Icom iM423 Instruction Manual
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INSTRUCTION MANUAL

VHF MARINE TRANSCEIVER
iM423
iM424
This device complies with Part 15 of the FCC
Rules. Operation is subject to the condition that
this device does not cause harmful interference.

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Summary of Contents for Icom iM423

  • Page 1: Instruction Manual

    INSTRUCTION MANUAL VHF MARINE TRANSCEIVER iM423 iM424 This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference.
  • Page 2: Important

    IC-M423/IC-M424. We appreciate you making the IC-M423/IC-M424 your ra- dio of choice, and hope you agree with Icom’s philosophy of EXPLICIT DEFINITIONS “technology first.” Many hours of research and development went into the de sign of your IC-M423/IC-M424.
  • Page 3: In Case Of Emergency

    IN CASE OF EMERGENCY If your vessel requires assistance, contact other vessels and Or, transmit your Distress call using digital selective calling the Coast Guard by sending a Distress call on Channel 16. on Channel 70. USING CHANNEL 16 USING DIGITAL SELECTIVE CALLING (Ch 70) DISTRESS CALL PROCEDURE DISTRESS CALL PROCEDURE...
  • Page 4: Radio Operator Warning

    RADIO OPERATOR WARNING FAILURE TO OBSERVE THESE LIMITS MAY ALLOW Icom requires the radio operator to meet the THOSE WITHIN THE MPE RADIUS TO EXPERIENCE RF FCC Requirements for Radio Frequency Expo- RADIATION ABSORPTION WHICH EXCEEDS THE FCC sure. An omnidirectional antenna with gain not MAXIMUM PERMISSIBLE EXPOSURE (MPE) LIMIT.
  • Page 5: Avertissement Pour Les Opérateurs Radio

    AVERTISSEMENT POUR LES OPÉRATEURS RADIO LE NON-RESPECT DE CES LIMITES PEUT CAUSER, POUR LES Icom exige que l'opérateur radio se conforme aux PERSONNES SITUÉES DANS LE RAYON D'EXPOSITION MAXI- exigences de la FCC en matière d'exposition aux MALE ADMISSIBLE, UNE ABSORPTION DE RAYONNEMENT DE radiofréquences.
  • Page 6: Fcc Information

    NOTE FCC INFORMATION • FOR CLASS A UNINTENTIONAL RADIATORS: A WARNING STICKER is supplied with the transceiver. This equipment has been tested and found to comply with the To comply with FCC regulations, this sticker must be affixed in limits for a Class A digital device, pursuant to part 15 of the such a location as to be readily seen from the operating con- FCC Rules.
  • Page 7: Precautions

    Out leads. Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incor- porated (Japan) in Japan, the United States, the United Kingdom, Germany, France, Spain, Russia and/or other countries.
  • Page 8: Table Of Contents

    TABLE OF CONTENTS FOREWORD ................. i Adjusting the volume level ..........15 ■ IMPORTANT ................i Adjusting the squelch level .........15 ■ EXPLICIT DEFINITIONS ............i Adjusting the displaybacklight level ......16 ■ IN CASE OF EMERGENCY ..........ii AquaQuake water draining function ......16 ■...
  • Page 9 PA (Public Address) function ........73 ■ Horn function ..............74 ■ 9 MENU SCREEN OPERATION ........75−82 Menu screen operation ..........75 ■ Menu screen items .............76 ■ Radio Setting items ............77 ■ Configuration items ............78 ■ 10 CONNECTIONS AND MAINTENANCE ....83−89 Connections ...............83 ■...
  • Page 10: Operating Rules

    OPERATING RULES Priorities (2) OPERATOR’S LICENSE A Restricted Radiotelephone Operator Permit is the license • Read all rules and regulations pertaining to call priorities, most often held by small vessel radio operators when a radio and keep an up-to-date copy handy. Safety and distress is not required for safety purposes.
  • Page 11: Panel Description

