GPS18_TechnicalSpecification.pdf

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GPS 18
TECHNICAL
SPECIFICATIONS
Garmin International, Inc.
1200 E. 151
st
Street
Olathe, KS 66062 USA
190-00307-00, Revision D
June 2005
GPS 18 Technical Specifications (190-00307-00)
Rev. D
© Copyright 2004–2005
Garmin Ltd. or its subsidiaries
All Rights Reserved
Except as expressly provided below, no part of this manual may be reproduced, copied, transmitted,
disseminated, downloaded or stored in any storage medium, for any purpose without the express prior
written consent of Garmin. Garmin hereby grants permission to download a single copy of this
manual and of any revision to this manual onto a hard drive or other electronic storage medium to be
viewed and to print one copy of this manual or of any revision hereto, provided that such electronic or
printed copy of this manual or revision must contain the complete text of this copyright notice and
provided further that any unauthorized commercial distribution of this manual or any revision hereto
is strictly prohibited.
Information in this document is subject to change without notice. Garmin reserves the right to change
or improve its products and to make changes in the content without obligation to notify any person or
organization of such changes or improvements.
Garmin International, Inc.
1200 East 151st Street,
Olathe, Kansas 66062, U.S.A.
Tel. 913/397.8200 or 800/800.1020
Fax 913/397.8282
Garmin (Europe) Ltd.
Unit 5, The Quadrangle, Abbey Park Industrial Estate,
Romsey, SO51 9DL, U.K.
Tel. 44/0870.8501241
Fax 44/0870.8501251
Garmin Corporation
No. 68, Jangshu 2nd Road,
Shijr, Taipei County, Taiwan
Tel. 886/2.2642.9199
Fax 886/2.2642.9099
Web site address:
www.garmin.com
RECORD OF REVISIONS
Revision
A
B
C
D
Revision
Date
4/5/04
6/7/04
5/24/05
6/6/05
Description
Initial Release
Revise to include PGRMO
Add GPS 18 LVC-5m and GPS 18-5Hz
Add 38400 baud to field 10 of PGRMC sentence
ECO #
--
26125
31279
31511
GPS 18 Technical Specifications (190-00307-00)
Page i
Rev. D
TABLE OF CONTENTS
1
Introduction..................................................................................................................1
1.1 Cautions ............................................................................................................................................1
1.2 Limited Warranty ..............................................................................................................................2
1.3 Features .............................................................................................................................................3
1.4 GPS 18 Series....................................................................................................................................4
1.4.1
1.4.2
1.4.3
1.5.1
GPS 18 USB...................................................................................................................................... 4
GPS 18 PC ........................................................................................................................................ 4
GPS 18 LVC, GPS 18 LVC-5m, and GPS 18-5Hz ........................................................................... 4
Physical Characteristics..................................................................................................................... 5
1.5.1.1 Size.................................................................................................................................... 5
1.5.1.2 Weight ............................................................................................................................... 5
1.5.1.3 Color.................................................................................................................................. 5
1.5.1.4 Case Material..................................................................................................................... 5
1.5.1.5 Cable Length ..................................................................................................................... 5
Electrical Characteristics................................................................................................................... 5
1.5.2.1 Input Voltage..................................................................................................................... 5
1.5.2.2 Input Current ..................................................................................................................... 5
1.5.2.3 CMOS Serial Output Levels.............................................................................................. 5
1.5.2.4 GPS Receiver Sensitivity .................................................................................................. 6
Environmental Characteristics........................................................................................................... 6
GPS Performance .............................................................................................................................. 6
1.5.4.1 Receiver............................................................................................................................. 6
1.5.4.2 Acquisition Times ............................................................................................................. 6
1.5.4.3 Update Rate ....................................................................................................................... 6
1.5.4.4 Accuracy ........................................................................................................................... 6
Interfaces........................................................................................................................................... 7
1.5.5.1 GPS 18 Electrical Characteristics ...................................................................................... 7
1.5.5.2 Garmin Interface and Garmin USB Protocol..................................................................... 7
1.5.5.3 GPS 18 PC, GPS 18 LVC, & GPS 18-5Hz Protocols........................................................ 7
1.5.5.4 Measurement Pulse Output (GPS 18 LVC & GPS 18-5Hz only)...................................... 7
1.5 Technical Specifications ...................................................................................................................5
1.5.2
1.5.3
1.5.4
1.5.5
2
GPS 18 LVC & GPS 18-5Hz Wiring and Pinouts ....................................................8
2.1 GPS 18 LVC & GPS 18-5Hz Pinout.................................................................................................8
2.2 GPS 18 LVC & GPS 18-5Hz Wiring Diagrams ...............................................................................8
3
4
Mechanical Characteristics & Mounting.................................................................10
