Global Sat ET-312 Manual de usuario

ET-312

Page1of21

Version 1.4

GPS Engine Board ET-312

Version 1.4

01/20/2010

Globalsat Technology Corporation Headquarters (Far East Century Park)

16F., No. 186, Jian-Yi Road, Chung-Ho City, Taipei Hsien 235, Taiwan

Tel: 886-2-8226-3799/ Fax: 886-2-8226-3899

E-mail : service@globalsat.com.tw

Website: www.globalsat.com.tw

ET-312

Page 2 of 21

Version 1.4

1. Product Information

Product Name: ET-312

Product Description:

ET-312 is a compact, high performance, and low power consumption GPS engine board. It uses SiRF

Star III chipset which can track up to 20 satellites at a time and perform fast TTFF in weak signal

environments. ET-312 is suitable for the following applications:

‧ Automotive navigation

‧ Personal positioning

‧ Fleet management

‧ Mobile phone navigation

‧ Marine navigation

Product Features:

SiRF star III high performance GPS Chipset

Very high sensitivity (Tracking Sensitivity: -159 dBm)

Extremely fast TTFF (Time To First Fix) at low signal level

One serial ports

4Mb flash

Built-in LNA

Compact size (28mm * 20 mm * 2.9mm) suitable for space-sensitive application

One size component, easy to mount on another PCB board

Support NMEA 0183 and SiRF binary protocol

Product Specifications

GPS Receiver

Chipset SiRF GSC3f/LP

Frequency L1, 1575.42 MHz

Code C/A Code

Protocol NMEA 0183 v2.2

Default:GGA,GSA,GSV,RMC

Support:VTG,GLL,ZDA)

SiRF binary and NMEA Command

Available Baud Rate 4,800 to 57,600 bps adjustable

ET-312

Page 3 of 21

Version 1.4

Channels 20

Flash 4Mbit

Sensitivity Tracking:-159dBm

Cold Start 42 seconds, average

Warm Start 38 seconds, average

Hot Start 1 second, average

Reacquisition 0.1 second, average

Accuracy Position: 10 meters, 2D RMS

5 meters, 2D RMS, WAAS enabled

Velocity: 0.1 m/s

Time: 1us synchronized to GPS time

Maximum Altitude ＜18,000 meter

Maximum Velocity ＜515 meter/second

Maximum Acceleration ＜4G

Update Rate 1 Hz

DGPS WAAS, EGNOS, MSAS

Datum WGS-84

Interface

I/O Pins 1 serial ports

Physical Characteristic

Type 13-pin stamp holes

Dimensions 28 mm * 20 mm * 2.9 mm

DC Characteristics

Power Supply 3.3Vdc ± 5%

Backup Voltage 2.0 ~ 3.6Vdc ± 10%

Power Consumption Acquisition: 60mA

Tracking: 42mA

Environmental Range

Humidity Range 5% to 95% non-condensing

Operation Temperature -30℃ to 85℃

Storage Temperature -40℃ to 85℃

ET-312

Page 4 of 21

Version 1.4

2. Technical Information

Block Diagram

Module Pin Assignment:

GPS Engine Board

GND

VIN

GND

BATTERY

GPIO1

Pin NO. Pin Name Remark

1. GND Ground.

2. RF Connect to External Active Antenna. While external antenna is used, the

optional power is needed.

3. GND Ground.

4. GND Ground.

5. GND Ground.

6. GND Ground.

7. VIN This is the main DC supply for a 3.3V +- 5% DC input power module board.

8. BATTERY This is the battery backup input that powers the SRAM and RTC when main

power is removed. Typical current draw is 15uA. Without an external backup

battery, the module/engine board will execute a cold star after every turn on.

To achieve the faster start-up offered by a hot or warm start, a battery

backup must be connected. The battery voltage should be between 2.0v and

ET-312

Page 5 of 21

Version 1.4

5.0v.

9. GPIO1 User can use this I/O pin for special function.For example, on/off LED

10. 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

11. RX This is the main receive channel for receiving software commands to the

engine board from SiRFdemo software or from user written software.

12. GND Ground.

13. GND Ground.

ET-312

Page 6 of 21

Version 1.4

Application Circuit

GPS Active Antenna Specification(Recommendation)

Frequency: 1575.42+2 MHz

Axial Ratio: 3 dB Typical

output Impedance: 50Ω

Polarization: RHCP

Amplifier Gain :18~22dB Typical

Output VSWR: 2.0 Max.

Noise Figure: 2.0 dB Max

ET-312

Page 7 of 21

Version 1.4

Dimensions

ET-312

Page 8 of 21

Version 1.4

Recommend Layout PAD

ET-312

Page 9 of 21

Version 1.4

Recommended Reflow Profile:

Pre heating temperature: 150±10[ ]℃Pre heating time: 90±30[sec.]

