达伽马 GPS导航设备-S-87说明书.pdf

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GPS Engine Board Manual S-87V/S-87H SiRF StarⅢ V 1.2 Made in Taiwan

Specifications subject to change without notice! Contents 1. Introduction ……………………………………………………..…………. 2 1.1 Overview …………………………………………………………………. 2 2. Technical Specifications …………………………………………………… 3 2.1. Electrical Characteristics…………………………………………………. 3 2.2. Environmental Characteristics……………………………………..……… 4 2.3. Physical Characteristics……………………………………………...…..… 5 3. Applications ……………………………………………………………… 7 4. Operation and Test (optional)………………..…………… 7 Appendix: Antenna Status sentence …………………………………….. 8 Appendix: Software Specifications …………………………………….. 9 1 S-87 GPS Engine Board Manual

1. Introduction 1.1. Overview Product Introduction The DAGAMA S-87 series GPS modules incorporates high sensitivity, high performance SiRF StarⅢ chipset solution in a compact design. The module tracks up to 20 satellites at a time while offering fast time-to-first-fix and 1Hz navigation update. The unit is very suitable for broad applications such as Handheld, PDA, PPC or other battery operated navigation system. Main Features ■ High sensitivity SiRF StarⅢ chipsets. ■ High performance receiver tracks up to 20 satellites. ■ TTL output for GPS command interface. ■ Low power consumption. ■ Average Cold Start time under 42 seconds. ■ On-chip 1Mb SRAM. ■ Reacquisition time 0.1 second. ■ Support accurate 1PPS output signal aligned with GPS timing. ■ Support Standard NMEA-0183 and SiRF Binary protocol. ■ Multi-path mitigation hardware. ■ Built-in a lithium battery enables fast positioning. ■ Compact size (25.4×25.4×7 mm3) for easy integration into hand-held devices. The S-87 design utilizes the latest surface mount technology and high level circuit integration to achieve superior performance while minimizing dimension and power consumption. 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 module communicates with application system via RS232 (TTL level) with NMEA-0183 protocol. Ordering information: S-87V-P, Vertical MMCX input with 1PPS Time mark output S-87V-R, Vertical MMCX input with Reset Input S-87V-S, Vertical MMCX input with GPS status indication S-87H-P, Horizontal MMCX input with 1PPS Time mark output S-87H-R, Horizontal MMCX input with Reset Input S-87H-S, Horizontal MMCX input with GPS status indication 2 S-87 GPS Engine Board Manual

2. Technical Specifications 2.1. Electrical Characteristics 2.1.1 General Frequency C/A code Channels L1, 1575.42 MHz 1.023 MHz chip rate 20 channels all in view tracking 2.1.2 Sensitivity Tracking 2.1.3 Accuracy (Open Sky) -159 dBm typical Position Time 2.1.4 Datum Default 2.1.5 Acquisition Rate Hot start Warm start Cold start Reacquisition 2.1.6 Dynamic Conditions Altitude Velocity Acceleration Jerk 2.1.7 Power Main power input Supply Current Backup Power < 10 meters, 2D RMS < 7 meters 2D RMS, WAAS corrected 1-5 meters, DGPS corrected 1 microsecond synchronized to GPS time WGS-84 1 sec, average 38 sec, average 42 sec, average 0.1 sec, average < 18,000 meters (60,000 feet) < 515 meters/sec (1000 knots) < 4 G 20 meters/sec max 3.0 ~ 5.5 VDC input. < 80 mA 3V rechargeable Lithium battery, up to 500 hours discharge 3 S-87 GPS Engine Board Manual

2.1.8 RF Interface Antenna connector type MMCX 2.1.9 Serial Port Electrical interface Protocol message Default NMEA Two full duplex serial communication, via RS232, TTL interface. NMEA-0183. GGA, GSA, GSV, RMC, (GLL, VTG, and ZDA optional). 4800 baud rate (other rate optional). 8 bits data, 1 stop bit, no parity. Antenna Status sentence ZANTAX (Optional) 2.1.10 Time 1PPS Pulse, Pulse duration 1μs. Time reference at the pulse positive edge. Synchronized to GPS time, ± 1μs. < 8g 2.1.11 Weight 2.1.12 Recommended External Antenna Specification Gain Noise figure Current Operating Voltage 20 dB min (cable loss included) 1.5 dB typical 10 mA typical Confirmed to spec 3.3 ~ 5.5 V Survival 3.0 ~ 3.3 V 2.2. Environmental Characteristics Operating temperature range Storage temperature range -40 oC to +85 oC -45 oC to +100 oC 4 S-87 GPS Engine Board Manual

2.3. Physical Characteristics Mechanical Outline S-87V outline 5 S-87 GPS Engine Board Manual

S-87H outline Unit : mm Pin assignment Pin1 Pin2 Pin3 Pin4 Pin5 Pin6 VDD UART Tx UART Rx NC GND TIMEMARK/ RESET/ GPS STATUS 3.0 ~ 5.5 VDC input NMEA serial data output Serial data input Not connect, must be floating for normal operation Ground TIMEMARK: 1PPS Time mark output (Pulse duration 1μs)/ RESET: Reset Input (Active Low)/ For GPS status (LED) indication 6 S-87 GPS Engine Board Manual

3. Applications The S-87 series engine module is a high performance, ultra low power consumption, GPS receiver. Applications are as follows: Car Navigation Wrist Watch Solar Operated Device Marine Navigation Fleet Management AVL and Location-Based Services Radar detector with GPS function Hand-Held Device for Personal Positioning and Navigation Ideal for PDA, Pocket PC and Other Computing Devices at GPS Application 4. Operation and Test (optional) The customers can change the data protocol and communication data baud rate for their applications using a GPS Viewer software. Installing appropriate viewer program to host device, you may check the status of the GPS receiver whenever you like to. Following are standard buttons and operation steps. (a) Execute the Viewer program. Press the “COM” button to set “Com Port” for this data link and “Baud Rate” to 4800. (b) Click “OPEN” to download the received data. Usually one window shows the NMEA format data stream and another window shows tracked satellite constellation and signal quality status. (c) Once the link is successful, click “CLOSE” button to exit the program. However, you may click the “Cold” button to perform “cold start” testing. 7 S-87 GPS Engine Board Manual

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