Global Sat ET-312 Manuel utilisateur

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

Table des matières

Autres manuels Global Sat GPS

Global Sat

Global Sat ET-333 Manuel utilisateur

Global Sat

Global Sat BU-303 Manuel utilisateur

Global Sat

Global Sat GPS Director YE-GD101 Manuel utilisateur

Global Sat

Global Sat BR-355 Manuel utilisateur

Global Sat

Global Sat LT-200 Series Manuel utilisateur

Global Sat

Global Sat TR-102 Manuel utilisateur

Global Sat

Global Sat ET-212 Manuel utilisateur

Global Sat

Global Sat ET-112 Manuel utilisateur

Global Sat

Global Sat BR-355S4 Manuel utilisateur

Global Sat

Global Sat LT-100 Series Manuel utilisateur

Global Sat

Global Sat TR-101 Manuel utilisateur

Global Sat

Global Sat BT-386i Manuel utilisateur

Global Sat

Global Sat TR-151SP Manuel utilisateur

Global Sat

Global Sat GS-Traq TR-206 Manuel utilisateur

Global Sat

Global Sat USB GPS Dongle ND-100 Manuel utilisateur

Global Sat

Global Sat BR-355 Manuel d'exploitation

Global Sat

Global Sat SD-501 Manuel utilisateur

Global Sat

Global Sat GD-101 Manuel utilisateur

Global Sat

Global Sat Globalsat BT-359 Manuel utilisateur

Global Sat

Global Sat LT-20P Series Manuel utilisateur

Global Sat

Global Sat EB-5631RE Manuel utilisateur

Global Sat

Global Sat GTR-128 Manuel utilisateur

Global Sat

Global Sat ET-318 Manuel utilisateur

Global Sat

Global Sat GS-3212 Manuel utilisateur

Manuels GPS populaires d'autres marques

Raven

Raven Cruizer II Manuel

Hama

Hama 53118 Manuel utilisateur

Garmin

Garmin SOUNDER 125 Manuel utilisateur

Garmin

Garmin DEZL 580 Manuel utilisateur

Jigabot

Jigabot EX Manuel utilisateur

Pointer

Pointer Cellocator CelloTrack XT LTE Guide d'installation

Queclink

Queclink GV55LITE Manuel utilisateur

Voxson

Voxson Voxtrack GPS500 Manuel d'instructions

Garmin

Garmin ECHOMAP PLUS Manuel utilisateur

Starcom Systems

Starcom Systems Kylos Compact Manuel utilisateur

Garmin

Garmin 15 H Series Manuel utilisateur

Cobra

Cobra Marine MC 600Ci Manuel utilisateur

Cellocator

Cellocator CelloTrack T Manuel utilisateur

Enfora

Enfora Mini-MT GSM2228UG001 Manuel utilisateur

Magellan

Magellan eXplorist 100 Manuel utilisateur

LTE

LTE G50B Manuel utilisateur

Garmin

Garmin DEZL OTR500 Manuel utilisateur

SkyGolf

SkyGolf SkyCaddie SG1 Manuel utilisateur