GPS 18 PC, GPS 18 LVC, & GPS 18-5Hz Software Interface ..............................12
4.1 Received NMEA 0183 Sentences ...................................................................................................12
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.2.7
4.2.8
Almanac Information (ALM) ...........................................................................................................12
Sensor Initialization Information (PGRMI)......................................................................................13
Sensor Configuration Information (PGRMC) ..................................................................................13
Additional Sensor Configuration Information (PGRMC1) ..............................................................14
Output Sentence Enable/Disable (PGRMO).....................................................................................14
Sentence Transmission Rate.............................................................................................................15
Transmitted Time .............................................................................................................................16
Global Positioning System Almanac Data (ALM) ...........................................................................16
Global Positioning System Fix Data (GGA) ....................................................................................17
GPS DOP and Active Satellites (GSA) ............................................................................................17
GPS Satellites in View (GSV)..........................................................................................................17
Recommended Minimum Specific GPS/TRANSIT Data (RMC) ....................................................18
Track Made Good and Ground Speed (VTG) ..................................................................................18
4.2 Transmitted NMEA 0183 Sentences...............................................................................................15
GPS 18 Technical Specifications (190-00307-00)
Page ii
Rev. D
4.2.9
4.2.10
4.2.11
4.2.12
4.2.13
4.2.14
Geographic Position (GLL)..............................................................................................................18
Estimated Error Information (PGRME) ...........................................................................................19
GPS Fix Data Sentence (PGRMF) ...................................................................................................19
Sensor Status Information (PGRMT) ...............................................................................................19
3D Velocity Information (PGRMV).................................................................................................19
DGPS Beacon Information (PGRMB) .............................................................................................20
4.3 Baud Rate Selection ........................................................................................................................20
4.4 Measurement Pulse Output (GPS 18 LVC & 18-5Hz only) ...........................................................20
4.4.1
4.4.2
One-Pulse-Per-Second (PPS) Output (GPS 18 LVC Only)..............................................................20
Five-Pulse-Per-Second Output (GPS 18-5Hz Only).........................................................................20
Appendix A: Earth Datum List ......................................................................................21
Appendix B: Binary Phase Output Format...................................................................24
Appendix C: Changing the Baud Rate in Garmin Mode.............................................29
Appendix D: GPS 18 PC/ LVC/18-5Hz & Windows Serial Mouse Issue ...................30
Appendix E: Sensor Configuration Software................................................................32
Downloading the Sensor Configuration Software............................................................................................32
Selecting a Model.............................................................................................................................................32
Connecting to the Sensor .................................................................................................................................32
File Menu.........................................................................................................................................................33
Comm Menu ....................................................................................................................................................33
Config Menu ....................................................................................................................................................33
View Menu ......................................................................................................................................................34
Help Menu .......................................................................................................................................................34
LIST OF TABLES AND FIGURES
Table 1: GPS 18 LVC & GPS 18-5Hz Wire Pinout ....................................................................................... 8
Figure 1: Computer Serial Port Interconnection............................................................................................. 8
Figure 2. PDA Serial Port Interconnection..................................................................................................... 9
Figure 3. Basic NMEA Device Interconnection............................................................................................. 9
Figure 4a. GPS 18 Bottom Case Dimensions, Under Mold ......................................................................... 10
Figure 4b. GPS 18 Bottom Case, Outside of Casing .................................................................................... 10
Figure 5. GPS 18 Suction Cup Mount Center Hole Dimensions.................................................................. 11
Figure 6. GPS 18 Flush Mount Dimensions................................................................................................. 11
Figure 7. GPS 18 Flush Mount Center Hole Dimensions............................................................................. 11
Table 2: NMEA 0183 Output Sentence Order and Size ............................................................................... 15
Table 3: Characters per Second for Available Baud Rates........................................................................... 15
GPS 18 Technical Specifications (190-00307-00)
Page iii
Rev. D

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