We want to take a couple of moments of your time to structions for the IC-M801GMDSS. thank you for making the IC-M801GMDSS your radio of choice, and hope you agree with Icom’s philosophy of EXPLICIT DEFINITIONS “technology first.”...
IN CASE OF EMERGENCY When your ship requires assistance, contact other ships and the Coast Guard by sending a distress call using dig- ital selective calling on an emergency frequency. When immediate help is needed When potential problems exist q Push and hold [DISTRESS] for 5 sec. until the q Push [DSC] to select DSC watch mode, if neces- short beeps become one long beep, to send the sary.
TABLE OF CONTENTS FOREWORD...............i 10 MEMORY OPERATION ........42 I Memory description ........42 IMPORTANT ............. i I Memory writing ..........42 EXPLICIT DEFINITIONS .......... i I Memory reading/transmitting/deleting .... 42 PRECAUTIONS ............i 11 DSC MENU OPERATION ......43–46 IN CASE OF EMERGENCY ........ii I General ............
OPERATING RULES AND GUIDELINES Before transmitting, monitor the channel you wish to use so as to avoid interrupting transmissions al- ready in progress. • CALL PROCEDURE • LOGS Calls must be properly identified and the time limit q All distress, emergency and safety calls must be must be respected.
PANEL DESCRIPTION I Controller (RC-25GMDSS) Function display (pgs. 6, 7) DISTRESS q DISTRESS SWITCH [DISTRESS] (p. 18) i RX/CLARITY SWITCH [RX CLAR ➥ After pushing [F], turns the clarity function ON Push and hold for 5 sec. (approx.) to make a dis- tress call.
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PANEL DESCRIPTION ➥ Inputs numeral “8” for channel number !2 FREQUENCY/CHANNEL SWITCH [FREQ/CH] ➥ Selects indication type: (p. 8) input, etc. ➥ Inputs “8,” “T,” “U,” “V,” “t,” “u” or “v” for When channel comment indication is ON; channel comment input. switches channel comment indication ON and ➥...
PANEL DESCRIPTION I Main unit q GROUND TERMINAL i MODEM CONNECTOR [AF/MOD] (pgs. 55, 65) IMPORTANT! Connects a ship’s ground. See Connects to an NBDP (Narrow Band Direct Print- page 56 for details. ing) or FAX system via a D-sub 9-pin cable. w DC POWER TERMINALS (pgs.
PANEL DESCRIPTION I Handset (HS-98) Cradle Handset q SPEAKER SWITCH w HANDSET CONNECTOR Toggle the connected external speaker output ON Connects to [MIC] connector on the remote con- and OFF when pick the handset up. troller. (p. 54) • When the switch is set to “ ”...
PANEL DESCRIPTION I LCD screen The IC-M801GMDSS has 2 indication types, one is channel name indication and the other is frequency in- dication. These indication types can be switched with a push of a button, depending on set mode’s setting.
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PANEL DESCRIPTION q RECEIVE INDICATOR !1 S/ANTENNA CURRENT INDICATOR “RX” appears when signals are received or the Shows relative driving antenna current levels dur- squelch is open. ing transmit and receiving signal strength during re- ceive. w TUNE INDICATOR !2 NOISE BLANKER INDICATOR (p. 11) “TUNE”...
SELECTING A CHANNEL/FREQUENCY I Selecting a channel The transceiver has 160 user channels and ITU chan- nels. However, the number of user channels can be optionally restricted. D D Display selection FREQUENCY indication CHANNEL indication J 3 E S I M P J 3 E S I M P C H - - - G P S - - -...
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SELECTING A CHANNEL/FREQUENCY D D Using the keypad [EXAMPLE]: Selecting channel 158 Direct channel selection via the keypad is available J 3 E for quick channel selection. q Enter the desired channel number via the keypad. • Pushing [CE] clears input digits and retrieves the chan- C H - - - G P S - - - L a t 4 5 5 9 ' N nel.
RECEIVE AND TRANSMIT I Basic voice transmit and receive q Check the following in advance. w Rotate [GRP] and [CH] to select the desired chan- ➥ Handset or microphone is connected. nel to be received. ➥ No “SQL” indication. • When receiving a signal, the S-meter shows the signal strength.
RECEIVE AND TRANSMIT I Functions for receive D D Squelch function The squelch function detects signals with voice com- ponents and squelches (mutes) unwanted signals such as unmodulated beat signals. This provides quiet stand-by. When you need to receive weak signals, the squelch should be turned OFF.
Rotate [CH] to improve the audio readability. • Adjustable between ±150 Hz in 10 Hz steps. D D 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 par- ticular frequency band may be improved depending on your antenna element length.
