Trimble Outdoors Aggps 332 Users Manual GPS Receiver User Guide

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USER GUIDE

AgGPS® 332 GPS Receiver

56370-00_332GPS_reciever_MC_7.25x9_0805.indd 1 15/08/2005 9:28:10 a.m.

www.trimble.com

Trimble Navigation Limited

Agriculture Business Area

7401 Church Ranch Blvd

Westminster, CO 80021

USA

+1-913-495-2700 Phone

Trimble Navigation Limited

Corporate Headquarters

935 Stewart Drive

Sunnyvale, CA 94085,

USA

+1-408-481-8000 Phone

Trimble Navigation Limited

Agriculture Business Area

Water Management Division

5475 Kellenburger Road

Dayton, Ohio, 45424-1099

USA

+1-937-233-8921 Phone

56370-00_332GPS_reciever_MC_7.25x9_0805.indd 2 15/08/2005 9:28:10 a.m.

Version 1.00

Revision A

Part number 56370-00-ENG

September 2005 

USER GUIDE

AgGPS® 332 GPS Receiver

Corporate Office

Trimble Navigation Limited

645 North Mary Avenue

PO Box 3642

Sunnyvale, CA 94085

USA

www.trimble.com

Legal Notices

© 2005, Trimble Navigation Limited. All rights

reserved.Trimble, the Globe & Triangle logo, AgGPS,

AutoPilot, and EZ-Guide are trademarks of Trimble

Navigation Limited registered in the US Patent and

Trademark Office and in other countries. EZ-Steer, Zephyr is

a trademark of Trimble Navigation Limited.

Recon is a trademark of Tripod Data Systems Inc., a wholly

owned subsidiary of Trimble Navigation Limited.

Microsoft, Windows, and ActiveSync are either registered

trademarks or trademarks of Microsoft Corporation in the

United States and/or other countries.

All other trademarks are the property of their respective

owners.

Release Notice

This is the September 2005 release (Revision A) of the AgGPS

332 GPS Receiver User Guide, part number 56370-00-ENG. It

applies to version 1.00 of the AgGPS 332 GPS receiver.

Limited Warranty Terms and Conditions

Product Limited Warranty

Subject to the terms and conditions set forth herein, Trimble

Navigation Limited (“Trimble”) warrants that for a period of

(1) year from date of purchase this Trimble product (the

“Product”) will substantially conform to Trimble's publicly

available specifications for the Product and that the

hardware and any storage media components of the Product

will be substantially free from defects in materials and

workmanship.

Product Software

Product software, whether built into hardware circuitry as

firmware, provided as a standalone computer software

product, embedded in flash memory, or stored on magnetic

or other media, is licensed and not sold. If accompanied by a

separate end user license agreement, use of any such

software will be subject to the terms of such end user license

agreement (including any differing limited warranty terms,

exclusions and limitations), which shall control over the

terms and conditions set forth in this limited warranty).

Software Updates

During the limited warranty period you will be entitled to

receive such Fix Updates and Minor Updates to the Product

software that Trimble releases and makes commercially

available and for which it does not charge separately, subject

to the procedures for delivery to purchasers of Trimble

products generally. If you have purchased the Product from

an authorized Trimble distributor rather than from Trimble

directly, Trimble may, at its option, forward the software Fix

Update or Minor Update to the Trimble distributor for final

distribution to you. Major Upgrades, new products, or

substantially new software releases, as identified by Trimble

are expressly excluded from this update process and limited

warranty. Receipt of software updates shall not serve to

extend the limited warranty period.

For purposes of this warranty the following definitions shall

apply: (1) “Fix Update” means an error correction or other

update created to fix a previous software version that does

not substantially conform to its published specifications; (2)

“Minor Update” occurs when enhancements are made to

current features in a software program; and (3) “Major

Upgrade” occurs when significant new features are added to

software, or when a new product containing new features

replaces the further development of a current product line.

Trimble reserves the right to determine, in its sole discretion,

what constitutes a significant new feature and Major

Upgrade.

Warranty Remedies

If the Trimble Product fails during the warranty period for

reasons covered by this Limited Warranty and you notify

Trimble of such failure during the warranty period, Trimble

at its option will repair OR replace the nonconforming

Product, OR refund the purchase price paid by you for the

Product, upon your return of the Product to Trimble in

accordance with Trimble's standard return material

authorization procedures.

How to Obtain Warranty Service

To obtain warranty service for the Product, please contact

your Trimble dealer. Alternatively, you may contact Trimble

to request warranty service at +1-408-481-6940 (24 hours a

day) or e-mail your request to trimble_support@trimble.com.

Please be prepared to provide:

– your name, address, and telephone numbers

– proof of purchase

– this Trimble warranty card

– a description of the nonconforming Product including the

model number

– an explanation of the problem.

The customer service representative may need additional

information from you depending on the nature of the

problem.

Warranty Exclusions and Disclaimer

This Product limited warranty shall only apply in the event

and to the extent that (i) the Product is properly and

correctly installed, configured, interfaced, maintained,

stored, and operated in accordance with Trimble's applicable

operator's manual and specifications, and; (ii) the Product is

not modified or misused. This Product limited warranty shall

not apply to, and Trimble shall not be responsible for defects

or performance problems resulting from (i) the combination

or utilization of the Product with hardware or software

products, information, data, systems, interfaces or devices

not made, supplied or specified by Trimble; (ii) the

operation of the Product under any specification other

than, or in addition to, Trimble's standard specifications for

its products; (iii) the unauthorized, installation, modification,

or use of the Product; (iv) damage caused by: accident,

lightning or other electrical discharge, fresh or salt water

immersion or spray; or exposure to environmental

conditions for which the Product is not intended; or (v)

normal wear and tear on consumable parts (e.g., batteries).

Trimble does not warrant or guarantee the results obtained

through the use of the Product. NOTICE REGARDING

PRODUCTS EQUIPPED WITH GPS TECHNOLOGY:

TRIMBLE IS NOT RESPONSIBLE FOR THE OPERATION OR

FAILURE OF OPERATION OF GPS SATELLITES OR THE

AVAILABILITY OF GPS SATELLITE SIGNALS.

THE FOREGOING LIMITED WARRANTY TERMS STATE

TRIMBLE'S ENTIRE LIABILITY, AND YOUR EXCLUSIVE

REMEDIES, RELATING TO PERFORMANCE OF THE

TRIMBLE PRODUCT. EXCEPT AS OTHERWISE EXPRESSLY

PROVIDED HEREIN, THE PRODUCT AND

ACCOMPANYING DOCUMENTATION AND MATERIALS

ARE PROVIDED “AS-IS” AND WITHOUT EXPRESS OR

IMPLIED WARRANTY OF ANY KIND, BY EITHER TRIMBLE

OR ANYONE WHO HAS BEEN INVOLVED IN ITS

CREATION, PRODUCTION, INSTALLATION, OR

DISTRIBUTION, INCLUDING, BUT NOT LIMITED TO, THE

IMPLIED WARRANTIES OF MERCHANTABILITY AND

FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND

NONINFRINGEMENT. THE STATED EXPRESS

WARRANTIES ARE IN LIEU OF ALL OBLIGATIONS OR

LIABILITIES ON THE PART OF TRIMBLE ARISING OUT OF,

OR IN CONNECTION WITH, ANY PRODUCT.

SOME STATES AND JURISDICTIONS DO NOT ALLOW

LIMITATIONS ON DURATION OR THE EXCLUSION OF AN

IMPLIED WARRANTY, SO THE ABOVE LIMITATION MAY

NOT APPLY TO YOU.

Limitation of Liability

TRIMBLE'S ENTIRE LIABILITY UNDER ANY PROVISION

HEREIN SHALL BE LIMITED TO THE AMOUNT PAID BY

YOU FOR THE PRODUCT. TO THE MAXIMUM EXTENT

PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL

TRIMBLE OR ITS SUPPLIERS BE LIABLE FOR ANY

INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL

DAMAGE WHATSOEVER UNDER ANY CIRCUMSTANCE

OR LEGAL THEORY RELATING IN ANYWAY TO THE

PRODUCTS, SOFTWARE AND ACCOMPANYING

DOCUMENTATION AND MATERIALS, (INCLUDING,

WITHOUT LIMITATION, DAMAGES FOR LOSS OF

BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF

DATA, OR ANY OTHER PECUNIARY LOSS), REGARDLESS

OF WHETHER TRIMBLE HAS BEEN ADVISED OF THE

POSSIBILITY OF ANY SUCH LOSS AND REGARDLESS OF

THE COURSE OF DEALING WHICH DEVELOPS OR HAS

DEVELOPED BETWEEN YOU AND TRIMBLE. BECAUSE

SOME STATES AND JURISDICTIONS DO NOT ALLOW THE

EXCLUSION OR LIMITATION OF LIABILITY FOR

CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE

ABOVE LIMITATION MAY NOT APPLY TO YOU.

PLEASE NOTE: THE ABOVE TRIMBLE LIMITED

WARRANTY PROVISIONS WILL NOT APPLY TO

PRODUCTS PURCHASED IN THOSE

JURISDICTIONS, SUCH AS COUNTRIES OF THE

EUROPEAN ECONOMIC COMMUNITY, IN WHICH

PRODUCT WARRANTIES ARE OBTAINED FROM

THE LOCAL DISTRIBUTOR. IN SUCH CASE, PLEASE

CONTACT YOUR TRIMBLE DEALER FOR

APPLICABLE WARRANTY INFORMATION.

Registration

To receive information regarding updates and new products,

please contact your local dealer or visit the Trimble website

at lwww.trimble.com/register. Upon registration you may

select the newsletter, upgrade or new product information

you desire.

Notices

Class B Statement – Notice to Users. This equipment has

been tested and found to comply with the limits for a Class B

digital device, pursuant to Part 15 of the FCC rules. These

limits are designed to provide reasonable protection against

harmful interference in a residential installation. This

equipment generates, uses, and can radiate radio frequency

energy and, if not installed and used in accordance with the

instructions, may cause harmful interference to radio

communication. However, there is no guarantee that

interference will not occur in a particular installation. If this

equipment does cause harmful interference to radio or

television reception, which can be determined by turning the

equipment off and on, the user is encouraged to try to correct

the interference by one or more of the following measures:

– Reorient or relocate the receiving antenna.

– Increase the separation between the equipment and the

receiver.

– Connect the equipment into an outlet on a circuit

different from that to which the receiver is connected.

– Consult the dealer or an experienced radio/TV technician

for help.

Changes and modifications not expressly approved by the

manufacturer or registrant of this equipment can void your

authority to operate this equipment under Federal

Communications Commission rules.

Canada

This digital apparatus does not exceed the Class B limits for

radio noise emissions from digital apparatus as set out in the

radio interference regulations of the Canadian Department

of Communications.

Le présent appareil numérique n’émet pas de bruits

radioélectriques dépassant les limites applicables aux

appareils numériques de Classe B prescrites dans le

règlement sur le brouillage radioélectrique édicté par le

Ministère des Communications du Canada.

Europe

This product has been tested and found to comply

with the requirements for a Class B device pursuant

to European Council Directive 89/336/EEC on EMC,

thereby satisfying the requirements for CE Marking and sale

within the European Economic Area (EEA). Contains

Infineon radio module ROK 104001. These requirements are

designed to provide reasonable protection against harmful

interference when the equipment is operated in a residential

or commercial environment.

Taiwan – Battery Recycling Requirements

The product contains a removable Lithium-ion

battery. Taiwanese regulations require that waste

batteries are recycled.

Notice to Our European Union Customers

For product recycling instructions and more information,

please go to www.trimble.com/environment/summary.html.

Recycling in Europe: To recycle Trimble WEEE

(Waste Electrical and Electronic Equipment,

products that run on electrical power.), Call +31 497

53 24 30, and ask for the "WEEE Associate". Or, mail

a request for recycling instructions to:

Trimble Europe BV

c/o Menlo Worldwide Logistics

Meerheide 45

5521 DZ Eersel, NL

AgGPS 332 GPS Receiver User Guide v

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . 1

Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

About the Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Your Comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . 3

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Receiver Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Receiver Input/Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

GPS Positioning Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

RTK GPS positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Differential GPS positioning (DGPS). . . . . . . . . . . . . . . . . . . . . . 10

Autonomous GPS positioning . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Sources of Error in GPS Positioning . . . . . . . . . . . . . . . . . . . . . . 12

Coordinate systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Satellite DGPS mode status indicators . . . . . . . . . . . . . . . . . . . . 15

Receiver input / output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

DGPS accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Receiving Beacon DGPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3 Connecting the Receiver . . . . . . . . . . . . . . . 19

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Contents

vi AgGPS 332 GPS Receiver User Guide

Optional components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Mounting the Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Choosing a location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Environmental conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Electrical interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Connecting to an External Device . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

The receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

The antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Routing and Connecting the Antenna Cable . . . . . . . . . . . . . . . . . . . . . 26

Connecting to the EZ-Guide Plus System . . . . . . . . . . . . . . . . . . . . . . . 29

Connecting to the EZ-Steer Assisted Steering System . . . . . . . . . . . . . . . 30

Connecting to a Laptop Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Connecting to a Windows Handheld Computer . . . . . . . . . . . . . . . . . . 32

4 Getting Started . . . . . . . . . . . . . . . . . . . . 33

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Navigating the Menus and Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Menu System Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Display-only fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Multiple-choice fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Text fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

The Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Satellite DGPS mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Satellite and SBAS DGPS mode . . . . . . . . . . . . . . . . . . . . . . . . . 40

Beacon DGPS mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Updating the Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

5 Configuring the Receiver . . . . . . . . . . . . . . . 45

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Configuring Differential GPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Contents

AgGPS 332 GPS Receiver User Guide vii

OmniSTAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

WAAS/EGNOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Configuring the AgGPS Receiver to Operate in Beacon Mode . . . . . . . . . . 49

Configuring the AgGPS Receiver to Operate in RTK Mode . . . . . . . . . . . . 50

Configuring the Communication Ports . . . . . . . . . . . . . . . . . . . . . . . . 50

