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TABLE OF CONTENTS
FOREWORD ............................................. 1
A Word to GR-80 Owners ....................... 1
Features ................................................... 1
SPECIFICATIONS .................................... 2
SYSTEM CONFIGURATION .................. 3
HOW DGPS WORKS ............................... 4
INSTALLATION ....................................... 5
Antenna Installation ................................ 5
Receiver Installation ............................... 6
Connections............................................. 6
Interface Format ...................................... 7
Initial Settings ......................................... 8
OPERATION ............................................. 9
Turning the Power On/Off ...................... 9
Controls and Indications ......................... 9
Menu Operation .................................... 10
Adjusting Brilliance, Contrast ...............11
Manual Operation ..................................11
Automatic Operation ..............................11
Displaying Position ............................... 12
Station Scan Time Out .......................... 12
Displaying Signal Strength and
Signal-to-Noise Ratio............................ 12
Remote Control ..................................... 12
TROUBLESHOOTING .......................... 13
Troubleshooting Table .......................... 13
Diagnostic Test...................................... 14
DGPS REFERENCE STATIONS............ 15
EQUIPMENT LISTS............................... 21
CONNECTABLE FURUNO
EQUIPMENT .......................................... 22
REMEDY FOR THE INTERFERENCE
TO A VHF RADIOTELEPHONE ........... 23
TAPING WHIP ANTENNA .................... 25
OUTLINE DRAWING .......................... D-1
INTERCONNECTION DIAGRAM ...... S-1
Declaration of Conformity
FOREWORD
A Word to GR-80 Owners
FURUNO Electric Company thanks you for
purchasing the GR-80 DGPS Beacon Re-
ceiver. We are confident you will discover
why the FURUNO name has become syn-
onymous with quality and reliability.
For over 50 years FURUNO Electric Com-
pany has enjoyed an enviable reputation for
quality and reliability throughout the world.
This dedication to excellence is furthered by
our extensive global network of agents and
dealers.
Your DGPS beacon receiver is designed and
constructed to meet the rigorous demands
of the marine environment. However, no ma-
chine can perform its intended function un-
less properly installed and maintained.
Please carefully read and follow the instal-
lation, operation and troubleshooting proce-
dures set forth in this manual.
We would appreciate feedback from you, the
end-user, about whether we are achieving
our purposes.
Thank you for considering and purchasing
FURUNO.
Features
The GR-80 receives differential error cor-
rection messages (RTCM SC104 format)
which are broadcast by public radio beacons
operating in the 283.5 to 325 kHz frequency
range. The differential error correction mes-
sages are output via a serial port for use in
the associated GPS receiver, resulting in dif-
ferentially correction position data with bet-
ter than 10 meter accuracy.
The GR-80 may be controlled from the front
panel, or remotely via the serial I/O port.
The I/O protocol is NMEA 0183. Output
format is RS-232C or RS-422 (default).