User manual GARMIN GPS 18X TECHNICAL SPECIFICATIONS REV. B, JAN, 2008

[. . . ] 151st Street Olathe, KS 66062 USA 190-00879-08, Revision B January 2008 © 2008 Garmin Ltd. Liberty House, Hounsdown Business Park, Southampton, Hampshire, SO40 9RB, U. K. +44 (0) 870. 8501241 (outside the UK) 0808 2380000 (within the UK) Fax +44 (0) 870. 8501251 Garmin Corporation No. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded, or stored in any storage medium, for any purpose without the express prior written consent of Garmin. [. . . ] Receipt of this sentence by the GPS sensor causes the software to restart the satellite acquisition process. If there are no errors in the sentence, it will be echoed upon receipt. If an error is detected, the echoed PGRMI sentence will contain the current default values. Current PGRMI defaults (with the exception of the Receiver Command, which is a command rather than a mode) can also be obtained by sending $PGRMIE to the GPS sensor. $PGRMI, <1>, <2>, <3>, <4>, <5>, <6>, <7>*hh<CR><LF> <1> <2> <3> <4> <5> <6> <7> Latitude, ddmm. mmm format for GPS 18x PC/LVC; ddmm. mmmmm format for GPS 18x5Hz (leading zeros must be transmitted) Latitude hemisphere, N or S Longitude, ddmm. mmm format for GPS 18x PC/LVC; ddmm. mmmmm format for GPS 18x-5Hz (leading zeros must be transmitted) Longitude hemisphere, E or W Current UTC date, ddmmyy format Current UTC time, hhmmss format for GPS 18x PC/LVC; hhmmss. s format for GPS 18x5Hz Receiver Command, A = Cold Start, R = Unit Reset 4. 1. 3 Sensor Configuration Information (PGRMC) The $PGRMC sentence provides information used to configure the GPS sensor's operation. Configuration parameters are stored in non-volatile memory and retained between power cycles. The GPS sensor will echo this sentence upon its receipt if no errors are detected. If an error is detected, the echoed PGRMC sentence will contain the current default values. Current default values can also be obtained by sending $PGRMCE to the GPS sensor. $PGRMC, <1>, <2>, <3>, <4>, <5>, <6>, <7>, <8>, <9>, <10>, <11>, <12>, <13>, <14>*hh<CR><LF> Fix mode, A = Automatic, 3 = 3D exclusively Altitude above/below mean sea level, -1500. 0 to 18000. 0 meters Earth datum index. If the user datum index (96) is specified, fields <4> through <8> must contain valid values. Refer to Appendix A: Earth Datum List for a list of earth datum and the corresponding earth datum index. <4> User earth datum semi-major axis, 6360000. 000 to 6380000. 000 meters (. 001 meters resolution) <5> User earth datum inverse flattening factor, 285. 0 to 310. 0 (10-9 resolution) <6> User earth datum delta x earth centered coordinate, -5000. 0 to 5000. 0 meters (1 meter resolution) <7> User earth datum delta y earth centered coordinate, -5000. 0 to 5000. 0 meters (1 meter resolution) <8> User earth datum delta z earth centered coordinate, -5000. 0 to 5000. 0 meters (1 meter resolution) <9> Differential mode, A = Automatic (output DGPS data when available, non-DGPS otherwise), D = Differential exclusively (output only differential fixes) <10> NMEA 0183 Baud rate, 3 = 4800, 4 = 9600, 5 = 19200, 6 = 300, 7 = 600, 8 = 38400 (for GPS 18x-5Hz only) <11> No Effect (This field is not used on this model and is included only for backwards compatibility) <12> Measurement Pulse Output, 1 = Disabled, 2 = Enabled <13> Measurement Pulse Output pulse length, (n+1)*20 ms For 18 LVC/PC n = 0 through 48 (max. 180 ms) Example: n = 4 corresponds to a 100 ms wide pulse <14> Dead reckoning valid time 1 to 30 sec. for the GPS 18x-5Hz All configuration changes take effect after receipt of a valid value except baud rate and Measurement Pulse Output mode. Baud rate and Measurement Pulse Output mode changes take effect on the next power cycle or an external reset event. <1> <2> <3> 190-00879-08 GPS 18x Technical Specifications Page 13 Rev. B 4. 1. 4 Additional Sensor Configuration Information (PGRMC1) The $PGRMC1 sentence provides additional information used to configure the GPS sensor operation. Configuration parameters are stored in non-volatile memory and retained between power cycles. The GPS sensor will echo this sentence upon its receipt if no errors are detected. If an error is detected, the echoed PGRMC1 sentence will contain the current default values. Current default values can also be obtained by sending $PGRMC1E to the GPS sensor. [. . . ] 5. To view the current programming of the sensor, select Config > Get Configuration from GPS (or press the F8 key). The current programming of the sensor is displayed in the window shown to the right. 190-00879-08 GPS 18x Technical Specifications Page 31 Rev. B File Menu The File Menu allows you to open, save, and print sensor configurations. The items in the File Menu work like most Windows-based programs. Comm Menu The Comm (Communication) Menu allows you to set the port number, baud rate, and then connect and disconnect from the sensor. [. . . ]