Configuring input/output communication. . . . . . . . . . . . . . . . . . 51

Display Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Installing Passcodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

FlashLoader200 utility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

6 Troubleshooting . . . . . . . . . . . . . . . . . . . . 59

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Problems with GPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Interference Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Problems with the GPS Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Problems with the FlashLoader200 Utility . . . . . . . . . . . . . . . . . . . . . . 65

A Cables and Connectors . . . . . . . . . . . . . . . . 67

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Port A and Port B Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Standard Power/Data Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

B Specifications . . . . . . . . . . . . . . . . . . . . . 71

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

AgGPS 332 Receiver Physical Characteristics . . . . . . . . . . . . . . . . . . . . 72

GPS Channels Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

L-Band Satellite Differential Correction Receiver with OmniSTAR Support . 74

Receiver Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

DGPS Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Dual-Frequency Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Beacon Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Contents

viii AgGPS 332 GPS Receiver User Guide

C NMEA-0183 Messages . . . . . . . . . . . . . . . . . 77

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

NMEA-0183 Message Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Symbols and delimiters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Checksum values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Field formats. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Null fields. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Talker ID codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

Latitude and longitude values . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Time values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Reading NMEA string format . . . . . . . . . . . . . . . . . . . . . . . . . . 81

NMEA Message Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

GGA (GPS Fix Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

GLL (Position Data) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

GRS (GPS Range Residuals). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

GSA (GPS DOP and Active Satellites) . . . . . . . . . . . . . . . . . . . . . . . . . 87

GST (GPS PRN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

GSV (GPS Satellites in View) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

MSS (Beacon Receiver Signal Status). . . . . . . . . . . . . . . . . . . . . . . . . . 90

RMC (Recommended Minimum Specific GPS Data) . . . . . . . . . . . . . . . . 91

VTG (Course Over Ground and Ground Speed) . . . . . . . . . . . . . . . . . . . 93

XTE (Cross-Track Error). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

ZDA (Time and Date) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

PTNLEV Proprietary (Event Marker). . . . . . . . . . . . . . . . . . . . . . . . . . 96

PTNLID Proprietary (Trimble Receiver ID) . . . . . . . . . . . . . . . . . . . . . . 97

PTNLDG Proprietary (Trimble DGPS Receiver Status) . . . . . . . . . . . . . . 98

PTNL,GGK (Time, Position, Position Type, and DOP) . . . . . . . . . . . . . . 100

PTNLSM Proprietary (RTCM Special) . . . . . . . . . . . . . . . . . . . . . . . . 101

D Third-Party Interface Requirements . . . . . . . . 103

Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Index . . . . . . . . . . . . . . . . . . . . . . . . . 109

CHAPTER

1

AgGPS 332 GPS Receiver User Guide 1

Introduction 1

In this chapter:

QWelcome

QAbout the Product

QRelated Information

QTechnical Assistance

QYour Comments

1 Introduction

2 AgGPS 332 GPS Receiver User Guide

1.1 Welcome

This manual describes how to install and configure the Trimble®

AgGPS® 332 receiver.

Even if you have used other Global Positioning System (GPS) products

before, Trimble recommends that you spend some time reading this

manual to learn about the special features of this product. If you are not

familiar with GPS, visit the Trimble website (www.trimble.com) for an

interactive look at Trimble and GPS.

1.2 About the Product

The AgGPS 332 receiver is an innovative GPS receiver that provides “the

ultimate choice” for Agricultural GPS positioning. Scalable accuracy

levels allow the option of SBAS (Satellite Based Augmentation System),

Beacon, OmniSTAR-VBS/XP/HP, and RTK (Real-Time Kinematic). The

AgGPS 332 can provide the level of accuracy needed for any operation.

1.3 Related Information

Sources of related information include the following:

•Release notes – the release notes describe new features of the

product, information not included in the manuals, and any

changes to the manuals.

•Trimble training courses – Consider a training course to help

you use your GPS system to its fullest potential. For more

information, go to the Trimble website at

www.trimble.com/training.shtml.

1.4 Technical Assistance

If you have a problem and cannot find the information you need in the

product documentation, contact your local dealer.

1.5 Your Comments

Your feedback about the supporting documentation helps us to

improve it with each revision. E-mail your comments to

ReaderFeedback@trimble.com.

APPENDIX

2

AgGPS 332 GPS Receiver User Guide 3

Overview 2

In this chapter:

QIntroduction

QReceiver Connections

QReceiver Input/Output

QGPS Positioning Methods

2 Overview

4 AgGPS 332 GPS Receiver User Guide

2.1 Introduction

This chapter describes the AgGPS 332 receiver and gives an overview

of GPS, DGPS, and related information.

The AgGPS 332 receiver

combines high-performance GPS

reception with a DGPS-capable

receiver in a lightweight, durable

housing. The AgGPS 332 receiver

also contains the ultimate choice

in technology enabling

WAAS/EGNOS, OmniSTAR, or

Coast Guard Beacon Tower

real-time differential capabilities.

When used with a Real-Time

Kinematic (RTK) base station,

the AgGPS 332 receiver provides RTK positioning for high-accuracy,

centimeter-level applications. For physical specifications, see

Appendix B, Specifications..

You can use the receiver with a variety of farming equipment, including:

•AgGPS EZ-Guide® Plus lightbar guidance system

•AgGPS EZ-Steer™ assisted steering system

•AgGPS Autopilot™ automated steering system

•yield monitors

•variable-rate planters

•spray application controllers

•portable field computers for field mapping and soil sampling

•any device that requires a GPS input

AgGPS 332 GPS Receiver User Guide 5

Overview 2

21.1 Standard Features

A standard AgGPS 332 receiver provides the following features:

•10 Hz (10 positions per second) output rate

•12 GPS (C/A-code, L1and L2) tracking channels, code carrier

channels

•Submeter differential accuracy (RMS), assuming at least five

satellites and a PDOP (Position Dilution of Precision) of less than

four1 (when used with SBAS correction)

•LED display

•Outputs a 1 PPS (pulse per second) strobe signal on both ports.

This signal enables an external instrument to synchronize its

internal time with a time derived from the very accurate GPS

system time.

•WAAS differential correction2

•Beacon differential correction2

•OmniSTAR VBS correction compatibility

•RTK positioning compatibility

•EVEREST™ multipath rejection technology

•Two ports that support both CAN 2.0B and RS-232:

–CAN:

J1939 and NMEA 2000 messages

Note – The AgGPS 332 receiver is ISO 11783 compliant. It

supports some ISO 11783 messages.

– RS-232 :

NMEA-0183 output: GGA, GLL, GRS, GST, GSA, GSV, MSS,

RMC, VTG, ZDA, XTE (the default NMEA messages are

GGA, GSA, VTG, and RMC).

Note – PTNLDG, PTNLEV, PTNLGGK, PTNLID, and PTNLSM

are Trimble proprietary NMEA output messages.

RTCM SC-104 output.

Trimble Standard Interface Protocol (TSIP) input and

output.

1. When used with SBAS correction.

2. Where available.

2 Overview

6 AgGPS 332 GPS Receiver User Guide

2.2 Receiver Connections

Figure 2.1 shows the connector ports on the AgGPS 332 receiver.

Figure 2.1 AgGPS 332 receiver connector ports

The two connectors (Port A and Port B) can perform the following

functions:

•accept power

•accept TSIP, RTCM, ASCII, and (if enabled) CMR inputs

•output RTCM, TSIP, and NMEA messages

•output 1 PPS signals

•provide support for the J1939 (CAN) serial bus

For more information about the inputs, outputs, and LCD display, see

the information in the rest of this section.

AgGPS 332 GPS Receiver User Guide 7

Overview 2

2.3 Receiver Input/Output

The AgGPS 332 receiver data/power cable (P/N 30945) connects to a

receiver connector port to supply power. It also enables the following

data exchanges:

•TSIP, RTCM, and ASCII input from an external device

The receiver is able to receive ASCII data from an external

device, convert this data into an NMEA message, and export the

message to another device. TSIP command packets configure

and monitor GPS and DGPS parameters. The receiver is also able

to accept RTCM data from an external device, such as a radio.

•CMR input from an external device

If the receiver is to be used in RTK mode, set the port that is

connected to the radio to the RtkLnk protocol. This protocol

enables the receiver to receive CMR messages.

•TSIP and NMEA output to an external device

When you are using an external radio, the receiver can also

receive DGPS corrections.

NMEA is output when the receiver is exporting GPS position

information to an external device, such as a yield monitor, or to a

mapping software program.

For more information on the National Marine Electronics

Association (NMEA) and Radio Technical Commission for

Maritime Services (RTCM) communication standard for GPS

receivers, go to the following websites:

–www.nmea.org

– www.rtcm.org

On the Trimble website (www.trimble.com), refer to the

document called NMEA-0183 Messages Guide for AgGPS

Receivers.

2 Overview

8 AgGPS 332 GPS Receiver User Guide

•1 PPS output

To synchronize timing between external instruments and the

internal clock in the receiver, the connection port outputs a

strobe signal at 1 PPS (pulse per second). To output this signal,

the receiver must be tracking satellites and computing GPS

positions.

•J1939 (CAN) bus

Both connection ports on the receiver support the J1939

Controller Area Network (CAN) bus protocol. This protocol

standardizes the way multiple microprocessor-based electronic

control units (ECUs) communicate with each other over the

same pair of wires. It is used in off-highway machines, such as

those used in agriculture, construction, and forestry.

For more information, go to the Society of Automotive Engineers

(SAE) International website at www.sae.org/servlets/index.

•ISO 11783 messages

Both CAN ports support some ISO 11783 messages.

Position output format

The AgGPS receiver outputs positions in Degrees, Minutes, and

Decimal Minutes (DDD°MM.m'). This is the NMEA standard format

and is commonly used worldwide for data transfer between electronic

equipment.

AgGPS 332 GPS Receiver User Guide 9

Overview 2

2.4 GPS Positioning Methods

GPS positioning systems are used in different ways to provide different

levels of accuracy. Accuracy is measured in absolute terms (you know

exactly where you are in a fixed reference frame).

Table 2.1 summarizes the GPS positioning methods. Imperial units in

this table are rounded to two decimal places. The values shown are

2sigma.

For more information about each positioning method, see below.

24.1 RTK GPS positioning

The AgGPS 332 receiver uses the RTK positioning method to achieve

centimeter-level accuracy. To use the RTK method, you must first set

up a base station. The base station uses a radio link to broadcast RTK

corrections to one or more rover receivers. The AgGPS 332 receiver is a

rover receiver, so another compatible receiver, such as a Trimble

MS750™ or AgGPS 214 GPS receiver, must be used as the base station.

Table 2.1 Absolute accuracy of GPS positioning method

GPS positioning

method

Corrections used Approximate absolute accuracy

Real-Time Kinematic

(RTK) GPS

Trimble CMR

corrections broadcast

by a local base station

2.5 cm (0.98 in) + 2 ppm horizontal accuracy,

3.7 cm (1.46 in) + 2 ppm vertical accuracy

OmniSTAR HP

Differential GPS

OmniSTAR HP 10 cm (3.94 in) after the signal has fully

converged1

1Convergence time can vary, depending on the environment. Time to the first fix (submeter accuracy) is

typically <30 seconds; time to the first high accuracy fix (<10 cm accuracy) is typically <30 minutes.

OmniSTAR XP

Differential GPS

20 cm (7.87 in) after the signal has fully

Differential GPS converged

Satellite Differential GPS OmniSTAR VBS 78 cm (30.71 in)

Radio Beacon Coast Guard radio

beacon towers

.4 inch through 12 inch

(10 cm through 30 cm) RMS 15 min

Satellite Differential GPS WAAS/EGNOS 95 cm (37.40 in)

2 Overview

10 AgGPS 332 GPS Receiver User Guide

A transmitter in the base station sends the corrections through a radio

link to the rover radio, which sends the corrections to the AgGPS 332

receiver. The rover receiver uses RTK corrections from the base station

to calculate its position to centimeter-level accuracy. As part of this

process, the rover receiver must calculate an initialization. This takes a

few seconds. While the receiver is initializing, an RTK Float solution is

generated. Once initialized, an RTK Fixed solution is generated. It is the

RTK Fixed solution that provides centimeter-level accuracy.

The parts per million (ppm) error is dependent on the distance

(baseline length) between the base and rover receiver. For example, if

the distance is 10 km, a 2 ppm error equals 20 mm.

For more information about RTK positioning, go to the Trimble website

at www.trimble.com/gps/.

24.2 Differential GPS positioning (DGPS)

For differential positioning, the AgGPS 332 receiver uses corrections

from SBAS (WAAS/EGNOS)/OmniSTAR satellites and Radio Beacons.

These differential systems use special algorithms to provide differential

corrections that allow the rover receiver to calculate its position more

accurately.

Free corrections

WAAS/EGNOS corrections are free in North America and Europe.

For more information about WAAS, go to the Federal Aviation

Administration website at

http://gps.faa.gov/Programs/WAAS/waas.htm.

For more information about EGNOS, go to the European Space Agency

website at

www.esa.int/export/esaSA/GGG63950NDC_navigation_0.html.

Radio Beacon corrections are available free worldwide. For more

information about the Coast Guard Beacon, go to

www.navcen.uscg.gov/Default.htm.

AgGPS 332 GPS Receiver User Guide 11

Overview 2

Subscription-based corrections

The AgGPS 332 receiver uses OmniSTAR XP/HP or OmniSTAR VBS

differential corrections in the same way that it uses WAAS/EGNOS

corrections but are provided on a subscription basis.

The corrections that are produced by OmniSTAR XP/HP algorithms are

more accurate than the corrections that are produced by OmniSTAR

VBS algorithms. The accuracy of the positions reported using

OmniSTAR HP/XP increases with the time that has elapsed since the

instrument was turned on. This process is called convergence.

