Haicom HI-203E Manuale utente

HI-203E

Mini-D/N GPS Receiver Module

User'srGuide

GeneraldescriptionofwhatGPS

isandhowitworks.

GPS(GlobalPositioningSystem)istheonlysystemtodayabletoshowyouyour

exactpositionontheEarthanytime,inanyweather,anywhere.GPSsatellites,24

inall,orbitat11,000nauticalmilesabovetheEarth.Theyarecontinuously

monitoredbygroundstationslocatedworldwide.Thesatellitestransmitsignals

thatcanbedetectedbyanyonewithaGPSreceiver.Usingthereceiver,youcan

determineyourlocationwithgreatprecision.

Thesatellitesarepositionedsothatwecanreceivesignalsfromsixofthemnearly

100percentofthetimeatanypointonEarth.Youneedthatmanysignalstoget

thebestpositioninformation.Satellitesareequippedwithverypreciseclocksthat

keepaccuratetimetowithinthreenanoseconds-that's0.000000003,orthree

billionths,ofasecond.Thisprecisiontimingisimportantbecausethereceiver

mustdetermineexactlyhowlongittakesforsignalstotravelfromeachGPS

satellite.Thereceiverusesthisinformationtocalculateitsposition.

AlthoughGPSwasdesignedformilitaryuse,manythousandsofciviliansmake

useofit.Thesatellitesactuallybroadcasttwosignals,onethatisonlyformilitary

use,andonethatcanbeusedbybothmilitaryandcivilians.SinceGPSispassive

(youonlyneedtoreceivethesignal),therearenorestrictionsonwhocanusethe

signalavailabletocivilians.

GPStechnologycanbeusedinavarietyoffieldsbesidesprovidingnavigationfor

vehiclesonthesea,intheairandontheground.GPSapplicationsalsoinclude

keepingtrackofwhereafleetoftrucks,trains,shipsorplanesareandhowfast

theyaremoving;directingemergencyvehiclestothesceneofanaccident;

mappingwhereacity'sassetsarelocated;andprovidingprecisetimingfor

endeavorsthatrequirelarge-sca lecoordination.

250030mm

PS/2Connector

Color Function CN1

Green TX 5

White RX 4

Red VCC 2

Black GND 1

1MinDin:6pinmale

connector

2Wire:3.60.1mm

135

246

Applications

Note:

ToreceiveBetterSatelliteSignal,PleaseDon'tplace

HI-203Eonthedashboardifyourwindshieldglasswith

UVProtection.

ForPDAuse:

HI-203EPS/IIGPSreceiverCanConnectingtoafemale

PS/IIConnector.OneendfromthefemaleConnectoris

+12Vcarcharger(chargingPDAandGPSreceiver)the

otherendformthefemalePS/IIconnectoristhePDA

connectorforconnectingyourPDA.

GPSReceiver

PS/2

CarCharger(+12V)

PowerforPDA/GPS

PDA

Connector

FornotebookPCuse:

HI-203EPS/IIcanalsoconnectwithaPS/IItoDB9

PS-232serialcable

PS/FemaleII PS/MaleII

(ToHI-203E) (PowerOutput) DB-9

(DataOutput)

GLOBALPOSITIONINGSYSTEM

HI-203EGPSRECEIVER

PinAssignment

Connectors

SECTION 1

INTRODUCTION

1.1 OVERVIEW

The HI-203EGPS Receiver is intended for use in awide range of applications. The receiver

simultaneously tracks up to twelve satellites, provides accurate satellite positioning data with

fast time-to-first-fix (TTFF) and low power consumption. It is designed for high performance

and maximum flexibility in awide range of applications including mobile asset tracking,

in-vehicle automotive guidance, location sensing, telematics and so on. The highly integrated

receiver achieves high performance, minimizes board size and power consumption

requirements. The HI-203E is designed to withstand harsh operating environments; however,

it should be used inside an enclosure as apart of the application product designed by the

system integrator.

1.2 FEATURES

The HI-203E GPS receiver offers following features:

lTwelve parallel tracking channels

lFast TTFF and low power consumption

lCompact design suitable for applications requiring small space

lOn-board rechargeable battery sustained real-time clockand memory for fast satellite

acquisition during power-up

lHigh accuracy one-pulse-per-second output

lSupports NMEA-0183 protocol

lFull navigation accuracy achievable with Standard Positioning Service

lOptimized for navigation in urban-canyon environments

lAutomatic cold start with no user initialization required

SECTION 2

RECEIVER OPERATION

Upon power up, after initial self-test has completed, the HI-203E will begin satellite

acquisition and tracking process. Under normal open-sky condition, position-fix can be

achieved within approximately 45 seconds (within 15 seconds if valid ephemeris data is

already collected from recent use). After receiver position has been calculated, valid position,

velocity and time information are transmitted through the on board serial interface.

