Koden GPS-20A User manual

AMENDMENT HISTORY
GPS-20A INSTALLATION MANUAL
Doc No: 0092621632
No. Document No & Rev No. Date(D/M/Y) Amendments
0 92621632-00 30/02/02 First issue
1 92621632-01 17/05/04 KODEN:address
2 92621632-02 26/05/04 Chapter5 5-5 Type C
3 92621632-03 07/04/05 GRA-20A→GPS-20A
4 0092621632-04 20/06/06 Cover
5 0092621632-05 31/10/07 Chapter 5
6 0092621632-06 12/08/08 Preface / Chapter 1 / Chapter 3
7
8
9
10
Amendment policy
When any change is applied in the document, only the document number of the relevant sheet(s) and
cover sheet are modified and the rest of the sheets are not changed. The document number is shown in
the footer area, right or left bottom of each sheet.
○
c2003 2004 2005 2006 2007 Koden Electronics Co.,Ltd. All rights reserved.
No part of this publication may be reproduced, transmitted, translated in any form by any means without
the written permission of Koden Electronics Co., Ltd. The technical descriptions contained in this
publication are subject to change without notice. Koden assumes no responsibility for any errors,
incidentals or consequential damages caused by misinterpretation of the descriptions contained in this
publication.

GPS-20A Preface
Installation Manual
92621632-06 (1)
Safety Precautions
zDisconnect Main Power
It is still possible to receive an electric shock caused by unintentionally switching on
the power during repair work. To prevent this from happening, make sure to
completely disconnect the unit from the ship’s main supply before attempting any
inspection.
zDust
Dust can accumulate inside after long periods of use. Allergies can result from the
inhalation of this dust, therefore during inspection and cleaning it is advisable to use a
mask.
zStatic Electricity
Static sensitive semiconductor devices are used in this unit. Before changing the
printed boards be careful not to damage any of these devices due to electrostatic build
up from carpet, clothes, seats, etc.

Preface GPS-20A
Installation Manual
(2) 92621632-06
Symbols used in this manual
The following symbols are used in this manual. You are requested to be fully aware of the meaning
of each symbol before carrying out inspection and maintenance of this equipment.
Alarm mark
Caution mark
Warning High Voltage mark
Prohibition mark
To handle the equipment ignoring this sign may lead to injury to
the human body or damage to the equipment.
Warning
To handle the equipment ignoring this sign may lead to electrical
shock to the human body.
This sign indicates that a specified action is prohibited. The
prohibited action will be shown in the vicinity of the mark.
To handle the equipment ignoring this sign may lead to a
malfunction of the equipment.
Caution

GPS-20A Preface
Installation Manual
92621632-06 (3)
How to use this manual
Scope of this manual
This manual contains necessary information about installation of the GPS Receiver
Module GPS-20A .
Structure of this manual
This manual is divided into sections according to the contents as described below.
This arrangement will help you overview the whole of the contents as well as refer to
detailed information for your specific requirement.
Summary of the contents
Chapter 1: Overview
-About GPS and SBAS
-Equipment outline
-Application standard
-Software specification
-Inter-connection diagram
Chapter 2: System composition
-Standard equipment list
-Optional items list
Chapter 3: Specifications
-Specifications
-Serial data
-Power supply specifications
-Compass safe distance
-Operating environment
-External dimensions and Weight
Chapter 4: Installation
-Installation precautions
-Unpacking and inspection of the goods
-Installation site

Preface GPS-20A
Installation Manual
(4) 92621632-06
-Installation method
Chapter 5 : Technical references
-Serial input/output data
-Cable connections and connector pin-outs
-Input/Output circuits
-List of geodetic system

GPS-20A Chapter 1
Installation Manual General Descriptions
Chapter 1 Overview
Contents
Page No.
1.1 GPS........................................................................................1-1
1.1.1 GPS satellite alignment..........................................................1-1
1.1.2 GPS configuration...................................................................1-1
1.2 SBAS (WAAS, EGNOS, MSAS) ............................................1-1
1.3 Equipment outline ................................................................1-1
1.4 Application standard............................................................1-1
1.5 Software specification..........................................................1-1
1.6 Inter-connection diagram.....................................................1-2
92621632-00 Contents