Convergence to where the error is estimated to be below 30 cm

(approximate 12 inches) typically takes around 20 minutes. Factors that

influence the time to convergence include the environment, the

geographical location and for OmniSTAR HP, the distance to the

closest OmniSTAR corrections base station. OmniSTAR is continually

improving this service. OmniSTAR XP is not dependent on distance to

base station

For more information about OmniSTAR, go to the OmniSTAR website

at www.omnistar.com. Alternatively, call 888 883 8476 (USA or Canada).

For information about activating an OmniSTAR subscription, go to the

OmniSTAR website (www.omnistar.com) or call 888-883-8476 (USA or

Canada).

24.3 Autonomous GPS positioning

Autonomous GPS positioning uses no corrections. The rover receiver

calculates its position using only the GPS signals it receives. This

method does not have high absolute accuracy, but the relative accuracy

can be comparable depending on geographic location and overall

environment.

2 Overview

12 AgGPS 332 GPS Receiver User Guide

24.4 Sources of Error in GPS Positioning

The GPS positioning method influences the accuracy of the GPS

position that is output by the AgGPS 332 receiver. The factors described

in Table 2.2 also affect GPS accuracy.

Table 2.2 Factors that influence the accuracy of GPS positions

Condition Optimum

value

Description

Atmospheric

effects

GPS signals are degraded as they travel through the

ionosphere. The error introduced is in the range of 10 meters.

The error is removed by using a differential or RTK positioning

method.

Number of

satellites used

> 5 To calculate a 3D position (latitude and longitude, altitude,

and time), four or more satellites must be visible. To calculate a

2D position (latitude and longitude, and time), three or more

satellites must be visible. For RTK positioning, five satellites are

needed for initialization. Once initialized, four or more

satellites provide RTK positions. The number of visible satellites

constantly changes and is typically in the range 5 through 9.

The AgGPS receiver can track up to 12 satellites simultaneously.

Note – To see when the maximum number of GPS satellites are

available, use the Trimble Planning software and a current

ephemeris (satellite history) file. Both files are available free

from the Trimble website at www.trimble.com.

Maximum PDOP < 4 Position Dilution of Precision (PDOP) is a unitless, computed

measurement of the geometry of satellites above the current

location of the receiver. A low PDOP means that the

positioning of satellites in the sky is good, and therefore good

positional accuracy is obtained.

Signal-to-noise

ratio

> 6 Signal-to-noise ratio (SNR) is a measure of the signal strength

against electrical background noise. A high SNR gives better

accuracy.

Normal values are:

•GPS 6

•WAAS 3+

•Beacon 12+

•OmniSTAR XP/HP/VBS 6+

AgGPS 332 GPS Receiver User Guide 13

Overview 2

Minimum

elevation

> 10 Satellites that are low on the horizon typically produce weak

and noisy signals and are more difficult for the receiver to

track. Satellites below the minimum elevation angle are not

tracked.

Multipath

environment

Low Multipath errors are caused when GPS signals are reflected off

nearby objects and reach the receiver by two or more different

paths. The receiver incorporates the EVEREST multipath

rejection option.

RTCM-compatible

corrections

These corrections are broadcast from a Trimble 4000RSi, or

equivalent reference station.

RTK base station

coordinate

accuracy

For RTK positioning, it is important to know the base station

coordinates accurately. Any error in the position of the base

station affects the position of the rover; every 10 m of error in

a base station coordinate can introduce up to 1 ppm scale error

on every measured baseline. For example, an error of 10 m in

the base station position produces an error of 10 mm over a

10 km baseline to the rover.

For more information about how to make sure the position of

your base station is accurate, refer to the manual for your base

station receiver.

Multiple RTK

base stations

If you are using several base stations to provide RTK

corrections to a large site area, all base stations must be

coordinated relative to one another. If they are not, the

absolute positions at the rover will be in error. For more

information about how to use several base stations to cover

your site, contact your local Trimble Reseller.

Table 2.2 Factors that influence the accuracy of GPS positions (continued)

Condition Optimum

value

Description

2 Overview

14 AgGPS 332 GPS Receiver User Guide

24.5 Coordinate systems

Geographic data obtained from different sources must be referenced to

the same datum, ellipsoid, and coordinate format. Different formats

provide different coordinate values for any geographic location. In

North America, the datums NAD-27 and NAD-83 are commonly used in

Agricultural mapping applications.

The AgGPS 332 receiver outputs position coordinates in several datums

and ellipsoids depending on the GPS positioning method being used.

See Table 2.3.

For more information, go to the National Geodetic Survey website at

www.ngs.noaa.gov/faq.shtml#WhatDatum.

Table 2.3 DGPS coordinate systems

GPS positioning method Datum Ellipsoid

None – Autonomous mode WGS-84 1WGS-84

OmniSTAR VBS North American Beams NAD-83 2GRS-80

OmniSTAR VBS Rest of World Beams ITRF 3GRS-80

OmniSTAR HP ITRF 2000 ITRF 2000

WAAS Beams WGS-84 WGS-84

Beacon NAD-83 NAD-83

OmniSTAR XP ITRF 2000 ITRF 2000

RTK WGS-84 WGS-84

1 World Geodetic System (WGS) 1984. Datum and ellipsoid.

2 North American Datum (NAD) 1983. Equivalent to WGS-84 in North

America.

3 International Terrestrial Reference Frame (ITRF). Contact the DGPS provider for details.

AgGPS 332 GPS Receiver User Guide 15

Overview 2

24.6 Satellite DGPS mode status indicators

When the receiver is in Satellite mode, the second line of the Home

screen displays the status indicators shown in Figure 2.2.

Figure 2.2 Satellite DGPS mode status indicators

Table 2.4 shows the possible satellite differential mode indicators.

Table 2.5 explains the signal-to-noise ratio values for both Satellite

and WAAS/EGNOS DGPS modes.

Table 2.4 Satellite differential mode status indicators

Indicator Description

S ####.### S/N ## Operating in Satellite Differential mode.

S SRCH ###.## Searching for Satellite Differential signal.

S TRCK ####.## Tracking satellite without acquiring signal lock.

Table 2.5 Signal-to-noise values

Value Description

Below 4 Unusable

4–8 Fair

>8 Excellent

S 1556.2550 ÷ø10

Receiver is using Satellite DGPS corrections.

Frequency for tracked DGPS satellite. Available

frequencies vary according to your location and

DGPS service provider.

Signal-to-noise ratio of

DGPS signal, see Table 2.5.

2 Overview

16 AgGPS 332 GPS Receiver User Guide

24.7 Receiver input / output

The receiver is able to output RTCM in base station mode. When you

are using an external radio, it can also receive DGPS corrections. NMEA

is output when the receiver is exporting GPS position information to an

external device, such as a yield monitor or to a mapping software

program.

24.8 DGPS accuracy

Submeter accuracy from the AgGPS 332 receiver utilizing differential

correction is best achieved under the conditions described in Table 2.6.

Table 2.6 DGPS accuracy

Condition Optimum

Value

Description

To calculate a 3D position (latitude and longitude, altitude, and

time), four or more satellites must be visible.

To calculate a 2D position (latitude and longitude, and time),

three or more satellites must be visible.

The number of visible satellites constantly changes and is

typically in the range 5–9. Ag

to 12 satellites simultaneously.

Note – To see when the maximum number of GPS satellites

are available, use the Quickplan utility and a current

ephemeris (satellite history) file. Both files are available free

from: www.trimble.com/support_trl.asp?Nav=Collection-3627.

Maximum PDOP < 4 Position Dilution of Precision (PDOP) is a unitless, computed

measurement of the geometry of satellites above the

receiver’s current location.

Note – In some agricultural applications that do not require

high accuracy, a maximum PDOP of 12 or more can be used.

> 6 Signal-to-Noise ratio (SNR) is a measure of the satellite signal

strength against electrical background noise. A high SNR

gives better accuracy.

Minimum

Elevation

> 7.5 Satellite that are low on the horizon typically produce weak

and noisy signals and are more difficult for the receiver to

track. Satellites below the minimum elevation angle are not

tracked.

AgGPS 332 GPS Receiver User Guide 17

Overview 2

24.9 Receiving Beacon DGPS

To obtain free radiobeacon differential signals, the AgGPS 332 receiver

uses dual-channel, fully-automatic beacon receiver electronics and

tracks broadcasts that conform to the IALA (International Association

of Lighthouse Authorities) Standard. When you use beacon DGPS, the

receiver selects the closest of the 10 most powerful radiobeacons in the

vicinity. You can configure the receiver to search for particular station

frequencies, or use the EZ beacon feature to select local beacons.

The receiver continuously monitors the integrity of the data received

from the differential radiobeacons. If it finds unacceptable errors in the

data stream, the receiver automatically switches to a different

radiobeacon, if one is available.

Radiobeacon signal reception is generally not affected by:

•hilly or mountainous terrain

•tree canopy

•location of the receiver inside a canyon (the signal reception

depends on the proximity of the receiver to the transmitter)

Radiobeacon signal reception is affected to varying degrees, by:

•natural “noise”, such as lightning

•human-made “noise”, such as alternators, electric fan motors,

radio speakers, and high voltage power lines

Multipath

environment

Low Multipath errors are caused when GPS signals are reflected

off nearby objects and reach the receiver by two or more

different paths. The receiver incorporates the EVEREST

multipath reduction option.

RTCM-

compatible

corrections

These corrections are broadcast from a Trimble 4000RSi™ or

equivalent reference station.

Table 2.6 DGPS accuracy (continued)

2 Overview

18 AgGPS 332 GPS Receiver User Guide

•Sky wave interference with ground wave

During darkness, when the beacon tower is more than 240–

480 kilometers (150–300 miles) from the receiver, the sky wave

beacon signal may be reflected off the ionosphere. This causes

interference with the ground wave beacon signal. Self-jamming

at night may be a problem with stronger beacon stations.

•Geographic de-correlation

This phenomenon causes radiobeacon signal accuracy to

decrease as the distance between the beacon tower and the base

station increases. Ionospheric conditions can affect accuracy by

as much as 1 meter (3 feet) for every 100 km (60 miles).

CHAPTER

3

AgGPS 332 GPS Receiver User Guide 19

Connecting the Receiver 3

QIntroduction

QSystem Components

QMounting the Receiver

QConnecting to an External Device

QSystem Components

QRouting and Connecting the Antenna Cable

QConnecting to the EZ-Guide Plus System

QConnecting to the EZ-Steer Assisted Steering System

QConnecting to a Laptop Computer

QConnecting to a Windows Handheld Computer

3 Connecting the Receiver

20 AgGPS 332 GPS Receiver User Guide

3.1 Introduction

This chapter describes how to check the equipment that you have

received, set up the receiver, and connect the receiver to another

device.

3.2 System Components

Check that you have received all components for the AgGPS system

that you have purchased. If any containers or components are

damaged, immediately notify the shipping carrier. Table 3.1 and

Table 3.2 lists the components.

32.1 Optional components

You may also have ordered the following item:

For ordering and pricing details, contact your local Trimble Reseller.

Table 3.1 AgGPS 332 receiver (P/N 55580-xx)

Quantity Description

1 AgGPS 332 DGPS receiver (P/N 55580)

1 Power Data Cable (P/N 30945)

1AgGPS 332 GPS Receiver User Guide

(this manual, P/N 56370-00-ENG)

1 Warranty Activation Card (P/N 25110-00)

1 OmniSTAR Activation Card (P/N 33965)

1 Antenna (P/N 33580-00 or P/N 56981)

Table 3.2 Receiver option

Quantity Description

1 RTK capability (P/N 51264)

1 OmniSTAR XP/HP upgrade (P/N 55951)

AgGPS 332 GPS Receiver User Guide 21

Connecting the Receiver 3

3.3 Mounting the Receiver

CWARNING – For continued protection against the risk of fire, the power

source (lead) to the model AgGPS 332 receiver should be provided with a

10 A (maximum) fuse.

33.1 Choosing a location

When choosing a location, consider the following:

Mount the receiver:

•on a flat surface along the centerline of the vehicle

•in any convenient location that is within 5.5 meters (18 ft) of the

port on the external instrument; if necessary, use the optional

extension cable to connect the receiver and external device

Note – If you are using a Trimble AgGPS Autopilot system, refer to

the installation instructions that are provided with the Autopilot.

•at the highest point on the vehicle, with no metal surfaces

blocking the receiver’s view of the sky

•in such a way that it is not damaged when you drive the machine

into a shed or storage area

Do not mount the receiver:

•close to stays, electrical cables, metal masts, CB radio antennas,

cellular phone antennas, air-conditioning units (machine cab

blower fan), or machine accessory lights

•near transmitting antennas, radar arrays, or satellite

communication equipment

•near areas that experience high vibration, excessive heat,

electrical interference, and strong magnetic fields

Note – A metal combine grain tank extension can block satellites.

3 Connecting the Receiver

22 AgGPS 332 GPS Receiver User Guide

33.2 Environmental conditions

Although the receiver has a waterproof housing, you should install it in

a dry location. To improve the performance and long-term reliability of

the receiver, avoid exposure to extreme environmental conditions,

including:

•water

•excessive heat (> 70 °C or 158 °F)

•excessive cold (< –30 °C or –22 °F)

•high vibration

•corrosive fluids and gases

33.3 Electrical interference

As far as possible, when you install the receiver, you should avoid

placing it near sources of electrical and magnetic noise, such as:

•gasoline engines (spark plugs)

•computer monitor screens

•alternators, generators, or magnetos

•electric motors (blower fans)

•equipment with DC-to-AC converters

•switching power supplies

•radio speakers

•high-voltage power lines

•CB radio antennas

•cellular phone antennas

•machine accessory lights

AgGPS 332 GPS Receiver User Guide 23

Connecting the Receiver 3

3.4 Connecting to an External Device

After installing the receiver and connecting the appropriate cabling,

you can connect the receiver to various external devices. For example:

Figure 3.1 shows how to connect the receiver to an external device

using the Power data cable.

