EverMore GM-R900 Manual de usuario
GM-R900 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw
1
GM-R900
GPS Receiver User’s Manual
EverMoreTechnologyInc.
GM-R900 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw
2
Manual Revision History
Revision Date Update Summary
Issue 1.0 March 2006 Initial release
© EverMore Technology Inc. All rights reserved.
Not to be reproduced in whole or part for any purpose without written permission of EverMore Technology Inc.
Information provided by EverMore Technology Inc. is believed to be accurate and reliable. However, no
responsibility is assumed by EverMore Technology Inc. for its use. EverMore Technology Inc. reserves the right to
change specification at any time without notice.
GM-R900 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw
3
Contents
1. INTRODUCTION............................................................................................... 5
1.1 Overview .............................................................................................................................5
1.2 Features...............................................................................................................................6
1.3 Applications.........................................................................................................................6
1.4 Start-up Modes ...................................................................................................................7
2. TECHNICAL SPECIFICATIONS................................................................... 8
2.1 Electrical Characteristics ..................................................................................................8
2.2 Environmental Characteristics.........................................................................................9
2.3 Physical Characteristics.....................................................................................................9
3. HARDWARE INTERFACE ........................................................................... 10
3.1 GM-R900 PS/2 Female Connector (standard type)......................................................10
3.2 GM-R900 Female PS/2 Connector Interface................................................................. 11
3.3 GM-R900 Accessories ......................................................................................................12
3.3.1 DB9 9 Pins Female and PS/2 Male Connector ..................................................................12
3.3.2 USB Connector .............................................................................................................. 13
3.4 GM-R900 Dimensions......................................................................................................14
3.5 GM-R900 Appearance Diagram.....................................................................................14
GM-R900 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw
4
4 GM-R900 USB DRIVER INSTALLATION.................................................. 15
5. GPS TESTING................................................................................................. 16
6. LIMITED WARRANTY................................................................................... 17
7. APPENDIX........................................................................................................ 17
8. ORDERING INFORMATION........................................................................ 18
8.1 Optional Types Cable.......................................................................................................18
8.1.1 Male PS/2 Cable.............................................................................................................18
8.1.2 SP6P Cable ....................................................................................................................19
8.1.3 RS-232 Cable (DB9 9 Pins Female + PS/2 Male)..............................................................20
8.1.4 USB Cable (With USB Bridge Controller IC)...................................................................21
8.2 Car Charger List ..............................................................................................................22
9. SERIES PRODUCTS INFORMATION....................................................... 23
GM-R900 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw
5
1. Introduction
1.1 Overview
EverMore GM-R900 series is a high sensitivity GPS receiver, This product is based on SiRF starIII
chipset in 20 channel GPS receivers solution. The GPS module receiver will track up to 20 satellites at
a time while providing fast time-to-first-fix and 1Hz navigation updates. It is far reaching capability
meets the sensitivity & accuracy requirements of car navigation as well as other location-based
applications, such asAVL system. PDA, Notebook operated navigation system.
The GM-R900 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
RS-232 level with NMEA-0183 protocol.
GM-R900 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw
6
1.2 Features
The GM-R900 GPS engine board offers following features:
zSiRF starIII Chipset 20 Channels all in view tracking
zHigh Sensitivity -159dBm
zReacquisition Time: 0.1 second
zSupport Standard NMEA-0183 at 4800 bps baud rate
zOn-board rechargeable battery sustained real-time clock and memory for fast satellite
acquisition during power-up
zDimension/Weight: 56mmx53mmx22.5mm/96g
1.3 Applications
zLand/Marine Navigation
zTelematics
zFleet Management
zAsset Tracking
zTiming Reference
GM-R900 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw
7
1.4 Start-up Modes
Definitions
DESCRIPTION
Cold Start
The Cold Start takes the longest startup time among EMT GPS receivers. In
this scenario, the receiver has no acknowledgment on the last position, time,
and satellite constellation. The receiver is initiated to search blindly for satellite
signals in the cold start mode.
A
nother situation is that when no backup battery is connected, the GPS
receiver will be in the cold start mode and there is no data stored in SRAM.
Execute cold start of the test tool when first use. By this way can speed up
position fix time.
Warm Start
In this scenario, the receiver was off less than one week but more than 2-hour
time.
The receiver knows its last position, time and almanac because it has a
backup battery to keep current almanac, position and time stored in SRAM.
In the warm start mode, the receiver can quickly acquire satellites and get a
position fix faster than it does in the cold start mode.
Hot Start
In this scenario, the receiver was off less than 2-hour time. With the back up
battery connected and the current almanac, position, time and ephemeris
stored in SRAM, the receiver applies its last ephemeris data to calculate and
get a position fix.
Reacquisition
In the reacquisition mode, the receiver takes time to lock on satellites if
buildings or obstacles are blocking the signals for a short while.
This is very common in urban areas, but please be noted that reacquisition
time has nothing to do with the time-to-first-fix (TTFF).
GM-R900 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw
8
2. Technical Specifications
2.1 Electrical Characteristics
2.1.1 General
Frequency L1, 1575.42 MHz
C/A code 1.023 MHz chip rate
Channels 20
2.1.2 Sensitivity
Tracking -159dBm type
2.1.3 Accuracy
Position <15 meters CEP (95%) horizontal, SAoff.
Velocity 0.1 meters/second
Time ±100 ns synchronized to GPS time
2.1.4 Datum
Default WGS-84
Other Support different datum by request
2.1.5 Acquisition Rate
Hot start 1 sec, average
Warm start 38 sec, average
Cold start 42 sec, average
2.1.6 Dynamic Conditions
Altitude 18,000 meters max
Velocity 515 meters/second (1000 knots) , max.
Acceleration 4g, max
Jerk 20 meters/second3, max.
GM-R900 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw
9
2.1.7 Power
Main power input 5V ± 0.5Vp-p DC input.
Supply Current Max. 80 mA
2.1.8 Serial Port
Electrical interface LVTTL and RS-232 interface
Protocol message NMEA-0183, Version 2.2
Default NMEA GGA, GSA, GSV, RMC 4800 baud rate,
8 bits data, 1 star , 1 stop, no parity.
(Option baud rate: 9600, 19200, 38400)
2.2 Environmental Characteristics
Operating temperature range -40 ℃to +80 ℃
Storage temperature range -45 ℃to +85 ℃
Operating humidity range 5% to 90% non-condensing
2.3 Physical Characteristics
Dimension: 56mmx53mmx22.5mm(2.20”x2.08”x0.88”)
Weight: 96g (3.38oz)
Interface standard connector: PS/2 female connector
Interface optional connector: USB cable or car charger for PDA
GM-R900 User’s Manual
EverMore Technology Inc.
2F, No.7, R&D Road 1, Science-Based Industrial Park, Hsinchu, Taiwan, 300, R.O.C. http://www.emt.com.tw
10
3. Hardware Interface
3.1 GM-R900 PS/2 Female Connector (standard type)
PS/2 Female Connector Pin Assignment
Pin Function Input/Output Level
1 RXD Input 3.3V, LVTTL
2 RX Input 12V, RS-232
3 GND
4 TX Output 12V, RS-232
5 TXD Output 3.3V, LVTTL
6 VCC Power Supply 5V
4TX 6
VCC
2
RX
PS/2(Female)
1
RXD at the GM-R900
3
GND 5TXD
PS/2 female connector (standard type)
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