GPS-20A Chapter 1
Installation Manual Overview
92621632-06 1-1
Chapter 1 Overview
1.1 GPS
1.1.1 GPS satellite alignment
GPS (Global Positioning System) is a position measuring system that uses 4 satellites for each of 6
orbits (3 spare), with durations of 11 hours 58 minutes, orbiting approximately 20,000km above the
earth.
1.1.2 GPS configuration
GPS is based on the principle of calculating the distance of 3 or more satellites from the user and
deriving the user’s position. The intersect point of the orbital trajectories becomes the current
measured position (latitude, longitude, altitude).
1.2 SBAS (WAAS, EGNOS, MSAS)
SBAS is a robust system designed to greatly improve the accuracy of GPS positioning using
geo-stationary satellites currently being produced in the US, Europe and Japan. There are 3 types of
systems being produced, WAAS in the US, EGNOS in Europe and MSAS in Japan. WAAS and
EGNOS are currently going through application testing and transmit position correction data at the
same frequency as GPS satellites. Because position correction data is transmitted from geo-stationary
satellites, it is possible to receive position correction data anywhere in the world. However, due to the
fact that these geo-stationary satellites are still going through application testing, the quality of the
position correction data may be degraded without notice.
1.3 Equipment outline
The GPS-20A is a high performance GPS receiver module containing an 18-channel parallel receiver
sensor, which is ready for the SBAS service. By simply connecting a power supply to the GPS-20A,
highly accurate position data can be quickly supplied to a Plotter or the ship’s navigation devices. The
GPS-20A is also compatible with differential correction service broadcast from conventional beacon
stations.
1.4 Application standard
The GPS-20A conforms to the General Requirements of Maritime Navigation and
Radiocommunication Equipment and Systems, IEC 60945 (Ed.3).
1.5 Software specification
PN-012
Caution
GPS uses the (World Geodetic System) coordinate system. On previous global maps,
each zone used a different coordinate system.
However, by using the WGS system
where all zones are unified to one coordinate system, the latitude and longitude are
used in positioning. Therefore, when using a map that uses a different coordinate
system, the map lat/lon may be different to the lat/lon displayed on the navigation unit.

GPS-20A Chapter 1
Installation Manual Overview
1-2 92621632-06
1.6 Inter-connection diagram
Multi Display System
KODEN GENESIS
CW-563-3-＊
B type ﾟ CW-563-2*
A type
CW-563-2*
A type
Connector specifications (option) ＊denotes cable length of 10m or 15m.
GPS receiver module
GPS-20A
Marine Radar
MD-3420/3441 series
MD-3641/3642 series
MD-3840 series
MD-3560/3510 series
Marine Radar
MDC-721/741
MDC-740 series
MDC-1041/1040 series
MDC-1141/1140 series
MDC-1541
MDC-1540/1560 series
MDC-1510/1520 series
MDC-1060/1010 series
Radar Sensor
MDS series
Track Display
GTD-111
GTD-1200A
CVG-1010A/1020A
CVG-7070
Radar / Plotter
MDP-12/20 series
MDP-600 series
Color Sounder
CVS-126
Track Display
GTD-110/150/151
RGD-120/600
CVG-80
CVG-200
Color Sounder
CVS-106L/118 series
CVS-832/833 series
CVS-8841/8842 series
CVS-8816/8826 series
CVS-8851/8852 series
CW-563-1-*
CW-563-3-*
B type
CW-563-1-*
CW-563-*
CW-563-*
CW-563-*
CW-563-3-*
B type
To ship’s power
supply
10.8 to 31.2V
To ship’s power
supply
10.8 to 31.2V
To ship’s power
supply
10.8 to 31.2V
To ship’s power
supply
10.8 to 31.2V
To ship’s power
supply
10.8 to 31.2V
HDEB-9S
HDE-CTF
Fig. 1.1 Inter-connection diagram between GPS receiver module and GPS-20A unit
Marine Radar
MDC-900 series
MDC-1800 series
MDC-22/25 series
Color Sounder
CVS-841 series
CVS-842/852 series
CVS-843 series
CW-563-3-*
To ship’s power
supply
10.8 to 31.2V

GPS-20A Chapter 2
Installation Manual Equipment Composition
Chapter 2 Equipment Composition
Page No.
2.1 Standard equipment..................................................................2-1
2.2 Optional items............................................................................2-1
92621632-00 Contents