The receiver uses the latest stored position, satellite data, and current RTC time to achieve

rapid GPS signal acquisition and fast TTFF. If the receiver is transported over alarge distance

across the globe, cold-start automatic-locate sequence is invoked. The first position fix may

take up to five minutes searching the sky for the GPS signal. The acquisition performance can

be improved significantly if the host initializes the receiver with arough estimate of time and

user position.

As soon as GPS signal is acquired and tracked, the HI-203E will transmit valid navigation

information through its serial interface. The navigation data contains following information:

lReceiver position in latitude, longitude, and altitude

lReceiver velocity

lTime

lDOP error-magnification factor

lGPS signal tracking status

The HI-203E will perform 3D navigation when four or more satellites are tracked. When three

or fewer satellites are tracked, altitude-hold is enabled using the last computed altitude and 2D

navigation mode is entered.

With signal blockage or rising and setting of the satellites, where achange in satellite

constellation used for position fix occurred, large position error may result. The HI-203E

incorporates aproprietary algorithm to compensate the effect of satellite constellation change,

and maintains an accurate smooth estimate of the receiver position, velocity, and heading.

2.1 RECEIVER SPECIFICATIONS

FEATURES DESCRIPTION

General L1 frequency, C/A code, 12-channel

Sensitivity -165 dBW minimum

Update Rate 1Hz

Accuracy Position: 25m CEP without S/A

Velocity :0.1/sec without S/A

Acquisition Cold start: <150sec (typical)

Warm start: <45sec (typical)

Hot start: <15sec

Reacquisition <100msec

Dynamics Altitude: -1000m to 18000m

Velocity: 500m/sec

Acceleration: g

Operation Temperature -20oCto +75oC

Storage Temperature -55oCto +90oC

Operating Humidity 5% to 95%

Primary Power +3.8V ~8V DC

Current Consumption 125mA @3.3V

Serial Interface RS-232

Protocol HAICOMPrivate @4800/9600 baud, 8-None-1

NMEA-0183 v2.20 @4800/9600 baud, 8-None-1

Datum 219 standard datum, default WGS-84

Antenna On-Board Patch Antenna

NMEA Message GGA, GLL, GSA, GSV,RMC, and VTG

Dimension 45.5mm x31mm x15mm

SECTION 3

HARDWARE INTERFACE

3.1 MECHANICAL DIMENSIONS

Unit:mm

Top View

Lateral View

Bottom View

CPU

I/OCable

57.950.2

I/OCable

57.950.2

3.2 RF MODULE HARDWARE INTERFACE

Pin Description

1NC

2NC

3Vcc Input :3.3V

4CTRL :Input signal for RF module power-saving control

5GND :Power and signal ground

6REF Out :16.367MHz reference output

7GND :Power and signal ground

8IF Out :4.092MHz IF signal output

9NC

10 NC

RFIC

3.3 BASEBAND HARDWARE INTERFACE

The 10 pin-connector is the same as the RF connector.

A1 :GND, Ground

A2 :1PPS Valid Signal (1:Valid, 0:Invalid)

A3 :1PPS

B1 :TX,Serial port output (GPS navigation output)

B2 :RX,Serial port input

B3 :Vcc, Power supply input, 3.8V ~8.0V DC unregulated

The following is afunctional description of the pins on the 6-pin interface connector.

Pin 1. TX, Serial port output (GPS navigation output)

Pin 2. RX, Serial port input

Pin 3: Vcc, Power supply input, 3.8V ~8.0V DC unregulated

Pin 4: GND,Ground

Pin 5: 1PPS Valid Signal (1:Valid, 0:Invalid)

Pin 6: 1PPS

3.4ONE-PULSE-PER-SECOND (1PPS) OUTPUT

The one-pulse-per-second output is provided for applications requiring precise timing

measurements. The output pulse is 1usec in duration.Rising edge of the output pulse is

accurate to +/-1usec with respect to the start of each GPS second. Accuracy of the

one-pulse-per-second output is maintained only when the GPS receiver hasvalid position fix.

The 1PPS output is always generated when the GPS receiver is powered-on. Proper

adjustment of the 1PPS output to align with the GPS second requires calculation of the

receiver clock offset and clock drift-rate as part of the position-velocity-time (PVT) solution.

When enough satellite signals are received to generate valid position fixes, the 1PPS output is

adjusted to align with the GPS second in several seconds. Whenthe 1PPS output is brought in

sync with the GPS second, the 1PPS Valid Signal on the I/O pin becomes active (HIGH); when

the 1PPS output is not yet in sync with the GPS second, the 1PPS Valid Signal remains

inactive (LOW).

As long as enough satellite signals are received to generate valid position fixes, the 1PPS

output remains synchronized to the GPS second, and the 1PPS Valid Signal remains active. If

signal blockage prevents the receiver from generating valid position fix, the 1PPS output will

drift away from the GPS second and the 1PPS Valid Signal will become inactive. Upon

re-acquiring enough satellites to generate consecutive valid position fixes, the 1PPS Valid

Signal will become active again, signaling that the 1PPS output is again synchronized with the

GPS second.

For best stable operation of the 1PPS signal, it is to be operated in static environment having

clear view of the sky.

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