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CHAPTER 2. OVERVIEW
GMDSS(Global Maritime Distress and Safety System) is a world-wide maritime distress and
safety communication system, which specifically applied to maritime and land
communications, integrates communication technologies, such as digital communications,
wireless telephone, wireless telex and satellite communications with emergency and safety
communications, navigation alerts and weather alerts, as well as navigation management of
ships, and make it use in general wireless communication and navigation security
communication.
SRG-150DN / 250DN (MF / HF transmit
·
receiving wireless telephone and telegraph
equipment) and SN-100 (NBDP terminal) are composed of MF/ HF transceiver, digital
selective calling device (DSC), DSC W/K Receiver and narrow band direct printing device
(NBDP) and used for digitized information communication suitable for automatic
processing in distress, safety and general situations.
SN-100 is used when connected to the transceiver (SRG-150DN / 250DN) and outputs sub-
carrier signal through the transceiver (SRG-150DN / 250DN) to transmit (Narrow band of
direct printing) NBDP DATA, directly demodulates the received signal (RX) from the
antenna and DISPLAYs the information through the LCD on the front side of the terminal.
Frequency range:
Transmission: 1.605MHz ~ 27.499MHz
Reception: 500KHz ~ 29.99990MHz
Type of radio wave and resulting output
SRG-150DN J3E : 150W(HIGH)/100W(MID)/50W(LOW)
SRG-250DN J3E : 250W(HIGH)/100W(MID)/50W(LOW)
SRG-150DN/250DN F1B : 100W(HIGH,MID)/75W(LOW)
2-1
CHARACTERISTIC
2-1-1
AVAILABLE RANGE
SRG-150DN/250DN has a built in MF/HF Transceiver, DSC W/K Receiver, digital selective
calling device (DSC), Alarm (warning) automatic telephone and can be used by itself. It is
