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Resumen del manual
i LR9123 Specifications Sheet Rev. 1.0 1. Introduction Leadtek LR 9123 is a high performance, low power consumption, small size, easily integrated GPS module board designed for a broad spectrum of OEM system applications. This product is based on SiRFstarIII/LPx single chipset solution. Leadtek LR9123 module board is very fit to the customers who devote themselves to AVL system integration and location-based service. The LR9123 design utilizes the latest surface mount technology and high level circuit integration to achieve superior performance while minimizing space and power requirements. This hardware capability combined with software intelligence makes the board easy to be integrated and used in all kinds of navigation applications or products. The application system may communicate with the module board set via two RS232 compatible bi-directional communication channels with CMOS/TTL voltage level. 2. Features 2.1 Hardware and Software Based on the high performance features of the SiRFstarIII/LPx single chipset Compact module size for easy integration: 36x24x10.5mm (1.417”x0.945”x0.413”) 20 channels “All-in-View” tracking Hardware compatible with SiRF GSW software RoHS compliance 2.2 Physical Characteristics Length 36 mm (1.417 in) Width 24 mm (0.945 in) Height 10.50 mm (0.413 in) Weight 7g Antenna connector MMCX type Interface connector 20-pin straight header, 0.8mm pitch board-to-board © 2009 Leadtek Research Inc. All rights reserved. Page 1/9 Leadtek Confidential - Information is subject to change without prior notice. LR9123 Specifications Sheet Rev. 1.0 2.3 Performance Cold/Warm/Hot Start Time: 35/35/1 sec. at open sky and stationary environments. Reacquisition Time: 0.1 second RF Metal Shield for best performance in noisy environments Multi-path Mitigation Hardware 2.4 Interface TTL level serial port for GPS communications interface Protocol: NMEA-0183/SiRF Binary (default NMEA) Baud Rate: 4800, 9600, 19200, 38400 or 57600 bps (default 4800) 2.5 Applications Car Navigation Marine Navigation Fleet Management AVL and Location-Based Services Hand-Held Device for Personal Positioning and Navigation Ideal for PDA, Pocket PC and Other Computing Devices at GPS Application © 2009 Leadtek Research Inc. All rights reserved. Page 2/9 Leadtek Confidential - Information is subject to change without prior notice. LR9123 Specifications Sheet Rev. 1.0 3. Specifications 3.1 Technical Specifications Feature Item Description Chipset GSC3f SiRFstarIII Low power single chipset Frequency L1, 1575.42 MHz C/A code 1.023 MHz chip rate General Channels 20 Accuracy Position 10 meters, 2D RMS 5 meters 2D RMS, WAAS corrected <5meters (50%) Velocity 0.1 meters/second Time 1 microsecond synchronized to GPS time Datum Default WGS-84 Other selectable for other Datum Time to First Fix Reacquisition 0.1 sec., average (TTFF) Snap start 1 sec., average (Open Sky & Hot start 1 sec., average typical TTFF Stationary Warm start 35 sec., average typical TTFF Requirements) Cold start 35 sec., average typical TTFF Power Main power input 3.3 ~ 5.0 VDC input Power TBD consumption Supply Current TBD Backup Power 1.5 ~ 5.0 VDC input. Serial Port Electrical interface Two full duplex serial TTL interface. Protocol messages NMEA-0183@4800 bps (Default) Time-1PPS Level TTL Pulse Pulse duration The 1PPS pulse width is 1 .s, this 1PPS is NOT suited to steer various oscillators (timing receivers, telecommunications system, etc). Time reference At the pulse positive edge. Measurement Aligned to GPS second, ±1 microsecond Altitude 18,000 meters (60,000 feet) max. Velocity 515 meters/second (1000 knots) max. Acceleration 4g, max. Dynamic Conditions Jerk 20 meters/second3, max. © 2009 Leadtek Research Inc. All rights reserved. Page 3/9 Leadtek Confidential - Information is subject to change without prior notice. LR9123 Specifications Sheet Rev. 1.0 3.2 Environmental Characteristics Items Description Operating temperature -40 deg. C to +85 deg. C range Storage temperature range -55 deg. C to +100 deg. C 3.3 Physical Characteristics Items Description Length 36 mm ± 0.3mm (1.417in) Width 24 mm ± 0.3mm (0.945 in) Height 10.5 mm ± 0.3mm (0.413 in) Weight 7g 3.4 Interface Specifications Items Description I/O 20 pin SMD micro package 3.5 Recommended GPS Antenna specifications Parameter Specification Antenna Type Right-hand circular polarized active patch antenna Frequency Range 1575.42 ± 1.023 MHz Impedance 50 Ohm LNA Gain 18dB~28dB Noise Figure 1.5dB Max. Antenna connector type MMCX Antenna Voltage DC 3V Antenna Current 20mA Max. © 2009 Leadtek Research Inc. All rights reserved. Page 4/9 Leadtek Confidential - Information is subject to change without prior notice. LR9123 Specifications Sheet Rev. 1.0 3.6 Software The Leadtek LR9123 module includes SiRF high sensitivity software solution. Features include: High tracking sensitivity High configurability 1 Hz position update rate Real-time Operating System (RTOS) friendly Capable of outputting both NMEA and SiRF-p...