Figure 3.1 Standard power/data cable connections

To connect the AgGPS 332 receiver to ... use the cable ...

an EZ-Guide Plus system P/N 30945

an Autopilot system P/N 54609

a Field computer P/N 30945

a Yield monitor P/N 30945

a Trimble SiteNet™ radio, for RTK positioning P/N 39941

multiple devices (access to ports A, B, and C) P/N 37382

+

-

3 Connecting the Receiver

24 AgGPS 332 GPS Receiver User Guide

When routing the cable from the receiver to the external device, avoid:

•sharp objects

•kinks in the cable

•hot surfaces (exhaust manifolds or stacks)

•rotating or moving machinery parts

•sharp or abrasive surfaces

•door and window jams

•corrosive fluids or gases

When the cable is safely routed and connected to the receiver, use

tie-wraps to secure it at several points, particularly near the base of the

receiver, to prevent straining the connection. Coil any slack cable,

secure it with a tie-wrap, and tuck it into a safe place.

The external device may have to be configured to work with the AgGPS

receiver. The configuration tools for the external device should be

provided with the device. For more information about configuring the

receiver, see Chapter 5, Configuring the Receiver. For information

about connecting a particular external device, refer to the manual for

that device or contact your local Trimble Reseller.

AgGPS 332 GPS Receiver User Guide 25

Connecting the Receiver 3

3.5 System Components

Mount the receiver on a level, flat surface. To mount it on a ceiling,

contact your local Trimble Reseller for the appropriate bracket. Place

the antenna upright with the magnetic base on a flat metal surface.

Note – A metal combine grain tank extension can block satellites.

Figure 3.2 shows the recommended location for sprayer boom

applications.

Figure 3.2 AgGPS 332 receiver antenna mounting for ground sprayer

boom applications

35.1 The receiver

To mount the AgGPS 332 receiver:

1. Drill four holes in the mounting surface. Use the slotted holes in

the mounting brackets as a template.

2. Use screws to secure the brackets to the mounting surface.

Boom centerline

Application boom

Antenna

3 Connecting the Receiver

26 AgGPS 332 GPS Receiver User Guide

Note – If you use machine screws, tap the mounting holes to fasten the

receiver to the mounting surface. Trimble recommends that you use 8-32

UNF socket head cap screws. Alternatively, use self-tapping screws.

30.1 The antenna

Mount the antenna where it is safe from damage during normal

operation.

3.1 Routing and Connecting the Antenna Cable

A 5.5 m (18 ft) antenna cable (P/N 32608) is included with the receiver.

See Figure 3.3. One end of the antenna cable features a right-angle

connector. The opposite end features a straight connector. Connect the

right-angle connector to the antenna; then route the cable to the

receiver.

Figure 3.3 Antenna cable connections

Antenna cable

P/N 32608

Antenna cable

P/N 32608

SPOT antennaorZ+ antenna

AgGPS 332 GPS Receiver User Guide 27

Connecting the Receiver 3

When routing the antenna cable, avoid the following hazards:

•sharp objects

•kinks in the cable

•hot surfaces (exhaust manifolds or stacks)

•rotating or moving machinery parts

•sharp or abrasive surfaces

•door and window jams

•corrosive fluids or gases

After routing the cable, connect it to the receiver. Use tie-wraps to

secure the cable at several points along the route. One tie-wrap is

required to secure the cable near the base of the antenna. This provides

strain relief for the antenna cable connection.

When the cable is secured, coil any slack. Secure the coil with a

tie-wrap and tuck it into a safe place.

BTip – Use the tape (coax tape seal) that is provided with the antenna to

seal the antenna connector at the antenna. The tape prevents moisture

from entering the connection.

After installing the receiver and antenna, connect and route the

power/data cable (P/N 30945). The receiver can be powered by a

vehicle or by a customer-supplied 10–32 V DC power source.

3 Connecting the Receiver

28 AgGPS 332 GPS Receiver User Guide

Figure 3.4 shows how to connect the receiver to an external device

using the 5.5 m (18 ft) standard power/data cable.

Figure 3.4 Standard power/data cable connections

Plug the:

•right-angle connector into the receiver

•straight 9-pin connector into the external device

When routing the cable from the receiver to the external device, avoid

the hazards listed on page 27.

When the cable is safely routed and connected to the receiver, use

tie-wraps to secure it at several points, particularly near the base of the

receiver to prevent straining the connection. Coil any slack cable,

secure it with a tie-wrap and tuck it into a safe place.

+

-

Ground -ve Black

9-pin port

Connect cable

Connect antenna

cable to coaxial connection

P/N 30945 to Port A

Power +ve Red

AgGPS 332 GPS Receiver User Guide 29

Connecting the Receiver 3

3.2 Connecting to the EZ-Guide Plus System

Figure 3.5 and Figure 3.6 show how to connect the AgGPS 332 receiver

to the AgGPS EZ-Guide Plus system.

Figure 3.5 Connecting the AgGPS 332 receiver to the AgGPS EZ-Guide

Plus system without the remote control

Figure 3.6 Connecting the AgGPS 332 receiver to the AgGPS EZ-Guide

Plus system with the remote control

P/N 30945

To power

To power

P/N 52033

To power

P/N 30945

To power

3 Connecting the Receiver

30 AgGPS 332 GPS Receiver User Guide

3.3 Connecting to the EZ-Steer Assisted Steering

System

Figure 3.7 and Figure 3.8 show how to connect the AgGPS 332 receiver

to the AgGPS EZ-Steer assisted steering system.

Figure 3.7 Connecting the AgGPS 332 receiver to the AgGPS EZ-Steer assisted steering

system with the remote control

Figure 3.8 Connecting the AgGPS 332 receiver to the AgGPS EZ-Steer assisted steering

system with the remote control and Pocket PC for field mapping capability

T

r

i

m

b

l

e

P/N 52764

P/N 30945

To power

P/N 52763

To power

T

r

i

m

b

l

e

To power

P/N 30945

P/N 46635

P/N 52764

To power

P/N 30945

P/N 52033

P/N 52763

AgGPS 332 GPS Receiver User Guide 31

Connecting the Receiver 3

3.4 Connecting to a Laptop Computer

Figure 3.9 shows how to connect the receiver power/data cable to a

laptop computer.

Figure 3.9 Connecting the receiver to a laptop computer

9-pin port

Connect cable

P/N 30945 to Port A

Connect antenna cable

to Port B

3 Connecting the Receiver

32 AgGPS 332 GPS Receiver User Guide

3.5 Connecting to a Windows Handheld Computer

Figure 3.10 shows how to connect the receiver power/data cable to a

Windows CE handheld computer.

Note – To connect the receiver to a Compaq iPAQ handheld computer,

you require a RS232 9-pin serial cable (PN 236251-B21). This cable is

available from Compaq.

Figure 3.10 Connecting the receiver to a Windows CE handheld computer

Windows CE

cable

Null modem

adaptor

9-pin connector

Ground -ve Black

Power +ve Red

Connect cable

Connect antenna cable

to Port B

P/N 30945 to Port A

CHAPTER

4

AgGPS 332 GPS Receiver User Guide 33

Getting Started 4

In this chapter:

QIntroduction

QFront Panel

QNavigating the Menus and Screens

QMenu System Fields

QThe Home Screen

QUpdating the Firmware

4 Getting Started

34 AgGPS 332 GPS Receiver User Guide

4.1 Introduction

This chapter describes how to set up and begin using the AgGPS 332

receiver. It includes an overview of the AgGPS menu system.

4.2 Front Panel

The AgGPS 332 receiver includes an integrated display and keypad for

accessing the internal AgGPS menu system. Use the menus and screens

in this system to configure the receiver settings and review receiver

status. To view the entire AgGPS menu system, go to the Trimble

website (www.trimble.com/aggps332_ts.asp).

Figure 4.1 shows the LCD display and keypad on the AgGPS 332

receiver front panel.

Figure 4.1 The AgGPS 332 receiver front panel

AgGPS 332 GPS Receiver User Guide 35

Getting Started 4

4.3 Navigating the Menus and Screens

Note – Use a menu to navigate to screens or other menus. Use a screen to

view the receiver status or to change a configuration setting.

The top level of the menu system consists of the Home, Status, and

Configuration menus. Each of these has one or more lower level menus

(sub-menu) which you can use to access screens for selecting options,

viewing status information, and entering data. For a map showing the

full menu system, go to the Trimble website

(www.trimble.com/aggps332_ts.asp).

When you are using the receiver front panel keypad to navigate the

menu system, press 2+1 simultaneously to move to the previous

menu. Press and hold (or press repeatedly) 2+1 simultaneously to

return to the Home screen.

4 Getting Started

36 AgGPS 332 GPS Receiver User Guide

Figure 4.2 shows the structure of a typical sub-menu, for example

Display Options.

Figure 4.2 Typical menu structure

Press 2 or 1 to move between screens. Within screens, select

options, view receiver status, or enter data. When Ð appears in a

screen, press 4 to perform the action specified for that screen.

Top-level menu screen

Sub-menu screen

Screens

Home

Display

Options

1

Contrast

Lock

Display

Language

Units

Clear

Memory

Exit

1

12

1

12

2

1

12

2

21

2

2

Update

Receiver

User Level

12

Exit screen indicates end of the menu

AgGPS 332 GPS Receiver User Guide 37

Getting Started 4

4.4 Menu System Fields

Fields in a screen contain status information or configuration settings.

The information or settings appear in fields that are:

•display-only

•multiple-choice

•text

44.1 Display-only fields

A display-only field shows status information and other data that is

automatically generated by the receiver or acquired from satellite

signals. You cannot edit this field. Examples include fields that display

the DGPS data on the Home screen and the fields in the screen in

Figure 4.3, which show details of the current receiver options.

Figure 4.3 Example of a display-only field

44.2 Multiple-choice fields

In a mulitple-choice field, you select one option from a list. Only one

option can appear in the field at one time. Press 3 to select a

multiple-choice field, the press 2 or 1 to move through the list.

When the required option appears, press 4 to select it and save the

changes.

Examples include the two multiple-choice fields that appear in the EZ

Sat DGPS Configuration screen (see Figure 4.4). These are the fields

which list available satellite providers, and satellite coverage beams.

Receiver options details field

4 Getting Started

38 AgGPS 332 GPS Receiver User Guide

Figure 4.4 Example of a multiple-choice field

44.3 Text fields

In these fields, you can enter only letters (alpha screens), only numbers

(numeric screens), or a combination of the two (alphanumeric screens):

1. Press 3 to select the field and activate the cursor on the first

letter or number.

2. Press 1 or 2 to move through the list of letters or numbers

until the required letter or number appears.

3. Press 3 to move to the next place in the field.

4. Repeat Step 2 through Step 3 to enter all required characters.

5. Press 4 to save the changes.

Service Provider field

Satellite Coverage Beam field

AgGPS 332 GPS Receiver User Guide 39

Getting Started 4

4.1 The Home Screen

One example of a numeric field appears in the Satellite Freq screen. You

manually enter the broadcast frequency of a satellite service provider.

See Figure 4.5.

Figure 4.5 Example of a numeric field

When you start the receiver, the Home screen appears. See Figure 4.6.

Figure 4.6 The Home Screen

You can leave this screen running during operation. It enables you to

monitor the receiver status. To return to the Home screen after viewing

other receiver menus and screens, press 5 one or more times.

The AgGPS 332 receiver is a combined Beacon and Satellite DGPS

receiver. The information that appears on the Home screen depends on

how the receiver is configured.

41.1 Satellite DGPS mode

In this manual, references to Satellite DGPS apply only to the AgGPS

332 receiver. When the receiver is in Beacon DGPS mode, a B, Beacon

Searching, Beacon Tracking, or Beacon FFT message appears in the

lower-left corner of the screen. To change between modes, press 4

and hold for five seconds. To display satellite differential information,

press 4 until an S appears in the lower left corner of the screen.

Satellite Frequency field

Srch í00 DOP00

S 1556.0000 Srch

GPS status indicators

Satellite DGPS indicators

4 Getting Started

40 AgGPS 332 GPS Receiver User Guide

41.2 Satellite and SBAS DGPS mode

The AgGPS 332 receiver can receive L1/L2, LBand, Beacon, and RTK

signals. The Home screen indicates which mode the receiver is in for

differential correction.

Figure 4.7 explains the GPS status indicators that can appear on the

first line of the Home screen display.

Figure 4.7 GPS status

Table 4.1 explains the indicators that can appear in the Position Type

field.

Table 4.1 Position types

Display Description

SRCH Searching for satellites

TRCK Tracking satellites

G/2D Outputting 2-dimensional autonomous positions

G/3D Outputting 3-dimensional autonomous positions

D/2D Outputting 2-dimensional differential positions

D/3D Outputting 3-dimensional differential positions

x/3D Outputting unconverged OmniSTAR XP differential positions

X/3D Outputting converged OmniSTAR XP differential positions

D/3D í07 DOP03

Current PDOP value

Number of GPS satellites (SVs) being tracked

Position Type

AgGPS 332 GPS Receiver User Guide 41

Getting Started 4

Note – The “/” symbol in the position type spins when the receiver is

operating correctly.

Satellite DGPS mode status indicators

When the receiver is in Satellite mode, the second line of the Home

screen displays the status indicators shown in Figure 4.8.

Figure 4.8 Satellite DGPS mode status indicators

Table 4.2 shows the possible satellite differential mode indicators.

h/3D Outputting unconverged OmniSTAR HP differential positions

H/3D Outputting converged OmniSTAR HP differential positions

r/3D Outputting float RTK positions

R/3D Outputting fixed RTK positions

Table 4.2 Satellite differential mode status indicators

Indicator Description

S ####.### S/N ## Operating in Satellite Differential mode.

Table 4.1 Position types (continued)

Display Description

S 1556.2550 ÷ø10

Frequency for tracked DGPS satellite.

Available frequencies vary according to your

location and DGPS service provider.

Signal-to-noise ratio of

DGPS signal, see Table 4.3.

Receiver is using Satellite DGPS corrections.

4 Getting Started

42 AgGPS 332 GPS Receiver User Guide

Table 4.3 explains the signal-to-noise ratio values for both Satellite and

WAAS/EGNOS DGPS modes.

