190-00880-00 GPS 20x Technical Specifications Rev. A
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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 Technical Specifications..................................................................................................................................4
1.5.1 Physical Characteristics..................................................................................................................................... 4
1.5.1.1 Size.................................................................................................................................................... 4
1.5.1.2 Weight............................................................................................................................................... 4
1.5.1.3 Color.................................................................................................................................................. 4
1.5.1.4 Case Material..................................................................................................................................... 4
1.5.1.5 Cable Length..................................................................................................................................... 4
1.5.2 Electrical Characteristics................................................................................................................................... 4
1.5.2.1 Input Voltage..................................................................................................................................... 4
1.5.2.2 Input Current..................................................................................................................................... 4
1.5.2.3 GPS Receiver Sensitivity .................................................................................................................. 4
1.5.2.4 Environmental Characteristics........................................................................................................... 4
1.5.3 GPS Performance.............................................................................................................................................. 4
1.5.3.1 Receiver............................................................................................................................................. 4
1.5.3.2 Acquisition Times ............................................................................................................................. 4
1.5.3.3 Update Rate....................................................................................................................................... 4
1.5.3.4 Accuracy ........................................................................................................................................... 5
1.5.4 Interfaces........................................................................................................................................................... 5
1.5.4.1 GPS 20x Electrical Characteristics.................................................................................................... 5
1.5.4.2 Garmin Interface and Garmin USB Protocol..................................................................................... 5
2 Mechanical Characteristics & Mounting...............................................................................6
3 GPS 20x Software Interface....................................................................................................7
3.1 Transmitted NMEA 0183 Sentences...............................................................................................................7
3.1.1 Sentence Transmission Rate.............................................................................................................................. 7
3.1.2 Transmitted Time.............................................................................................................................................. 8
3.1.3 Global Positioning System Fix Data (GGA)..................................................................................................... 8
3.1.4 GPS DOP and Active Satellites (GSA)............................................................................................................. 9
3.1.5 GPS Satellites in View (GSV)........................................................................................................................... 9
3.1.6 Recommended Minimum Specific GPS/TRANSIT Data (RMC)..................................................................... 9
3.1.7 Sensor Status Information (PGRMT).............................................................................................................. 10
Appendix A: Earth Datum List ..................................................................................................11
Appendix B: Garmin Binary Output Format...........................................................................14
LIST OF TABLES AND FIGURES
Figure 1. GPS 20x Top Case Dimensions .....................................................................................................................6
Figure 2. GPS 20x Side View........................................................................................................................................6
Figure 3. GPS 20x End View ........................................................................................................................................6
Table 1: NMEA 0183 Output Sentence Order and Size................................................................................................7
