Globalsat EM-408 User Manual
環天衛星科技股份有限公司
PRODUCT USER MANUAL
GPS ENGINE BOARD
EM-408
GlobalSat Technology Corporation
台北縣中和市建一路 186 號 16 樓(遠東世紀廣場)
16F ,No.186,Chien 1 Road, 235Chung Ho City,Taipei Hsien, Taiwan ,R.O.C.
Tel: 886-2-8226-3799(Rep.) Fax: 886-2-8226-3899
Web: www.globalsat.com.tw E-mail: service@globalsat.com.tw
Features:
SiRF starⅢ high performance GPS Chip Set
Very high sensitivity (Tracking Sensitivity: -159 dBm)
Extremely fast TTFF (Time To First Fix) at low signal level
Compact size (36.4mm * 35.4 mm * 8.3mm) suitable for space-sensitive application
Support NMEA 0183 and SiRF binary protocol
Specification:
General
Chipset SiRF StarⅢ
Frequency L1, 1575.42 MHz
C/A code 1.023 MHz chip rate
Channels 20 channel all-in-view tracking
Sensitivity -159 dBm
Accuracy
Position 10 meters, 2D RMS
5 meters, 2D RMS, WAAS enabled
Velocity 0.1 m/s
Time 1us synchronized to GPS time
Datum
Default WGS-84
Acquisition Time
Reacquisition 0.1 sec., average
Hot start 1 sec., average
Warm start 38 sec., average
Cold start 42 sec., average
Dynamic Conditions
Altitude 18,000 meters (60,000 feet) max
Velocity 515 meters /second (1000 knots) max
Acceleration Less than 4g
Jerk 20m/sec **3
Power
Main power input 3.3V DC input
Power consumption 75mA (Continuous mode)
Interface
Dimension 36.4mm * 35.4mm * 8.3mm
Baud rate 4,800 to 57,600 bps adjustable
Electrical level TTL level, Output voltage level: 0V ~ 2.85V
Output message SiRF binary or
NMEA 0183 GGA, GSA, GS V, RMC, VTG, GLL
Environmental
Operating Temp -40℃ to +85℃
Dimensions
Pin Assignment
Pin description
* VIN (DC power input):
This is the main DC supply for a 3.3V DC input power module board.
* GPS-TX:
This is the main transmits channel for outputting navigation and measurement
data to user’s navigation software or user written software.
Output TTL level, 0V ~ 2.85V
* GPS-RX:
This is the main receive channel for receiving software commands to the engine
board from SiRFdemo software or from user written software.
* GND:
GND provides the ground for the engine board. Connect all grounds.
* Enable/Disable:
On/Off
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