USGlobalsat ER-112 User Manual
ET-112
Version 1.3
GPS Engine Board
ET-112/ER-112
Globalsat Technology Corporation
16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan
Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899
service@globalsat.com.tw
www.globalsat.com.tw
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USGlobalSat, Inc.
14740 Yorba Court, Chino, CA 91710
Tel: 909.597.8525 / Fax: 909.597.8532
oem@usglobalsat.com
www.usglobalsat.com
Specifications are subject to be changed without notice.
ET-112
Version 1.3
1. Product Information
Product Part I.D. ET-112
Product Description
The ET-112 GPS engine board is low cost but maintains high reliability and accuracy making it an ideal
choice for integration with OEM/ODM systems.
Product Features
SiRF GSC2x high performance GPS Chip Set
Very high sensitivity (Tracking Sensitivity: -159dBm)
Extremely fast TTFF (Time To First Fix) at low signal levels
Supports the NMEA 0183 data protocol
Connector for active antenna
Enhanced algorithm for navigation stability
Foliage Lock for weak signal tracking
All-in-view 20-channel parallel processing
Snap Lock 100ms re-acquisition time
Superior urban canyon performance
Full-duplex RS-232 for navigation and control messages
Differential GPS capability through second RS232 port
RoHS compliant
Product Specifications
GPS Receiver
Chipset SiRF GSC2X Single
Frequency L1, 1575.42 MHz
Code 1.023 MHz chip rate
Protocol Electrical Level: TTL level,
Serial I/O Port 1-port for GPS
Output Voltage Level: 0V~2.85V
Baud Rate: 4800 bps
Output Message: NMEA 0183 GGA, GSA,
GSV, RMC (VTG, GLL optional)
1-port for DGPS
Specifications are subject to be changed without notice.
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ET-112
Channels 20
Sensitivity -155dBw
Cold Start 48 seconds average
Warm Start 38 seconds average
Hot Start 8 second average
Reacquisition 0.1 second average
Accuracy Position: 15 meters, 2D RMS 10 meters,
2D RMS, WAAS enable 1~5 meters DGPS
corrected
Velocity: 0.1 ms (95% SA Off)
Time: 1µs synchronized to GPS time
Maximum Altitude 18,000 meters (60,000 feet) max
Maximum Velocity 515 meter/second (1000 knots) max
Maximum Acceleration 4G
Datum WGS-84
Version 1.3
Jerk Limit Jerk: 20m/sec **3
Electrical Level
ET-112: TTL output voltage: 0~3.5V
ER-112: RS232 Level
Communication Full-Duplex asynchronous
Code Type ASCII
Protocol NMEA 0183 (default) / SiRF Binary
(available)
GPS Message Output NMEA 0183 >> GGA, GSA, GSV, RMC,
(VTG & GLL optional)
DGPS Protocol RTCM SC-104, v2.00, type 1, 2 and 9
Time Mark (1 PPS) Level: TTL
Pulse Duration: 100ms
Time Reference: At the pulse positive edge
Measurement: Aligned to GPS sec, +/- 1us
Interface
External Antenna Port MMCX
Physical Characteristic
Dimensions 2.8” x 1.6” x 0.4” (71 x 40.5 x10mm)
DC Characteristics
Power Supply 3.8V~6.5V DC
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Specifications are subject to be changed without notice.
Backup Voltage +2.5V to +3.6V
Power Consumption 42mA (Continuous Mode)
Backup Current 10uA typical
Environmental Range
Humidity Range
Operation Temperature -40F to +176F (-40C to 85C)
2. Technical Information
Physical Characteristics
ET-112
29mA (Trickle Power Mode)
Version 1.3
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Specifications are subject to be changed without notice.
ET-112
Version 1.3
OPTIONAL MCX CONNECTOR
Φ4.5
1. Needs external Active-antenna & its power Vant. 6.4 mm
2. Needs external Vdc = 3.8 --- 6.5 Vcc 10.0 mm
3. Current supply I = 150 mA
4. PCB SIZE: 40.64mm x 71.12mm
Φ0.95 pin x 5
5. Connector (pitch=2.0 mm) pin-assignment
Pin Assignment
ET-112 equipped with MMCX female
connector
Specifications are subject to be changed without notice.
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