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190-00879-08 GPS 18x Technical Specifications Rev. B
Page ii
TABLE OF CONTENTS
1 Introduction..............................................................................................................................1
1.1 Cautions...........................................................................................................................................................1
1.2 Limited Warranty............................................................................................................................................2
1.3 Overview.........................................................................................................................................................3
1.4 Features ...........................................................................................................................................................3
1.5 GPS 18x Series................................................................................................................................................4
1.5.1 GPS 18x USB.................................................................................................................................................... 4
1.5.2 GPS 18x PC ...................................................................................................................................................... 4
1.5.3 GPS 18x LVC, GPS 18x LVC-5m, and GPS 18x-5Hz ..................................................................................... 4
1.6 Technical Specifications..................................................................................................................................5
1.6.1 Physical Characteristics..................................................................................................................................... 5
1.6.1.1 Size.................................................................................................................................................... 5
1.6.1.2 Weight............................................................................................................................................... 5
1.6.1.3 Color.................................................................................................................................................. 5
1.6.1.4 Case Material..................................................................................................................................... 5
1.6.1.5 Cable Length..................................................................................................................................... 5
1.6.2 Electrical Characteristics................................................................................................................................... 5
1.6.2.1 Input Voltage..................................................................................................................................... 5
1.6.2.2 Input Current..................................................................................................................................... 5
1.6.2.3 CMOS Serial Output Levels.............................................................................................................. 5
1.6.2.4 GPS Receiver Sensitivity .................................................................................................................. 5
1.6.2.5 Environmental Characteristics........................................................................................................... 6
1.6.3 GPS Performance.............................................................................................................................................. 6
1.6.3.1 Receiver............................................................................................................................................. 6
1.6.3.2 Acquisition Times ............................................................................................................................. 6
1.6.3.3 Update Rate....................................................................................................................................... 6
1.6.3.4 Accuracy ........................................................................................................................................... 6
1.6.4 Interfaces........................................................................................................................................................... 6
1.6.4.1 GPS 18x Electrical Characteristics.................................................................................................... 6
1.6.4.2 Garmin Interface and Garmin USB Protocol..................................................................................... 6
1.6.4.3 GPS 18x PC, GPS 18x LVC, & GPS 18x-5Hz Protocols.................................................................. 7
1.6.4.4 Measurement Pulse Output (GPS 18x LVC & GPS 18x-5Hz only).................................................. 7
2 GPSx 18x LVC & GPS 18x -5Hz Wiring and Pinouts .........................................................8
2.1 GPS 18x LVC & GPS 18x -5Hz Pinout..........................................................................................................8
2.2 GPS 18x LVC & GPS 18x -5Hz Wiring Diagrams.........................................................................................8
3 Mechanical Characteristics & Mounting.............................................................................10
4 GPS 18x PC, GPS 18x LVC, & GPS 18x-5Hz Software Interface....................................12
4.1 Received NMEA 0183 Sentences .................................................................................................................12
4.1.1 Almanac Information (ALM).......................................................................................................................... 12
4.1.2 Sensor Initialization Information (PGRMI) .................................................................................................... 13
4.1.3 Sensor Configuration Information (PGRMC) ................................................................................................. 13
4.1.4 Additional Sensor Configuration Information (PGRMC1) ............................................................................. 14
4.1.5 Output Sentence Enable/Disable (PGRMO) ................................................................................................... 14
4.2 Transmitted NMEA 0183 Sentences.............................................................................................................15
4.2.1 Sentence Transmission Rate............................................................................................................................ 15
4.2.2 Transmitted Time............................................................................................................................................ 16
4.2.3 Global Positioning System Almanac Data (ALM).......................................................................................... 16
4.2.4 Global Positioning System Fix Data (GGA)................................................................................................... 17
4.2.5 GPS DOP and Active Satellites (GSA)........................................................................................................... 17
4.2.6 GPS Satellites in View (GSV)......................................................................................................................... 17
4.2.7 Recommended Minimum Specific GPS/TRANSIT Data (RMC)................................................................... 18