Holux GM-83 user manual

Summary of the content on the page No. 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

Summary of the content on the page No. 2

GM-83 User’s manual TABLE OF CONTENTS …………………………………………………………………………..…….. 3 1. Introduction 1.1 Overview ………………………………………………………………………………. 3 1.2 Features …………………………………………………………………………..….. 3 1.3 Technical Specifications ………………..……………………………..……………….. 3 ……………………………………….………………….. 4 2. Operational Characteristics 2.1 Initialization …………………………………………………………………………... 4 2.2 Navigation …………………………………………………………………………… 5 ……………………………………………….……………………….. 6 3. Hardware Interface 3.1 Standard Model ……

Summary of the content on the page No. 3

GM-83 User’s manual 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. On

Summary of the content on the page No. 4

GM-83 User’s manual 1.3.4 Performance 1) Tracks up to 12 satellites. 2) Update rate: 1 second. 3) Acquisition time: Reacquisition 0.1 sec, averaged Hot start 8 sec. averaged Warm start 38 sec. averaged Cold start 45 sec. averaged 4) Position accuracy: Non DGPS (Differential GPS) Position 5~25 meter CEP Velocity 0.1 meters/second. Time 1 microsecond synchronized GPS time DGPS (Differential GPS) Position 1 to 5 meters, typical Velocity 0.05 meters/second, typical EGNOS/WAAS Position < 2.

Summary of the content on the page No. 5

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. Baud Rate: 4800. Output: GGA, GSA, GSV, RMC or by demand. DGPS: RTCM SC-104(Type 1,2,9) or WAAS (in USA area) or EGNOS (in European area) 5

Summary of the content on the page No. 6

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 J1 connector pin definition: Pin # Name Description 1 NC No function

Summary of the content on the page No. 7

GM-83 User’s manual Manual reset input, ground to reset receiver. Leave floating for normal 5 PBRESEN operation. The minimum plus width is 150 ms reset signal. 6 GPIO1 General purpose I/O pin 1 7 GPIO2 General purpose I/O pin 2 8 GPIO3 General purpose I/O pin 3 9 GPIO4 General purpose I/O pin 4 10 GND Ground 11 TXA Port A Serial Transmit Data GPS messages. 12 RXA Port A Serial Receive Data GPS commands. 13 GND Ground 14 TXB Port B Serial Transmit Data. 15 RXB Port B Serial Receive Data DGPS mess

Summary of the content on the page No. 8

GM-83 User’s manual 4. Software Interface The GM-83 interface protocol is based on the National Marine Electronics Association's NMEA 0183 ASCinterface specification, which is defined in NMEA 0183, Version 2.2 and

Summary of the content on the page No. 9

GM-83 User’s manual Value Description 0 0 Fix not available or invalid 1 GPS SPS Mode, fix valid 2 Differential GPS, SPS Mode, fix valid 3 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 Table 4-4 GLL Data Format Name Example Units Description Message ID $GPGLL GLL protocol header Latitude 3723.2475 ddmm.mmmm N/S Indicator N N/S Indicator N N=north or S=south Lo

Summary of the content on the page No. 10

GM-83 User’s manual 33D 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 Table 4-8 GSV Data Format Name Example Units Description Message ID $GPGSV GSV protocol header Number of Messages 2 Range 1 to 3 (1) Message Number(1) 1 Range 1 to 3 Satellites in View 07 Satellite ID 07 Channel 1 (Range 1 to 32) Elevation 79 degrees Channel

Summary of the content on the page No. 11

GM-83 User’s manual 4.1.6 Course Over Ground and Ground Speed (VTG) Table 4-10 contains the values for the following example: $GPVTG,309.62,T, ,M,0.13,N,0.2,K*6E Table 4-10 VTG Data Format Name Example Units Description Message ID $GPVTG VTG protocol header Course 309.62 degrees Measured heading Reference T True Course degrees Measured heading Reference M Magnetic(1) Speed 0.13 knots Measured horizontal speed Units N Knots Speed 0.2 km/hr Measured horizontal speed Units K Kilometers per hour Che

Summary of the content on the page No. 12

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 Reference Ellipsoid Data name 1 Adindan - Ethiopia Clarke 1880 Data1.dat 2 Afgooye - Somalia Krassovsky Data2.dat 3 Alaska, Conus –

Summary of the content on the page No. 13

Summary of the content on the page No. 14

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. 14