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GPS 35 LP TM
Models:
GPS35-LVS
GARMIN · 1200 E. 151st Street · 66062 · (913) 397-8200 · (913) 397-8282 FAX
Olathe, Kansas
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GPS35-HVS
GPS35-LVC
TECHNICAL SPECIFICATION
GPS SMART ANTENNA
TracPak
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© 2000 GARMIN Corporation, 1200 E. 151st Street, Olathe, KS 66062 All rights reserved. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose without the express written permission of GARMIN. Information in this document is subject to change without notice. GARMIN reserves the right to change or improve their products and to make changes in the content without obligation to notify any pe
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The GPS system is operated by the government of the United States which is solely responsible for its accuracy and maintenance. Although the GPS 35LP is a precision electronic NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted, and therefore become unsafe. Use the GPS 35LP at your own risk. To reduce the risk, carefully review and understand all aspects of this Technical Manual before using the GPS 35LP. When in actual use, carefully compare indications from the GPS 35LP to all
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1. 1 1.1 Overview 1 1.2 1 1.3 Naming Conventions 2 1.4 Technical Specifications 2 1.5 Application 4 2. 5 2.1 Self Test 5 Initialization 5 2.3 Navigation 5 2.4 Satellite Data Collection 6 3. 8 3.1 Dimensions 8 3.2 Options 9 3.3 Connection Wiring Description 4. Software Interface 4.1 4.2 4.3
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INTRODUCTION 1.1 The GARMIN GPS 35LP is a complete GPS receiver, including an embedded antenna, designed for a broad spectrum of OEM (Original Equipment Manufacturer) system applications. Based on the proven technology found in other GARMIN 12 channel GPS receivers, the GPS 35LP will track up to 12 satellites at a time while providing fast time-to-first-fix, one second navigation updates and low power consumption. Its far reaching capability meets the sensitivity requirements of land navigation
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Flexible input voltage levels of 3.6Vdc to 6 .0Vdc with overvoltage protection in the - LVx versions, HVx versions. 1.3 The GPS 35LP Series TrackPack™ receivers are delineated with a three letter extension to designate the operating voltage range and the serial data voltage specification. - GPS35-HVx designation indicates that the unit will accept a high input voltage. The Low Voltage - GPS35-LVx designation indicates that the unit is designed to operated from a low voltage 3.6VDC to 6.0VDC s
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2) : 120 mA typical 140 mA max - LVx versions, 20 870mW typical 1000mW max - 3) : 3V Rechargeable Lithium cell battery, up to 6 month charge. 4) 1) Tracks up to 12 satellites (up to 11 with PPS active) 3) Acquisition time - 45 seconds cold (initial position, time and - 5.0 minutes initial position and time unknown) Differential GPS (DGPS): 5 meters RMS Non-differential GPS: 15 meters RMS (100 meters with Selective Availability on) 5) Velocity accuracy: 0.2 m/s RM
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Fig. 1, TYPICAL APPLICATION ARCHITECTURE 4 1.5 APPLICATION 5) Binary Format Phase Data One-pulse-per-second timing output 4)
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This section describes the basic operational characteristics of the GPS 35LP. Additional information 2.1 SELF TEST After input power has been applied to the GPS 35LP and periodically thereafter, the unit will perform critical self test functions and report the results over the output channel(s). The following tests will be performed: 1) RAM check 2) FLASH memory test 3) Receiver test 4) Real-time clock test 5) Oscillator check In addition to the results of the above tests, the GPS 35L
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1) Latitude/longitude/altitude 2) Velocity 3) Date/time 5) Satellite and receiver status Normally the GPS 35LP will select the optimal navigation mode (2D or 3D) based on available satellites and geometry considerations. The host system, at its option, may command the GPS 35LP to choose a specific mode of navigation, such as 2D. The following modes are available: 1) 2D exclusively with altitude supplied by the host system (altitude hold mode) 2) 3D exclusively with altitude comput
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™ minutes to calculate a navigation solution. , unlike search the sky, does not require that the receiver continue to operate after a fix has been obtained. 7 AutoLocate
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3.1 The GPS 35LP is a complete GPS receiver including antenna in a uniquely styled waterproof package. ± ± 8 Fig. 2 GPS 35LP Dimensions 0.50mm) (General tolerance GPS 35 Dimensions 3.1.1 MECHANICAL DIMENSIONS HARDWARE INTERFACE SECTION 3
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3.2 MOUNTING CONFIGURATIONS AND OPTIONS The following mounting options are available for the GPS 35LP. Mounting is user configurable. The magnetic mount provides a firm, removable mounting attachment to any ferrous metal surface. Fig. 3, Magnetic Mount Attachment 9 3.2.1 Magnetic Mount
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The trunk lip mount provides a semi-permanent attachment to the trunk lip of most automobiles. Fig. 4, Trunk Lip Mount Attachment 10 3.2.2 Trunk Lip Mount
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The suction cup bracket provides a removable mounting surface attached to the inside of a vehicle's Fig. 5, Suction Cup Mount Attachment 11 windshield. 3.2.3 Suction Cup Mount
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The flange mount allows for a permanent installation on a flat surface. This mounting configuration is ideal in applications in which the far side of the mounting surface is inaccessible. Fig. 6, Flange Mount Attachment 12 3.2.4 Flange Mount
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3.3 CONNECTION WIRING DESCRIPTION The GPS 35LP features a stripped and pre-tinned cable assembly for connection flexibility. The following is a functional description of each wire in the cable assembly. Vin - Regulated +3.6V to +6V, 150 mA (maximum) in the - LVx versions. Typical operating current is 120 mA. Transients and overvoltages are protected by an internal 6.8V transient diode and a positive temperature coefficient thermistor. With voltages greater than thermistor, causing it to heat
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Software Interface The GPS 35LP interface protocol design is based on the National Marine Electronics Association’s NMEA 0183 ASCII interface specification, which is fully defined in “NMEA 0183, Version 2.0” (copies may be obtained from NMEA, P.O. Box 50040, Mobile, AL, 36605, USA) and the Radio Technical Commission for Maritime Services’ “RTCM Recommended Standards For Differential GPS (copies may be obtained from RTCM, P.O. Box 19087, Washington, DC, 20036, USA). The GPS 35LP interface prot
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Sensor Initialization Informati on (PGRMI) The $PGRMI sentence provides information used to initialize the sensor board set position and time used for satellite acquisition. Receipt of this sentence by the board set 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 ,<1>,<2>,<3>,<4>,<5>,<6>,<7>*hh<
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All configuration changes take effect after receipt of a valid value except baud rate and PPS mode. Additional Sensor Configuration Information (PGRMC1) The $PGRMC1 sentence provides additional information used to configure the sensor board operation. Configuration parameters are stored in non-volatile memory and retained between power cycles. The GPS 35LP will echo this sentence upon its receipt if no errors are detected. If an error is detected, the echoed PGRMC1 sentence will contain the cu