    PANEL DESCRIPTION Front panel ■ Speaker Function display (p. 5) r UP AND DOWN/CHANNEL SELECT KEYS [∫•CH]/[√•CH] Push to select the operating channels, Menu items, ➥ Menu settings, and so on. (pp. 11, 75) ➥ Push to check TAG channels, change the scanning di- rection or manually resume a scan.
  • Page 12 PANEL DESCRIPTION Dualwatch/Tri-watch [ ] (p. 19) Speaker Function display (p. 5) Push to start a Dualwatch or Tri-watch scan. ➥ Push to stop a Dualwatch or Tri-watch scan when either ➥ is activated. High/Low [ ] (p. 11) Push to set the power to high or low. •...
  • Page 13 PANEL DESCRIPTION AquaQuake [ ] (p. 16) While holding down, the AquaQuake function is activated to clear water away from the speaker grill. Favorite channel [ ] (p. 18) Push to set or clear the displayed channel as a Favorite ➥...
  • Page 14: Function Display

    PANEL DESCRIPTION Function display ■ t CALL CHANNEL ICON (p. 9) Appears when the Call channel is selected. y DUPLEX ICON (p. 10) Appears when a duplex channel is selected. u TAG CHANNEL ICON (p. 18) Appears when a TAG (favorite) channel is selected. i MAIL ICON (p.
  • Page 15 PANEL DESCRIPTION !4 KEY ICON (p. 7) !6 POSITION INDICATOR Shows the programmed function of the softkeys on the ➥ Shows the current position when a GPS receiver is front panel. connected, or the position is manually programmed. • When the GPS position is invalid, “??” may blink every 2 sec- !5 TIME ZONE INDICATOR onds instead of position.
  • Page 16: Speaker Microphone

    Various functions can be assigned to the softkeys. When a key function is assigned, the key icon is displayed above the soft- Microphone key, as shown below. Consult your Icom dealer for details con- cerning which functions are preprogrammed into the keys. Speaker Softkey function selection When “...
  • Page 17: Preparation

    PREPARATION MMSI code programming ■ The 9 digit MMSI (Maritime Mobile Service Identity: DSC self Repeat step e to enter all 9 digits. ID) code can be programmed at power ON. After entering the 9 digit code, “FINISH” is automatically selected, and then push [ENT] or Dial to set it.
  • Page 18: Basic Operation

    BASIC OPERATION Channel selection ■ Channel 16 Call channel Channel 16 is the distress and safety channel. It is used for Each regular channel group has a separate leisure use Call establishing initial contact with a station and for emergency channel.
  • Page 19 BASIC OPERATION Channel group selection There are preprogrammed U.S.A. channels, International Push [EXIT] to exit the Menu screen. channels and Canadian channels. These channel groups Push [ ∫](CH) or [√](CH) to select a channel. may be specified for the operating area. •...
  • Page 20: Receiving And Transmitting

    BASIC OPERATION Receiving and transmitting Weather channels ■ (U.S.A. and Australian version transceiver only) The transceiver has 10 weather channels. These are used for CAUTION: Transmitting without an antenna will damage monitoring broadcasts from NOAA (National Oceanographic the transceiver. and Atmospheric Administration.) The transceiver can automatically detect a weather alert tone Hold down [PWR](Dial) to turn ON the power.
  • Page 21 BASIC OPERATION Information Microphone ✓ The Noise Cancel function reduces random noise components in the transmit and/or receive signal. See page 80 for details. Simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83 CANNOT be lawfully used by the general public in U.S.A. waters. IMPORTANT: To maximize the readability of your transmit- ted signal, pause a few seconds after pushing [PTT], hold the microphone 5 to 10 cm (2 to 4 inches) from your mouth...
  • Page 22: Call Channel Programming

    BASIC OPERATION Call channel programming Channel name programming ■ ■ You can program the Call channel with your most often-used Each channel can be assigned a unique alphanumeric ID of channel in each channel group for quick recall. up to 10 characters. Capital letters, 0 to 9, some symbols (! "...
  • Page 23: Microphone Lock Function

    BASIC OPERATION Microphone Lock function ■ Repeat step e to input all characters. The Microphone Lock function electrically locks [∫], [√] and the [HI/LO] keys on the supplied microphone. This prevents accidental channel changes and function access. While holding down [HI/LO] on the microphone, hold down ➥...
  • Page 24: Adjusting The Volume Level

    BASIC OPERATION Adjusting the volume level Adjusting the squelch level ■ ■ The volume level can be adjusted with [VOL/SQL](Dial). The squelch level can be adjusted with [VOL/SQL](Dial). In order to receive signals properly, as well as for the scan Rotate [VOL/SQL](Dial), or push [VOL/SQL](Dial) one or to function effectively, the squelch must be adjusted to the more times to display the volume adjustment screen.
  • Page 25: Adjusting The Displaybacklight Level