GPS-20A Chapter 2
Installation Manual Equipment Composition
Chapter 2 Equipment Composition
2.1 Standard equipment
No. Name Descriptions Remarks Weight Q’ty
Type name not specified
Cable: CW-563-** M without
connectors fitted
Type name not specified
Cable: CW-563-1-** M with 6P
connector (1006) fitted
Type A
Cable: CW-563-2-** M with 6P
connector (1006) fitted
Type B
Cable: CW-563-3-** M with 6P
connector (LTWBD-06BFFA-L180)
fitted
１GPS
Receiver
Module GPS-20A
Type C
Cable: CW-563-4-XX M with 6P
connector (LTWBD-06BFFA-L180)
fitted
250 g
(Cable
not
included)
1
2 Installation
Manual English １
NOTE: The part with asterisk ** indicates the cable length specified. Standard length: 10 m, Optional
length: 15 m
2.2 Optional items
No. Name Descriptions Remarks
１Connector 1005 5 pin
２Connector 1006 6 pin
３Connector LTWBD-06BFFA-L180 6 pin, waterproof type
HDEB-9S D-sub 9 pin
４Connector HDE-CTF Plug jacket
92621632-00 2-1

GPS-20A Chapter 3
Installation Manual Specifications
92621632-06 Contents
Chapter 3 Specifications
Page No.
3.1 Specifications......................................................................... 3-1
3.2 Serial data............................................................................... 3-1
3.3 Power supply specifications ............................................... 3-1
3.4 Compass safe distance......................................................... 3-1
3.5 Operating environment ....................................................... 3-2
3.6 External dimensions and Weight ........................................ 3-2

GPS-20A Chapter 3
Installation Manual Specifications
92621632-06 3-1
Chapter 3 Specifications
3.1 Specifications
Receive frequency 1575.42MHz±1MHz
Receive channels 18 parallel channels
Sensitivity -130dBm
GPS: 10m (2drms, SA=OFF, PDOP<=3)
Position
DGPS: 8m (2drms, SA=OFF, PDOP<=3)
Positioning
accuracy
(PDOP<=3) Speed 1m/sec (rms, SA=OFF, PDOP<=3)
Speed 350km/h max
Tracking Accel. Below 1 G
Position update time
1 sec. (3 sec: option)
Cold start 50secs (standard value)
Warm start 45secs (standard value)
Positioning
time Hot start 20secs (standard value)
RX input SBAS (WAAS, MSAS, EGNOS)
Differential GPS Ext. input RTCM SC-104
3.2 Serial data
(1) Format: IEC 61162-1 (NMEA-0183 Ver. 2.0)
*Ver. 1.5 is available on option basis.
(2) Input data
DGPS Input: RTCM SC-104, 4800bps
Parameter settings: KODEN PRIVATE COMMAND, 4800bps
Refer to chapter 5 for details.
(3) Output data
Sentence: GGA, GLL, VTG, RMC, ZDA, GSA, GSV etc.
3.3 Power supply specifications
Input voltage: 10.8 to 31.2 VDC
Power consumption: 1.3 W max.
3.4 Compass safe distance
Standard: 0.2m
Steering: 0.2m

GPS-20A Chapter 3
Installation Manual Specifications
3-2 92621632-06
3.5 Operating environment
The main operating environment conditions are stated below.
(1) Temperature, humidity
Operating temperature: -25 to +55 degrees celcius
Storage temperature: -40 to +85 degrees celcius
Maximum humidity: 93 ±3% (at +40 degrees celcius)
(2) Vibration
The following levels of vibration can be tolerated with no adverse affect on performance.
Ranging from 2 to 5 Hz to 13.2 Hz, oscillation amount ±1mm±10% (Maximum rate of
7m/s2 at 13.2 Hz)
Maximum acceleration of 7m/s2between 13.2 Hz and 60 Hz.
(3) Water resistance
IPX6 standard (IEC 60945)
Water resistant type (JISF8001)
3.6 External dimensions and weight
Dimensional diagram: Refer to the diagram below
Weight: 250g (0.55 lb) (Except cable)
Figure 3.1 GPS-20A external dimensions

GPS-20A Chapter 4
Installation Manual Installation
92621632-00 Contents
Chapter 4 Installation
PageNo.
4.1 Installation precautions...........................................................4-1
4.2 Unpacking and inspection of the goods................................4-1
4.3 Installation site.........................................................................4-1
4.4 Installation method..................................................................4-3

