Garmin GPS 35 LP Technical Specification
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Garmin GPS 35 LP Technical Specification

Garmin GPS 35 LP Technical Specification

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TM
GPS 35/36 TracPak
GPS SMART ANTENNA

TECHNICAL SPECIFICATION

66062 ·
GARMIN · 1200 E. 151st Street · Olathe, Kansas
(913) 397-8200 · (913) 397-8282 FAX

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  • Page 1: Technical Specification

    GPS 35/36 TracPak GPS SMART ANTENNA TECHNICAL SPECIFICATION 66062 · GARMIN · 1200 E. 151st Street · Olathe, Kansas (913) 397-8200 · (913) 397-8282 FAX...
  • Page 2 © 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.
  • Page 3 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.
  • Page 4 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...

  • Page 5: Table Of Contents

    TABLE OF CONTENTS Introduction Overview Features Technical Specifications Application Operational Characteristics Self Test Initialization Navigation Satellite Data Collection Hardware Interface Mechanical Dimensions Mounting Configurations and Options Connection Wiring Description Software Interface NMEA Received Sentences NMEA Transmitted Sentences Baud Rate Selection RTCM Received Data Earth Datums...

  • Page 6: Introduction

    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...

  • Page 7: Features

    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...
  • Page 8 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...

  • Page 9: Application

    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.

  • Page 10: Operational Characteristics

    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).

  • Page 11: Navigation

    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 to achieve a navigation solution.

  • Page 12: Satellite Data Collection

    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/ 3) Automatic mode in which the board set determines the desired mode based on satellite availability and geometry considerations...
  • Page 13 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).

  • Page 14: Hardware Interface

    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)
  • Page 15 3.1.2 GPS 36 Dimensions (General Tolerance ±0.50 mm)

  • Page 16: Mounting Configurations And Options

    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...
  • Page 17 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...
  • Page 18 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...
  • Page 19 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...

  • Page 20: Connection Wiring Description

    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).
  • Page 21 a no load voltage swing of 0.2Vdc to 4.8Vdc. This output normally provides ASCII sentences formatted per “NMEA 0183, Version 2.0” . User selectable baud rates of 1200, 2400, 4800, and 9600 are available. The data output on this pin is identical to the data output on TXD1.

  • Page 22: Software Interface

    NMEA 0183, transmits additional information using the convention of GARMIN proprietary sentences. The following sections describe the data format of each sentence transmitted and received by the GPS 35/36. The baud rate selection and RTCM differential GPS input are also described.
  • Page 23 <14> afo clock parameter <15> af1 clock parameter 4.1.2 Initialization Information ($PGRMI GARMIN proprietary format) The $PGRMI sentence provides information used to initialize the GPS 35/36 set position and time used for satellite acquisition. Receipt of this sentence by the GPS 35/36 causes the software to restart the satellite acquisition process.
  • Page 24 Current UTC time, hhmmss format <7> Acquisition Reset, A = begin autolocate, R = restart acquisition 4.1.3 Configuration Information ($PGRMC GARMIN proprietary format) The $PGRMC sentence provides information used to configure the GPS 35/36 operation. parameters are stored in non-volatile memory and retained between power cycles.
  • Page 25 Null fields in the configuration sentence indicate not change in the particular configuration parameter. 4.1.4 Output Sentence Enable/Disable ($PGRMO GARMIN proprietary format) The $PGRMO sentence provides the ability to enable and disable specific output sentences. The following sentences are enabled at the factory: GPGSA, GPGSV, GPRMC, PGRME, PGRMT and PGRMV.

