The Marine MF/HF radio is a combined transmitter and receiver much like your VHF. The primary difference between the two is the frequency ranges that they operate in. Typically Marine MF/HF-SSB radios operate in the frequency range of 1.6 MHz to 30 MHz. Probably, the most important concept here is that: “They allow the operator to select a frequency based on atmospheric conditions to establish communications over varying distances.”

Unlike VHF which is typically a line of sight radio, MF/HF radios are able to refract their signals within the atmosphere providing increased range. This plays an important role in a long-distance ship to ship or ship to shore communications.

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Features

• Compliant with ITU, IMO and GMDSS
• Compact & transmitter-receiver with a built-in DSC
• Easy to read information with large LCD(10.4) for NBDP terminal
• Easy to read Rx & Tx frequency at a time
• Available scanning variability of transmitter output, frequency & channel

• High stability for frequency with 10Hz Step Synthesizer
• Built-in alarm signal(2182KHz)
• Storing up to 100 transmitted message(editable)
• Storing up to 100 received message (every 50 messages for distress and ordinary)
• Self-diagnosis function for easy maintenance

Specifications

▶ GENERAL
• Frequence range : TX :1.6~27.5MHz (10Hz STEP) RX :500KHz~29.9999MHz (10Hz STEP)
• TX/RX channel : ITU channel, 300 memory channel
• Frequency tolerance : Within 10HZ
• Type of emission : J3E, H3E, F1B
• Operation : Simplex & Semi-duplex
• Ambient temperature & Humidity : -15℃~+55℃, 95%
• Power supply : DC24V±15%(2.5A at Reception, 15A at Transmittion / SRG-1150DN)
(2.5A at Reception, 25A at Transmittion / SRG-1250DN)

▶ TRANSMITTER
• Type of emission and output : J3E(150W), F1B(100W), H3E(75W):SRG-1150DN J3E(250W), F1B(150W), H3E(75W):SRG-1250DN
• Modulation : Low level balanced
• Occupied bandwidth : Within J3E(3KHz), F1B(0.5KHz)
• Two-tone distress signal : 1300, 2100Hz

▶ RECEIVER
• Sensitivity : J3E 3uV, F1B 3uV, H3E 6uV, S/N 20dB 100m/w
• Intermediate frequency : 49.455MHz, 455KHz
• Overall distortion and noise : More than 20dB
• Input impedance : 50Ω

▶ DSC WATCH KEEPING RECEIVER
• Frequency : 2187.5, 4207.5, 6312, 8414.5, 12577, 16804.5KHz
• Type of emission : F1B
• Frequency shift keying : 1700±85Hz (Mark: 1615Hz, Space: 1785Hz)
• Data transfer speed: 100 baud
• Frequency tolerance : 10Hz

▶ NBDP
• Protocol : 625, 476-4, 490, 491, 492-3 & F130 by CCIR
• Communication mode : ARQ, CFEC, SFEC
• Memory : 16M
• Middle range of frequency : 1700 Hz

• Modulation speed : 100 BAUD(ARQ, FEC MODE)
• Type of modulation : AFSK
• Frequency tolerance : Within 0.5Hz

▶ OPTION(NBDP)
• NBDP TERMINAL (SN-100)
• PRINTER (DPU-414, OKI)
• KEY BOARD (SPR-8630)

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