SBAS DGPS mode status indicators

When the receiver is in SBAS DGPS mode, the second line of the Home

screen displays the status indicators shown in Figure 4.9.

Figure 4.9 SBAS DGPS mode status indicators

S SRCH ###.## Searching for Satellite Differential signal.

S TRCK ####.## Tracking satellite without acquiring signal lock.

Table 4.3 Signal-to-noise values

Value Description

Below 4 Unusable

4–8 Fair

>8 Excellent

Table 4.2 Satellite differential mode status indicators

Indicator Description

WAAS 122 ÷ø07

Signal-to-noise ratio of DGPS signal,

see Table 4.3

WAAS satellite ID

Receiver is using WAAS/EGNOS corrections

AgGPS 332 GPS Receiver User Guide 43

Getting Started 4

41.3 Beacon DGPS mode

When in Beacon DGPS mode, the Home screen displays “B” (Beacon

DGPS) in the lower left corner. Figure 4.10 explains the status

indicators that appear on the first line of the Home screen display when

the receiver is in this mode.

Figure 4.10 Beacon DGPS status

Table 4.4 describes messages that can appear when the receiver is in

Beacon DGPS mode.

Table 4.4 Beacon DGPS operating mode messages

Message Description

B The receiver is operating in Beacon mode.

Beacon Searching The receiver is searching for beacon signals.

Beacon Tracking The receiver is tracking beacon signals and is attempting

to gain lock.

Beacon Idle Beacon DGPS is not active.

Beacon FFT The receiver is looking for a beacon across the signal

spectrum.

Beacon Disabled Beacon DGPS is disabled in the receiver. You will need to

change configuration settings to enable Beacon DGPS.

External RTCM Differential corrections are being provided by an external

source, through port A or port B.

B H – R 310.0 ÷ ø15

The beacon signal-to-noise

ratio. S/N values range from

0 to 30. High numbers are

best. Above 6 is acceptable.

The beacon frequency. Frequency varies

depending on the beacon used.

Indicates the receiver is using Beacon DGPS.

The beacon operating mode.

4 Getting Started

44 AgGPS 332 GPS Receiver User Guide

4.2 Updating the Firmware

To ensure that the receiver and office computer connect, when you are

ready to update the firmware, do one of the following:

•If you use a Windows CE or pocket PC device with the computer,

make sure that Microsoft ActiveSync® technology is disabled

from using the COM port on the computer.

•If you use a Palm Pilot with the computer, make sure that the

Palm Synchronization program is disabled from using the COM

port on the computer.

To update the receiver firmware when a new version is released:

1. Download the upgrade files.

2. Install the FlashLoader200 utility.

3. Connect the receiver to an office computer.

4. Upgrade the firmware from the office computer, using the

upgrade files.

For full details of how to do this, refer to the Release Notes provided

with your receiver firmware.

If you have problems when you update the firmware, see Chapter 6,

Troubleshooting. For further assistance, contact your local Trimble

reseller.

CHAPTER

5

AgGPS 332 GPS Receiver User Guide 45

Configuring the Receiver 5

In this chapter:

QIntroduction

QHome Screen

QConfiguring Differential GPS

QConfiguring the AgGPS Receiver to Operate in Beacon Mode

QConfiguring the AgGPS Receiver to Operate in RTK Mode

QConfiguring the Communication Ports

QDisplay Options

QInstalling Passcodes

5 Configuring the Receiver

46 AgGPS 332 GPS Receiver User Guide

5.1 Introduction

Use the LCD screen to change configuration settings in the AgGPS 332

receiver. You will need to configure the receiver if you connect to

another device, for example.

•If a Trimble AgGPS Autopilot system is configured to use an

AgGPS receiver, and the port on the receiver is set to 8-N-1,

38.4 K, the Autopilot system automatically configures the

receiver.

•The EZ-Guide Plus and EZ-Steer systems require that NMEA is

set to 8-N-1, 38.4K.

Note – OmniSTAR VBS, XP, and HP are subscriber services that need to be

activated. For more information, see OmniSTAR, page 47.

5.2 Home Screen

Figure 5.1 shows the AgGPS 332 Home screen when WAAS corrections

are being received.

Figure 5.1 AgGPS 332 Home screen

D/3D í07 DOP03

WAAS 122 ÷ø04

Correction type

DGPS satellite name or ID

Signal-to-noise ratio

of DGPS satellite

Current PDOP value

Position type

Number of GPS satellites being tracked

GPS indicators

Correction

indicators

AgGPS 332 GPS Receiver User Guide 47

Configuring the Receiver 5

5.3 Configuring Differential GPS

For the receiver to output GPS position coordinates of submeter

accuracy, you must first select a differential signal from one of the

following sources:

•SBAS (WAAS/EGNOS) – free service, limited availability

The Wide Area Augmentation System (WAAS) augments GPS

with additional signals for increasing the reliability, integrity,

accuracy, and availability of GPS in the United States. The

European Geostationary Navigation Overlay System (EGNOS) is

the European equivalent of WAAS.

•OmniSTAR – paid subscription, available worldwide

You can use this paid service as an alternative to WAAS/EGNOS.

It provides over-the-air DGPS activation.

For more information, see Differential GPS positioning (DGPS),

page 10.

53.1 OmniSTAR

The AgGPS 332 receiver can use OmniSTAR corrections. To do this, you

need to configure the receiver and purchase an OmniSTAR

subscription.

Note – To track the OmniSTAR satellite, the receiver must be outside with

a clear view of the sky, turned on, and configured to receive OmniSTAR

VBS or HP corrections.

To activate an OmniSTAR subscription:

1. From the Home screen, select Configuration / DGPS Config.

2. Set the Source Select field to one of the following:

–Omnistar HP

–Omnistar VBS

–Omnistar XP

5 Configuring the Receiver

48 AgGPS 332 GPS Receiver User Guide

3. Set the EZ Sat: Omni* field to the area you are operating in. For

example, if you are working in California, select N. America West.

4. Press 4 then 5 to complete the procedure.

5. Obtain an OmniSTAR licence from OmniSTAR. All licenses are

activated over the air. Contact OmniSTAR on 1-888-883-8476

(USA or Canada) and provide the following details:

– your billing information

– serial number

– satellite beam name

OmniSTAR will activate the receiver. Activation can take 5 to

30 minutes.

50.1 WAAS/EGNOS

WAAS is a free satellite-based DGPS service that is available only in

North America; EGNOS is a free satellite-based DGPS service that is

available only in Europe.

To use the WAAS/EGNOS DGPS signal, you must first configure the

receiver.

1. From the Home screen, select Configuration / DGPS Config.

2. Set the Source Select field to WAAS.

3. Press 4 then 5 to complete the procedure.

AgGPS 332 GPS Receiver User Guide 49

Configuring the Receiver 5

To enable WAAS reception in the field:

1. Take the receiver outside. Make sure that it has a clear southeast

and southwest view of the sky.

2. Turn on the receiver. WAAS activation can take two or more

minutes. Once activation succeeds, the Home screen displays

D/3D:

5.1 Configuring the AgGPS Receiver to Operate in

Beacon Mode

To configure the receiver in Beacon mode:

1. From the Home screen, select Configuration / DGPS Config.

2. Set the Source Select field to Beacon.

3. Press 4 then 5 to complete this part of the procedure.

5 Configuring the Receiver

50 AgGPS 332 GPS Receiver User Guide

5.1 Configuring the AgGPS Receiver to Operate in

RTK Mode

To configure the receiver in RTK mode:

1. From the Home screen, select Configuration / DGPS Config.

2. Set the Source Select field to RTK.

3. Press 4 then 5 to complete this part of the procedure.

4. For RTK operation, connect the radio to a port. Change the port

input settings for that port to RtkLnk.

5.1 Configuring the Communication Ports

If the receiver is to be connected to an external device, configure

Ports A and B so that the proper data type is input to and output from

the receiver.

To configure Port A:

1. From the Home screen, select Configuration / Port A Config.

2. Use the menu commands to configure the communication

ports. Ensure that the receiver outputs the correct GPS position

data type for the hardware device or software program that is

connected to the receiver.

To configure Port B:

•Repeat the above steps but in Step 1 select Configuration / Port B

Config.

To configure Port C:

•Repeat the above steps but in Step 1 select Configuration / Port C

Config.

AgGPS 332 GPS Receiver User Guide 51

Configuring the Receiver 5

50.1 Configuring input/output communication

The port input and output settings appear in the first screen. In

Figure 5.2, the port is set to accept TSIP inputs at a baud rate of 115,000

with a parity of 8-Odd-1. The outputs are TSIP, also at a baud rate of

115,000.

Figure 5.2 Communication settings

To communicate with the AgGPS Autopilot, EZ-Guide Plus, or EZ-Steer

systems, or with external hardware devices and software programs,

configure the port input/output settings. Table 5.1 describes the input

settings.

Table 5.1 Port input settings

Setting Description

None Inputs nothing to the receiver.

TEXTB The receiver can accept ASCII data from an external device, such as

a chlorophyll meter, on Port A, merge it with NMEA GPS data, and

output the combined data on Port B. The incoming data must be

limited to 66 ASCII characters and terminated by a carriage return

and line feed (hex characters 0x0D 0x0A). The NMEA string

outputs as $PTNLAG001,<up to 66 ASCII characters>*<2 digit

checksum><CR><LF>. For the receiver to output the combined

NMEA string, NMEA must be selected as the output protocol on

Port B.

TEXTA See the description for the TEXTB setting (above). TEXTA input

outputs text on Port A. The default port settings are 8-N-1 TSIP

38.4 K. These may vary by product.

5 Configuring the Receiver

52 AgGPS 332 GPS Receiver User Guide

The default port settings are:

Note – If the receiver is to work with an Autopilot system, ensure that the

receiver port communication settings are 8-N-1 TSIP 38.4 K. To work with

some other devices and software programs, the receiver port

communication settings must be 8-N-1 NMEA 4800.

When using a Trimble SiteNet 900 radio, make sure that the

communication settings are correct in the receiver. The default settings

to use with the SiteNet radio are:

RTCM The receiver can accept RTCM data from an external DGPS device,

such as an external radio.

TSIP The receiver can accept or output TSIP data packets from the port

when using the AgGPS 170 Field Computer.

RtkLnk The receiver can accept real-time corrections (CMR data) from an

external device such as a Trimble radio.

Port A Port B

Baud rate In TSIP 38,400 TSIP 38,400

Out TSIP 38,400 TSIP 38,400

Data bits 8 8

Parity None None

Stop bits 1 1

Setting Description

Baud rate 38,400

Data bits 8

Parity None

Stop bits 1

Table 5.1 Port input settings (continued)

Setting Description

AgGPS 332 GPS Receiver User Guide 53

Configuring the Receiver 5

Changing the input or output port settings

1. From the Port A Config screen, press 2 until the Port-A

Input/Output screen appears.

2. Press 3 to activate the cursor.

3. Press 1 or 2 to change the value.

4. Press 3.

5. Repeat Step 3 through Step 4 until you have set all the required

values.

6. Press 4 to save all the changes.

7. Press 2 to move to the next screen.

NMEA settings

Three screens (NMEA1, NMEA2, and NMEA3) show what NMEA

messages are output from the port. Message types shown in upper case

are being output; message types shown in lower case are not.

For more information about NMEA message types, refer to the

document called NMEA-0183 Messages Guide for AgGPS Receivers on

the Trimble website (www.trimble.com).

Port output rate

This setting can be used to vary the NMEA and TSIP output rate. A

setting of 1 outputs one position each second.

ASAP equals the rate selected on the Position Rate screen under the

GPS Config menu. A setting of ASAP outputs positions five or ten times

every second. The default ( factory) setting is 1 Hz.

To change the receiver configuration settings, enter the Port Config

screens under the configuration menus.

5 Configuring the Receiver

54 AgGPS 332 GPS Receiver User Guide

5.1 Display Options

Use the Display Options menu to control how information is displayed

in the screens that you can access from the Status and Configuration

menus.

To view the Display Options menu:

•From the Home screen, press 2:

Setting the language

To change the language displayed:

1. Navigate to the Language screen:

2. Press 3 to select the Language field.

3. Press 1 or 2 until the required language is displayed.

4. Press 4 to select it and save the changes.

5. Press 5 to return to the Display Options menu.

The screen automatically displays the selected language.

Setting the units

The Units screen displays U.S., Metric, or Nautical units in the screens

that you access from the Field Operation, Status, and Configuration

menus.

Note – This setting does not affect GPS position data output.

AgGPS 332 GPS Receiver User Guide 55

Configuring the Receiver 5

1. Navigate to the Units screen:

2. Press 3 to select the Units field.

3. Press 1 or 2 until the required unit is displayed.

4. Press 4 to select it and save the changes.

5. Press 5 to return to the Display Options menu.

6. Press 5 again to return to the Home screen.

Locking the Configuration menus

To prevent unauthorized changes to the configuration, you can lock the

Configuration menus:

1. Navigate to the Lock Display Cfg screen.

2. Press 4 to display the Enter Password screen. The cursor is

active on the first digit:

3. Use the last five numbers of the receiver serial number as the

password (“passcode”).

4. Press 1 or 2 until the first digit of the serial number appears.

5. Press 3 to select the next digit. Repeat step 3 until all five digits

are entered.

6. Press 4 to save the changes.

7. The Valid Password message appears, and the Configuration

menus are no longer displayed when you navigate the menus.

If the message Invalid Password appears, enter the password

again.

5 Configuring the Receiver

56 AgGPS 332 GPS Receiver User Guide

BTip – When the Configuration menus are locked, you can view most

Configuration menu settings from the Status menus.

To unlock the Configuration menus, repeat the above procedure.

Clearing battery-backed RAM

CWARNING – When you select the Clear BB Ram option, any changes that

you have made in the Configuration menus are deleted and cannot be

restored.

Use the Clear BB RAM screen to remove all configuration settings in the

receiver memory (RAM) and return the receiver to its factory default

configuration settings:

To delete battery-backed memory:

1. Navigate to the Clear BB RAM screen:

2. Press 3 to activate the cursor.

3. Press 1 or 2 to select Yes.

5.1 Installing Passcodes

When you purchase an option with your receiver, your Trimble Reseller

provides the necessary password. Once entered, the password is stored

in permanent memory and remains even when the receiver is switched

off.