GPS-20A Chapter 4
Installation Manual Installation
Chapter 4 Installation
4.1 Installation precautions
The installation of the GPS receiver module should only be carried out by qualified technicians.
Installing the GPS receiver module comprises the following actions.
(1) Unpacking and inspecting the components.
(2) Checking the power supply voltage and current capacity is rated for the GPS receiver module.
(3) Determining the installation site.
(4) Cable laying.
(5) Installing the GPS receiver module.
4.2 Unpacking and inspection of the goods
Unpack the contents and check each component against the component delivery list. If the contents
differ from that which is on the list, or there are damaged components, contact the shipping agent or
the nearest KODEN dealer.
4.3 Installation site
Be sure to install the GPS sensor in the highest possible location on the ship for optimum reception of
the satellite signal.
Any obstructions in the vicinity of the antenna could result in the loss of the satellite signal reception,
positioning time degradation or a reduction in the position accuracy.
(1) Keep at least 0.5m away from metallic objects.
(2) Keep at least 4m away from MF/HF L type transmission antennas and VHF or HF whip antennas.
(3) Keep at least 1.5m away vertically, from MF/HF L type transmission antennas.
(4) Keep at least 1m away from receive antennas.
(5) Install away from the ship’s radar beam (straight beam angle: 30 – 40 degrees).
(6) Keep at least 1m away from the ship’s Radar antenna.
(7) Keep at least 5m away from the INMARSAT antenna.
(8) Keep at least 3m away from loop antennas.
(9) Keep at least 2m away from the ship’s engine.
(10) Display devices such as cathode ray tubes and LCDs can sometimes interfere with the reception
of beacon signals. Keep at least 1m away from display devices such as Plotters, Radars and
Sounders.
Refer to Table 1 for the recommended safe installation distances from masts and struts of the ship’s
super-structure.
92621632-00 4-1

Chapter 4 GPS-20A
Installation Installation Manual
Table 1 Minimum distances between support struts
Object Diameter Minimum distance
Support strut 10cm 1.5m
Support strut 30cm 3.0m
Fig. 4.1 Recommended installation site for the GPS sensor
DGPS sensor
Marine electronic display device
Wheel House
VHF whip antenna
4m (min)
4m (min)
Loo
p
antenna
RX whip antenna
1m (min)
INMARSAT
antenna
HF whi
p
antenna
MF/HF L type
RX antenna
5m (min)
3m (min)
4m (min)
Note
1.5m (min)
Note: Keep at least 0.5m away from metallic objects.
[Not to scale]
4m (min)
1m (min)
Keep outside of Radar
beam (30 – 40 degrees)
Radar beam
1m (min)
4-2 92621632-00

GPS-20A Chapter 4
Installation Manual Installation
4.4 Installation method
The following examples show typical installation methods.
Installation example 1: The pole used has no screw thread tooled. Fix the GPS antenna to the pole
using the hose band and tighten firmly.
Installation example 2 and 3: The pole used is screw threaded (1-14UNS-2A). In a case when the
connecting cable cannot be put through inside the pole, fix the cable at an interval of 30 – 40 cm to the
pole using an appropriate tie (See NOTE).
NOTE: A plastic tie is subject to deterioration caused by ultraviolet ray, etc. Use a stainless tie or
equivalent, having stable characteristic against the harsh marine environment.
Installation example 1 GPS sensor
Hose band (User supply)
Apply appropriate slack
at the cable outlet
Mast (or pole)
Cable fixing point
GPS sensor
Keep the cable away from
the pole as possible to
avoid scratching by the
exposed thread.
Installation example 2
Apply appropriate slack at
the cable outlet
Cable fixing point
Thread: 1-14UNS-2A
Thread per 25.4 mm (1 inch): 14
Pitch：1.8143 mm
Thread length：26 mm
Thread diameter：25.4 mm
Pitch diameter：24.221 mm
Mounting pipe (User supply)
92621632-00 4-3

Chapter 4 GPS-20A
Installation Installation Manual
4-4 92621632-00
Installation example 3
Connecting cable
GPS sensor
Mounting pipe (User supply)
Thread: 1-14UNS-2A
Thread per 25.4 mm (1 inch): 14
Pitch: 1.8143 mm
Thread length: 26 mm
Thread diameter: 25.4 mm
Pitch diameter: 24.221 mm

GPS-20A Chapter 5
Installation Manual Technical References
Chapter 5 Technical References
Contents
PageNo.
5.1 Serial input/output data............................................................... 5-1
5.1.1 Input data.......................................................................................5-1
5.1.1.1 Various settings.................................................................................5-1
5.1.1.2 DGPS correction data.......................................................................5-1
5.1.2 Output data....................................................................................5-1
5.1.2.1 Format...............................................................................................5-1
5.1.2.2 Data form..........................................................................................5-1
5.1.2.3 Data configuration.............................................................................5-2
5.1.2.4 Output sentence................................................................................5-2
5.2 Cable connections and connector pin-outs.............................. 5-4
5.3 Input/Output circuits ................................................................... 5-6
5.3.1 Connections to navigation unit...................................................5-6
5.3.2 Connections to beacon receiver .................................................5-6
5.3.3 GPS-20A input/output circuit.......................................................5-6
5.4 List of geodetic system ............................................................. 5-7
92621632-00 Contents