CHANNEL NAME PROGRAMMING Up to 8-character channel names can be assigned for NOTE: The display type must be set to “CH- each user and ITU channel. This may be helpful for in- NAME” to display/program the channel names in ini- dicating the frequency usage, ship name, etc.
FREQUENCY PROGRAMMING I Frequency selection D D Using the channel selector q Select a channel which is programmed near the e Rotate [GRP] to select the digit for tuning. • Under-bar shows the selected digit. frequency you want to receive. w Push [RX ] to select the frequency selection CLAR...
FREQUENCY PROGRAMMING I Programming a frequency D D Receive frequency r Push [MODE q Select the desired channel to be programmed. ] several times to select the de- sired operating mode (type of emission). • Channel 1 to 160 (maximum) are programmable. w Push [RX ] to select the frequency selection CLAR...
DSC PREPARATION I MMSI code programming The 9-digit MMSI (Maritime Mobile Service Identity: This operation is not available when the MMSI code DSC self ID) code can be programmed. has been programmed by your dealer. The code re- programming cannot be performed. This code is dis- played during DSC watch mode.
DSC PREPARATION I Position and time programming When no position and the UTC IMPORTANT! (Universal Time Coordi- time data in NMEA0183 ver. 3.01 format, such Manually programmed position and time data will be nated) as from a GPS receiver, etc., is applied to [GPS] con- held for 23.5 hours only, and “?”...
CALL PROCEDURE I 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. • Simple distress call DSC WATCH screen Push and hold DISTRESS screen [DISTRESS] DISTRESS...
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CALL PROCEDURE DISTRESS CALLING screen While waiting for the acknowledgement After 5 sec., starts distress call. < W a i t f o r A C K > J 3 E 8 . 4 1 4 . 5 F 1 B 3 4 5 6 .
CALL PROCEDURE I Individual call When you use DSC for general selective calling, per- form as follows. DSC WATCH screen 1st telecommand selection Rotate A C K * * * * * * I n d i v i d u a l * * * * * * - - - 1 s t t e l e c o m m a n d - - - - Ç...
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W r i t e - M e n u ✔ INFORMATION Push and hold Push and hold The IC-M801GMDSS will not transmit the DSC call (except for 1 sec. for 1 sec. emergency call) even [CALL] is pushed and held when the set TX memory calling frequency is in busy.
CALL PROCEDURE I Group call When you use DSC for calling the desired ship’s group, use “Group” menu. DSC WATCH screen 1st telecommand selection Rotate * * * * * * * * G r o u p * * * * * * * * * A C K - - - 1 s t t e l e c o m m a n d - - - - Ç...
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* * * * * * * * * G r o u p * * * * * * * * The IC-M801GMDSS has DSC TX memory. You can store of- - - - - - - - - - C a l l - - - - - - - - - ten used DSC calling conditions for quick and simple re-call.
CALL PROCEDURE I Geographical call Use the geographical call when urgency or safety mes- sage announcement is necessary to the ships in the particular area. DSC WATCH screen Area selection A C K Rotate * * * * * G e o g r a p h i c a l * * * * * - - - - - - - - - A r e a - - - - - - - - - Ç...
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CALL PROCEDURE Call frequency selection ✔ For your information 1— Area input * * * * * G e o g r a p h i c a l * * * * * Rotate When using the ‘Geographical’ call with “Area” selection, - - - - C a l l f r e q u e n c y - - - - your original position is always the upper left hand corner in Ç...
CALL PROCEDURE I Semi/Auto (telephone) call The frequency for telephone call use are specified by a coast station, therefore, two calls/acknowledgements are usually necessary before making a telephone call. DSC WATCH screen Number selection A C K Rotate * * * * * * S e m i / A u t o * * * * * * * - - - - - - - - N u m b e r - - - - - - - - Ç...
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CALL PROCEDURE Position & time screen When the connection is succeeded Rotate * * * * * * S e m i / A u t o * * * * * * * S e m i / A u t o - - - P o s i t i o n &...
CALL PROCEDURE I 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. DSC WATCH screen Confirmation screen A C K * * * * * P o s i t i o n R E Q * * * * * - - - - - - - - - C a l l - - - - - - - - - T o : I C - M 8 0 1 _ 1...
CALL PROCEDURE I Test call Testing on the exclusive DSC distress and safety call- Normally the test call would require no further commu- ing frequencies should be avoided nications between the two stations involved. (such as 2187.5 kHz) 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.
WHEN RECEIVING A CALL I To receive a DSC call The independent built-in DSC receiver circuit in the IC- However, “routine” and “group” calls on the other fre- M801GMDSS scans all distress/safety frequencies, quencies are received via the transceiver’s receiver therefore, the “distress,”...
