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HOLUX
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1. Introduction
1.1 Overview
The HOLUX GR-213 Smart GPS Receiver is a total solution GPS receiver, designed based on SiRF Star III
Architecture. 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. It
communicates with other electronic utilities via compatible dual-channel through RS-232 or TTL and saves
critical satellite data by built–in backup memory. With low power consumption, the GR-213 tracks up to 20
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 GR-213 provides a host of features that make it easy for integration and use.
1. SiRFstarIII chipset with embedded ARM7TDMI CPU available for customized applications in firmware。
2. High performance receiver tracks up to 20 satellites while providing first fast fix and low power
consumption.
3. Differential capability utilizes real-time RTCM corrections producing 1-5 meter position accuracy.
4. Compact design ideal for applications with minimal space.
5. A rechargeable battery sustains internal clock and memory. The battery is recharged during normal
operation.
6. User initialization is not required.
7. Dual communication channels and user selectable baud rates allow maximum interface capability and
flexibility.
8. Optional communication levels, RS-232 and TTL meet ordinary application and new fashions of connecting
PDA with TTL or RS-232 output.
9. FLASH based program memory: New software revisions upgradeable through serial interface.
10. LED display status: The LED provides users visible positioning status. LED “ON” when power connected
and “BLINKING” when GR-213 got positioned.
11. Built-in WAAS Demodulator.
12. Water proof design for industry standard.
1.3 Technology specifications
1.3.1 Physical Dimension
Single construction integrated antenna/receiver.
Size: 64.5 x 42 x 17.8 (mm)
2.54" x 1.65 x 0.7 (Inch).
1.3.2 Environmental Characteristics
1) Operating temperature: -40
o
C to +80
o
C(internal temperature).
2) Storage temperature: -45
o
C to +100
o
C.
1.3.3 Electrical Characteristics
1) Input voltage: +4.5 ~ 5.5 VDC without accessories.
2) Backup power: 3V Rechargeable Lithium cell battery, up to 500 hours discharge.
1.3.4 Performance
1) Tracks up to 20 satellites.
2) Update rate: 1 second.
3) Acquisition time
Reacquisition 0.1 sec., averaged
Hot start 1 sec., averaged
Warm start 38 sec., averaged