Global Sat ET-316A User manual

ET-316A

Page1of17

Version 1.2

GPS Engine Board ET-316A

Version 1.2

06/22/2007

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-316A

Page 2 of 17

Version 1.2

1. Product Information

Product Name: ET-316A

Product Description:

ET-316A 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-316A 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

Two serial ports

4Mb flash

Built-in LAN

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 StarⅢ

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-316A

Page 3 of 17

Version 1.2

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 2 serial ports

Physical Characteristic

Type 15-pin stamp holes

Dimensions 28.1 mm * 20 mm * 2.9 mm

DC Characteristics

Power Supply 3.3Vdc ± 5%

Backup Voltage 2.0 ~ 3.6Vdc ± 10%

Power Consumption Acquisition: 42mA

Tracking: 25mA

Environmental Range

Humidity Range 5% to 95% non-condensing

Operation Temperature -40℃ to 85℃

Storage Temperature -40℃ to 125℃

ET-316A

Page 4 of 17

Version 1.2

2. Technical Information

Block Diagram

Module Pin Assignment:

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.

ET-316A

Page 5 of 17

Version 1.2

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

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.

14. TXB NC

15. RXB NC

ET-316A

Page 6 of 17

Version 1.2

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-316A

Page 7 of 17

Version 1.2

Dimensions

ET-316A

Page 8 of 17

Version 1.2

Recommend Layout PAD

ET-316A

Page 9 of 17

Version 1.2

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 dddm

.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

ET-316A

Page 10 of 17

Version 1.2

TableB-4GLLDataFormat

Name Exam

le Units Descri

tion

Messa

e ID $GPGLL GLL

rotocol heade

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

UTC Position 161229.487 hhmmss.sss

Status A A=data valid or V=data not valid

Checksu

*2C

<CR><LF> End of messa

e termination

GSA-GNSS DOP and Active Satellites

Table B-5 contains the values for the following example:

$GPGSA,A,3,07,02,26,27,09,04,15,,,,,,1.8,1.0,1.5*33

TableB-5GSADataFormat

Name Example Units Description

Message ID $GPGSA GSA protocol header

Mode1 A See Table B-6

Mode2 3 See Table B-7

Satellite Used107 Sv on Channel 1

Satellite Used102 Sv on Channel 2

…..

Satellite Used1Sv on Channel 12

PDOP 1.8 Position dilution of Precision

HDOP 1.0 Horizontal dilution of Precision

VDOP 1.5 Vertical dilution of Precision

Checksum *33

<CR><LF> End of message termination

1. Satellite used in solution.

TableB-6Mode1

Value Description

M Manual-forced to operate in 2D or 3D mode

A 2Dautomatic-allowed to automatically switch 2D/3D

TableB-7Mode2

Value Description

1 Fix Not Available

2 2D

3 3D

GSV-GNSS Satellites in View

Table B-8 contains the values for the following example:

Table of contents

Other Global Sat GPS manuals

Global Sat

Global Sat ET-318 User manual

Global Sat

Global Sat TR-203A User manual

Global Sat

Global Sat ET-112 User manual

Global Sat

Global Sat BU-303 User manual

Global Sat

Global Sat BC-337 User manual

Global Sat

Global Sat DG-200 User manual

Global Sat

Global Sat GD-102 User manual

Global Sat

Global Sat ND-100S User manual

Global Sat

Global Sat ET-333 User manual

Global Sat

Global Sat EB-3531 User manual

Global Sat

Global Sat TR-102 User manual

Global Sat

Global Sat LT-20P Series User manual

Global Sat

Global Sat TR-600 User manual

Global Sat

Global Sat EM-408 User manual

Global Sat

Global Sat TR-600G User manual

Global Sat

Global Sat ET-212 User manual

Global Sat

Global Sat BT-308 User manual

Global Sat

Global Sat TR-300V User manual

Global Sat

Global Sat SiRF star III BT-359 User manual

Global Sat

Global Sat TR-151 User manual

Global Sat

Global Sat Globalsat BT-359 User manual

Global Sat

Global Sat GD-101 User manual

Global Sat

Global Sat GH-601 User manual

Global Sat

Global Sat MobileDefender 4 User manual

Popular GPS manuals by other brands

Raven

Raven Cruizer II Manual

Hama

Hama 53118 Operating instruction

Garmin

Garmin SOUNDER 125 Owner's manual & reference

Garmin

Garmin DEZL 580 owner's manual

Jigabot

Jigabot EX quick start guide

Pointer

Pointer Cellocator CelloTrack XT LTE overview

Queclink

Queclink GV55LITE user manual

Voxson

Voxson Voxtrack GPS500 Quick user guide

Garmin

Garmin ECHOMAP PLUS owner's manual

Starcom Systems

Starcom Systems Kylos Compact user guide

Garmin

Garmin 15 H Series Technical specifications

Cobra

Cobra Marine MC 600Ci owner's manual

Cellocator

Cellocator CelloTrack T installation guide

Enfora

Enfora Mini-MT GSM2228UG001 user guide

Magellan

Magellan eXplorist 100 Reference manual

LTE

LTE G50B user manual

Garmin

Garmin DEZL OTR500 owner's manual

SkyGolf

SkyGolf SkyCaddie SG1 user guide