Why distress call cannot be transmitted on my Icom IC-M504?
If a distress call cannot be transmitted on your Icom Transceiver, the MMSI (DSC self ID) code might not be programmed. Program the MMSI (DSC self ID) code.
General specifications including frequency coverage, impedance, and power requirements.
Detailed specifications for the transmitter section, including output power and modulation.
Detailed specifications for the receiver section, including sensitivity and selectivity.
Step-by-step instructions for opening the transceiver case for servicing.
Description of the receiver circuits, including antenna switch and RF amplification.
Description of transmitter circuits, including microphone amplifier and APC circuit.
Description of Phase Locked Loop (PLL) circuits for frequency stability.
Description of Digital Selective Calling (DSC) circuits for monitoring CH70.
Required test equipment and connection diagrams for adjustments.
Procedures for adjusting lock voltage and reference frequency.
Procedures for adjusting transmit output power and deviation.
Procedures for adjusting receive sensitivity and squelch.
General specifications including frequency coverage, impedance, and power requirements.
Detailed specifications for the transmitter section, including output power and modulation.
Detailed specifications for the receiver section, including sensitivity and selectivity.
Step-by-step instructions for opening the transceiver case for servicing.
Description of the receiver circuits, including antenna switch and RF amplification.
Description of transmitter circuits, including microphone amplifier and APC circuit.
Description of Phase Locked Loop (PLL) circuits for frequency stability.
Description of Digital Selective Calling (DSC) circuits for monitoring CH70.
Required test equipment and connection diagrams for adjustments.
Procedures for adjusting lock voltage and reference frequency.
Procedures for adjusting transmit output power and deviation.
Procedures for adjusting receive sensitivity and squelch.
General| Type | Marine VHF Transceiver |
|---|---|
| Waterproof Rating | IPX7 |
| Power Supply | 13.8V DC |
| NMEA Connectivity | NMEA 0183 |
| Frequency Range | 156.000 - 163.425 MHz |
| Output Power | 25 W |
| Channels | USA, INT, CAN channels |
| Modulation | FM |
| Current Consumption | 5.5 A |
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