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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 lock function ON
and OFF.

Display backlighting

The function display and keys can be backlit for better visibil-
ity under low light conditions.

While pushing and holding 

[SCAN]

, push 

[

Y

Y

]

or 

[

Z

Z

]

to ad-

just the brightness of the LCD and key backlight.

• The backlight is selectable in 3 levels and OFF.

AquaQuake water draining
function

The IC-M304 uses a new technology to clear water away
from the speaker grill: AquaQuake. AquaQuake helps drain
water away from the speaker housing (water that might oth-
erwise muffle the sound coming from the speaker). The IC-
M304 emits a vibrating noise when this function is being
used.

While pushing and holding 

[

Y

]

and 

[

Z

]

, turn power ON.

• A low beep tone sounds while 

[

Y

]

or 

[

Z

]

keys are held to drain

water, regardless of 

[VOL]

control setting.

• The transceiver never accepts a key operation while the

AquaQuake function is activated.

• “

” scrolls at the channel comment indicator.

Scrolls

[

Y

]/[

Z

]

[HI/LO]

Summary of Contents for iM304

Page 1: ...INSTRUCTION MANUAL iM304 VHF MARINE TRANSCEIVER...

Page 2: ...ly and completely before using the transceiver SAVE THIS INSTRUCTION MANUAL This in struction manual contains important operating instructions for the IC M304 EXPLICIT DEFINITIONS WORD DEFINITION R WA...

Page 3: ...ying the sticker p 32 EXAMPLE WARNING STICKER USING DIGITAL SELECTIVE CALLING Ch 70 DISTRESS CALL PROCEDURE 1 While opening the key cover push and hold DISTRESS for 5 sec until you hear 5 short beeps...

Page 4: ...with radio and antenna when persons are within the MPE radius of the antenna unless such persons such as driver or radio operator are shielded from antenna field by a grounded metallic barrier The MPE...

Page 5: ...Setting TAG channels 11 Starting a scan 11 5 DUALWATCH TRI WATCH 12 Description 12 Operation 12 6 DSC OPERATION 13 27 MMSI code programming 13 MMSI code check 13 DSC address ID 14 Position indication...

Page 6: ...njury KEEP the transceiver at least 3 3 ft 1 m away from the ship s navigation compass DO NOT use or place the transceiver in areas with temper atures below 4 F 20 C or above 140 F 60 C or in areas su...

Page 7: ...radio purposes 2 OPERATOR S LICENSE A Restricted Radiotelephone Operator Permit is the license most often held by small vessel radio operators when a radio is not required for safety purposes The Res...

Page 8: ...ch threshold level r CHANNEL 16 CALL CHANNEL KEY 6 9 Push to select Channel 16 p 5 Push and hold for 1 sec to select call channel p 5 CALL appears when the call channel is selected Push and hold for 3...

Page 9: ...DSC POSITION KEY DSC POS Push to enter DSC menu p 13 Push and hold for 1 sec to show the current position from a GPS receiver p 15 Microphone q PTT SWITCH PTT Push and hold to transmit release to rec...

Page 10: ...nel is selected WX ALT appears when the Weather alert function is in use blinks when an alert tone is received i DSC INDICATORS DSC appears when a DSC call is received p 24 POS REPLY appears when a Po...

Page 11: ...vorite channels in the selected channel group in sequence when pushed The favorite channels are set by the TAG channel setting p 11 Channel 9 Call channel Each regular channel group has a separate lei...

Page 12: ...Push Y or Z to select a channel appears for duplex channels Weather channels The IC M304 has 10 pre programmed weather channels These are used for monitoring broadcasts from NOAA Na tional Oceanic an...

Page 13: ...essary LOW appears when low power is selected Choose low power for short range communications choose high power for longer distance communications Some channels are for low power only y Push and hold...

Page 14: ...l as the call channel Push CH WX to cancel The channel number stops blinking Channel comments Memory channels can be labeled with a unique alphanumeric ID of up to 10 characters each More than 6 chara...

Page 15: ...tness of the LCD and key backlight The backlight is selectable in 3 levels and OFF AquaQuake water draining function The IC M304 uses a new technology to clear water away from the speaker grill AquaQu...

Page 16: ...e Refer to the right page for details Choose Priority or Normal scan in Set mode p 29 PRIORITY SCAN Priority scan searches through all TAG channels in se quence while monitoring Channel 16 When a sign...

Page 17: ...e selected channel group Repeat above procedure to set all TAG channels Starting a scan Set scan type Priority or Normal scan and scan resume timer in advance using Set mode p 29 q Push U I C both Y a...

Page 18: ...h A beep tone sounds when a signal is received on Channel 16 r To cancel Dualwatch or Tri watch push DUAL CH WX DUALWATCH TRI WATCH SIMULATION If a signal is received on Channel 16 Dualwatch Tri watch...

Page 19: ...or starts blinking r Edit the specified MMSI code by pushing Y or Z Push 6 or CH WX to move the cursor forward or backward respectively t Input 9 digit code then push DSC to set the code Returns to th...

