User ManualTable of ContentsINTRODUCTION7CAUTIONS7LIMITED WARRANTY8FEATURES9GPS 18 SERIES10GPS 18 USB10GPS 18 PC10GPS 18 LVC, GPS 18 LVC-5m, and GPS 18-5Hz10TECHNICAL SPECIFICATIONS11Physical Characteristics11Size11Weight11Color11Case Material11Cable Length11Electrical Characteristics11Input Voltage11Input Current11CMOS Serial Output Levels11GPS Receiver Sensitivity12Environmental Characteristics12GPS Performance12Receiver12Acquisition Times12Update Rate12Accuracy12Interfaces13GPS 18 Electrical Characteristics13Garmin Interface and Garmin USB Protocol13GPS 18 PC, GPS 18 LVC, & GPS 18-5Hz Protocols13Measurement Pulse Output (GPS 18 LVC & GPS 18-5Hz only)13GPS 18 LVC & GPS 18-5Hz WIRING AND PINOUTS14GPS 18 LVC & GPS 18-5Hz PINOUT14GPS 18 LVC & GPS 18-5Hz WIRING DIAGRAMS14MECHANICAL CHARACTERISTICS & MOUNTING16GPS 18 PC, GPS 18 LVC, & GPS 18-5Hz SOFTWARE INTERFACE18RECEIVED NMEA 0183 SENTENCES18Almanac Information (ALM)18Sensor Initialization Information (PGRMI)19Sensor Configuration Information (PGRMC)19Additional Sensor Configuration Information (PGRMC1)20Output Sentence Enable/Disable (PGRMO)20TRANSMITTED NMEA 0183 SENTENCES21Sentence Transmission Rate21Transmitted Time22Global Positioning System Almanac Data (ALM)22Global Positioning System Fix Data (GGA)23GPS DOP and Active Satellites (GSA)23GPS Satellites in View (GSV)23Recommended Minimum Specific GPS/TRANSIT Data (RMC)24Track Made Good and Ground Speed (VTG)24Geographic Position (GLL)24Estimated Error Information (PGRME)25GPS Fix Data Sentence (PGRMF)25Sensor Status Information (PGRMT)253D Velocity Information (PGRMV)25DGPS Beacon Information (PGRMB)26BAUD RATE SELECTION26MEASUREMENT PULSE OUTPUT (GPS 18 LVC & 18-5Hz ONLY)26One-Pulse-Per-Second (PPS) Output (GPS 18 LVC Only)26Five-Pulse-Per-Second Output (GPS 18-5Hz Only)26APPENDIX A: EARTH DATUM LIST27APPENDIX B: BINARY PHASE OUTPUT FORMAT30APPENDIX C: CHANGING THE BAUD RATE IN GARMIN MODE35APPENDIX D: GPS 18 PC/ LVC/18-5Hz & WINDOWS SERIAL MOUSE ISSUE36APPENDIX E: SENSOR CONFIGURATION SOFTWARE3838Downloading the Sensor Configuration Software38Selecting a Model38Connecting to the Sensor38File Menu39Comm Menu39Config Menu39View Menu40Help Menu40Size: 687 KBPages: 40Language: EnglishOpen manual