icom.net.au E-mail: sales@icom.net.au

Icom (UK) Ltd.

Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K. Phone: +44 (01227) 741741 Fax: +44 (01227) 741742 URL: http://www.icomuk.co.uk E-mail: info@icomuk.co.uk

Icom New Zealand

146A Harris Road, East Tamaki, Auckland, New Zealand Phone: +64 (09) 274-4062 Fax: +64 (09) 274-4708 URL: http://www.icom.co.nz E-mail: inquiries@icom.co.nz

Icom France s.a.s.

Zac de la Plaine, 1 Rue Brindejonc des Moulinais, BP 45804, 31505 Toulouse Cedex 5, France Phone: +33 (5) 61 36 03 03 Fax: +33 (5) 61 36 03 00 URL: http://www.icom-france.com E-mail: icom@icom-france.com

Asia Icom Inc.

6F No. 68, Sec. 1 Cheng-Teh Road, Taipei, Taiwan, R.O.C. Phone: +886 (02) 2559 1899 Fax: +886 (02) 2559 1874 URL: http://www.asia-icom.com E-mail: sales@asia-icom.com

Icom Polska

Sopot, 3 maja 54, Poland Phone: +48 (58) 550 7135 Fax: +48 (58) 551 0484 URL: http://www.icompolska.com.pl E-mail: icompolska@icompolska.com.pl

Icom IC-M801GMDSS User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual