Garmin GPS 18 Technical Specifications
Gps 18 series receiver and antenna
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- Setup manual (4 pages) ,
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Summary of Contents for Garmin GPS 18
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Page 1: Specifications
GPS 18 TECHNICAL SPECIFICATIONS Garmin International, Inc. 1200 E. 151 Street Olathe, KS 66062 USA 190-00307-00, Revision D June 2005 GPS 18 Technical Specifications (190-00307-00) Rev. D... - Page 3 Information in this document is subject to change without notice. Garmin reserves the right to change or improve its products and to make changes in the content without obligation to notify any person or organization of such changes or improvements.
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Page 4: Table Of Contents
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 NMEA 0183 Sentences ...12 4.1.1 Almanac Information (ALM) ...12... - Page 5 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 Downloading the Sensor Configuration Software...32 Selecting a Model...32...
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Page 7: Introduction
The GPS 18 complies with Part 15 of the FCC interference limits for Class B digital devices FOR HOME OR OFFICE USE. These limits are designed to provide reasonable protection against harmful interference in a residential installation, and are more stringent than “outdoor”... -
Page 8: Limited Warranty
Garmin retains the exclusive right to repair or replace the unit or software or offer a full refund of the purchase price at its sole discretion. SUCH REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY. -
Page 9: Features
The GPS 18 series products include an embedded receiver and an antenna. Based on the proven technology found in other Garmin 12-channel GPS receivers, the GPS 18 tracks up to 12 satellites at a time while providing fast time-to-first-fix, precise navigation updates (five times per second for the GPS 18-5Hz, and once per second for the GPS 18 USB, 18 PC, and 18 LVC), and low power consumption. -
Page 10: Gps 18 Series
1.4 GPS 18 SERIES There are several different versions of GPS 18 available. Refer below for a list of the three major divisions of the GPS 18 Series. 1.4.1 GPS 18 USB 1.4.2 GPS 18 PC The GPS 18 PC interfaces to a serial port of a computer via a DB-9 connector and receives power through a 12-volt cigarette lighter adapter. -
Page 11: Technical Specifications
GPS 18 PC: 0 V to 5 V (Asynchronous Serial, TIA-232-F (RS-232) Compatible Polarity) • GPS 18 LVC and GPS 18-5Hz: 0 V to Vin, between 4 and 5.5 V (Asynchronous Serial, TIA-232-F (RS-232) Compatible Polarity) GPS 18 Technical Specifications (190-00307-00) Page 5 Rev. -
Page 12: Gps Receiver Sensitivity
-40°C to +90°C 1.5.4 GPS Performance 1.5.4.1 Receiver WAAS enabled; 12 parallel channel GPS receiver continuously tracks and uses up to 12 satellites (up to 11 with Measurement Pulse Output active) to compute and update your position. 1.5.4.2 Acquisition Times •... -
Page 13: Interfaces
Measurement Pulse Output (or PPS) feature. • GPS 18-5Hz: 5 Hz pulse synchronized with the time of fix. One of the five pulses will align with the UTC second boundary. The pulse width is programmable from 20 ms to 180 ms. The PGRMC sentence will indicate which pulse is at the top-of-the-second. -
Page 14: Gps 18 Lvc & Gps 18-5Hz Wiring And Pinouts
TIA-232-F (RS-232) polarity. The GPS 18 LVC/18-5Hz wires are terminated with a six-wire connector that is used by Garmin for testing purposes. You can remove this connector without voiding your warranty (see Section Warranty). - Page 15 Figure 2. PDA Serial Port Interconnection Figure 3. Basic NMEA Device Interconnection GPS 18 Technical Specifications (190-00307-00) Rev. D Page 9...
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Page 16: Mechanical Characteristics & Mounting
Figure 6 shows the dimensions of our GPS 18 Flush Mount, part number 010-10453-00. - Page 17 Figure 5. GPS 18 Suction Cup Mount Center Hole Dimensions Figure 6. GPS 18 Flush Mount Dimensions Figure 7. GPS 18 Flush Mount Center Hole Dimensions GPS 18 Technical Specifications (190-00307-00) Rev. D Page 11...
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Page 18: Gps 18 Pc, Gps 18 Lvc, & Gps 18-5Hz Software Interface
GPS 18 PC, GPS 18 LVC, & GPS 18-5Hz SOFTWARE INTERFACE The interface protocol design of the GPS 18 PC, LVC, and GPS 18-5Hz products is based on the National Marine Electronics Association’s NMEA 0183 ASCII interface specification. This standard is fully defined in NMEA 0183, Version 2.30. -
Page 19: Sensor Initialization Information
Longitude hemisphere, E or W <5> Current UTC date, ddmmyy format <6> Current UTC time, hhmmss format for GPS 18 PC/LVC; hhmmss.s format for GPS 18-5Hz <7> Receiver Command, A = Auto Locate, R = Unit Reset 4.1.3 Sensor Configuration Information (PGRMC) The $PGRMC sentence provides information used to configure the GPS sensor’s operation. -
Page 20: Additional Sensor Configuration Information (Pgrmc1)
Output Sentence Enable/Disable (PGRMO) The $PGRMO sentence provides the ability to enable and disable specific output sentences. The following sentences are enabled at the factory for the GPS 18 PC and LVC: GPGGA, GPGSA, GPGSV, GPRMC, and PGRMT. The following sentences are enabled at the factory for the GPS 18-5Hz: GPGGA, GPGSA, GPRMC, GPUTG, and PGRMT. -
Page 21: Transmitted Nmea 0183 Sentences
“$” and the termination delimiter <CR><LF>. For the GPS 18 PC and LVC, the factory set defaults result in a once per second transmission at the NMEA 0183 specification transmission rate of 4800 baud. For the GPS 18-5Hz, the factory set defaults will result in a five times per second transmission at 19200 baud. -
Page 22: Transmitted Time
If a negative leap second should be required, one second will be deleted at the end of some UTC month. The minute containing the leap second will be only 59 seconds long. In this case, the GPS sensor will not transmit the time of day 0h 0m 0s (the “zero”... -
Page 23: Global Positioning System Fix Data (Gga)
Global Positioning System Fix Data (GGA) $GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,M,<10>,M,<11>,<12>*hh<CR><LF> <1> UTC time of position fix, hhmmss format for GPS 18 PC or LVC; hhmmss.s format for GPS 18- <2> Latitude, ddmm.mmmm format for GPS 18 PC/LVC; ddmm.mmmmm for GPS 18-5Hz (leading zeros will be transmitted) <3>... -
Page 24: Recommended Minimum Specific Gps/Transit Data (Rmc)
<6> Longitude hemisphere, E or W <7> Speed over ground, GPS 18 PC and LVC: 000.0 to 999.9 knots, GPS 18-5Hz: 000.00 to 999.99 knots (leading zeros will be transmitted) <8> Course over ground, 000.0 to 359.9 degrees, true (leading zeros will be transmitted) <9>... -
Page 25: Estimated Error Information
GPS seconds (0 to 604799) <3> UTC date of position fix, ddmmyy format <4> UTC time of position fix, hhmmss format for GPS 18 PC/LVC; hhmmss.s format for GPS 18- <5> GPS leap second count <6> Latitude, ddmm.mmm format for GPS 18 PC/LVC; ddmm.mmmmm format for GPS 18-5Hz (leading zeros must be transmitted) <7>... -
Page 26: Dgps Beacon Information
Measurement Pulse Output signal, beginning with the GPRMC sentence as the lead sentence in any particular NMEA 0183 record. Regardless of the selected baud rate, the information transmitted by the GPS 18-5Hz is referenced to the preceding five times per-second output pulse. -
Page 27: Appendix A: Earth Datum List
180 ms as described in $PGRMC Section APPENDIX A: EARTH DATUM LIST The following is a list of the Garmin GPS 18 Earth datum indices and the corresponding earth datum name (including the area of application): ADINDAN–Ethiopia, Mali, Senegal, Sudan AFGOOYE–Somalia... - Page 28 NORTH AMERICAN 1927–San Salvador Island NORTH AMERICAN 1983–Alaska, Canada, Central America, CONUS, Mexico NAPARIMA, BWI–Trinidad and Tobago NAHRWAN–Masirah Island (Oman) NAHRWAN–Saudi Arabia NAHRWAN–United Arab Emirates OBSERVATORIO 1966–Corvo and Flores Islands (Azores) OLD EGYPTIAN–Egypt GPS 18 Technical Specifications (190-00307-00) Page 22 Rev. D...
- Page 29 VITI LEVU 1916–Viti Levu Island (Fiji Islands) WAKE-ENIWETOK 1960–Marshall Islands WORLD GEODETIC SYSTEM 1972 WORLD GEODETIC SYSTEM 1984 ZANDERIJ–Surinam CH-1903–Switzerland Hu-Tzu-Shan Indonesia 74 Austria Potsdam Taiwan–modified Hu-Tzu-Shan GDA–Geocentric Datum of Australia Dutch GPS 18 Technical Specifications (190-00307-00) Page 23 Rev. D...
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Page 30: Appendix B: Binary Phase Output Format
Note: For the GPS 18-5Hz, a baud rate of 9600 is not high enough to transmit all of the packets (since they are output at a 5 Hz rate). You will need to change the baud rate to at least 38400 to be able to transmit all of the packets. - Page 31 - cpo_all_sat_data - 0x## (2’s complement of the arithmetic sum of the bytes between the delimiters) - 0x10 (DLE) - 0x03 (ETX is last byte) GPS 18 Technical Specifications (190-00307-00) Meaning when bit is one (1) Page 25 Rev. D...
- Page 32 Longitude (radians) lon_vel Longitude velocity (meters/second) lat_vel Latitude velocity (meters/second) alt_vel Altitude velocity (meters/second) msl_hght Mean sea level height (meters) leap_sec UTC leap seconds grmn_days Garmin days (days since December 31, 1989) GPS 18 Technical Specifications (190-00307-00) Page 26 Rev. D...
- Page 33 Signal strength - db Hz svid Satellite number (0 to 31; 119 to 138 for WAAS). Note: add 1 to offset to current svid numbers. valid 0 = information not valid; non-zero = information valid GPS 18 Technical Specifications (190-00307-00) Page 27 Rev. D...
- Page 34 = DAT; in_que[ in_que_ptr++ ] = data; else if ( rx_state == ETX ) if ( data == DLE_BYTE ) rx_state = DLE; if ( in_que_ptr > 255 ) in_que_ptr = 0; GPS 18 Technical Specifications (190-00307-00) Page 28 Rev. D...
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Page 35: Appendix C: Changing The Baud Rate In Garmin Mode
APPENDIX C: CHANGING THE BAUD RATE IN GARMIN MODE In certain cases, you may need to change the default baud rate of your Garmin GPS receiver while in Garmin mode. Follow these steps to temporarily change the baud rate. Refer to the Garmin Device Interface Specification for details on how to form and parse Garmin packets. -
Page 36: Appendix D: Gps 18 Pc/ Lvc/18-5Hz & Windows Serial Mouse Issue
GPS 18 PC to the serial communications port. This problem is not specific to the GPS 18 PC. Any NMEA 0183 device connected to a Windows computer’s serial port is likely to cause this problem. Below are several possible solutions to this problem. - Page 37 Sensor Configuration. 8. Place a check mark in the box next to “Binary Output Data” to change the GPS 18 to Garmin Mode. The unit will keep this change in the programming until you change it again in the software.
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Page 38: Appendix E: Sensor Configuration Software
The Garmin Sensor Configuration Software (SNSRCFG.exe) is available from the Garmin Web site. To download the software, start at http://www.garmin.com/oem, select the GPS 18, and then select Software Updates. The Garmin Sensor Configuration Software (SNSRCFG.exe) is included in the software update download. -
Page 39: File Menu
Click the box to enable or disable to the sentence. GPS 18 Technical Specifications (190-00307-00) Setup: Opens the Comm Setup Window, shown to the left. Select the Serial Port to which the sensor is connected from the drop- down list. -
Page 40: View Menu
Main Interface Window. Send Configuration To GPS (F9): Sends the changes you have made to the programming to the sensor. Switch to NMEA Mode (F10): Switches the unit to NMEA Mode. The sensor must be in NMEA Mode when connected to this software.