1. DL manuals
  2. Icom
  3. Transceiver
  4. IC-M304
  5. Instruction Manual

Icom IC-M304 Instruction Manual

Other manuals for IC-M304: Service Manual, Instruction Manual
Manual is about: Icom America Inc. VHF Marine Transceiver Instruction Manual

Summary of IC-M304

  • Page 1

    Instruction manual im304 vhf marine transceiver.

  • Page 2: D Features

    I foreword thank you for purchasing this icom radio. The ic-m304 vhf marine transceiver is designed and built with icom’s state of the art technology and craftsmanship. With proper care, this radio should provide you with years of trouble-free oper- ation. We hope you agree with icom’s philosophy of...

  • Page 3

    Ii in case of emergency if your vessel requires assistance, contact other vessels and the coast guard by sending a distress call on channel 16. Or, transmit your distress call using digital selective calling on channel 70. Note a warning sticker is supplied with the transceiver. To comply with fcc r...

  • Page 4

    Iii radio operator warning icom requires the radio operator to meet the fcc requirements for radio frequency expo- sure. An omnidirectional antenna with gain not greater than 9 dbi must be mounted a minimum of 5 meters (measured from the lowest point of the antenna) vertically above the main deck an...

  • Page 5

    Iv foreword …………………………………………………………… i important …………………………………………………………… i explicit definitions ……………………………………………… i in case of emergency…………………………………………… ii note …………………………………………………………………… ii radio operator warning ……………………………………… iii table of contents ……………………………………………… iv precautions …………………………………...

  • Page 6

    V precautions rwarning! Never connect the transceiver to an ac outlet. This may pose a fire hazard or result in an electric shock. Caution: changes or modifications to this device, not ex- pressly approved by icom inc., could void your authority to operate this device under fcc regulations. Never co...

  • Page 7: Operating Rules

    1 1 operating rules d d priorities • read all rules and regulations pertaining to priorities and keep an up-to-date copy handy. Safety and distress calls take priority over all others. • you must monitor channel 16 when you are not operating on another channel. • false or fraudulent distress signals...

  • Page 8: Panel Description

    2 panel description 2 ■ front panel q channel up/down keys [y y]/[z z]•[u/i/c] ➥selects the operating channels, set mode settings, etc. (pgs. 5, 6, 28) ➥while pushing and holding [scan], push to adjust the brightness of the lcd and key backlight. (p. 9) ➥selects one of three channel groups in sequen...

  • Page 9: ■ Microphone

    3 2 panel description y scan key [scan•tag] (p. 11) ➥push to start or stop the normal or priority scan. ➥push and hold for 1 sec. To set or clear the displayed channel as a tag (scanned) channel. • the favorite channels are set by the tag channel setting. ➥while pushing and holding [hi/lo] on the mi...

  • Page 10: ■ Function Display

    4 2 panel description ■ function display q channel group indicator (p. 6) indicates whether a u.S.A. “u,” international “ ” or cana- dian “c” channel is in use. W channel number readout ➥indicates the selected operating channel number. • refer to channel list. (p. 36) ➥in set mode, indicates the sel...

  • Page 11: Basic Operation

    5 3 basic operation 2 3 ■ channel selection ï ï channel 16 channel 16 is the distress and safety channel. It is used for establishing initial contact with a station and for emergency communications. Channel 16 is monitored during both dual- watch and tri-watch. While standing by, you must monitor ch...

  • Page 12

    6 3 basic operation ï ï u.S.A.,canadian and international channels the ic-m304 is pre-programmed with 59 u.S.A., 59 interna- tional and 63 canadian channels. These channel groups may be specified for the operating area. Q push [ch/wx] to select a regular channel. • if a weather channel appears, push...

  • Page 13

    7 3 basic operation 3 ■ receiving and transmitting caution: transmitting without an antenna will damage the transceiver. Q rotate [vol] to turn power on. W set the audio and squelch levels. ➥ rotate [sql] fully counterclockwise in advance. ➥ rotate [vol] to adjust the audio output level. ➥ rotate [s...

  • Page 14: ■ Channel Comments

    8 3 basic operation ■ call channel programming call channel is used to select channel 9 (default), however, you can program the call channel with your most often-used channel in each channel group for quick recall. Q push [u/i/c] (both [y] and [z]) on the transceiver several times to select the desi...

  • Page 15: ■ Display Backlighting

    9 3 basic operation 3 ■ microphone lock function the microphone lock function electrically locks [y] and [z] keys on the supplied microphone. This prevents accidental channel changes and function access. ➥ while pushing and holding [hi/lo] on the microphone, turn power on to toggle the microphone lo...

  • Page 16: Scan Operation

    10 scan operation 4 ■ scan types scanning is an efficient way to locate signals quickly over a wide frequency range. The transceiver has priority scan and normal scan. When the weather alert function is turned on, the previously selected (last used) weather channel is also checked while scanning. (p...

