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DGPS BEACON RECEIVER
GR-80
MODEL
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C Your Local Agent/Dealer 9- 52, A s hi har a- c ho, Nishinomiya, Japan Telephone: 0798-65-2111 Telefax: 0798-65-4200 FIRST EDITION : APR. 1997 All rights reserved. Printed in Japan H : MAR. 13, 2001 PUB. No. OME-43830 GR-80 (YOSH )
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SAFETY INSTRUCTIONS CAUTION WARNING Position should always be checked Do not open the equipment. against other sources to confirm reliability. Hazardous voltage which can GPS position and velocity accuracies are cause electrical shock, burn or controlled by the U.S. Department of serious injury exists inside the Defense. equipment. Do not work inside the equipment unless familiar Turn off the equipment whenever you with electrical circuits. feel it is abnormal. Continued use may damage the e
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TABLE OF CONTENTS FOREWORD FOREWORD ............................................. 1 A Word to GR-80 Owners A Word to GR-80 Owners ....................... 1 Features ................................................... 1 FURUNO Electric Company thanks you for SPECIFICATIONS .................................... 2 purchasing the GR-80 DGPS Beacon Re- SYSTEM CONFIGURATION .................. 3 ceiver. We are confident you will discover HOW DGPS WORKS ............................... 4 why the FURUNO na
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SPECIFICATIONS Performance Interface (position input) Frequency range 283.5 – 325.0 kHz Position input NMEA 0183 Freq. resolution 0.5 kHz Hardware spec. Current loop Receiver Single superhetero- Baud rate 4800 bps (fixed) dyne IF frequency 455 kHz Power Requirements Input sensitivity 6 dBμV (MSK rate Power Forward switching -3 100 bps, 10 bit error) (floating) Input voltage 10.2 to 31.2 VDC Data Processing Power consumption Less than 5 W Modulation MSK Data coding Dual Costas loop Mechanical MSK
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SYSTEM CONFIGURATION Whip Antenna ANTENNA COUPLER GPS Antenna Unit FURUNO DGPS BEACON RECEIVER GR-80 LOCK GPS Navigator RECEIVER (GPS Plotter) FREQ MENU ENT RESET t s STN RECTIFIER PR-62 Ship's Mains 100/110/200/220 VAC 12/24 VDC 3
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HOW DGPS WORKS The DGPS reference stations are fixed at a Position accuracy for civil users of GPS is geodetically surveyed position. The refer- limited to about 50 meters. This limitation ence station tracks all satellites in view, exists not only because of the US Depart- downloads ephemeric data from them, and ment of Defense's intentional downgrading computes corrections based on its measure- of the accuracy but also because of signal ment and geodetic position. These correc- attenuation and
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INSTALLATION Ground Antenna Installation If the preamp unit is attached to a steel mast, Siting considerations run a ground wire between the ground ter- minal on the preamp unit and a stainless steel • Install the antenna vertically and as high bolt welded to the mast. The ground wire and far away from surrounding obstacles should be as short as possible. (It is also rec- as possible. ommended to ground the preamp unit when • Separate the antenna at least three meters it is attached to a non-me
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Receiver Unit Installation Connections Siting considerations Power cable connector The receiver can be mounted on a tabletop, on the overhead or in a panel (requires op- I/O cable connector tional flush mount kit). When selecting a mounting location keep the following points 2A POWER DATA ANT in mind; Fuse Antenna cab • Locate the receiver away from rain and (2A) connector +- 10.2-31.2 VDC water splash. • Keep the receiver away from heat sources. • Install the receiver out of direct sunlight. Gr
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Pin arrangement on the DATA connector is Ground shown below. For connection at the GPS Connect a ground wire between the ground navigator, see its manual. terminal at the rear of the receiver and a suit- able ground point. For RS-232C Pin# Signal Description Interface Format 1 TXD Output data The interface format can be RS-232C or RS- 2 NC No connection 422 and the default format is RS-422. For 3 RXD Input data RS-232C, do the following: 4 NC No connection 1. Disconnect cables at the rear of the
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8. Press the [ENT] key. Initial Settings 9. Press the [RESET] key to reset the CPU After installing the equipment, enter baud and return to the normal operation mode. rate of connected GPS receiver, output data 10.Press the [MENU] key. "SET RCV byte format and your area as follows: MODE?" appears. Default settings 11.Press [s ] or [t ] to display "SET STN Baud rate: 4800 bps AREA?" Output data byte format: 6 of 8 12.Press the [ENT] key. Your area: Area 1 (USA, Canada, Ber- 13.Press [s ] or [t ]
