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GM-83 User’s manual
3
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.
GM-83 communicates with other electronic utilities via compatible dual-channel through RS-232 or TTL
and saves critical satellite data by built–in memory backup. With low power consumption, the GM-83 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-83 provides a host of features that make it easy for integration and use.
z SiRF Star II chipset with embedded ARM7TDMI CPU available for customized applications in
firmware•
z 12 parallel satellite-tracking channels for fast acquisition and reacquisition•
z High speed signal acquisition using 1920 time/frequency search channels•
z Built-in WAAS/EGNOS Demodulator•
z Support U.S. Coast Guard DGPS beacon signal•
z Low power consumption with Advanced Trickle-Power and Push-To-Fix mode••
z Optional Rechargeable battery for memory and RTC backup and for fast Time to First Fix(TTFF)•
z Support NMEA0183 v2.2 data protocol and SiRF binary code•
z Enhanced algorithms -SnapLock and SnapStart provide superior navigation performance in urban,
canyon and foliage environments•
z 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: 40.6(W) x 71.1(D) x 9.1(H) (mm) (The height of pin is excluded)
2) Weight: 18 g
1.3.2 Environmental Characteristics
1) Operating temperature: -40
o
C to +85
o
C (internal temperature)
2) Storage temperature: -45
o
C to +100
o
C
1.3.3 Electrical Characteristics
1) Input voltage: 5.0Vdc +/-10% or 3.3Vdc +/- 10%.
2) Backup power:(optional)•3V Rechargeable Lithium cell battery, up to 1000 hours discharge.
3) MCX antenna connector: Active or patch.