  • Page 17: ■ Setting Tag Channels

    11 4 scan operation 4 ■ setting tag channels for more efficient scanning, add desired channels as tag channels or clear the tag for unwanted channels. Channels that are not tagged will be skipped during scanning. Tag channels can be assigned to each channel group (u.S.A., international and canada) i...

  • Page 18: Dualwatch/tri-Watch

    12 dualwatch/tri-watch 5 ■ description dualwatch monitors channel 16 while you are receiving on another channel; tri-watch monitors channel 16 and the call channel while receiving another channel. Dualwatch/tri- watch are convenient for monitor channel 16 when you are operating on another channel. ■...

  • Page 19: Dsc Operation

    13 6 dsc operation 5 6 ■ mmsi code programming the 9-digit mmsi (maritime mobile service identity: dsc self id) code can be programmed at power on. This code programming can be performed only twice. Q turn power off. W while pushing and holding [dsc], turn power on to enter mmsi code programming con...

  • Page 20: ■ Dsc Address Id

    14 6 dsc operation ■ dsc address id a total of 30 dsc address ids (9-digit) can be programmed and named with up to 5 characters. D programming address id q push [dsc] to enter the dsc menu. W push [y] or [z] to select “ ,” and push [dsc]. E push [y] or [z] to select “ ,” and push [dsc]. R push [y] o...

  • Page 21: ■ Position Indication

    15 6 dsc operation 6 d deleting address id q push [dsc] to enter the dsc menu. W push [y] or [z] to select “ ” and push [dsc]. E push [y] or [z] to select “ ”, then push [dsc]. • when no address id is programmed, “ ” is displayed. R push [y] or [z] to select the desired id name for deleting and push...

  • Page 22: ■ Distress Call

    16 6 dsc operation ■ distress call a distress call should be transmitted if, in the opinion of the master, the ship or a person is in distress and requires imme- diate assistance. Never use the distress call when your ship or a person is not in an emergency. A distress call can be used only when imm...

  • Page 23: ■ Transmitting Dsc Calls

    17 6 dsc operation 6 ■ transmitting dsc calls to ensure correct operation of the dsc function, please make sure you set the squelch correctly. (p. 7) d transmitting individual call the individual call function allows you to transmit a dsc sig- nal to a specific ship only. Q push [dsc] to enter the d...

  • Page 24

    18 6 dsc operation t after transmitting the individual call, standby on channel 70 until an acknowledgement is received. • “ ” scrolls at the channel comment indicator. Y when the acknowledgement ‘able to comply’ is received, the specified channel (in step e) is selected with beeps automatically. Or...

  • Page 25

    19 6 dsc operation 6 r push [dsc] to enter the standby condition for individual acknowledgement call. • “ ” appears at the channel comment indicator. T push [dsc] to transmit the acknowledgement to the se- lected station. Y after the individual acknowledgement has been transmit- ted, the display cha...

  • Page 26

    R push [y] or [z] to select the desired intership channel, and push [dsc]. • channel 70 is selected and “ ” appears. T push [dsc] to transmit the group call. • if channel 70 is busy, the transceiver stands by until the channel becomes clear. • routine category only is available. Y after the group ca...

  • Page 27

    21 6 dsc operation 6 d transmitting all ships call large ships use channel 70 as their ‘listening channel.’ when you want to announce a message to these ships, use the ‘all ships call’ function. Q push [dsc] to enter the dsc menu. W push [y] or [z] to select “ .” e push [dsc] to enter the standby co...

  • Page 28

    22 6 dsc operation d transmitting position request call transmit a position request call when you want to know a specified ship’s current position, etc. Q push [dsc] to enter the dsc menu. W push [y] or [z] to select “ ,” then push [dsc]. E push [y] or [z] to select the desired pre-programmed in- di...

  • Page 29

    23 6 dsc operation 6 d transmitting position report call transmit a position report call when you want to announce your own position to a specific ship and to get an answer, etc. Q push [dsc] to enter the dsc menu. W push [y] or [z] to select “ ,” and push [dsc]. E push [y] or [z] to select the desi...

  • Page 30: ■ Receiving Dsc Calls

    24 6 dsc operation ■ receiving dsc calls d receiving a distress call while monitoring channel 70 and a distress call is received: ➥ the emergency alarm sounds. • push any key to stop the alarm. ➥ “dsc” appears and “ ” scrolls at the channel comment indicator, then channel 16 is automatically se- lec...

  • Page 31

    25 6 dsc operation 6 d receiving an individual call while monitoring channel 70 and an individual call is re- ceived: ➥ the emergency alarm or beeps sound depending on the received category. ➥ “dsc” appears and “ ” scrolls at the channel comment indicator. ➥ push any key to stop beep, then push [dsc...