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OPERATION Turning the Power On/Off Controls and Indications Power to the equipment may be turned on/ Mode and frequency, or off at the mains switchboard. When the reference station name MM: Manual Mode power is applied or the CPU is reset ([RE- LM: Automatic L/L Mode SET] key pressed) the equipment proceeds LOCK LED as follows: Signal strength Lights when The taller the bar signal from the stronger the beacon station is INDICATION MEANING received signal. received. Appears for FURUNO
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operation menu. To escape from the option Menu Operation mode menu, press the [RESET] key. Most functions are carried out through menus and there are two sets of menus, nor- Menu tree mal operation menu and option mode menu. Figure 9 shows the menu tree. Normal operation menu The normal operation menu mostly contains items used in everyday operations such as dimmer and contrast level adjustment. The [MENU] key opens/closes the menu and goes to preceding menu item when pressed with a menu option
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d) Press [s ] or [t ] to select MSK rate Adjusting Brilliance, Contrast corresponding to frequency selected in step 7. Refer to the DGPS refer- The brilliance and contrast of the LCD can ence station lists which start on page be adjusted as follows: 16. 1. Press the [MENU] key. e) Press the [ENT] key. 2. Press [s ] or [t ] to display "SET DIM- f) Press the [MENU] key. MER?" When signal is received, LOCK LED lights. 3. Press the [ENT] key. Note: If you do not know the MSK rate, 4. Press [s ] or [
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Signal-to-noise (S/N) ratio displays the ra- Displaying Position tio between the desired signal and unwanted 1. Press the [MENU] key. noise on the selected frequency. The higher the S/N ratio the better the quality of the sig- 2. Press [s ] or [t ] to display "MONITOR nal. L/L?" When the ship is in the sy\ervice area of a 3. Press the [ENT] key. Position in latitude beacon station,this number should fbe be- and longitude appears. L/L ERROR ap- tween 20 and 22.If not,chack as follows. pears when
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TROUBLESHOOTING Troubleshooting Table The table which follows will help the user with diagnosing operational problems. Sy ymptom Remed N. o output data • Check power supply • Check DATA connector. • Check host port assignment. R. andom output data • Check if tuned to valid beacon • Radio beacon may be in test mode or off air. • Check if MSK rate is correct. • Check if baud rate is correct. • Measure voltage at antenna coax cable. • Try different beacon antenna. N. o signal lock • Check power sup
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Diagnostic Test Remarks on the diagnostic test • When the equipment finds RAM or ROM The diagnostic test checks the circuit board error RAM NG (No Good) or ROM NG and keys for proper operation. appears and the test stops. Press the [RE- To conduct the diagnostic test; SET] key to reset the CPU. Try the test again. 1. Press [RESET] while pressing and hold- • When the equipment detects a faulty key ing down [MENU]. Release [MENU] two beeps are released. when the display shows "SELF TEST?" 2. Press
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DGPS REFERENCE STATIONS Area 1: USA, Canada, Bermuda (0 = Auto) Location Name in GR-80 Freq. (kHz) Latitude Longitude MSK Rate Country ALEXANDRIA ALEXANDRIA 305 N38.45 W77.07 100 VA,USA ANNETTE ISLAND ANNETTE.IS 323 N55.04 W131.36 100 AK,USA APPLETON APPLETON 300 N45.47 W121.19 100 WA,USA ARANSAS PASS ARANSAS 304 N27.50 W97.04 100 TX,USA BARBERS PT BARBERS.PT 325 N21.18 W158.07 100 HI,USA BASS HARBOR BASS.H 316 N44.13 W68.20 100 ME,USA BRUNSWICK BRUNSWICK 316 N43.53 W69.57 100 ME,USA BUFFALO BUF
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Area 1: USA, Canada, Bermuda (continued) (0 = Auto) Location Name in GR-80 Freq. (kHz) Latitude Longitude MSK Rate Country VICKSBURG VICKSBURG 313 N32.20 W90.55 200 MS,USA WHIDBEY IS WHIDBEY.IS 302 N48.19 W122.42 100 WA,USA WHITEFISH PT WHITEFISH 318 N46.46 W84.57 100 MI,USA WHITNEY WHITNEY 310 N42.44 W103.19 200 NE,USA WILDWOOD WILDWOOD 301 N38.57 W74.52 200 NJ,USA WISCONSIN PT WISCONSIN 296 N46.43 W92.01 100 WI,USA YOUNGSTOWN YOUNGSTOWN 322 N43.14 W78.58 100 NY,USA ALERT BAY ALERT.BAY 309 N50.
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Area 2: Europe, Egypt (0 = Auto) Location Name in GR-80 Freq. (kHz) Latitude Longitude MSK Rate Country OOSTENDE PHARE OOSTENDE 311.5 N51.14 E02.55 100 BELGIUM BLAAVANDS HUK BLAAVANDS 296.5 N55.34 E08.05 100 DENMARK HAMMERODDE HAMMERODDE 289 N55.18 E14.46 100 DENMARK SKAGEN SKAGEN 298.5 N57.44 E10.35 100 DENMARK RISTNA LT RISTNA LT 307 N58.56 E22.04 200 ESTONIA MANTYLUOTO MANTYLUOTO 298 N61.36 E21.28 200 FINLAND OUTOKUMPU OUTOKUMPU 293.5 N62.41 E29.01 200 FINLAND PORKKALA PORKKALA 285 N59.58 E24