Use the Update receiver screen of the AgGPS menu system to enter the

password directly into the receiver and activate the option for

immediate field use.

1. Navigate to the Update receiver screen. Press 4.

The active cursor highlights the first digit.

2. Press 1 or 2 to enter the first number of the password.

AgGPS 332 GPS Receiver User Guide 57

Configuring the Receiver 5

3. Press 3 to move to the next digit.

4. Repeat Step 2 through Step 3 until all numbers are entered.

5. Press 4 to save changes.

The screen displays the selected option as enabled.

If an error message appears, enter the password again. If you are still

unsuccessful, contact your local Trimble Reseller for assistance.

50.1 FlashLoader200 utility

If you have not yet done so, install the latest version of FlashLoader200

utility on the office computer. See page 44. Use FlashLoader200 to enter

one or more passwords:

1. On the office computer, click , then select Programs /

Flashloader200.

2. In the dialog that appears, select the Update receiver with

password check box. Click Proceed.

3. The Flash Progress dialog appears while the utility attempts to

find the receiver. When the receiver is found, the Enter

Passwords dialog appears.

If the receiver cannot be found, check that the cables are

properly connected and try again.

4. In the Enter Passwords dialog, enter the 10-digit password into

the first blank line. If you have more than one option, enter each

password on a separate line. Click OK.

The process takes a few seconds and a message appears when

completed.

5. In the dialog that appears, click Yes to continue.

6. When the successful operation message appears, click OK.

The option is successfully installed.

5 Configuring the Receiver

58 AgGPS 332 GPS Receiver User Guide

If any password operation fails, the FlashLoader200 utility displays a

message that identifies the failed option. Disconnect the receiver, then

reconnect it and try again. If you are still unsuccessful, contact your

local Trimble Reseller for assistance.

CHAPTER

6

AgGPS 332 GPS Receiver User Guide 59

Troubleshooting 6

In this chapter:

QIntroduction

QProblems with GPS

QInterference Problems

QProblems with the GPS Receiver

QProblems with the FlashLoader200 Utility

6 Troubleshooting

60 AgGPS 332 GPS Receiver User Guide

6.1 Introduction

This chapter describes some problems that can arise and explains how

to solve them. It includes a series of flowcharts to help with

troubleshooting.

As you work through this chapter, you may need to view the receiver

status or change values in some fields. For information on how to do

this, refer to the document called NMEA-0183 Messages Guide for

AgGPS Receivers. This document is on the Trimble website

(www.trimble.com).

6.2 Problems with GPS

Problem Possible solution

Poor accuracy

The accuracy of GPS positions is poor because

the receiver is picking up poor quality signals

from the satellites.

The receiver always calculates the most

accurate position it can, given the current GPS

satellite differential operating conditions.

Change some or all of the following GPS

settings:

•Minimum elevation – Increase the setting

(the default is 8°).

•Minimum Signal Strength – Increase the

System Mask AMU setting (the default is 3).

•Maximum PDOP – Decrease the setting

(the default is 13).

•GPS Mode – Change to Manual 3D

(the default is Auto 2D/3D).

•DGPS Mode – Change to DGPS

(the default is DGPS Auto/On/Off).

GPS signals are reflecting off nearby trees

and/or metal buildings and horizontal

surfaces.

To reduce multipath noise, mount the GPS

receiver so that it has a clear view of the sky.

The receiver must be away from trees and

large metal objects.

Intermittent loss of lock on satellite

The receiver loses the satellite signal from

time to time.

Make sure that the receiver is mounted on the

highest point of the vehicle and is clear of

metal surfaces.

Check Maximum PDOP and Minimum Signal

Strength settings (see Poor accuracy, above).

AgGPS 332 GPS Receiver User Guide 61

Troubleshooting 6

Intermittent DGPS signal

The correction signal strength can drop to

unusable levels. Causes include tree canopy

cover between the receiver and the

differential satellite, radar sets, and

microwave transmitters.

Move the receiver away from the tree cover

and/or from sources of electromagnetic

interference.

Tracking but not receiving a differential signal

The receiver is tracking satellites and tracking

an OmniSTAR satellite beam, but is not

receiving DGPS signals. The Home screen

indicates how many satellites are being

tracked, and whether a differential source is

being tracked.

You see:

h-3D for HP not converged

H-3D for HP converged

r-3D for RTK float

R-3D for RTK fixed

D-3D for DGPS

HP and RTK also give an indication of

positional accuracy on the Home screen.

Check that your DGPS service subscription is

still current and enabled.

For OmniSTAR service:

1. Use the AgRemote utility to navigate to

one of the following screens, depending on

what you are using:

•the Omni HP Info screen

•the Omni VBS Info screen.

2. Press 4 until Stop Date appears.

If the message Access Unknown appears,

contact OmniSTAR to reactivate your

subscription. For more information, see

OmniSTAR, page 47.

The receiver must be switched on and

configured to track the correct satellite

coverage beam before it can be reactivated.

The receiver automatically tracks the correct

beam based on receiver geographic location.

If the receiver is manually changed, automatic

tracking is deactivated until you perform a

hard reset or firmware flash.

When a satellite subscription is activated, the

Home screen displays D/3D.

Long time to initialize

In RTK mode, longer baselines require longer

initialization times. (The baseline is the

distance between the base receiver and the

rover receivers.)

Wait for the receiver to initialize or consider

repositioning the base receiver to shorten the

baseline. Make sure the rover is in a clear area.

Problem Possible solution

6 Troubleshooting

62 AgGPS 332 GPS Receiver User Guide

6.1 Interference Problems

Loss of initialization

In RTK mode initialization can be lost when

the rover receiver is close to trees or buildings

and the number of satellites falls below four.

Additionally, initialization may be lost if the

receiver has not been tracking RTK corrections

for some time. For more information, see the

next item.

Move away from trees and obstructions to

initialize. Once initialized, approach the

obstructed area again. If the obstructions are

severe, GPS positioning may not work in that

area.

Because the GPS satellites move, there may be

times of the day when you are working in an

area with obstructions. For more information,

see the Trimble Planning software on the

Trimble website (www.trimble.com).

Not tracking RTK corrections

The radio link is down or intermittent. •Ensure that the line-of-sight between the

base and rover receivers is not obstructed.

•Ensure that the rover receiver is within

range of the radio.

•Ensure that the radio power supply is on.

Problem Possible solution

Strong magnetic fields

Strong magnetic fields have no effect on GPS

or satellite DGPS signals.

However, some computers and other electric

equipment radiate electromagnetic energy

that can interfere with a GPS receiver.

If you suspect interference from a local

magnetic field, move the receiver away from,

or turn off, the suspect electronics while

observing the number of satellites being

tracked on the receiver or the signal-to-noise

ratio (SNR) of the satellite. If the SNR goes up

when the electronics are turned off, there may

be interference from the local electronics.

FM 2-way radios

Transmitting FM 2-way radios can interfere

with OmniSTAR, WAAS, and GPS signal

reception.

Make sure that there is at least 1 m (3 ft)

between the FM 2-way radio antenna and the

receiver.

Problem Possible solution

AgGPS 332 GPS Receiver User Guide 63

Troubleshooting 6

6.2 Problems with the GPS Receiver

Engine noise

An unshielded ignition system can cause

enough noise to block reception of a

differential signal.

Use resistor spark plug wires on the vehicle

ignition system.

An alternator can cause noise that interferes

with a differential signal.

•Use bypass capacitors, commonly available

in automotive stores for cleaning up

interference to CB and other radios. If the

problem persists, shield engine components

with aluminum foil.

•Relocate the antenna on the machine.

•Determine the optimal antenna location by

watching the SNR value on the Home

screen.

Note – Before replacing engine parts in an

attempt to solve this problem, make sure that

the problem is not caused by a computer or

power source near the receiver. Some

computers and their power sources cause

noise that disrupts GPS and satellite DGPS

signals.

Problem Possible solution

Mounting location

The receiver is not picking up a clear signal. Mount the receiver on the centerline of the

vehicle, away from any sources of interference

and with a clear view of the sky (see Choosing

a location, page 21).

Problem Possible solution

6 Troubleshooting

64 AgGPS 332 GPS Receiver User Guide

Cables

One of the cables seems faulty. Use an ohmmeter to check the cable. The

resistance of a good cable between connector

pins at each end of the cable is zero.

If the cable is sound, but the problem persists,

try exchanging the cable with one that you

know is working.

If the cable is defective, contact your local

Trimble Reseller for an RMA number (if the

Trimble product is still under warranty), or to

purchase a replacement cable.

Real-time clock battery

A lithium-ion battery in the receiver powers

the internal real-time clock and so enables the

receiver to get a first fix faster. The battery has

a life of 7.5 years. When the battery fails, the

internal clock cannot keep accurate time and

the receiver may take longer to output GPS

positions.

Please contact your local Trimble Reseller

to get the batteries replaced. You cannot

replace the battery yourself.

Factory defaults

You need to restore the receiver factory

defaults.

To restore receiver factory default settings:

1. Connect the receiver to a computer. Turn

on the receiver.

2. Run the AgRemote utility.

3. Navigate to the Clear BB RAM screen.

4. Press 2 until Yes appears.

5. Press 4.

The factory default settings are restored. The

DGPS service subscription is not lost.

Problem Possible solution

AgGPS 332 GPS Receiver User Guide 65

Troubleshooting 6

6.1 Problems with the FlashLoader200 Utility

Problem Possible solution

The FlashLoader 200 utility cannot detect the

receiver or download the firmware.

Make sure that:

•Other programs, such as Microsoft

ActiveSync technology, are not using the

COM port that the computer is using.

•The receiver is connected to a 12–32 V DC

power source.

•All cables are connected correctly between

the device and the computer.

•The receiver is connected to the correct

computer COM port. To do this:

1. From the FlashLoader200 menu, select

Settings.

2. Select the check box for a serial link.

3. At Port, select Auto. Click OK.

4. Select the Upload firmware to receiver

check box.

5. Navigate to where the firmware file is

saved and select the file. Click Proceed.

6. From the Auto Port Select dialog, select

Use receiver on port... and click OK.

Once you have checked this, turn off the

receiver then turn it on again. Try again to

connect the FlashLoader200 utility.

6 Troubleshooting

66 AgGPS 332 GPS Receiver User Guide

APPENDIX

A

AgGPS 332 GPS Receiver User Guide 67

Cables and Connectors A

In this appendix:

QIntroduction

QPort A and Port B Connectors

QStandard Power/Data Cable

A Cables and Connectors

68 AgGPS 332 GPS Receiver User Guide

A.1 Introduction

This appendix contains pin-out information for standard and optional

cables. Use the information to troubleshoot communication problems

with the receiver and devices not supported by the standard and

optional cables.

A.2 Port A and Port B Connectors

Table A.1 gives pin-out requirements for the Port A, Port B, and Port C

connectors.

Table A.1 AgGPS 332 receiver Port A, Port B, and Port C

Pin Port A connector Port B connector Port C connector

1 Event In Event In Event In

2 RS-232 B Out RS-232 A Out

3 RS-232 B In RS-232 A In

4 CAN Hi CAN Hi CAN Hi

5 Ground Ground Ground

6 RTS Out RTS Out RTS Out

7 Power On/Off Power On/Off Power On/Off

8 CTS In CTS In CTS In

9 CAN Low CAN Low CAN Low

10 Battery +V Battery +V Battery +V

11 Battery –V Battery –V Battery –V

12 1 PPS Output 1 PPS Output 1 PPS Output

AgGPS 332 GPS Receiver User Guide 69

Cables and Connectors A

A.3 Standard Power/Data Cable

Table A.2 gives pin-out information for the standard power/data cable

(P/N 30945).

Table A.2 Standard power/data cable

To re ce i ve r

P1 connector

12-pin (female)

7 cond

cable

To c o m p u t er

P2 connector

DE9 (female)

To DC p o w er

2 conductor

cable

Pin Signal Color Pin Signal Color Signal

1Event In ← Black 4 DTR

2TXD → Orange 2 RXD

3RXD ← Red 3 TXD

4

5 SIG GND ↔ Shield 5 SIG GND

6RTS → Yellow 8 RTS

8CTS ← Green 7 CTS

9

71

1Pins 7 and 10 of the P1 connector are jumpered with a 5 kOhm, 5% resistor.

PWR ON ←

101V+ IN ← Red Red V+ IN

11 V– IN ← Black Black V– OUT

12 PPS →Blue 9 PPS

A Cables and Connectors

70 AgGPS 332 GPS Receiver User Guide

APPENDIX

B

AgGPS 332 GPS Receiver User Guide 71

Specifications B

In this appendix:

QIntroduction

QAgGPS 332 Receiver Physical Characteristics

QGPS Channels Performance

QL-Band Satellite Differential Correction Receiver with OmniSTAR

Support

QReceiver Default Settings

QDGPS Antenna

QDual-Frequency Antenna

QBeacon Channels

B Specifications

72 AgGPS 332 GPS Receiver User Guide

B.1 Introduction

This appendix details specifications for the AgGPS 332 receiver and the

compatable Trimble antennas.

B.2 AgGPS 332 Receiver Physical Characteristics

B.3 GPS Channels Performance

Item Description

Size 14.78 cm wide x 5.58 cm high x 21.59 cm deep

(5.70 in x 2.20 in x 8.60 in)

Power Nominal 350 mA at 12 V DC

Operating temperature –30 °C (–22 °F) through +70 °C (+158 °F)

Storage temperature –40 °C (–40 °F) through +85 °C (+185 °F)

Humidity Complies with Mil 810E Method 507.3 Procedure III Aggravated

Cyclic Humidity.

Ten 24 hour cycles of constant 95% RH, with cycling temperature

and dwells +30 °C (+86 °F) and +60 °C (140 °F). Unit sealed to +/-

5PSID

Casing Low-profile UV-resistant plastic. Dust-proof, waterproof, shock

resistant, with recessed protected connectors.