    BASIC OPERATION Adjusting the display AquaQuake water draining ■ ■ backlight level function The function display and keys can be backlit for better visibil- The AquaQuake water draining function clears water away ity under low light conditions. from the speaker grill. Without this function, water may muffle The backlight is adjustable in 7 levels and OFF.
  • Page 26: Scan Operation

    SCAN OPERATION Scan types ■ Scanning is an efficient way to locate signals quickly over a Set the TAG channels (scanned channel) before scanning. wide frequency range. The transceiver has a Priority scan Clear the TAG channels which inconveniently stop scanning, and a Normal scan.
  • Page 27: Setting Tag Channels

    SCAN OPERATION Setting TAG channels Starting a scan ■ ■ For more efficient scanning, add desired channels as TAG First, set the scan type (Priority or Normal scan) and scan channels, or clear the TAG on unwanted channels. resume timer in the Menu screen. (p. 77) Channels that are not tagged will be skipped while scanning.
  • Page 28: Dualwatch/Tri-Watch

    DUALWATCH/TRI-WATCH Description Operation ■ ■ Dualwatch monitors Channel 16 while you are receiving Select Dualwatch or Tri-watch in the Menu screen. (p. 77) Y](CH) or [Z](CH) to select the desired operating on another channel; Tri-watch monitors Channel 16 and the Push [ Call channel while receiving another channel.
  • Page 29: Dsc Operation

    DSC OPERATION DSC address ID ■ Programming Individual ID A total of 100 DSC address IDs can be programmed and as- After entering the 9 digit code, push [ENT] or Dial to set it. signed a name of up to 10 characters. •...
  • Page 30: D Programming Group Id

    DSC OPERATION Programming Group ID Enter “GROUP ID” in the DSC SETTINGS menu. After entering the 9 digit code, push [ENT] or Dial to set it. • The Group ID name programming screen is displayed. ➪ DSC Settings ➪ Group ID MENU...
  • Page 31 DSC OPERATION Deleting Individual/Group ID Enter “INDIVIDUAL ID” or “GROUP ID” in the DSC SET- Push [OK] to delete the ID, and return to the “INDIVIDUAL TINGS menu. ID” or “GROUP ID” list screen. • Push [CANCEL] to cancel it. ➪...
  • Page 32: Position And Time Programming

    DSC OPERATION Position and time programming ■ A Distress call should include the ship’s position and time. If no GPS is connected, your position and UTC (Universal Time Coordinated) time should be manually input. They are auto- matically included when a GPS receiver compatible with the NMEA0183 ver.
  • Page 33: Distress Call

    DSC OPERATION Distress call ■ A Distress call should be transmitted if, in the opinion of the After transmitting the call, the transceiver waits for an ac- Master, the ship or a person is in distress and requires im- knowledgment call. mediate assistance.
  • Page 34: D Regular Call

    DSC OPERATION Regular call The nature of the Distress call should be included in the Dis- Hold down [DISTRESS] for 3 seconds to transmit the Dis- tress call. tress call. • While holding down [DISTRESS], count down beeps sound and both the key and display backlighting blink.
  • Page 35 DSC OPERATION When no GPS receiver is connected, and both position After transmitting the call, the transceiver waits for an ac- and time have been manually programmed, the screen as knowledgment call. shown below appears. Edit your latitude and longitude po- •...
  • Page 36 DSC OPERATION Distress cancel call While waiting for an acknowledgment call, push [CAN- The Distress cancel call is transmitted. CEL]. Channel 16 is automatically selected. Push [CONTINUE]. • Report your situation using the microphone. • After the report, push [EXIT] to return to the normal operating •...
  • Page 37: Transmitting Dsc Calls