WHEN RECEIVING A CALL I Received information When receiving a DSC call, the received format spec- ifier and its contents are memorized into the RX mem- ory. 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 mem- orized.
WHEN RECEIVING A CALL I Distress call When a distress call is received D Distress relay call operation * * * * * * * * * * * * * * * * * * * * * * * * Distress call reception should stop after one D i s t r e s s sequence since the coast station should...
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WHEN RECEIVING A CALL Position & UTC time confirmation/setting Address ID selection Rotate * * * * * D i s t r e s s R L Y * * * * * Rotate * * * * * D i s t r e s s R L Y * * * * * - - - P o s i t i o n &...
WHEN RECEIVING A CALL I Distress relay call D Distress relay acknowledgement call When a distress relay call is received operation * * * * * * * * * * * * * * * * * * * * * * * * D i s t r e s s R L Y DSC menu 0 0 1 2 3 4 5 6 7...
WHEN RECEIVING A CALL I Semi/Auto (telephone) call Making disconnection call When a semi/auto call is received S e m i / A u t o E N D S e m i / A u t o < C a l l i n g > <...
L o n 1 3 5 3 4 ' E 1 2 : 3 4 E x i t I Geographical area call NOTE: The IC-M801GMDSS will not function for the geographical call when your position is out of the specified area. When a geographical call is received...
WHEN RECEIVING A CALL I Position request call When a position request is received Position & UTC time confirmation Rotate * * * * * P o s i t i o n A C K * * * * * - - - P o s i t i o n &...
WHEN RECEIVING A CALL I Individual call When receiving an Individual call, beeps may sound (or the emergency alarm depending on the category) and the display below appears. When an individual call is received New traffic frequency selection Rotate * * * * I n d i v i d u a l A C K * * * * - - T r a f f i c f r e q u e n c y - - - * * * * * * * * * * * * * * * * * * * * * * * * Ç...
WHEN RECEIVING A CALL D Auto ACK setting “Unable” reason selection Rotate * * * * I n d i v i d u a l A C K * * * * DSC WATCH screen - - - - - - - - C o m p l y - - - - - - - - Ç...
MEMORY OPERATION I Memory description The IC-M801GMDSS has several kinds of memories 10 DSC transmission memory channels allow you to as follows: set often used format specifiers and contents such as for routine calls, group calls, etc. • Address and group ID code memories (p. 43) •...
DSC MENU OPERATION I General Up to 100 ID codes with frequency and name can be In addition, the following settings/operation are avail- programmed in MENU mode for easy recall during able in DSC setup menu. DSC call setting. • Manual position/time setting (p. 17) •...
DSC MENU OPERATION I Frequency input A total of 50 frequency pairs can be programmed as NOTE: Up to 6 pairs of frequencies only can be as- “Call frequency,” “Traffic frequency” or “Scan fre- signed as a scan frequency. They are scanned dur- quency.”...
] to return to DSC watch mode, or push [FREQ/CH] to return to the select screen. I Self testing According to regulations, the IC-M801GMDSS has a self testing capability to check the internal AFSK en- coder and decoder circuits without signal transmission via the transceiver.
DSC MENU OPERATION I Memory reading/deleting q During setup select menu indication, rotate [CH] to e Operate as follows: ➥ When reading the memory contents only; select the desired memory item then push [ENT]. • Push [DSC] to select DSC watch mode. •...
SET MODE I Quick set mode D D Entering quick set mode [MODE q Push [F] then [MODE ] 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.
SET MODE I Initial set mode Initial set mode operation is used for programming in- NOTE: Selection of some of the set mode items de- frequently changed values, conditions or functions. scribed here are not available on some transceiver versions. D D Entering set mode q Turn the power OFF, if the transceiver is powered w While pushing [MODE...
SET MODE D D Initial set mode items (continued) Scan speed This item adjusts the scan speed (rate at which chan- * * * S E T M O D E * * * nels are searched). The scan speed can be set from 1 to 10 with “1”...
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SET MODE D D Initial set mode items (continued) FSK polarity Normal and reverse polarities are available for FSK * * * S E T M O D E * * * operations. This item allows you to select one of these polarities.
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SET MODE D D Initial set mode items (continued) Modulation input/output selection This item selects the input/output terminal for signals * * * S E T M O D E * * * to/from an external unit, such as a TNC (Terminal Node Controller).
SET MODE D D Initial set mode items (continued) DSC data out This item selects the DSC and DSE data output to the * * * S E T M O D E * * * connected external unit, such as PC, plotter, to [RE- MOTE] when receiving a DSC call.
