SAMYUNG SRG-1150DN / SRG-1250DN / SRG-2150DN / SRG-2250DN MF/HF DSC Radio Equipment – Complete Marine Technical Guide

Product Identification

Manufacturer: SAMYUNG ENC Co., Ltd.

Country of Origin: South Korea

Product Type: MF/HF DSC Radio Equipment with NBDP Capability

Models Covered:

• SRG-1150DN (150W)
• SRG-1250DN (250W)
• SRG-2150DN (150W)
• SRG-2250DN (250W)

Marine Application:

• GMDSS Communication
• Long Range Ship Communication
• Distress & Safety Communication
• Ship-to-Ship Communication
• Ship-to-Shore Communication
• NBDP (Radio Telex) Communication

The SRG series was specifically developed to meet IMO, ITU and GMDSS requirements for medium and long-range maritime communication.

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Product Introduction

The SAMYUNG SRG Series MF/HF DSC Radio System is one of the most widely installed GMDSS communication systems found on merchant vessels, fishing vessels, offshore support vessels, and coastal ships worldwide.

The system integrates:

• MF/HF Transceiver
• DSC Controller
• DSC Watchkeeping Receiver
• NBDP Communication Capability
• Distress Communication Functions

These systems are designed to provide reliable communication over thousands of nautical miles while complying with international maritime safety regulations.

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Actual SAMYUNG SRG System

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What Is This Equipment?

The SRG Series is a complete MF/HF GMDSS Communication System used for:

Distress Communication

Sending emergency DSC distress alerts.

Routine Communication

Voice communication between ships and coast stations.

Safety Communication

Receiving Maritime Safety Information (MSI).

NBDP Communication

Radio Telex communication through the SN-100 terminal.

Long Range Communication

Reliable communication beyond VHF range.

The equipment supports international MF and HF frequencies used by vessels operating in Sea Areas A2, A3, and A4 under GMDSS regulations.

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Main Features

IMO & GMDSS Compliant

Fully compliant with international maritime communication standards.

Integrated DSC

Built-in Digital Selective Calling system.

Large LCD Display

Easy viewing of communication status and frequencies.

NBDP Capability

Compatible with SN-100 NBDP Terminal.

DDS Technology

Direct Digital Synthesizer technology improves communication quality.

Built-In Self Diagnosis

Automatic system monitoring for maintenance support.

Memory Storage

Stores transmitted and received DSC messages.

Multi-Frequency Operation

Supports numerous MF/HF communication channels.

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Typical System Components

The complete system typically includes:

MF/HF Transceiver Unit

Main communication equipment.

SN-100 NBDP Terminal

Used for Radio Telex communication.

SAT-100 Automatic Antenna Tuner

Automatic antenna matching unit.

DSC Watchkeeping Receiver

Continuous monitoring of distress frequencies.

Hand Microphone

Voice communication operations.

External Speaker

Alarm and communication monitoring.

Printer (Optional)

Message printing capability.

Keyboard Interface

Text communication input.

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Technical Specifications

Frequency Range

Transmit:
1.6 MHz – 27.5 MHz

Receive:
500 kHz – 29.9999 MHz

Communication Modes

• J3E
• H3E
• F1B

Power Output

SRG-1150DN

• 150W Voice

SRG-1250DN

• 250W Voice

SRG-2150DN

• 150W Voice

SRG-2250DN

• 250W Voice

Power Supply

24V DC

Operating Temperature

-15°C to +55°C

Memory Channels

300 Channels

DSC Frequencies

• 2187.5 kHz
• 4207.5 kHz
• 6312 kHz
• 8414.5 kHz
• 12577 kHz
• 16804.5 kHz

 

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Marine Applications

Cargo Ships

Primary MF/HF communication.

Tankers

Long-distance safety communication.

Bulk Carriers

Ocean-going communication.

Offshore Vessels

Remote operational communication.

Fishing Vessels

Extended range communications.

Government Vessels

Maritime security communication.

Research Vessels

Worldwide communication coverage.

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Common Problems & Troubleshooting

DSC Alarm Failure

Possible Causes

• Antenna fault
• Receiver failure
• Configuration error

Solution

• Check DSC frequencies
• Inspect antenna connections
• Verify MMSI programming

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ATU Tuning Failure

Possible Causes

• Damaged antenna
• Faulty tuner
• Poor grounding

Solution

• Inspect SAT-100 tuner
• Verify RF cable condition
• Check grounding system

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No Transmission

Possible Causes

• Power supply fault
• PA module fault
• Antenna mismatch

Solution

• Verify 24V supply
• Check transmitter status
• Inspect ATU operation

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NBDP Communication Failure

Possible Causes

• SN-100 connection issue
• Software settings
• Frequency mismatch

Solution

• Verify terminal connection
• Check communication parameters
• Restart NBDP terminal

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Weak Reception

Possible Causes

• Antenna damage
• RF interference
• Receiver sensitivity issue

Solution

• Inspect antenna
• Verify grounding
• Conduct receiver testing

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Maintenance Recommendations

Daily

• Verify DSC watch receiver operation.
• Check communication status.

Weekly

• Inspect microphone and speaker.
• Verify antenna tuner status.

Monthly

• Test distress communication functions.
• Verify NBDP operation.

Quarterly

• Inspect RF connectors.
• Check grounding system.

Annual

• Full GMDSS survey.
• DSC testing.
• Frequency calibration.
• Internal inspection.

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Why Ships Still Use MF/HF Radio Systems

Despite satellite communication technology, MF/HF radios remain essential because:

• GMDSS compliance requires them.
• Independent communication capability.
• Worldwide communication coverage.
• Reliable distress communication.
• Cost-effective long-range communication.

For many vessels, the MF/HF radio remains one of the most critical emergency communication systems onboard.

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Frequently Asked Questions (FAQ)

What is the difference between SRG-1150DN and SRG-1250DN?

The primary difference is transmitter power output:

• SRG-1150DN = 150W
• SRG-1250DN = 250W

What is the SN-100 Terminal?

The SN-100 is an NBDP terminal used for radio telex communication.

What is SAT-100?

SAT-100 is the automatic antenna tuner supplied with the system.

Is the equipment GMDSS approved?

Yes, the SRG series was developed for GMDSS compliance.

Does the system support DSC distress alerts?

Yes. Integrated DSC functionality is a primary feature.

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Short Product Description

The SAMYUNG SRG-1150DN, SRG-1250DN, SRG-2150DN, and SRG-2250DN are professional MF/HF DSC radio communication systems designed for GMDSS-compliant maritime communication. Featuring integrated DSC, NBDP capability, automatic antenna tuning, and long-range communication performance, the SRG series remains a trusted solution for commercial and offshore vessels worldwide.

SM MARINE SERVICE™

Marine Automation & Navigation Equipment Supplier

Available Condition:

• New Equipment
• Used Equipment
• Refurbished Equipment
• Reconditioned Equipment

Stock Location:

• Bangladesh
• China

Services:

• Worldwide Shipping
• Technical Support
• Spare Parts Supply
• Marine Equipment Sourcing

Contact Information

SM MARINE SERVICE™
Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh

Mobile / WhatsApp / Viber: +88 01818 929292

Email: info@smmarineservice.com

Website: www.smmarineservice.com

SM MARINE SERVICE™ supplies MF/HF Radios, GMDSS Equipment, AIS, GPS, Radar, ECDIS, Gyro Compass, Navtex Receivers, Speed Logs, Echo Sounders, VDR Systems, Marine Automation Equipment, and Navigation Spare Parts worldwide.
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