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2-1
2. DSC TERMINAL OPERATIONAL
OVERVIEW
Digital Selective Calling (DSC) is the globally adapted system by
the ITU-R and IMO for selective calling of coast station and ship
radio stations. The DSC system is used for both safety and routine.
The GMDSS requires the use of DSC for distress alerting and safety
calls.
2.1 DSC Controls, LED Warnings
DSC controls
1
DISTRESS
ALARM
STOP
POSITION
DISTRESS CANCEL
2
AUTO ACK
3
TEST
CANCEL
4
PRINT
5
CONTRAST
6
VOLUME
7
FILE
8
RCVD
9
XMTD
SELECT
0
ENT
VHF RADIOTELEPHONE FM-8700
Watch VHF ch70
auto
CH16
TX
CHANNEL
MODE(PUSH)
REM USA WX PRIV
HI
LOW
LOW
AUTO
CALL
SQUELCH
OFF/DW/SCAN(PUSH)
OFF
(PUSH)
VOLUME
LCD
DSC controls
Transmits messages other than distress.
Silences the receive alarm.
Stops repetitive alerts.
Transmits the distress alert. Press the [DISTRESS]
key 4 seconds continuously.
Figure 2-1 FM-8700 transceiver unit