  • Page 26: Nmea Transmitted Sentences

    1) If the target sentence mode is ‘2’ (disable all) or ‘3’ (enable all), the target sentence description is not checked for validity. In this case, an empty field is allowed (e.g., $PGRMO,,3), or the mode field may contain from 1 to 5 characters. 2) If the target sentence mode is ‘0’...
  • Page 27 Length of transmission = Baud characters_transmitted_per_sec 1200 2400 4800 9600 Sentence max_characters GPGGA GPGSA GPGSV GPRMC GPVTG PGRME PGRMT PGRMV PGRMF LCGLL LCVTG The factory set defaults will result in a once per second transmission at the NMEA specification transmission rate of 4800 baud.
  • Page 28 in “National Institute of Standards and Technology Special Publication 432 (Revised 1990)” (for sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C., 20402, U.S.A.). When a positive leap second is required, the second is inserted beginning at 23h 59m 60s of the last day of a month and ending at 0h 0m 0s of the first day of the following month.
  • Page 29 4.2.4 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 <2> Latitude, ddmm.mmmm format (leading zeros will be transmitted) <3> Latitude hemisphere, N or S <4> Longitude, dddmm.mmmm format (leading zeros will be transmitted) <5>...
  • Page 30 4.2.6 GPS Satellites in View (GSV) $GPGSV,<1>,<2>,<3>,<4>,<5>,<6>,<7>,...<4>,<5>,<6>, <7>*hh<CR><LF> <1> Total number of GSV sentences to be transmitted <2> Number of current GSV sentence <3> Total number of satellites in view, 00 to 12 (leading zeros will be transmitted) <4> Satellite PRN number, 01 to 32 (leading zeros will be transmitted) <5>...
  • Page 31 <9> UTC date of position fix, ddmmyy format <10> Magnetic variation, 000.0 to 180.0 degrees (leading zeros will be transmitted) <11> Magnetic variation direction, E or W (westerly variation adds to true course) 4.2.8 Track Made Good and Ground Speed with GPS Talker ID (GPVTG) The GPVTG sentence reports track and velocity information with a checksum:...
  • Page 32 Estimated horizontal position error (HPE), 0.0 to 9999.9 meters <2> Estimated vertical position error (VPE), 0.0 to 9999.9 meters <3> Estimated position error (EPE), 0.0 to 9999.9 meters 4.2.12 GPS Fix Data Sentence ($PGRMF GARMIN proprietary format) $PGRMF,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,<10>, <11>,<12>,<13>,<14>,<15>,*hh<CR><LF> <1> GPS week number (0-1023) <2>...

  • Page 33: Baud Rate Selection

    <15> Time dilution of precision, 0 to 9 (rounded to nearest integer value) 4.2.13 Sensor Status Information ($PGRMT GARMIN proprietary format) The $PGRMT sentence gives information concerning the status of the GPS 35/36. This sentence is transmitted once per minute regardless of the selected baud rate.

  • Page 34: Rtcm Received Data

    $PGRMV,<1>,<2>,<3>,*hh<CR><LF> <1> True east velocity, -999.9 to 9999.9 meters/second <2> True north velocity, -999.9 to 9999.9 meters/second <3> Up velocity, -999.9 to 9999.9 meters/second 4.3 BAUD RATE SELECTION Baud rate selection can be performed by sending the appropriate configuration sentence to the GPS 35/36 as described in the NMEA Received Sentences Section, sentence $PGRMC.

  • Page 35: Earth Datums

    APPENDIX A EARTH DATUMS The following is a list of the GARMIN GPS 35/36 earth datum indexes and the corresponding earth datum name (including the area of application): ADINDAN - Ethiopia, Mali, Senegal, Sudan AFGOOYE - Somalia AIN EL ABD 1970 - Bahrain Island, Saudi Arabia...
  • Page 36 EASTER ISLAND 1967 - Easter Island EUROPEAN 1950 - Austria, Belgium, Denmark, Finland, France, Germany, Gibraltar, Greece, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland EUROPEAN 1979 - Austria, Finland, Netherlands, Norway, Spain, Sweden, Switzerland FINLAND HAYFORD 1910 - Finland GANDAJIKA BASE - Republic of Maldives GEODETIC DATUM 1949 - New Zealand ORDNANCE SURVEY OF GREAT BRITAIN 1936...
  • Page 37 NORTH AMERICAN 1927 - Central America (Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua) NORTH AMERICAN 1927 - Canal Zone NORTH AMERICAN 1927 - Canada (including Newfoundland Island) NORTH AMERICAN 1927 - Caribbean (Barbados, Caicos Islands, Cuba, Dominican Republic, Grand Cayman, Jamaica, Leeward Islands, Turks Islands) NORTH AMERICAN 1927 - Mean Value (CONUS) NORTH AMERICAN 1927 - Cuba...
  • Page 38 SOUTH AMERICAN 1969 - Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Venezuela, Trinidad and Tobago SOUTH ASIA - Singapore PROVISIONAL SOUTH CHILEAN 1963 - South Chile SANTO (DOS) - Espirito Santo Island SAO BRAZ - Sao Miguel, Santa Maria Islands (Azores) SAPPER HILL 1943 - East Falkland Island SCHWARZECK - Namibia...
  • Page 39 GARMIN Corporation 1200 E. 151st Street Olathe, KS 66062 1-800-800-1020 (913)397-8200 190-00104-00 Rev. D...

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