    DSC OPERATION Transmitting DSC calls About Manual Inputting: ■ Enter a desired individual ID in the following way: • Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈]. To ensure correct operation of the DSC function, make • Push [ENT] or Dial to set it. sure you correctly set the CH70 SQL LEVEL.
  • Page 38 DSC OPERATION Transmitting an Individual call (continued) Y](CH)/ Select a desired intership channel using Dial or [ Standby on Channel 70 until an acknowledgement is re- [Z](CH), then push [ENT]. ceived. • Intership channels are already preset into the transceiver in the recommended order.
  • Page 39 DSC OPERATION Transmitting an Individual Acknowledgement Or, when the acknowledgement ‘Unable to comply’ is re- When receiving an Individual call, you can transmit an ac- ceived, beeps sound and the screen below is displayed. knowledgement (‘Able to Comply,’ ‘Propose New Channel’ or ‘Unable to Comply’) by using the on-screen prompts (Quick ACK.) Also, you can send an acknowledgement through the MENU system (Man ual ACK.)
  • Page 40 DSC OPERATION Transmitting an Individual Acknowledgement (continued) Select one of three options, then push [ENT]. The Individual ACK confirmation screen is displayed. Push [CALL] to transmit an acknowledgement call. • Able to Comply : Make an acknowledgment call without any changes. The screens shown below are displayed.
  • Page 41: D Transmitting A Group Call

    DSC OPERATION Transmitting a Group call Manual ACK: The Group call function allows you to transmit a DSC signal Enter “INDIVIDUAL ACK” in the DSC CALLS menu. to only a specific group. ➪ DSC Calls ➪ Individual ACK MENU Enter “GROUP CALL” in the DSC CALLS menu. (Push [MENU]) (Rotate Dial, then push [ENT].) ➪...
  • Page 42 DSC OPERATION Transmitting a Group call (continued) About Manual Inputting: Push [CALL] to transmit the Group call. Enter a desired group ID in the following way: • If Channel 70 is busy, the transceiver stands by until the channel becomes clear. •...
  • Page 43: D Transmitting An All Ships Call

    DSC OPERATION Transmitting an All Ships call All ships, that have DSC transceiver, use Channel 70 as their A confirmation screen appears. ‘listening channel.’ When you want to announce a message to • Confirm the call contents. these ships within range, use the ‘All Ships Call’ function. Enter “ALL SHIPS CALL”...
  • Page 44: D Transmitting A Position Request Call

    DSC OPERATION Transmitting a Position Request Call (U.S.A. and Australian version transceiver only) About Manual Inputting: Transmit a Position Request Call when you want to know a specific ship’s current position, etc. Enter a desired individual ID in the following way: •...
  • Page 45 DSC OPERATION Push [CALL] to transmit the Position Request Call. Push [ALARM OFF] to stop the beeps, and then the screen • If Channel 70 is busy, the transceiver stands by until the channel as shown below is displayed. becomes clear. Push [EXIT] to return to the normal operating mode.
  • Page 46 DSC OPERATION Transmitting a Position Report Call (U.S.A. and Australian version transceiver only) About Manual Inputting: Transmit a Position Report Call when you want to announce your own position to a specific ship and receive an answer Enter a desired individual ID in the following way: back.
  • Page 47 DSC OPERATION Push [CALL] to transmit the Position Report Call. When no GPS receiver is connected, and both position and • If Channel 70 is busy, the transceiver stands by until the channel time have been manually programmed, the screen shown becomes clear.
  • Page 48 DSC OPERATION Transmitting a Polling Request Call (U.S.A. and Australian version transceiver only) Transmit a Polling Request Call when you want to know a About Manual Inputting: specific vessel is in the communication area, or not. Enter a desired individual ID in the following way: •...
  • Page 49 DSC OPERATION Push [CALL] to transmit the Polling Request Call. Push [ALARM OFF] to stop the beeps, and then the screen • If Channel 70 is busy, the transceiver stands by until the channel as shown below is displayed. becomes clear. Push [EXIT] to return to the normal operating mode.
  • Page 50: D Transmitting A Test Call

    DSC OPERATION Transmitting a Test call About Manual Inputting: Testing on the exclusive DSC distress and safety calling chan- nels should be avoided as much as possible. When testing on Enter a desired address ID in the following way: a distress/safety channel is unavoidable, you should indicate •...
  • Page 51 DSC OPERATION Push [CALL] to transmit the Test call. Push [ALARM OFF] to stop the beeps, and then the screen • If Channel 70 is busy, the transceiver stands by until the channel as shown below is displayed. becomes clear. Push [EXIT] to return to the normal operating mode.
  • Page 52: D Transmitting A Test Acknowledgement Call