Connectors 12-pin Deutsch connectors

Ports Two connection ports, both of which support RS-232 and CAN

Mounting Three holes for 10 mm (0.39 in) bolts

Compliance FCC Part 15 Class A, C-Tick, E-mark, CE-mark

Item Description

General 12-channel, parallel tracking L1 1571.42 MHz and L2

1227.60 MHz. C/A code and carrier phase filtered measurement.

Update rate 1, 5, 10 Hz

RTK speed accuracy 0.16 kph (0.10 mph)

AgGPS 332 GPS Receiver User Guide 73

Specifications B

RTK position accuracy Horizontal 2.5cm (0.98in) + 2ppm, 2sigma, and vertical

3.7 cm (1.46 in) + 2 ppm, 2 sigma, if all of the following

criteria are met:

•At least 5 satellites

•PDOP <4

•CMR corrections

•Standard format broadcast from a Trimble MS750, AgGPS

214, or equivalent reference station

Differential speed accuracy 0.16 kph (0.1 mph)

Differential position accuracy Less than 1 m (3.28 ft) horizontal if all of the following criteria

are met:

•At least 5 satellites

•PDOP <4

•RTCM SC-104 corrections

•Standard format broadcast from a Trimble MS750, AgGPS

214, or equivalent reference station

OmniSTAR HP speed accuracy 0.16 kph (0.1 mph)

OmniSTAR HP position

accuracy

10 cm (3.94 in) after convergence, 2 sigma, if all the

following criteria are met:

•At least 5 satellites

•PDOP <4

•OmniSTAR HP corrections

Convergence time can vary, depending on the environment.

Time to the first fix (submeter accuracy) is typically <30 seconds;

time to the first useable fix (<10 cm accuracy) is typically

<30 minutes.

OmniSTAR XP position

accuracy

20 cm (7.87 in) after convergence, 2 sigma, if all the

following criteria are met:

•At least 5 satellites

•PDOP <4

•OmniSTAR XP corrections

Convergence time can vary, depending on the environment.

Time to the first fix (submeter accuracy) is typically <30 seconds;

time to the first useable fix (<10 cm accuracy) is typically

<30 minutes

Time to first fix <30 seconds, typical

Multipath mitigation EVEREST technology

Item Description

B Specifications

74 AgGPS 332 GPS Receiver User Guide

B.4 L-Band Satellite Differential Correction

Receiver with OmniSTAR Support

B.5 Receiver Default Settings

Satellite differential

compatibility

OmniSTAR, WAAS, and EGNOS

NMEA messages GGA 1 11, GLL, GSA1, GST, GSV, GST, MSS, PTNLDG, PTNL PJK,

PTNL PJT, PTNL VGK, PTNL VHD, PTNLEV, PTNLID, PTNLSM, RMC1,

VGK, VTG1, XTE, ZDA

1 By default, the receiver is configured to output GCA, GSA, RMC, and VTG messages at a 1 Hz

(1 position per second) update rate.

Item Description

Bit error rate 10-5 for Eb/N of >5.5 dB

Acquisition and reacquisition time <5 seconds, typical

Frequency band 1525–1559 MHz

Channel spacing 0.5 kHz

Item Description

DGPS source WAAS/EGNOS

Dynamics Land

Minimum elevation 8°

AMU mask 3

PDOP mask 13

PDOP 2D/3D switch 11

DGPS mode Auto On/Off

DGPS correction age limit 250 seconds

Pos fix rate 1 Hz

Item Description

AgGPS 332 GPS Receiver User Guide 75

Specifications B

B.6 DGPS Antenna

B.7 Dual-Frequency Antenna

B.8 Beacon Channels

Item Description

Size 15.5 cm D x 14.0 cm H (6.1 in x 5.5 in)

Weight 0.55 Kg (1.2 lb)

Operating temperature –30°C to +65°C

Storage temperature –40°C to +80°C

Humidity 100% condensing, unit fully sealed

Casing Dust-proof, waterproof, shock resistant

Item Description

Size 16 cm D x 7.5 cm H x (6.25 in x 3 in H)

Weight 0.55 Kg (1.2 lb)

Operating temperature –30°C to +65°C

Storage temperature –40°C to +80°C

Humidity 100% condensing, unit fully sealed

Casing Dust-proof, waterproof, shock resistant

Item Description

Frequency range 283.5 kHz to 325.0 kHz

Channel Spacing 500 Hz

Beacon modulation 50, 100, and 200 bits/second

Signal strength 10 mV/meter minimum

Dynamic range 100 dB

Channel selectivity 70 dB @ > 500 Hz offset

Frequency offset 17 ppm maximum

3rd order intercept +15 dBm @ RF input (min. AGC setting)

Beacon acquisition time <5 seconds, typical

Operating modes Auto Power, Auto Range, and Manual

B Specifications

76 AgGPS 332 GPS Receiver User Guide

APPENDIX

C

AgGPS 332 GPS Receiver User Guide 77

NMEA-0183 Messages C

In this appendix:

QIntroduction

QNMEA-0183 Message Structure

QNMEA Message Summary

QGGA (GPS Fix Data)

QGLL (Position Data)

QGRS (GPS Range Residuals)

QGSA (GPS DOP and Active Satellites)

QGST (GPS PRN)

QGSV (GPS Satellites in View)

QMSS (Beacon Receiver Signal Status)

QRMC (Recommended Minimum Specific GPS Data)

QVTG (Course Over Ground and Ground Speed)

QXTE (Cross-Track Error)

QZDA (Time and Date)

QPTNLEV Proprietary (Event Marker)

QPTNLID Proprietary (Trimble Receiver ID)

QPTNLDG Proprietary (Trimble DGPS Receiver Status)

QPTNL,GGK (Time, Position, Position Type, and DOP)

QPTNLSM Proprietary (RTCM Special)

C NMEA-0183 Messages

78 AgGPS 332 GPS Receiver User Guide

C.1 Introduction

Trimble AgGPS receivers output NMEA (National Marine Electronic

Association) messages for GPS position data transfer between

electronics equipment. Information on the NMEA-0183

communication standard for GPS receivers is available at

www.nmea.org.

This appendix describes NMEA-0183 standard messages that are

configured using TSIP command packets.

Other messages are supported only when specific Trimble options are

installed on the receiver. Messages beginning with PTNL are Trimble

proprietary messages.

C.2 NMEA-0183 Message Structure

NMEA-0183 messages are strings of comma-delimited text. Figure C.1

shows the structure of an NMEA-0183 message.

Figure C.1 Example showing NMEA-0183 message structure — ZDA

$GPZDA,

220320.0, 26, 06, 2004, -5, 15 *52

Checksum

Sentence ID

Field 1

Field 2

Field 3

Field 4

Field 5

Comma Delimiter

Field 6

Asterisk Delimiter

AgGPS 332 GPS Receiver User Guide 79

NMEA-0183 Messages C

Each NMEA message includes:

•an identifier to distinguish it from other messages in the data

stream

•one or more fields of data, separated by a comma

•a checksum (preceded by *) to validate the data

Table C.1 explains the fields in the ZDA example shown in Figure C.1.

Fields 5 and 6 together give the total offset. Local time is 5 hours and

15 minutes earlier than GMT.

C2.1 Symbols and delimiters

All messages follow the NMEA-0183 Version 2.1 format, in which

symbols and delimiters identify or separate the message data.

NMEA-0183 messages always:

•begin with a dollar sign ($) followed by a talker ID code ( for

example GP) and a message ID code ( for example, ZDA)

•end with a carriage return and line feed

Table C.1 Fields in an NMEA-0183 message — ZDA

Field Data Description

1 220320.0 Time in UTC

2 26 Day (01 to 31)

3 06 Month (01 to 12)

41997 Year

5 -5 Local time zone offset from GMT

(in hours 00 to ±13 hours)

6 15 Local time zone offset from GMT (in minutes)

C NMEA-0183 Messages

80 AgGPS 332 GPS Receiver User Guide

C2.2 Checksum values

Newer Trimble receivers conform to the NMEA-0183 Version 2.1 format,

in which checksums are mandatory for all messages.

The checksum is calculated from all characters in the message,

including commas but excluding the “$” and “*” delimiters. The

hexadecimal result is converted to two ASCII characters (0–9, A–F), of

which the most significant appears first.

C2.3 Field formats

The data values output by Trimble AgGPS receivers meet the

NMEA-0183 Version 2.1 standard.

C2.4 Null fields

If a message contains a fixed number of fields, null (empty) fields are

included if no data is available. These fields are usually reserved for

data that is transmitted on a periodic or irregular basis.

C2.5 Talker ID codes

Talker ID code identifies the source of the data ( for example, GPS,

Loran C, or Sounder). Table C.2 describes the Talker ID codes that are

available for NMEA-0183 output from most Trimble receivers.

Table C.2 Supported Talker ID codes

Code Description

GP GPS

LG Loran C/ GPS

LC Loran C

II Integrated Instrumentation

AgGPS 332 GPS Receiver User Guide 81

NMEA-0183 Messages C

C2.6 Latitude and longitude values

The latitude and longitude values in NMEA-0183 messages are

presented in degrees, minutes, and decimal minutes, in a single field:

•latitude (ddmm.mmmm)

•longitude (dddmm.mmmm)

Latitude and longitude direction values are sent in a separate field as N,

S, E, or W.

C2.7 Time values

Time values in Universal Time Coordinated (UTC) are presented in

hhmmss.ss format, where hh is hours (00–23), mm is minutes, and ss.ss

is seconds and fractions of seconds.

C2.8 Reading NMEA string format

Be aware that NMEA strings can be of varying length, depending on

how the receiver is configured. Comma delimited parsing is

recommended.

C NMEA-0183 Messages

82 AgGPS 332 GPS Receiver User Guide

C.3 NMEA Message Summary

Table C.3 describes the NMEA-0183 message set that is supported by

the AgGPS receivers.

Note – Some messages are only supported when specific Trimble options

are installed on the receiver.

Messages beginning with PTNL are Trimble proprietary messages.

Table C.3 NMEA message summary

Message Message Contents

GGA (GPS Fix Data) Time, position, and fix related data

GLL (Position Data) Position fix, time of position fix, and status

GRS (GPS Range

Residuals)

GPS range residuals

GSA (GPS DOP and Active

Satellites)

GPS position fix mode, SVs used for navigation and DOP values

GST (GPS PRN) GPS Pseudorange Noise (PRN) statistics

GSV (GPS Satellites in

View)

Number of SVs visible, PRN numbers, elevation, azimuth and SNR

values

MSS (Beacon Receiver

Signal Status)

Signal strength, signal-to-noise ratio, beacon frequency, and

beacon bit rate

RMC (Recommended

Minimum Specific GPS

Data)

UTC time, status, latitude, longitude, speed over ground (SOG),

date, and magnetic variation of the position fix

VTG (Course Over

Ground and Ground

Speed)

Actual track made good and speed over ground

XTE (Cross-Track Error) Cross-track error

ZDA (Time and Date) UTC time, day, month, and year, local zone number and local zone

minutes

PTNLDG Proprietary

(Trimble DGPS Receiver

Status)

Beacon channel strength, channel SNR, channel frequency, channel

bit rate, channel number, channel tracking status, RTCM source,

and channel performance indicator

PTNLEV Proprietary

(Event Marker)

Time, event number, and event line state for time-tagging change

of state on an event input line

AgGPS 332 GPS Receiver User Guide 83

NMEA-0183 Messages C

All messages in this appendix are presented in the format shown in

Table C.1. In each example, the structure is shown in the paragraph

before the table.

PTNL,GGK (Time,

Position, Position Type,

and DOP)

Time, Position, Position Type and DOP values

PTNLID Proprietary

(Trimble Receiver ID)

Receiver machine ID, product ID, major and minor release numbers,

and firmware release date

PTNLSM Proprietary

(RTCM Special)

Reference Station Number ID and the contents of the Special

Message included in valid RTCM Type 16 records

Table C.3 NMEA message summary (continued)

Message Message Contents

C NMEA-0183 Messages

84 AgGPS 332 GPS Receiver User Guide

C.4 GGA (GPS Fix Data)

The GGA message contains the time, position, and fix related data.

The GGA message structure is:

$GPGGA,151924,3723.454444,N,12202.269777,

W,2,09,1.9,–17.49,M,–25.67,M,1,0000*57

Table C.4 describes these fields.

Table C.4 GGA message fields

Field Description

1 UTC of position fix in HHMMSS.SS format

2 Latitude in DD MM,MMMM format (0-7 decimal places)

3 Direction of latitude

N: North

S: South

4 Longitude in DDD MM,MMMM format (0-7 decimal places)

5 Direction of longitude

E: East

W: West

6GPS Quality indicator

0: fix not valid

1: GPS fix

2: DGPS fix

7 Number of SVs in use, 00-12

8 HDOP

9 Antenna height, MSL reference

10 “M” indicates that the altitude is in meters

11 Geoidal separation

12 “M” indicates that the geoidal separation is in meters

13 Age of differential GPS data record, Type 1; Null when DGPS not used

14 Base station ID, 0000-1023

AgGPS 332 GPS Receiver User Guide 85

NMEA-0183 Messages C

C.5 GLL (Position Data)

The GLL message specifies the position fix, time of position fix, and

status.

The GLL message structure is:

$GPGLL,3723.4543,N,12202.2696,W,151933,

A*3E

Table C.5 describes these fields.

Table C.5 GLL message fields

Field Description

1 Latitude in dd mm,mmmm format (0-7 decimal places)

2 Direction of latitude

3 Longitude in ddd mm,mmmm format (0-7 decimal places)

4 Direction of longitude

5 UTC of position in hhmmss.ss format

6 Fixed text “A” shows that data is valid

C NMEA-0183 Messages

86 AgGPS 332 GPS Receiver User Guide

C.6 GRS (GPS Range Residuals)

The GRS message is used to support the Receiver Autonomous

Integrity Monitoring (RAIM).

