Rikaline GPS-20 GPS Engine Board SiRF Star II V1.0 Aug 09, 2002 User’s Guide Rikaline Marketing Corp. 5F-1, 125, RooseveltRd., Sec. 5, Taipei 116, Taiwan, R.O.C. Phone: +886-2-2934-5456 Fax: +886-2-2934-4373 E-Mail: info@rikaline.com.tw Web: www.rikaline.com.
GPS-20 Operating Manual Rikaline TABLE OF CONTENTS 1. Introduction ……………………………………………………………………………………….. 1.1 Overview …………………………………………………………………………………….. 1.2 Features …………………………………………………………………………………….. 1.3 Technical Specifications ……………………………………………………………….. 3 3 3 3 2. Operational Characteristics ……………………………………………………………….… 2.1 Initialization …………………………………………………………………………………. 2.2 Navigation …………………………………………………………………………………. 5 5 5 3. Hardware Interface ………………………………………………………………………….…… 3.
GPS-20 Operating Manual Rikaline 1. Introduction 1.1 Overview The Rikaline GPS-20 GPS Engine Board is a total solution GPS receiver, designed based on SiRF Star II Architecture and pin to pin compatible with SiRF Start I engine board for replacing the system existing in the market using SiRF Start I. This positioning application meets strict needs such as car navigation, mapping, surveying, security, agriculture and so on. Only clear view of sky and certain power supply are necessary to the unit.
Rikaline GPS-20 Operating Manual 1.3.3.2 Power GPS-20 5V Version GPS-20 3.3V Version TTL TTL Main Power Supply Current Backup Power Backup Current Packup Period +5VDC±5% 170mA Typical +2.5V to 3.3V 10µA Typical 230hr (9.6 days) 3.3VDC±10% 170mA Typical +2.5V to 3.3V 10µA Typical 230hr (9.6 days) 1.3.3.3 Datum WGS 84 1.3.4 Performance 1.3.4.1 Acquisition 1) Tracks up to 12 satellites. 2) Update rate: 1 second. 3) Acquisition time Reacquisition 0.1 sec.
GPS-20 Operating Manual 1.3.5.3 Rikaline DGPS Protocol Real-time Differential Correction input (RTCM SC-104 version 2.00 message types 1, 5 and 9). 2. Operational characteristics 2.1 Initialization As soon as the initial self-test is complete, the GPS-20 begins the process of satellite acquisition and tracking automatically. Under normal circumstances, it takes approximately 45 seconds to achieve a position fix, 38 seconds if ephemeris data is known.
GPS-20 Operating Manual Rikaline 3. Hardware interface 3.1 Connectors 3.1.1 Antenna Connector MCX, RSMA 3.1.2 Interface Connector 20-Pin and 10-Pin straight header, 2mm pitch 3.
GPS-20 Operating Manual Rikaline 2) Pulled low (GND) through on-board 100K Ohm resister. 3.2.1 VCC_5V (+5V DC Power Input) This is the main DC power supply for a +5V-powered board. (Required for the GPS-20 5V version) 3.2.2 VCC_3V (+3.3V DC Power Input) This is the main DC power supply for a +3.3V-powered board. (Required for 3.3V version) 3.2.3 ANT_PWR DC voltage for an active antenna. This voltage is not required for operation with a passive antenna.
Rikaline GPS-20 Operating Manual on. To achieve the faster start-up offered by a hot start or warm start, either a battery backup input must be connected or a recharge battery installed . Table 1-3 Backup Battery Voltage Range Board GPS-20 MIN 2.5 MAX 3.3 With a 3.3V Lithium-Ion (2.3mAh) rechargeable .To maximize battery lifetime (3~5 years), the battery voltage should not exceed 3.3V. 3.2.
Rikaline GPS-20 Operating Manual Tracking CPU Trickle 220 360 420 170 33 0.55 160 29 0.55 Note: Table 1-4 does not include the external antenna power, which must be controlled from the system power supply. 3.4 Push-to-Fix Description The purpose of Push-to-Fix mode is to support applications where a position fix is only required when requested by the user (or the application). To support this, the board is left in the Trikle state until commanded to generate a fix. 3.4.
GPS-20 Operating Manual Rikaline 3.6 Mechanical Drawing 3.6.1 Top View 3.6.2 Lateral View 3.6.3 Connector Model: GPS9540 Straight MCX 0 0 1 0 8 0 0.80 0 7 5 5.00 4.00 10.00 10 5.70 Rikaline Marketing Corp. 5F-1, 125, Roosevelt Road, Sec. 5, Taipei, Taiwan 116 Tel: ++886 2 2934 5456 Fax: ++886 2 2934 4373 E-Mail: info@rikaline.com.tw web: www.rikaline.com.
GPS-20 Operating Manual Rikaline 4. Software Interface 4.1 NMEA Transmitted Messages The GPS-20 supported by SiRF Technology Inc. also outputs data in NMEA-0183 format as defined by the National Marine Electronics Association (NMEA), Standard. The default communication parameters for NMEA output are 4800 baud, 8 data bits, stop bit, and no parity.
GPS-20 Operating Manual Rikaline 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 N Longitude 12158.3416 E/W Indicator W UTC Position 161229.487 Status A Checksum *2C Units Description GLL protocol header ddmm.mmmm N=north or S=south dddmm.mmmm E=east or W=west hhmmss.
GPS-20 Operating Manual Rikaline $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 Message ID $GPGSV Number of Messages 2 Message Number 1 Satellites in View 07 Satellite ID 07 Elevation 79 Azimuth 048 SNR (C/No) 42 .... ....
GPS-20 Operating Manual Name Message ID Course Reference Course Reference Speed Units Speed Units Checksum Example $GPVTG 309.62 T M 0.13 N 0.2 K *6E Rikaline Units Description VTG protocol header Degrees Measured heading True Degrees Measured heading Magnetic (1) Knots Measured horizontal speed Knots Km/hr Measured horizontal speed Kilometers per hour End of message termination (1) SiRF Technology Inc. does not support magnetic declination.
GPS-20 Operating Manual Rikaline 5. Earth Datums 5.
GPS-20 Operating Manual 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 Poland – S-42 (Pulkovo 1942) Potsdam Puerto Rico – Virgin Islands Qatar national Qornoq – Greenland (SOUTH) Regional Mean Reunion – Mascarene Islands Romania – S-42 (Pulkovo 1942) Rome 1940 – Italy Saudi Arabia – Ain el Abd 1970 Singapore South Africa Thailand 1975 Tokyo_Japan Tokyo_Korea Tokyo_Mean Tokyo_Okinawa Trinidad, Tobago Venezuela Venezuela – Provisional American 1956 WGS84 Krassovsky 1940 Bessel 1841 Clarke 18
GPS-20 Operating Manual Rikaline 6. Ordering Information 6.1 Product Options 6.1.1 Input Power GPS-20-5: 5V (Standard: TTL level, No backup battery) GPS-20-3: 3.3V (Standard: TTL level, No backup battery) 6.2 Accessories A-10302 Active Antenna, 2-Meter, MCX straight connector A-10302-A Active Antenna, 2-Meter, MCX 90° connector A-10305 Active Antenna, 5-Meter, MCX straight connector A-10305-A Active Antenna, 5-Meter, MCX 90° connector Active Antenna with other connector is produced on demand. 7.