    DSC OPERATION Transmitting a Test Acknowledgement call When the “TEST ACK” in DSC settings is set to ‘Auto TX’ The Test ACK confirmation screen is displayed. (p. 66), the transceiver automatically transmits a reply call Push [CALL] to transmit the acknowledgement call. when receiving a Test call.
  • Page 53 DSC OPERATION Manual ACK: Enter “TEST ACK” in the DSC CALLS menu. The Test ACK confirmation screen is displayed. Push [CALL] to transmit the acknowledgement call. ➪ DSC Calls ➪ Test ACK MENU (Push [MENU]) (Rotate Dial, then push [ENT].) •...
  • Page 54: D Transmitting A Position Reply Call

    DSC OPERATION Transmitting a Position Reply call • Push [INFO] to display the Position Request call information. Transmit a Position Reply call when a Position Request call Push [BACK] to return to the previous screen, or push [ACK]. is received. When the “POSITION ACK”...
  • Page 55 DSC OPERATION Manual Reply: While transmitting the reply call, the screen shown below Enter “POSITION REPLY” in the DSC CALLS menu. is displayed, and then returns to the normal operating mode. DSC Calls Position Reply ➪ ➪ MENU (Push [MENU]) (Rotate Dial, then push [ENT].) •...
  • Page 56 DSC OPERATION Transmitting a Position Report Reply call Transmit a Position Report Reply call when a Position Report • Push [INFO] to display the Position Report Request call informa- tion. Request call is received. Push [BACK] to return to the previous screen, or push [ACK]. Quick Reply: When a Position Report Request call is received, beeps sound and the screen as shown below is displayed.
  • Page 57 DSC OPERATION Manual Reply: Enter “POSITION REPORT REPLY” in the DSC CALLS The Position Report Reply call confirmation screen is dis- menu. played. Push [CALL] to transmit the acknowledgement call. ➪ DSC Calls ➪ Position Report Reply MENU (Push [MENU]) (Rotate Dial, then push [ENT].) •...
  • Page 58: D Transmitting A Polling Reply Call

    DSC OPERATION Transmitting a Polling Reply call Transmit a Polling Reply call when a Polling Request call is • Push [INFO] to display the Polling Request call information. Push [BACK] to return to the previous screen, or push [ACK]. received. When the “POSITION ACK”...
  • Page 59 DSC OPERATION Manual Reply: Enter “POLLING REPLY” in the DSC CALLS menu. While transmitting the reply call, the screen shown below is displayed, and then returns to the normal operating ➪ DSC Calls ➪ Polling Reply MENU mode. (Push [MENU]) (Rotate Dial, then push [ENT].) •...
  • Page 60: Receiving Dsc Calls

    DSC OPERATION Receiving DSC calls ■ [INFO] Receiving a Distress Call ➥ Push to display the Received call information. (p. 64) When a Distress Call is received: The emergency alarm sounds. ➥ “RCVD DISTRESS” pops up and the LCD backlight ➥...
  • Page 61 DSC OPERATION Receiving a Distress Acknowledgement When a Distress Acknowledgement sent to another ship is [INFO] received: ➥ Push to display the Received call information. (p. 64) ➥ The emergency alarm sounds. ➥ “RCVD DISTRESS ACK” pops up and the LCD backlight blinks.
  • Page 62: D Receiving A Distress Relay Call

    DSC OPERATION Receiving a Distress Relay Call When a Distress Relay call is received: [INFO] ➥ The emergency alarm sounds. ➥ Push to display the Received call information. (p. 64) ➥ “RCVD DISTRESS RELAY” pops up and the LCD back- light blinks.
  • Page 63 DSC OPERATION Receiving a Distress Relay Acknowledgement When a Distress Relay Acknowledgement is received: [INFO] ➥ The emergency alarm sounds. ➥ Push to display the Received call information. (p. 64) ➥ “RCVD DIST RELAY ACK” pops up and the LCD backlight blinks.
  • Page 64: D Receiving An Individual Call

    DSC OPERATION Receiving an Individual Call When an Individual Call is received: [IGN] ➥ The alarm sounds for 2 minutes. ➥ Push to ignore the Call and return to the normal operating ➥ “RCVD INDIVIDUAL CALL” pops up. The LCD backlight mode.
  • Page 65: D Receiving A Group Call

