User manual HOLUX GM-82

[. . . ] 3 1. 3. 5 Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operational characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. 1 Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. 2 Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Introduction 1. 1 Overview The HOLUX GM-82 Engine Board is a total solution GPS receiver, designed based on SiRF star II/LP 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. GM-82 communicates with other electronic utilities via compatible dual-channel through RS-232 or TTL and saves critical satellite data by built­in memory backup. With low power consumption, the GM-82 tracks up to 12 satellites at a time, re-acquires satellite signals in 100 ms and updates position data every second. Trickle-Power allows the unit operates a fraction of the time and Push-to-Fix permits user to have a quick position fix even though the receiver usually stays off. 1. 2 Features The GM-82 provides a host of features that make it easy for integration and use. SiRF Star II/LP chipset with embedded ARM7TDMI CPU available for customized applications in firmware 12 parallel satellite-tracking channels for fast acquisition and reacquisition High speed signal acquisition using 1920 time/frequency search channels Built-in WAAS/EGNOS Demodulator Low power consumption with Advanced Trickle-Power and Push-To-Fix mode Optional Rechargeable battery for memory and RTC backup and for fast Time To First Fix(TTFF) Support NMEA0183 v2. 2 data protocol and SiRF binary code Enhanced algorithms -SnapLock and SnapStart provide superior navigation performance in urban, canyon and foliage environments For Car Navigation , Marine Navigation , Fleet Management , AVL and Location-Based Services , Auto Pilot , Personal Navigation or touring devices, Tracking devices/systems and Mapping devices application 1. 3 Technology Specifications 1. 3. 1 Physical Dimension 1) PCB Size: 40(W) x 50(D) x 12(H) (mm) 2) Weight: 18 g 1. 3. 2 Environmental Characteristics 1) Operating temperature: -40oC to +85oC (internal temperature) 2) Storage temperature: -45oC to +100oC 1. 3. 3 Electrical Characteristics 1) 2) 3) 4) Input voltage: 5. 0Vdc +/-10% or 3. 3Vdc +/- 10%. Input current: Less than 80mA (without antenna ) Backup power:(optional). MCX antenna connector: Active . 1. 3. 4 Performance 1) Tracks up to 12 satellites. 3) Acquisition time: Reacquisition Hot start Warm start Cold start 4) Position accuracy: Non DGPS (Differential GPS) Position 5~25 Velocity 0. 1 Time 1 DGPS (Differential GPS) Position Velocity EGNOS/WAAS Position 5) Dynamic Conditions: Altitude Velocity Acceleration Jerk 18, 000 515 4 20 meters(60, 000 feet) max meters/second (700 knots) max G, max meters/second³, max 1 to 5 0. 05 < 2. 2 <5 meter CEP meters/second. microsecond synchronized GPS time meters, typical meters/second, typical meters, horizontal 95% of time meters, vertical 95% of time 0. 1 8 38 45 sec, averaged sec. averaged 1. 3. 5 Interfaces 1) Dual communication channel TTL or RS232 levels, with user selectable baud rate (4800-Default, 9600, 19200, 38400). 2) NMEA 0183 Version 2. 2 ASCII output (GGA, GSA, GSV, RMC (VTG and GLL for optional)). 3) Real-time Differential Correction input (RTCM SC-104 message types 1, 2 and 9). 2. Operational characteristics 2. 1 Initialization As soon as the initial self-test is complete, the GM-82 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. After a position fix has been calculated, information about valid position, velocity and time is transmitted over the output channel. The GM-82 utilizes initial data, such as last stored position, date, time and satellite orbital data, to achieve maximum acquisition performance. 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. However, acquisition performance can be improved as the host system initializes the GM-82 in the following situation: Moving further than 500 kilometers. Failure of Data storage due to the inactive internal memory battery. 4 GM-82 User's manual 2. 2 Navigation After the acquisition process is complete, the GM-82 sends valid navigation information over output channels. [. . . ] Manufacturing Default: Parameter Input Protocol Output Protocol Baud Rate Parity None Stop Bits Data Bits Datum: Protocol Com A Com B NMEA Binary RTCM SC-104 NMEA Binary None 4800 9600 None 1 1 8 8 WGS84. GGA, GSA, GSV, RMC or by demand. 5. 2. 1 Setting Syntax Datum change syntax: >DOS\Sirfprog /Fdataxx. dat ­Px ­Bx ­Csh1 -Px: x is com port, 1= COM1 2 = COM2 -Bx: Baud rate, 4800, 9600, 19200 or 38400 Example: Change Datum to WGS84, Sirfprog /Fdata58. dat ­P1 ­B4800 ­Csh1 <Entry> After change datum, the new datum will keep in SRAM. If long time (more than 20 days) no power supplied to GM82, user must resend datum to GM82 when power on. 5. 2. 2 Addition Software 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. [. . . ]