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Holux GM-82 User Manual

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GM-82
GPS Engine Board
User's Guide
Jan 02, 2002
HOLUX
Technology Inc.
8F, 26, Tai-Yuen Street, Tai-Yuen Hi-Tech Industrial Park,
Chu Pei City 302, Hinchu, Taiwan.
Phone: +886-3-552-6268 Fax: +886-3-552-6108
E-Mail: info@holux.com.tw Web: www.holux.com.tw
All Right Reserved

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  • Page 1 GM-82 GPS Engine Board User’s Guide Jan 02, 2002 HOLUX Technology Inc. 8F, 26, Tai-Yuen Street, Tai-Yuen Hi-Tech Industrial Park, Chu Pei City 302, Hinchu, Taiwan. Phone: +886-3-552-6268 Fax: +886-3-552-6108 E-Mail: info@holux.com.tw Web: www.holux.com.tw All Right Reserved...

  • Page 2: Table Of Contents

    GM-82 User’s manual TABLE OF CONTENTS 1. Introduction …………………………………………………………………………..…….. 1.1 Overview ………………………………………………………………………………. 1.2 Features …………………………………………………………………………..….. 1.3 Technical Specifications 2. Operational Characteristics 2.1 Initialization …………………………………………………………………………... 2.2 Navigation …………………………………………………………………………… 5 3. Hardware Interface ……………………………………………….……………………….. 3.1 Standard Model 4. Software Interface ………………………………………………….…………………….. 4.1 NMEA Transmitted Sentences 4.2 RTCM Received Data...

  • Page 3: Introduction

    1. Introduction 1.1 Overview The HOLUX GM-82 Engine Board is a total solution GPS receiver, designed based on SiRF star II Architecture. This positioning application meets strict needs such as car navigation, mapping, surveying, agriculture and so on. Only clear view of sky and certain power supply are necessary to the unit.

  • Page 4: Operational Characteristics

    If significant inaccuracy exists in the initial data, or the orbital data is obsolete, it may take more time to achieve a navigation solution. The GM-82 Auto-locate feature is capable of automatically determining a navigation solution without intervention from the host system.

  • Page 5: Navigation

    GM-82 User’s manual 2.2 Navigation After the acquisition process is complete, the GM-82 sends valid navigation information over output channels. These data include: 1) Latitude/longitude/altitude 2) Velocity 3) Date/time 4) Error estimates 5) Satellite and receiver status 2.3 Manufacturing Default: Datum: WGS84.
  • Page 6 TXA: Main Serial Output. This output provides navigation data to user written software. TXB: For user’s application (not currently used). 3. PBRESEN: This pin provides an active-low reset input to the GM-82. Activation of this pin will reset and start acquisition process. It may be left open if not utilized.

  • Page 7: Software Interface

    GM-82 User’s manual 4. Software Interface The GPS-82 interface protocol is based on the National Marine Electronics Association's NMEA 0183 ASCⅡinterface specification, which is defined in NMEA 0183, Version 2.2 and the Radio Technical Commission for Maritime Services (RTCM Recommended Standards For Differential Navstar GPS Service, Version 2.1, RTCM Special Committee No.104).
  • Page 8 GM-82 User’s manual 4.1.2 Geographic Position with Latitude/Longitude(GLL) Table 4-4 contains the values for the following example: $GPGLL,3723.2475,N,12158.3416,W,161229.487,A*2C Table 4-4 GLL Data Format Name Example Message ID $GPGLL Latitude 3723.2475 N/S Indicator Longitude 12158.3416 E/W Indicator UTC Position 161229.487 Status Checksum <CR>...
  • Page 9 GM-82 User’s manual Table 4-8 GSV Data Format Name Example Message ID $GPGSV Number of Messages Message Number Satellites in View Satellite ID Elevation Azimuth SNR (C/No) Satellite ID Elevation Azimuth SNR (C/No) Checksum <CR> <LF> (1). Depending on the number of satellites tracked multiple messages of GSV data may be required.

  • Page 10: Rtcm Received Data

    GM-82 User’s manual Speed Units Checksum <CR> <LF> (1). SiRF Technology Inc. does not support magnetic declination. All “course over ground” data are geodetic WGS84 directions. 4.1.6 MSK Receiver Signal (MSS) Table C-9 contains the values for the following example: $GPMSS,55,27,318.0,100,*66...
  • Page 11 GM-82 User’s manual European 1950 - Iran European 1950 – Italy (Sardinia) European 1950 – Italy (Sicily) European 1950 – Malta European 1950 – Northern Regional Mean International European 1950 – Portugal, Spain European 1950 – Southern Regional Mean International European 1950 –...

  • Page 12: Manufacture Default

    SiRFdemo is the Evaluation Receiver configuration and monitoring software provided with the GM-82. This software can be used to monitor real-time operation of the GM-82 Receiver, log data for analysis, upload new software to the Receiver, and configure the Receiver operation. See setup.pdf for more information on the use and operation of SiRFdemo software.

  • Page 13: Ordering Information

    GM-82 User’s manual 6. Ordering Information 6.1 Products Options Output Model No. Level TTL or RS-232 GM-82-A0X-5 RS-232 GM-82-A0X-3 RS-232 GM-82-A0A-5 RS-232 GM-82-A0A-3 RS-232 GM-82-A1X-5 RS-232 GM-82-A1X-3 RS-232 GM-82-A1A-5 RS-232 GM-82-A1A-3 RS-232 GM-82-T0X-5 GM-82-T0X-3 GM-82-T0A-5 GM-82-T0A-3 GM-82-T1X-5 GM-82-T1X-3 GM-82-T1A-5 GM-82-T1A-3 6.2 Accessories...

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