    DSC OPERATION Receiving a Group Call When a Group Call is received: [IGN] ➥ The alarm sounds for 2 minutes. ➥ Push to ignore the Call and return to the normal operat- ➥ “RCVD GROUP CALL” pops up. The LCD backlight may ing mode.
  • Page 66: D Receiving An All Ships Call

    DSC OPERATION Receiving an All Ships Call [IGN] When an All Ships Call is received: ➥ The alarm sounds for 2 minutes. ➥ Push to ignore the Call and return to the normal operat- ➥ “RCVD ALL SHIPS CALL” pops up. The LCD backlight may ing mode.
  • Page 67: Receiving A Geographical Area Call

    DSC OPERATION Receiving a Geographical Area Call When a Geographical Area Call (for the area you are in) is [IGN] received: ➥ Push to ignore the Call and return to the normal operat- ➥ The alarm sounds for 2 minutes. ing mode.
  • Page 68: D Receiving A Position Request Call

    DSC OPERATION Receiving a Position Request Call When a Position Request Call is received: [IGN] ➥ The alarm sounds for 2 minutes. ➥ Push to ignore the Call and return to the normal operat- ➥ “RCVD POS REQUEST” pops up. The LCD backlight ing mode.
  • Page 69 DSC OPERATION Receiving a Position Report Call When a Position Report Call is received: [EXIT] ➥ The alarm sounds for 2 minutes. ➥ Push to ignore the Call and return to the normal operat- ➥ “RCVD POSITION REPORT” pops up. The LCD backlight ing mode.
  • Page 70: D Receiving A Polling Request Call

    DSC OPERATION D Receiving a Polling Request call [IGN] When a Polling Request call is received: ➥ The alarm sounds for 2 minutes. ➥ Push to ignore the Call and return to the normal operat- ing mode. ➥ “RCVD POLLING REQUEST” pops up. The LCD backlight blinks for 2 minutes.
  • Page 71: D Receiving A Test Call

    DSC OPERATION D Receiving a Test Call [IGN] When a Test Call is received: ➥ Push to ignore the Call and return to the normal operat- ➥ The alarm sounds for 2 minutes. ing mode. ➥ “RCVD TEST CALL” pops up. The LCD backlight blinks for •...
  • Page 72: Received Call Log

    DSC OPERATION Received Call log Receiving a Test Acknowledgement Call ■ When a Test Acknowledgement Call is received: The alarm sounds for 2 minutes. ➥ The transceiver automatically stores up to 50 distress mes- “RCVD TEST ACK” pops up. The LCD backlight blinks for ➥...
  • Page 73 DSC OPERATION Other messages Push [ p] or [q] to select the desired item, then push [ENT]. Push [LOG] to enter “RCVD CALL LOG” in the DSC CALLS • The message in the unopened file has not been read. menu, or you can enter it through the Menu screen. ➪...
  • Page 74: Transmitted Call Log

    DSC OPERATION Transmitted Call log Received Call log (Continued) ■ ■ Rotate Dial to scroll the message contents. • The stored message has various information, depending on the The transceiver automatically stores up to 50 transmitted DSC call type. calls, and the logs can be used as a supplement to your log- book.
  • Page 75: Dsc Settings

    DSC OPERATION DSC Settings ■ D Position Input Rotate Dial to select “Auto TX” or “Manual TX,” then push (See page 23) D Add Individual ID/Group ID [ENT]. (See pages 20, 21) • Push [BACK] to cancel and return to the DSC Settings menu. D Delete Individual ID/Group ID (See page 22) D Automatic Acknowledgement...
  • Page 76: Channel 16 Switch Function

    DSC OPERATION D Channel 16 Switch function By regulation, after receiving a Distress call, the transceiv- Auto (No Delay) : After receiving a Distress call, and er switches the operating channel to Channel 16. However, [ACPT] is pushed on the confirmation when this setting is set to “OFF,”...
  • Page 77: D Dsc Data Output

    DSC OPERATION D DSC Data Output D Alarm Select an option for the DSC Data Output function. Set the Alarm function ON or OFF, depending on the Cat- When receiving a DSC call, this function makes the trans- egory or Status. ceiver send the DSC data from its NMEA Output port to a connected device.
  • Page 78: Channel 70 Squelch Level

