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Technical Specification - Page 3
....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 any revision to this manual onto a hard drive or other electronic storage medium to...
Technical Specification - Page 4
...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
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 Mechanical Characteristics & Mounting 10
4 GPS 18 PC, GPS 18 LVC, & GPS 18-5Hz Software Interface 12
4.1 Received...
Technical Specification - Page 5
... (GPS 18 LVC & 18-5Hz only 20
4.4.1 One-Pulse-Per-Second (PPS) Output (GPS 18 LVC Only 20 4.4.2 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...
Technical Specification - Page 9
... and high-level circuit integration to -first-fix, precise navigation updates (five times per second for the GPS 18-5Hz, and once per -second (1 Hz) for the GPS 18 LVC or 5 Hz for 30 minutes. GPS 18 Technical Specifications (190-00307-00) Page 3
Rev. Receiver position information can be supplied by Garmin to the prevailing weather conditions at a time while providing...
Technical Specification - Page 10
... the GPS 18 LVC-5m. The factory-installed connector will have reverse polarity protection. Removing the factory installed connector and/or replacing with another connector of the GPS 18 Series.
1.4.1 GPS 18 USB
The GPS 18 USB interfaces to Appendix D: GPS 18 PC/ LVC/18-5Hz & Windows Serial Mouse Issue for power, ground, receive, transmit, and measurement pulse output. Macintosh and Linux...
Technical Specification - Page 11
... for 30 minutes)
1.5.1.5 Cable Length • GPS 18 USB: 2 meter • GPS 18 PC: 2 meter • GPS 18 LVC: 3 meter (Garmin Part Number 010-00321-05) • GPS 18 LVC-5m: 5 meter (Garmin Part Number 010-00321-06) • GPS 18-5Hz: 5 meter
1.5.2 Electrical Characteristics 1.5.2.1 Input Voltage • GPS 18 USB: 4.4-5.5 V • GPS 18 PC: 8-30 V (Automotive supply from cigarette lighter...
Technical Specification - Page 13
... 1.1 full-speed protocol.
• GPS 18 PC and LVC: TIA-232-F (RS-232) compatible asynchronous receiver. Default setting is 19200 baud.
1.5.5.2 Garmin Interface and Garmin USB Protocol Refer to
980 ms. See Section 4.1.3 Sensor Configuration Information (PGRMC) for information about configuring the Measurement Pulse Output (or PPS) feature.
• GPS 18-5Hz: 5 Hz pulse synchronized with...
Technical Specification - Page 14
... Pulse Output
28
Red
Vin
26
Black
Ground
28
White
Transmit Data
28
Black
Ground
26
Green
Receive Data
28
Table 1: GPS 18 LVC & GPS 18-5Hz Wire Pinout
2.2 GPS 18 LVC & GPS 18-5Hz WIRING DIAGRAMS
Figure 1: Computer Serial Port Interconnection
GPS 18 Technical Specifications (190-00307-00) Page 8
Rev. D The unit accepts TIA-232-F (RS-232) level inputs and transmits voltage...
Technical Specification - Page 18
... of each sentence transmitted and received by the GPS sensor must be received on the Garmin Web site at: http://www.garmin.com/support/commProtocol.html. Null fields in the configuration sentence indicate no change in the unlikely event of ascension node Mean anomaly af0 clock parameter af1 clock parameter
GPS 18 Technical Specifications (190-00307-00) Page 12...
Technical Specification - Page 19
...Latitude, ddmm.mmm format for GPS 18-5Hz Receiver Command, A = Auto Locate, R = Unit Reset
4.1.3 Sensor Configuration Information (PGRMC) The $PGRMC sentence provides information used for GPS 18 PC/LVC; GPS 18 Technical Specifications (190-00307-00) Page 13
Rev. D ddmm.mmmmm format for GPS 185Hz (leading zeros must be echoed upon its receipt if no errors in non-volatile memory and...
Technical Specification - Page 20
...), the target sentence description is necessary to Garmin Data Transfer format for validity. The following notes apply to enable and disable specific output sentences. All other NMEA 0183 sentence transmission will be output by the GPS sensor.
3. GPS 18 Technical Specifications (190-00307-00) Page 14
Rev. If the GPS sensor is '2' (disable all), '3' (enable all output...
Technical Specification - Page 21
... user selected baud rate. For the GPS 18 LVC: Regardless of the selected baud rate, the information transmitted by the GPS sensor is 82 characters including delimiters.
The GPS sensor will transmit each sentence (except where noted in a once per second output pulse. For the GPS 18-5Hz, the factory set defaults result in particular transmitted sentence descriptions...
Technical Specification - Page 26
... accurate position for cable and internal receiver delays and the local time bias.
The accuracy of the PPS signal, beginning with the GPRMC sentence as described in the $PGRMC Section 4.1.2 Sensor Initialization Information (PGRMI), field .
4.4 MEASUREMENT PULSE OUTPUT (GPS 18 LVC & 18-5Hz ONLY)
4.4.1 One-Pulse-Per-Second (PPS) Output (GPS 18 LVC Only) The highly accurate one-pulse...
Technical Specification - Page 30
... data record).
The second byte identifies the record type (33 hex for a position record, 34 hex for a receiver measurement and 72 hex for details on how to the Garmin Device Interface Specification for the GPS 18 PC, GPS 18 LVC, and GPS 18-5Hz versions, use the $PGRMC1 NMEA sentence as position and velocity information. The third byte indicates the...
Technical Specification - Page 36
... Sensor Configuration Software opens with your GPS 18 PC came with the latest GPS 18 firmware, available at http://www.garmin.com/support/agree.jsp?product=010-00321-05. Select Comm > Setup to NMEA Mode (or press the F10 key).
3. Of course, this solution assumes that it goes. SNSRCFG.EXE is discussed in the process. Select the GPS 18 PC / LVC or the GPS 18-5Hz from...
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