Heating temperature: 235±5[ ]℃Heating time: 10±1[sec.]

Peak temperature must not exceed 240 and the duration of ove℃r 200 should be 30±10℃

Seconds.

10±1s

240℃Max.

30±10s

200℃

150±10℃

90±30s

235±5℃.

Temperature [℃]

Time [sec.]

ET-312

Page 10 of 21

Version 1.4

SOFTWARE COMMAND

NMEA Output Command

GGA-Global Positioning System Fixed Data

Table B-2 contains the values for the following example:

$GPGGA,161229.487,3723.2475,N,12158.3416,W,1,07,1.0,9.0,M,,,,0000*18

Table B-2 GGA Data Format

Name Exam

le Units Descri

tio

Messa

e ID $GPGGA GGA

rotocol heade

UTC Time 161229.487 hhmmss.sss

Latitude 3723.2475 ddmm.mmmm

/S Indicato

=north or S=south

Lon

itude 12158.3416 dddmm.mmm

E/W Indicato

W E=east or W=wes

Position Fix Indicato

1 See Table B-3

Satellites Use

07 Ran

e 0 to 12

HDOP 1.0 Horizontal Dilution of Precision

MSL Altitude19.0 meters

Units M meters

Geoid Se

aration1meters

Units M meters

e of Diff. Corr. second

ull fields when DGPS is not used

Diff. Ref. Station ID 0000

Checksu

*18

<CR><LF> End of messa

e termination

SiRF Technology Inc. does not support geoid corrections. Values are WGS84 ellipsoid heights.

Table B-3 Position Fix Indicator

Va l u e D e s c r i

tion

0 Fix not available or invali

1 GPS SPS Mode, fix vali

2 Differential GPS, SPS Mode , fix vali

3 GPS PPS Mode, fix vali

GLL-Geographic Position-Latitude/Longitude

Table B-4 contains the values for the following example:

$GPGLL,3723.2475,N,12158.3416,W,161229.487,A*2C

Tabla de contenidos

Otros manuales de GPS de Global Sat

Global Sat

Global Sat GH-561 GPS TREK PRO Manual de usuario

Global Sat

Global Sat LT-200 Series Manual de usuario

Global Sat

Global Sat GB-1000 Manual de usuario

Global Sat

Global Sat BU-303 Manual de usuario

Global Sat

Global Sat ET-332 Manual de usuario

Global Sat

Global Sat GV-201 Manual de usuario

Global Sat

Global Sat EB-3531 Manual de usuario

Global Sat

Global Sat TR-102 Manual de usuario

Global Sat

Global Sat BTT-100 Manual de usuario

Global Sat

Global Sat GD-101 Manual de usuario

Global Sat

Global Sat EM-406 Manual de usuario

Global Sat

Global Sat GS-3212 Manual de usuario

Global Sat

Global Sat Globalsat BT-359 Manual de usuario

Global Sat

Global Sat BT-821 Manual de usuario

Global Sat

Global Sat BU-353S4 Manual de usuario

Global Sat

Global Sat USB GPS Dongle ND-100 Manual de usuario

Global Sat

Global Sat GA-5718 Manual de usuario

Global Sat

Global Sat MR-350N Manual de usuario

Global Sat

Global Sat BT-821C Manual de usuario

Global Sat

Global Sat SiRF star III BT-359 Manual de usuario

Global Sat

Global Sat BU-303 Manual de usuario

Global Sat

Global Sat BR-355 Manual operacional

Global Sat

Global Sat DG-200 Manual de usuario

Global Sat

Global Sat ET-314 Manual de usuario

Manuales populares de GPS de otras marcas

Raven

Raven Cruizer II Manual

Hama

Hama 53118 Manual de usuario

Garmin

Garmin SOUNDER 125 Manual de usuario

Garmin

Garmin DEZL 580 Manual de usuario

Jigabot

Jigabot EX Manual de usuario

Pointer

Pointer Cellocator CelloTrack XT LTE Guía de instalación

Queclink

Queclink GV55LITE Manual de usuario

Voxson

Voxson Voxtrack GPS500 Manual de instrucciones

Garmin

Garmin ECHOMAP PLUS Manual de usuario

Starcom Systems

Starcom Systems Kylos Compact Manual de usuario

Garmin

Garmin 15 H Series Manual de usuario

Cobra

Cobra Marine MC 600Ci Manual de usuario

Cellocator

Cellocator CelloTrack T Manual de usuario

Enfora

Enfora Mini-MT GSM2228UG001 Manual de usuario

Magellan

Magellan eXplorist 100 Manual de usuario

LTE

LTE G50B Manual de usuario

Garmin

Garmin DEZL OTR500 Manual de usuario

SkyGolf

SkyGolf SkyCaddie SG1 Manual de usuario