CONNECTION AND INSTALLATION I Supplied accessories The following accessories are supplied with IC- M801GMDSS. q Handset …………………………………………… 1 !0 Hex head bolts (M6×15) ………………………… 6 w External speaker !1 Spring washers (M6) …………………………… 18 ………………………………… 1 e Mounting bracket kit for remote controller … 1 set !2 Flat washers (M6) ………………………………...
CONNECTION AND INSTALLATION I Advanced connections 24 V battery Position and UTC time data (NMEA0183) Printer (IBM ® centronics or compatible) Modem, NBDP (Narrow Band Direct Printing), FAX systems Personal computer CAUTION: Any connected external unit, such as PC, printer, etc., must be properly grounded. We suggest using a wide copper strap.
CONNECTION AND INSTALLATION I Ground connection The transceiver and antenna tuner MUST have an Best ground points adequate RF ground connection. Otherwise, the over- • External ground plate all efficiency of the transceiver and antenna tuner in- • Copper screen stallation will be reduced.
CONNECTION AND INSTALLATION I Power source The transceiver requires a regulated DC power of • Weatherproof cap attachment 26.4 V and at least 30 A. Attach the supplied weatherproof cap for each posi- • Direct connection to 24 V battery in your ship tive and negative line at the DC power terminal as through the supplied DC power cable.
CONNECTION AND INSTALLATION I Antenna Most stations operate with a whip or long wire (insu- lated backstay) antenna. However, these antennas cannot be connected directly to the transceiver since their impedance will not be matched with the trans- ceiver antenna connector. R DANGER: HIGH VOLTAGE! NEVER touch the antenna element/wire while tun-...
CONNECTION AND INSTALLATION I Mounting D Mounting location CAUTION: KEEP the transceiver and handset or Select a location that provides easy access to the con- microphone at least 1 meter away from your ship’s troller for navigation safety, has good ventilation and is magnetic navigation compass.
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CONNECTION AND INSTALLATION D D Mounting angle attachment w Attach the mounting angles using with the supplied q Attach the supplied rubber feet to the mounting hex head bolts , flat and spring washers as (M6×15) angle, if desired. illustrated below. Hex head bolt (M6×15) Spring washer Flat washer...
CONNECTION AND INSTALLATION I Using the optional MB-108 CAUTION! WEAR GLOBES when in- The optional MB-108 mounting bracket is available for stalling the MB-108. mounting the transceiver’s main unit. The MB-108 al- lows you to one-touch attachment/detachment capa- Edges of the MB-108 may be sharp and may easily bilities.
CONNECTION AND INSTALLATION I Using the optional MB-75 The optional MB-75 flush mount is available for mount- CAUTION: KEEP the transceiver and handset or ing the controller and speaker to a flat surface such as microphone at least 1 meter away from your ship’s an instrument panel.
CONNECTION AND INSTALLATION I Fuse replacement The transceiver has 2 fuses to protect internal circuitry. CAUTION: DISCONNECT the DC power cable from If the transceiver stops functioning, check the fuses the transceiver when changing a fuse. below. • DC-DC converter unit ……………………… FGB 5 A •...
CONNECTION AND INSTALLATION I Connector information MICROPHONE Pin Pin name Description Specification MIC+ Audio input from the mic element. Input impedance : 2.4 kΩ No connection. AF output controlled with [VOL]. Ground for AF1. PTT switch input. When grounded, transmits. Connected to the ground.
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CONNECTION AND INSTALLATION I Connector information (continued) PRINTER Pin name Description STROBE Outputs a strobe pulse after data output. 2–9 DATA1–8 Outputs 8-bit parallel data. Input port for the connected printer. ACKNLG “Low” pulse signal is applied from the printer during the printer accepts data input. Input port for the connected printer.
OPTIONS AT-141 RC-25GMDSS SP-24E HF AUTOMATIC ANTENNA TUNER REMOTE CONTROLLER EXTERNAL SPEAKER Matches the transceiver to a long wire Same as that supplied remote with the Same as that supplied with the trans- antenna with a minimum of insertion loss. transceiver.
The tuner is fed with coax (RG 213) and a control line in a capacitive way, which gives just as good a ground effect from the back of the Icom SSB wherever you plan to hide the as if it were actually touching the water! auto-tuner.
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ANTENNA AND GROUNDING CONSIDERATIONS everything of ground potential. If you can get at your keel set, and may even cause burn-outs of tiny integrated circuits bolt, or tap a screw into the keel, your grounding is done. in companion marine electronic gear aboard. ISOLATING Lead incapsulated keels are the ultimate in grounds, and you YOUR RF GROUNDING SYSTEM FROM YOUR DC may need nothing further.
If you try to run the area of the NAV station. It may be glassed into the hull, an ICOM sideband set with a remote tuner that is under- painted over, glued in, or even left resting on the side of the grounded, you stand the chance of not only burning up your hull.
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