Page 20: ...iate address ID Push 6 or CH WX to move the cursor forward or backward respectively Push SCAN to cancel and exit the condition 1st digit 0 is fixed for a group ID When you input 1st digit 0 and other...

Page 21: ...is con nected the transceiver indicates the current position data in seconds of accuracy A NMEA0183 ver 2 0 or 3 01 sentence formatters RMC GGA GNS GLL compatible GPS receiver is required Ask your de...

Page 22: ...l is transmitted e After transmitting the call the transceiver waits for an ac knowledgment call on Channel 70 The Distress call is automatically transmitted every 3 5 to 4 5 minutes scrolls at the ch...

Page 23: ...to select the desired pre programmed individ ual address using Y or Z then push DSC The ID code for the individual call must be set in advance p 14 e Push Y or Z to select a desired intership channel...

Page 24: ...ge to the responding ship when Able to comply is received D Transmitting Individual acknowledgement When receiving an Individual call you can transmit an ac knowledgement Able to comply or Unable to c...

Page 25: ...has been transmit ted the display changes to the channel specified by the calling station automatically when is selected D Transmitting Group call The Group call function allows you to transmit a DSC...

Page 26: ...all If Channel 70 is busy the transceiver stands by until the channel becomes clear Routine category only is available y After the Group call has been transmitted the display changes to the previously...

Page 27: ...on q Push DSC to enter the DSC menu w Push Y or Z to select e Push DSC to enter the standby condition for All Ships call Channel 70 is selected and appears r Push DSC to transmit the All Ships call Ro...

Page 28: ...n dividual address The ID code for position request must be set in advance p 14 r Push DSC to enter the standby condition for Position Re quest call Channel 70 is selected and appears t Push DSC to tr...

Page 29: ...n dividual address The ID code for the position report call can be set in advance p 14 r Push DSC to enter the standby condition for Position Re port call Channel 70 is selected and appears t Push DSC...

Page 30: ...ng a Distress acknowledgement While monitoring Channel 70 and a Distress acknowledge ment to other ship is received The emergency alarm sounds Push any key to stop the alarm DSC appears and scrolls at...

Page 31: ...ice communication depending on your replying con dition see p 18 for individual acknowledgement call pro cedure for details push any other key to ignore the Indi vidual call D Receiving a Group call W...

Page 32: ...While monitoring Channel 70 and a Geographical Area call for the area you are in is received The emergency alarm or beeps sound depending on the received category DSC appears and scrolls at the chan...

Page 33: ...ed and scrolled automatically in order of Latitude co ordinates and then Longitude co ordinates after replying the call D Receiving a Position Reply call While monitoring Channel 70 and a Position Rep...

Page 34: ...g D Set mode operation q Turn power OFF w While pushing 6 turn power ON to enter Set mode e After the display appears release 6 appears at the channel comment indicator r Push 6 to select the desired...

Page 35: ...l has been re ceived on any other channel than Channel 16 D D Weather alert A NOAA broadcast station transmits a weather alert tone be fore important weather information When the weather alert functio...

Page 36: ...D Automatic acknowledgement This item sets the Automatic acknowledgement function ON or OFF When Position Request call or Position Report call is re ceived transceiver automatically transmits Position...

Page 37: ...onnects the supplied DC power cable from this connector to an external 13 8 V DC power source CAUTION After connecting the DC power cable GPS receiver lead and external speaker lead cover the con nect...

Page 38: ...wer cable If a fuse blows or the transceiver stops functioning track down the source of the problem if possible and replace the damaged fuse with a new rated one Cleaning If the transceiver becomes du...

Page 39: ...that the face of the transceiver is at 90 to your line of sight when operating it CAUTION KEEP the transceiver and microphone at least 1 meter away from your vessel s magnetic navigation com pass NOT...

Page 40: ...n to mount the trans ceiver w Slide the transceiver through the hole as shown below e Attach the clamps on either side of the transceiver with 2 supplied bolts 5 8 mm Make sure that the clamps align p...

Page 41: ...the connection to the transceiver Transmitting is impossi ble or high power can not be selected Some channels are for low power or re ceive only The output power is set to low pgs 5 6 36 p 7 Change ch...

Page 42: ...6 075 156 075 156 125 160 725 62 62A 156 125 156 125 156 175 160 775 63 63A 156 175 156 175 64 156 225 160 825 64 64A 64A 156 225 156 225 156 275 160 875 65 65A 65A 156 275 156 275 65A 156 325 160 925...

Page 43: ...825 g 1 8 lb Transmitter Output power 25 W High and 1 W Low Modulation system Variable reactance frequency modu lation Max frequency deviation 5 0 kHz Spurious emissions Less than 70 dBc High Less tha...

Page 44: ...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...

Page 45: ...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 D...

Page 46: ......

Page 47: ...MEMO...

Page 48: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan A 6542D 1US Printed in Japan 2006 Icom Inc...

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