    DSC OPERATION D Channel 70 Squelch level D DSC Loop Test Set the squelch level on Channel 70. The DSC loop test function sends transmit DSC signals to The transceiver has 11 squelch levels between 1 (loose the receive AF circuit to compare and check the TX and RX squelch) and 10 (tight squelch) and OPEN.
  • Page 79: Making An Individual Call Using An Ais Transponder

    DSC OPERATION Making an Individual call using an AIS transponder ■ When the optional MA-500TR CLASS B AIS TRANSPONDER connected to your transceiver, an individual DSC call can be transmitted to a selected AIS target, without needing to enter the target’s MMSI code. In this case, the call type is automati- cally set to Routine.
  • Page 80: Dsc Operation

    DSC OPERATION After making the individual DSC call, the transponder will ‘Able to comply’ is received display “DSC Transmission COMPLETED.” • Push [CLEAR] to return to the screen displayed before you en- tered the voice channel selection screen in step w. •...
  • Page 81: Other Functions

    OTHER FUNCTIONS Intercom operation ■ The optional Intercom function allows you to talk between the After releasing [INCM CALL], hold down [PTT] and speak deck and the cabin. The optional HM-195 into the microphone at a normal voice level. command micro is required for Intercom operation.
  • Page 82: Rx Speaker Function

    OTHER FUNCTIONS RX Speaker function PA (Public Address) function ■ ■ The RX Speaker function enables you to hear the received The transceiver has a PA function to make announcements audio on the deck or bridge through an external speaker. through a PA speaker.
  • Page 83: Horn Function

    OTHER FUNCTIONS Horn function ■ The Horn function sounds a horn. Connect a external speaker as described on page 83. Push [HORN] to enter the Horn mode. Hold down [HORN] to sound a horn. • While holding down [HORN], the horn sounds, and the screen below is displayed.
  • Page 84: Menu Screen Operation

    MENU SCREEN OPERATION ■ Menu screen operation Entering the Menu screen and operation The Menu screen is used for programming infrequently changed values, function settings or sending DSC calls. In addition to this page, see pages 76 through 82 for details. Example: Set the channel group to “INT.”...
  • Page 85: Menu Screen Items

    MENU SCREEN OPERATION Menu screen items ■ Radio Settings The Menu screen contains the following items. Item Ref. Item Ref. DSC Calls • Scan Type p. 77 • Channel Group p. 77 Item Ref. Item Ref. • Scan Timer p. 77 •...
  • Page 86: Radio Setting Items

    MENU SCREEN OPERATION Radio Setting items ■ Scan type Dual/Tri-watch The transceiver has two scan types; Normal scan and Prior- This item can be selected as Dualwatch or Tri-watch. (p. 19) ity scan. A Normal scan searches all TAG channels in the (Default: Dualwatch) selected channel group.
  • Page 87: Configuration Items

    MENU SCREEN OPERATION Configuration items ■ Weather alert Backlight A NOAA broadcast station transmits a weather alert tone be- The function display and keys can be backlit for better visibil- fore important weather information. ity under low light conditions. “WX ”...
  • Page 88 MENU SCREEN OPERATION Key Assignment Desired functions can be assigned to Dial and the softkeys. Push [EXIT] to exit the Menu screen. When the “KEY ASSIGNMENT” screen is displayed, rotate • Push [CLEAR] or [BACK] to return to the previous screen. Dial or push [∫]/[√] to select “Dial”...
  • Page 89 MENU SCREEN OPERATION UTC Offset CHAN (Channel) Set the offset time between the UTC (Universal Time Coordi- nated) and your local time to between –14:00 and +14:00 (in Push Dial one or more times, or rotate Dial to display the 1 minute steps).
  • Page 90: Inactivity Timer

    MENU SCREEN OPERATION • RX Inactivity Timer Turn the receive Noise Cancel function ON or OFF. Set the inactivity timer to between 1 and 10 minutes (in 1 min- ute steps) or OFF for the “Not DSC Related” and “DSC Relat- OFF : Turns OFF the function.
  • Page 91 Set a Remote ID number to between 1 and 69. (Default: 15) When the LCD displays a screen other than the normal opera- The Remote ID is included in the sentence of the Icom origi- tion screen, or one not related to the DSC, and no key opera- nal NMEA format.
  • Page 92: Connections And Maintenance