  • Page 32

    26 6 dsc operation d receiving an all ships call while monitoring channel 70 and an all ships call is received: ➥ the emergency alarm sounds when the category is ‘dis- tress’ or ‘urgency’; 2 beeps sound for other categories. ➥ “dsc” appears and “ ” scrolls at the channel comment indicator. ➥ push an...

  • Page 33

    27 6 dsc operation 6 d receiving a position request call while monitoring channel 70 and a position request call is received: ➥ “dsc” appears and “ ” scrolls at the chan- nel comment indicator. ➥ push any key to stop the beep, then push [dsc] to reply to the call; push any other key to ignore the ca...

  • Page 34: Set Mode

    28 set mode 7 ■ set mode programming set mode is used to change the conditions of the trans- ceiver’s functions: scan type (normal or priority,) scan re- sume timer, weather alert, dual/tri-watch, dsc watch, beep tone, auto acknowledgement and favorite channel function. Available functions may diffe...

  • Page 35: ■ Set Mode Items

    29 7 set mode 7 ■ set mode items d scan type the transceiver has 2 scan types: normal scan and priority scan. Normal scan searches all tag channels in the selected channel group. Priority scan searches all tag channels in se- quence while monitoring channel 16. D d scan resume timer the scan resume ...

  • Page 36

    30 7 set mode d d dsc watch dsc watch monitors channel 70 while you are receiving an- other channel. If a distress signal is received on channel 70, the transceiver monitors channel 16 and 70 alternately until the distress sig- nal disappears. If a signal is received on another channel, dsc watch pa...

  • Page 37: Connections And Maintenance

    31 8 connections and maintenance 7 8 ■ connections q external speaker lead connects to an external speaker. W gps receiver lead connects to a gps receiver for position indication. • an nmea0183 ver. 2.0 or 3.01 (sentence formatters rmc, gga, gns, gll) compatible gps receiver is required. Ask your de...

  • Page 38: ■ Supplied Accessories

    32 8 connections and maintenance ■ supplied accessories the following accessories are supplied: ■ antenna a key element in the performance of any communication sys- tem is the antenna. Ask your dealer about antennas and the best place to mount them. ■ fuse replacement one fuse is installed in the su...

  • Page 39

    33 8 connections and maintenance ■ mounting the transceiver d d using the supplied mounting bracket the universal mounting bracket supplied with your transceiver allows overhead or dashboard mounting. • mount the transceiver securely with the 2 supplied screws (5 × 20) to a surface which is more tha...

  • Page 40

    34 8 connections and maintenance ■ optional mb-69 installation an optional mb-69 flush mount is available for mounting the transceiver to a flat surface such as an instrument panel. Caution: keep the transceiver and microphone at least 1 meter away from your vessel’s magnetic navigation com- pass. Q...

  • Page 41: Troubleshooting

    35 9 troubleshooting problem possible cause solution ref. No sound from speaker. • squelch level is too high. • volume level is too low. • speaker has been exposed to water. P. 7 p. 7 p. 9 • set squelch to the threshold point. • set [vol] to a suitable level. • drain water from the speaker. The tran...

  • Page 42: Channel List

    36 channel list 10 note: simplex channels, 3, 21, 23, 61, 64, 81, 82 and 83 cannot be lawfully used by the general public in u.S.A. Waters. * 1 low power only. * 2 momentary high power. * 3 dsc operation only. Channel number frequency (mhz) 03 156.150 160.750 03 03a 156.150 156.150 156.200 160.800 0...

  • Page 43: Specifications And Options

    37 11 specifications and options 10 11 ■ specifications ï ï general • frequency coverage : transmit 156.025–157.425 mhz receive 156.050–163.275 mhz • mode : fm (16k0g3e) dsc (16k0g2b) • channel spacing : 25 khz • current drain (at 13.8 v) : tx (at 25 w) 5.5 a max. Max. Audio 1.5 a max. • power suppl...

  • Page 44: ■ Options

    38 11 specifications d d dimensions ■ options • mb-69 flush mount kit for mounting the transceiver to a panel. • mb-92 dust cover for attaching to the front panel of the transceiver to protect it when not in use. Unit: mm (inch) 153.0 (6 1 ⁄ 32 ) 67.0 (2 5 ⁄ 8 ) 143.5 (5 21 ⁄ 32 ) 51.0 (2) 42.2 (1 2...

  • Page 45: Template

    39 12 template 11 12 unit: mm (inch) 153.0 (6 1 ⁄ 32 ) 139.0 (5 15 ⁄ 32 ) 67.0 (2 5 ⁄ 8 ) 53.0 (2 3 ⁄ 32 ) cut here note: the solid line is the line to use when cutting into the dash/helm. The dotted line shows the outline of the ic-m304’s front panel once the radio is fitted into the hole. Do not f...

  • Page 47

    Memo.

  • Page 48

    1-1-32 kamiminami, hirano-ku, osaka 547-0003, japan a-6542d-1us printed in japan © 2006 icom inc..