Why is there no sound coming from the speaker of my Icom iM304?
If your Icom Transceiver emits no sound from the speaker, there might be a few reasons. First, the squelch level could be set too high; try adjusting it to the threshold point. Second, the volume level might be too low; increase the volume using the [VOL] control. Finally, the speaker may have been exposed to water; ensure you drain any water from it.
What to do if transmitting is impossible on Icom iM304, or high power cannot be selected?
If you cannot transmit or select high power on your Icom Transceiver, it could be because some channels are set for low power or receive-only. Try changing to a different channel. Alternatively, the output power might be set to low. Push the [HI/LO] button on the microphone to select high power.
Why does scan not start on my Icom iM304?
If the scan function does not start on your Icom Transceiver, it may be because no channels are programmed as “TAG” channels. Set the desired channels as “TAG” channels to resolve this.
How to turn on beeps on Icom iM304 Transceiver?
If your Icom Transceiver is not producing any beeps, the beep tones may be turned off. To resolve this, turn the beep tone ON in Set mode.
What to do if distress call cannot be transmitted on Icom iM304?
If a distress call cannot be transmitted on your Icom Transceiver, the MMSI (DSC self ID) code may not be programmed. Program the MMSI (DSC self ID) code to enable distress call transmission.
General| Operating Temperature Range | -15°C to +55°C |
|---|---|
| Antenna Impedance | 50 Ω |
| Receiver Sensitivity (at 20 dB SINAD) | 0.25 μV |
| Power Supply | 3.7 V DC |
| Type of Emission | 16K0G3E |
| Current Drain (at 3.7 V DC) | 1.5 A |
| Modulation | FM |
Introduction and expression of gratitude for purchasing the Icom radio.
Explanation of terms used in the manual, such as WARNING, CAUTION, and NOTE.
Procedures for contacting other vessels and the Coast Guard during emergencies.
Step-by-step guide for transmitting distress calls using Channel 16.
Procedure for transmitting distress calls using Digital Selective Calling on Channel 70.
Information regarding FCC requirements for radio frequency exposure limits.
Important safety warnings and precautions for operating the transceiver.
Guidelines for proper radio operation, including priorities and licenses.
Rules and regulations pertaining to communication priorities.
Information on necessary ship and operator licenses for using the transceiver.
Details of the transceiver's front panel controls, buttons, and indicators.
Description of the controls and functions of the attached microphone.
Explanation of the various indicators and readouts on the function display.
How to select channels, including Channel 16 and call channels.
Using different channel groups for USA, International, and Canadian regions.
How to select and use the dedicated weather channels for NOAA broadcasts.
Procedures for receiving signals and transmitting messages using the transceiver.
How to program custom call channels for quick recall within channel groups.
Instructions for adding alphanumeric comments to memory channels.
How to enable or disable the microphone lock feature to prevent accidental changes.
How to activate the AquaQuake function to clear water from the speaker grill.
Adjusting the brightness of the LCD and key backlight for visibility.
Explanation of the Priority scan and Normal scan modes.
How to add or remove channels from the scan list (TAG channels).
Step-by-step guide to initiate a scan operation.
Explanation of the functionality of Dualwatch and Tri-watch monitoring.
How to activate and use Dualwatch and Tri-watch modes.
Procedure for programming the 9-digit MMSI (Maritime Mobile Service Identity) code.
How to verify the programmed 9-digit MMSI code.
Instructions for programming and naming DSC address IDs.
Steps for deleting previously programmed DSC address IDs.
How to display current position data received from a GPS receiver.
Procedure for transmitting a critical distress call.
How to send a Digital Selective Calling (DSC) signal to a specific ship.
Procedure for sending an acknowledgement to an Individual DSC call.
How to send a Digital Selective Calling (DSC) signal to a group.
How to send a DSC signal to announce a message to all ships.
How to request a specified ship's current position.
How to announce your own position to a specific ship.
Overview of how to change the transceiver's operational conditions.
Step-by-step guide to enter, navigate, and exit Set mode.
Graphical representation of the available Set mode functions and their flow.
Selection between Normal and Priority scan modes.
Configuration of the scan resume timer setting.
Enabling the weather alert function for NOAA broadcast reception.
Setting the transceiver to monitor Channel 16 and call channel.
Monitoring Channel 70 for DSC signals while operating on other channels.
Turning beep tones ON or OFF for operational feedback.
Setting the automatic acknowledgement function for DSC calls.
Enabling the favorite channel selection feature using TAG channels.
Details on connecting external speaker, GPS receiver, and power source.
List and description of accessories provided with the transceiver.
Information regarding antenna selection and mounting for optimal performance.
Procedure for replacing the fuse in the DC power cable.
Instructions on how to clean the transceiver and microphone.
Instructions for securely mounting the transceiver using the supplied bracket.
Information about the optional MB-92 dust cover for front panel protection.
Steps for installing the optional MB-69 flush mount kit.
Common issues with their possible causes and solutions for troubleshooting.
A comprehensive list of available channels with their frequencies.
Technical details of the transceiver's general, receiver, and transmitter functions.
Details on available optional accessories such as mounting kits and dust covers.
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