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TM
GPS 35/36 TracPak
GPS SMART ANTENNA
TECHNICAL SPECIFICATION
GARMIN· 1200 E. 151st Street · Olathe, Kansas 66062 ·
(913) 397-8200 · (913) 397-8282 FAX
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© 1999 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
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CAUTION The GPS system is operated by the government of the United States which is solely responsible for its accuracy and maintenance. Although the GPS 35/36 is a precision electronic NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted, and therefore become unsafe. Use the GPS 35/36 at your own risk. To reduce the risk, carefully review and understand all aspects of this Technical Manual before using the GPS 35/36. When in actual use, carefully compare indications from the G
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· Connect this device to an outlet on a different circuit than that to which the receiver is connected. · Consult the dealer or an experienced radio/TV technician for help. This device contains no user-serviceable parts. Repairs should only be performed by an authorized GARMIN service center. Unauthorized repairs or modifications to this device could void your warranty and your authority to operate this device under Part 15 regulations.
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TABLE OF CONTENTS 1. Introduction 1 1.1 Overview 1 1.2 Features 2 1.3 Technical Specifications 2 1.4 Application 4 2. Operational Characteristics 5 2.1 Self Test 5 2.2 Initialization 5 2.3 Navigation 6 2.4 Satellite Data Collection 7 3. Hardware Interface 9 3.1 Mechanical Dimensions 9 3.2 Mounting Configurations and Options 11 3.3 Connection Wiring Description 15 4. Software Interface 17 4.1 NMEA Received Sentences 17 4.2 NMEA Transmitted Sentences 21 4.3 Baud Rate Selection 28 4.4 RTCM Received
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SECTION 1 INTRODUCTION 1.1 OVERVIEW The GARMIN GPS 35/36 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 35/36 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 requireme
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such as keyboards and displays are added by the application designer. 1.2 FEATURES The GPS 35/36 provides a host of features that make it easy to integrate and use. 1) Full navigation accuracy provided by Standard Positioning Service (SPS) 2) Compact design ideal for applications with minimal space 3) High performance receiver tracks up to 12 satellites while providing fast first fix and low power consumption 4) Differential capability utilizes real-time RTCM corrections producing 3-10 meter pos
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1.3.2 Environmental Characteristics 1) Operating temperature: -30°C to +85°C (internal temperature) 2) Storage temperature: -40°C to +90°C 1.3.3 Electrical Characteristics 1) Input voltage: 10 to 30 VDC, unregulated. 2) Typically draws 150 mA @ 12 VDC 3) Backup power: Internal 3V Lithium coin cell battery, up to 10 year life 1.3.4 Performance 1) Tracks up to 12 satellites 2) Update rate: 1 second 3) Acquisition time - 15 seconds warm (all data known) - 45 seconds cold (initial position, tim
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1.3.5 Interfaces 1) Dual channel RS-232 compatible with user selectable baud rate (1200, 2400, 4800, 9600) 2) NMEA 0183 Version 2.0 ASCII output (GPALM, GPGGA, GPGSA, GPGSV, GPRMC, GPVTG, PGRME, PGRMT, PGRMV, PGRMF, LCGLL, LCVTG) Inputs - Initial position, date and time (not required) - Earth datum and differential mode configuration command, almanac. Outputs - Position, velocity and time - Receiver and satellite status - Differential Reference Station ID and RTCM Data age - Geometry and error e
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SECTION 2 OPERATIONAL CHARACTERISTICS This section describes the basic operational characteristics of the GPS 35/36. Additional information regarding input and output specifications are contained in Section 4. 2.1 SELF TEST After input power has been applied to the GPS 35/36 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) ROM test 3) Receiver test 4) Real-ti
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Like all GPS receivers, the GPS 35/36 utilizes initial data such as last stored position, date and time as well as satellite orbital data to achieve maximum acquisition performance. If significant inaccuracy exists in the initial data, or if the orbital data is obsolete, it may take 5.0 minutes TM to achieve a navigation solution. The GPS 35/36 Autolocate feature is capable of automatically determining a navigation solution without intervention from the host system. However, acquisition perfo
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the GPS 35/36 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 computed by the GPS 35/ 36 3) Automatic mode in which the board set determines the desired mode based on satellite availability and geometry considerations When navigating in the 2D mode (either exclusive or automatic), the GPS 35/36 utilizes the last computed altitude or the last al
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fully automatic and, under normal circumstances, will take about 5 minutes to achieve a navigation solution. However, the host system should allow the GPS 35/ 36 to remain on for at least 12.5 minutes after the first satellite is acquired (see Section 4 for more information on status indications). 2) If the internal memory backup battery fails or is not installed while the host system power is off and not connected to standby power, the GPS 35/36 will search the sky as described above. The syst
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SECTION 3 HARDWARE INTERFACE 3.1 MECHANICAL DIMENSIONS The GPS 35 is a complete GPS receiver including antenna in a uniquely styled waterproof package. 3.1.1 GPS 35 Dimensions (General Tolerance ±0.50 mm) 9
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3.1.2 GPS 36 Dimensions (General Tolerance ±0.50 mm) 10
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3.2 MOUNTING CONFIGURATIONS AND OPTIONS The following mounting options are available for the GPS 35. Mounting is user configurable. 3.2.1 Magnetic Mount The magnetic mount provides a firm, removable mounting attachment to any ferrous metal surface. GPS 35 ONLY 11
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3.2.2 Trunk Lip Mount The trunk lip mount provides a semi-permanent attachment to the trunk lip of most automobiles. GPS 35 ONLY 12
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3.2.3 Suction Cup Mount The suction cup bracket provides a removable mounting surface attached to the inside of a vehicle's windshield. GPS 35 ONLY 13
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3.2.4 Flange Mount 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. GPS 35 ONLY 14
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3.3 CONNECTION WIRING DESCRIPTION The GPS 35/36 features a stripped and pre-tinned cable assembly for the greatest connection flexibility. The following is a functional description of each wire in the cable assembly. Red: VIN - Unregulated 10 - 30VDC 200 mA (maximum). Typical operating current is 150 mA. Black: GND - Power and Signal Ground White: TXD1 - First Serial Asynchronous Output. RS-232 compatible electrical specification. This output normally provides serial data which is formatted pe
