Garmin 18x Manuale Utente

190-00879-08

GPS 18x Technical Specifications

Rev. D

Page iii

TABLE OF CONTENTS

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

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

Mechanical Characteristics & Mounting.............................................................................10

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