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Holux GM-83 User Manual

Gps engine board
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GM-83
GPS Engine Board
User's Guide
Jan 02, 2002
Thailand contact:
NavCom Research Co.,Ltd.
84/280 Asiahometown village,Bangkruay-Soinoi rd.,
Sainoi district, Ampher Sainoi,Nontabure 11150
Phone : 662-9237628-29
Fax : 662-92367629
Email :
navcom@navcoms.com

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Summary of Contents for Holux GM-83

  • Page 1 GM-83 GPS Engine Board User’s Guide Jan 02, 2002 Thailand contact: NavCom Research Co.,Ltd. 84/280 Asiahometown village,Bangkruay-Soinoi rd., Sainoi district, Ampher Sainoi,Nontabure 11150 Phone : 662-9237628-29 Fax : 662-92367629 Email : navcom@navcoms.com...

  • Page 2: Table Of Contents

    GM-83 User’s manual 1. Introduction …………………………………………………………………………..…….. 1.1 Overview ………………………………………………………………………………. 1.2 Features …………………………………………………………………………..….. 1.3 Technical Specifications 2. Operational Characteristics 2.1 Initialization …………………………………………………………………………... 2.2 Navigation …………………………………………………………………………… 3. Hardware Interface ……………………………………………….……………………….. 3.1 Standard Model 4. Software Interface ………………………………………………….…………………….. 4.1 NMEA Transmitted Sentences 4.2 RTCM Received Data 5.

  • Page 3: Introduction

    1. Introduction 1.1 Overview The HOLUX GM-83 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    If significant inaccuracy exists in the initial data, or the orbital data is obsolete, it may take more time to achieve a navigation solution.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-83 Auto-locate feature is capable of automatically determining a navigation solution without intervention from the host system.

  • Page 5: Navigation

    GM-83 User’s manual 2.2 Navigation After the acquisition process is complete, the GM-83 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: Hardware Interface

    GM-83 User’s manual 3. Hardware interface 3.1 Standard Model GM-83 GM-83-A W/ angle MCX connector and standard hole to hole dimension Pin # Name VCC_5V VBAT J1 connector pin definition: Description No function Regulated 5.0V +/-5% input power, 160mA typical.
  • Page 7 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-83. Activation of this pin will reset and start acquisition process. It may be left open if not utilized.

  • Page 8: Software Interface

    GM-83 User’s manual 4. Software Interface The GM-83 interface protocol is based on the National Marine Electronics Association's NMEA 0183 ASC interface 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 9 GM-83 User’s manual Value 0 Fix not available or invalid GPS SPS Mode, fix valid Differential GPS, SPS Mode, fix valid GPS PPS Mode, fix valid 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...
  • Page 10 GM-83 User’s manual 4.1.4 GNSS Satellites in View (GSV) Table 4-8 contains the values for the following example: $GPGSV,2,1,07,07,79,048,42,02,51,062,43,26,36,256,42,27,27,138,42*71 $GPGSV,2,2,07,09,23,313,42,04,19,159,41,15,12,041,42*41 Name Message ID Number of Messages Message Number Satellites in View Satellite ID Elevation Azimuth SNR (C/No) Satellite ID Elevation...

  • Page 11: Rtcm Received Data

    The default communication parameters for DGPS Input are 9600 baud, 8 data bits, stop bit, and no parity. Position accuracy of less than 5 meters can be achieved with the GM-83 by using Differential GPS (DGPS) real-time pseudo-range correction data in RTCM SC-104 format, with message types 1,2, or 9. As using DGPS receiver with different communication parameters, GM-83 may decode the data correctly to generate accurate messages and save them in battery-back SRAM for later computing.

  • Page 12: Earth Datums

    GM-83 User’s manual 5. Earth Datums 5.1 Earth Datums The following is a list of the GM-83 earth datum index and the corresponding earth datum name: Item Datum Adindan - Ethiopia Afgooye - Somalia Alaska, Conus – North American 1983 Argentina Bahrain –...

  • Page 13: Manufacture Default

    GM-83 User’s manual Paraguay - South American 1969 South American 1969 Philippines Puerto Rico – Virgin Islands Qatar national Qornoq – Greenland (SOUTH) Reunion – Mascarene Islands Regional Mean Rome 1940 – Italy Saudi Arabia- Ain el Abd 1970 Singapore...

  • Page 14: Ordering Information

    GM-83 User’s manual new software to the Receiver, and configure the Receiver operation. See setup.pdf for more information on the use and operation of SiRFdemo software.

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