    CONNECTIONS AND MAINTENANCE Connections ■ Green: Listener B (Data-L) Connects to an NMEA Out Negative line of a GPS receiver for position data. • A NMEA0183 ver. 2.0 or 3.01 RMC, GGA, GNS, GLL and VTG sentence format compatible GPS receiver is required. Ask your dealer about suitable GPS receivers.
  • Page 93 CONNECTIONS AND MAINTENANCE Connect to the MA-500TR r DC POWER CONNECTOR Connect the transceiver to the high-density D-Sub 15-pin Connects to a 13.8 V DC power source. connector of the MA-500TR using the OPC-2014* cable. Af- ter connecting, an Individual DSC call can be made to the CAUTION: After connecting the DC power cable, NMEA AIS target using the transponder without entering the target’s leads, external speaker leads and PA speaker leads, cover...
  • Page 94: Antenna

    CONNECTIONS AND MAINTENANCE Antenna Supplied accessories ■ ■ A key element in the performance of any communication sys- Mounting bracket For mounting bracket tem is the antenna. Ask your dealer about antennas and the best place to mount them. Knob bolts Flat washers (M5) Fuse replacement Screws (5×20 mm)
  • Page 95: Mounting The Transceiver

    CONNECTIONS AND MAINTENANCE Mounting the transceiver ■ Using the supplied mounting bracket The universal mounting bracket supplied with your transceiv- • OVERHEAD MOUNTING er allows overhead or dashboard mounting. Mount the bracket securely to a surface which is more than 10 mm thick and can support more than 5 kg using the 2 supplied screws (5 ×...
  • Page 96: Installation

    CONNECTIONS AND MAINTENANCE MB-69 installation ■ An optional MB-69 is available for mounting the Attach the clamps on either side of the transceiver with 2 flush mount transceiver to a flat surface, such as an instrument panel. M5 × 8 mm supplied bolts. •...
  • Page 97: Microphone Installation

    CONNECTIONS AND MAINTENANCE Microphone installation ■ Using the mounting base as a template, carefully mark the holes where the cable and three screws will be fastened. Drill holes at these marks. Install the mounting base using the supplied screws, as shown below.
  • Page 98 CONNECTIONS AND MAINTENANCE Mounting base Gasket...
  • Page 99: Specifications And Options

    SPECIFICATIONS AND OPTIONS Specifications ■ General Transmitter • Frequency coverage • Output power : 25 W/1 W USA and AUS versions : Tx 156.025–157.425 MHz • Modulation system : Variable reactance frequency Rx 156.050–163.275 MHz modulation CHN version : Tx 156.025–157.425 MHz •...
  • Page 100: Options

    Approved Icom optional equipment is designed for optimal perfor- mance when used with an Icom transceiver. Icom is not responsible for the destruction or damage to an Icom transceiver in the event the Icom transceiver is used with equipment that is not manufactured or approved by Icom.
  • Page 101: Channel List

    CHANNEL LIST Channel number Frequency (MHz) Channel number Frequency (MHz) Channel number Frequency (MHz) Channel number Frequency (MHz) CAN Transmit Receive CAN Transmit Receive CAN Transmit Receive CAN Transmit Receive 156.050 160.650 157.050 161.650 156.425 156.425 157.325 157.325 156.050 156.050 21A 157.050 157.050 156.475 156.475 157.375 161.975...
  • Page 102: Troubleshooting

    TROUBLESHOOTING PROBLEM POSSIBLE CAUSE SOLUTION REF. The transceiver does • Bad connection to the power supply. • Check the connection to the transceiver and p. 83 not turn ON. power supply. Little or no sound comes • Squelch level is set too high. •...
  • Page 103: Template

    TEMPLATE 180 (7 ⁄ 165.1 (6 ⁄ ⁄ R12 (Max.) HM-195 MB-69 29.5 to 31.5 (d) ⁄ to 1 ⁄ Unit: mm (inch)
  • Page 105 MEMO...
  • Page 106 MEMO...
  • Page 107 MEMO...
  • Page 108 A-7011D-1EX Printed in Japan 2012 Icom Inc. © 1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan Printed on recycled paper with soy ink.

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Im424Ic-m423Ic-m424

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