The GRS message structure is:

$GPGRS,220320.0,0,-0.8,-0.2,-0.1,

-0.2,0.8,0.6,,,,,,,*55

Table C.6 describes these fields.

Note – Because the contents of this NMEA message do not change

significantly during a one-second interval, the receiver outputs this

message at a maximum rate of 1 Hz.

Table C.6 GRS message fields

Field Description

1 UTC time of GGA position fix

2Residuals

Residuals used to calculate position given in the matching

GGA line

1: Residuals recomputed after the GGA position was computed

3-14 Range residuals for satellites used in the navigation solution, in

meters

AgGPS 332 GPS Receiver User Guide 87

NMEA-0183 Messages C

C.7 GSA (GPS DOP and Active Satellites)

The GSA message identifies the GPS position fix mode, the SVs used for

navigation, and the Dilution of Precision values.

The GSA message structure is:

$GPGSA,A,3,19,28,14,18,27,22,31,29,,,,,

1.7,1.0,1.3*35

Table C.7 describes these fields.

Table C.7 GSA message fields

Field Description

1Mode

M: Manual, forced to operate in 2D or 3D

A: Automatic, 3D/2D

2Mode

1: Fix not available

2: 2D

3: 3D

3–14 IDs of SVs used in position fix (null for unused fields)

15 PDOP

16 HDOP

17 VDOP

C NMEA-0183 Messages

88 AgGPS 332 GPS Receiver User Guide

C.8 GST (GPS PRN)

The GST message is used to support Receiver Autonomous Integrity

Monitoring (RAIM).

The GST message structure is:

$GPGST,220320.0,1.3,0.8,0.5,166.1,0.8,0.5,1.6,*4F

Table C.8 describes these fields.

Note – Because the contents of this NMEA message do not change

significantly during a one-second interval, the receiver outputs this

message at a maximum rate of 1 Hz.

Table C.8 GST message fields

Field Description

1UTC time of GGA fix

2RMS value of the standard deviation of the range inputs to the

navigation process (range inputs include pseudoranges and DGPS

corrections)

3 Standard deviation of semi-major axis of error ellipse, in meters

4 Standard deviation of semi-minor axis of error ellipse, in meters

5 Orientation of semi-major axis of error ellipse, in degrees from true

north

6 Standard deviation of latitude error, in meters

7 Standard deviation of longitude error, in meters

8 Standard deviation of altitude error, in meters

AgGPS 332 GPS Receiver User Guide 89

NMEA-0183 Messages C

C.9 GSV (GPS Satellites in View)

The GSV message identifies the number of SVs in view, the PRN

numbers, elevation, azimuth and SNR values.

The GSV message structure is:

$GPGSV,4,1,13,02,02,213,,03,

-3,000,,11,00,121,,14,13,172,05*67

Table C.9 describes these fields.

Note – Because the contents of this NMEA message do not change

significantly during a one-second interval, the receiver outputs this

message at a maximum rate of 1 Hz.

Table C.9 GSV message fields

Field Description

1 Total number of messages of this type in this cycle

2 Message number

3 Total number of SVs visible

4 SV PRN number

5 Elevation in degrees, 900 maximum

6 Azimuth, degrees from true north, 0000 to 3590

7 SNR, 00-99 dB (null when not tracking)

8–11 Information about second SV, same format as fields 4–7

12–15 Information about third SV, same format as fields 4–7

16–19 Information about fourth SV, same format as fields 4–7

C NMEA-0183 Messages

90 AgGPS 332 GPS Receiver User Guide

C.10MSS (Beacon Receiver Signal Status)

The MSS message identifies the status of the beacon signal, including

the beacon signal strength, beacon signal-to-noise ratio (SNR), beacon

frequency, and beacon bit rate.

The MSS message structure is:

$GPMSS,52.5,23.7,287.0,100*4C

Table C.10 describes these fields.

Note – Because the contents of this NMEA message do not change

significantly during a one-second interval, the receiver outputs this

message at a maximum rate of 1 Hz.

Table C.10 MSS message fields

Field Description

1 Signal strength (SS), dB ref: 1 υV/m

2 Signal-to-Noise Ratio (SNR), dB

3 Beacon frequency, 283.5–325.0 kHz

4 Beacon bit rate (25, 50, 100, 200), bits per second

5 Channel number

AgGPS 332 GPS Receiver User Guide 91

NMEA-0183 Messages C

C.11RMC (Recommended Minimum Specific GPS

Data)

The RMC message identifies the UTC time, status, latitude, longitude,

speed over ground (SOG), date, and magnetic variation of the position

fix.

The RMC message structure is:

$GPRMC,184804.00,A,3723.476543,N,

12202.239745,W,000.0,0.0,051196,15.6,E*7C

Table C.11 describes these fields.

Table C.11 RMC message fields

Field Description

1 Time: UTC time of the position fix in hhmmss.ss format

2 Status

Valid

V: Navigation Receiver Warning (V is output whenever the

receiver suspects something is wrong)

3 Latitude coordinate (the number of decimal places, 0–7, is

programmable and determined by the numeric precision selected

in TSIP Talker for a RMC message)

4 Latitude direction

N = North, S = South

5 Longitude coordinate (the number of decimal places, 0–7, is

programmable and determined by the numeric precision selected

in TSIP Talker for a RMC message)

6 Longitude direction

W: West

E: East

7 Speed Over Ground (SOG) in knots (0–3 decimal places)

8 Track Made Good, True, in degrees

9 Date in dd/mm/yy format

10 Magnetic Variation in degrees

C NMEA-0183 Messages

92 AgGPS 332 GPS Receiver User Guide

11 Direction of magnetic variation

E: Easterly variation from True course (subtracts from True

course)

W: Westerly variation from True course (adds to True course)

12 Mode indication

A: Autonomous

D: Differential

N: Data not valid

Table C.11 RMC message fields (continued)

Field Description

AgGPS 332 GPS Receiver User Guide 93

NMEA-0183 Messages C

C.12VTG (Course Over Ground and Ground Speed)

The VTG (Velocity True Ground) message identifies the actual track

made good and speed over ground.

The VTG message structure is:

$GPVTG,0,T,,,0.00,N,0.00,K*33

Table C.12 describes these fields.

Note – Because the contents of this NMEA message do not change

significantly during a one-second interval, the receiver outputs this

message at a maximum rate of 1 Hz.

Table C.12 VTG message fields

Field Description

1 Track made good

2 Fixed text “T” shows that track made good is relative to true north

3 Not used

4 Not used

5 Speed over ground in knots (0–3 decimal places)

6 Fixed text “N” shows that speed over ground is in knots

7 Speed over ground in kilometers/hour (0–3 decimal places)

8 Fixed text “K” shows that speed over ground is in kilometers/hour

C NMEA-0183 Messages

94 AgGPS 332 GPS Receiver User Guide

C.13XTE (Cross-Track Error)

The XTE message reports the vessel’s cross-track error.

The XTE message structure is :

$GPXTE,A,A,0.050,L,N*5E

Table C.13 describes these fields.

Table C.13 XTE message fields

Field Description

1

2

3 Cross-track error, in nautical miles

4 Direction to steer

L: Left

R: Right

5N: Nautical mile units

AgGPS 332 GPS Receiver User Guide 95

NMEA-0183 Messages C

C.14ZDA (Time and Date)

The ZDA message identifies UTC time, day, month, and year, local zone

number and local zone minutes.

The ZDA message structure is:

$GPZDA,184830.15,05,11,1996,00,00*66

Table C.14 describes these fields.

Note – Because the contents of this NMEA message do not change

significantly during a one-second interval, the receiver outputs this

message at a maximum rate of 1 Hz.

Table C.14 ZDA message fields

Field Description

1UTC time

2Day

3Month

4 Year

5 Local zone number (– for East Longitude)

6 Local zone minutes

C NMEA-0183 Messages

96 AgGPS 332 GPS Receiver User Guide

C.15PTNLEV Proprietary (Event Marker)

The PTNLEV message is a Trimble proprietary message for

time-tagging and marking when an event input occurs. If enabled, this

event message is output whenever an event is detected.

The PTNLEV message structure is:

$PTNLEV,184804.00,0*XX

Table C.15 describes these fields.

Table C.15 PTNLEV message fields

Field Description

1 Time: UTC time of the position fix in hhmmss.ss format

2 Event number, starting with event 0

AgGPS 332 GPS Receiver User Guide 97

NMEA-0183 Messages C

C.16PTNLID Proprietary (Trimble Receiver ID)

The PTNLID message is a Trimble proprietary message for identifying

the receiver’s machine ID, product ID, major and minor release

numbers, and firmware release date.

The PTNLID message structure is:

$PTNLID,097,01,XXX,XXX,DD/MM/YY*XX

Table C.16 describes these fields.

The PTNLID message, if enabled, is output every 30 seconds.

Table C.16 PTNLID message fields

Field Description

1 Machine ID

2 Product ID

3 Major firmware release number

4 Minor firmware release number

5 Firmware release date, in dd/mm/yy format

C NMEA-0183 Messages

98 AgGPS 332 GPS Receiver User Guide

C.17PTNLDG Proprietary (Trimble DGPS Receiver

Status)

The PTNLDG message is a Trimble proprietary message for identifying

the DGPS receiver channel strength, channel SNR, channel frequency,

channel bit rate, channel number, channel tracking status, RTCM

source, and channel performance indicator for either beacon DGPS or

satellite DGPS.

The PTNLDG message structure is:

$PTNLDG,87.0,5.2,1558510.0,1200,2,4,1,25,,,*01

Table C.17 describes these fields.

Table C.17 PTNLDG message fields

Field Description

1 Channel signal strength, in 1 dBuV/m. For beacon, this is the

electromagnetic field intensity level. For satellite, this is the ADC

input voltage level.

2 Channel signal to noise (SNR) level, in dB

3 Channel frequency, in kHz

4 Channel bit rate, in bits per second (bps)

5 Channel number, 0–99

6 Channel tracking status

0: Channel idle

1: Wideband FFT search

2: Searching for signal

3: Channel has acquired signal

4: Channel has locked on signal

5: Channel disabled

7 Specified channel is used as RTCM source

0: Not used

1: Used

8 Channel tracking performance indicator. For beacon, this is the

number of errors in the last 255 words. For satellite, this is the time

since last sync, in tenths of seconds ranging from 0–255.

AgGPS 332 GPS Receiver User Guide 99

NMEA-0183 Messages C

The PTNLDG message fields are defined in free format.

The maximum number of characters in each field is indicated above

( for example, 25 bps displayed as xxx,25,xxx instead of xxx,00025,xxx).

If a channel is disabled, the channel fields can be null fields (showing

commas only). If more than one channel is available, the message

should be repeated for each channel.

This message can be enabled using TSIP. If enabled, it is output at the

NMEA report rate.

Note – Because the contents of this NMEA message do not change

significantly during a one-second interval, the receiver outputs this

message at a maximum rate of 1 Hz.

C NMEA-0183 Messages

100 AgGPS 332 GPS Receiver User Guide

C.18PTNL,GGK (Time, Position, Position Type, and

DOP)

The PTNL,GGK message structure is:

$PTNL,GGK,172814.00,071296,3723.46587704,

N,12202.26957864,W,3,06,1.7,EHT-6.777,M*48

Table C.18 describes these fields.

Table C.18 PTNL,GGK message fields

Field Description

1 UTC of position fix, in hhmmss.ss format

2 UTC Date of position, in mmddyy format

3 Latitude, in degrees and decimal minutes (for example,

dddmm.mmmmmmm)

4 Direction of latitude

N: North

S: South

5 Longitude, in degrees and decimal minutes (for example,

dddmm.mmmmmmm)

6 Direction of longitude

E: East

W: West

7 GPS quality indicator

0: Fix not available or invalid

1: Autonomous GPS fix

4: Differential, code phase only solution (DGPS)

8 Number of satellites used in GPS solution

9DOP of fix

10 Ellipsoidal height of fix (antenna height above ellipsoid)

11 M: Ellipsoidal height is measured in meters

AgGPS 332 GPS Receiver User Guide 101

NMEA-0183 Messages C

C.19PTNLSM Proprietary (RTCM Special)

The PTNLSM message is a Trimble proprietary message for identifying

the Reference Station ID and the ASCII Text message that is included in

an RTCM Type 16 Special Message. The PTNLSM message is generated

anytime an RTCM stream receives a valid Type 16 Special Message.

The PTNLSM message structure is:

$PTNLSM,0022,This is a message,*.XX

Table C.19 describes these fields.

Table C.19 PTNLSM message fields

Field Description

1 Reference station ID number, ranging from 0 to 1023. Leading

zeros must be added to fill four-digit field.

2 ASCII text message contained within the Type 16 RTCM message.

C NMEA-0183 Messages

102 AgGPS 332 GPS Receiver User Guide

APPENDIX

D

AgGPS 332 GPS Receiver User Guide 103

Third-Party Interface

Requirements D

In this appendix:

QSoftware

QHardware

D Third-Party Interface Requirements

104 AgGPS 332 GPS Receiver User Guide

D.1 Software

The following table lists the interface requirements for connecting an

AgGPS receiver to third-party software.

Software Company Protocol NMEA

messages

Baud

rate

Other Pos Rate Cable P/N

required

Notes

AgGPS

EZ-Map Trimble NMEA GGA 38.4K 8-N-1 5Hz 30945,

40947-18,

46441

Do not output ZDA

message.

AgView GIS

Solutions NMEA VTG, GLL 4800 8-N-1 1Hz 30945,

40947-18,

46441

FarmGPS Red Hen NMEA GGA, GSA,

VTG 4800 8-N-1 1 Hz 30945,

40947-18,

46441

Field Rover SST Dev

Group NMEA GGA, GSA,

GSV, VTG 4800 8-N-1 1 Hz 30945,

40947-18,

46441

Do not output MSS

message.

Field

Worker Pro Field

Worker NMEA GGA, GLL,

RMC, VTG 4800,

9600 8-N-1 1 Hz 30945,

40947-18,

46441

FieldLink

DOS Agris NMEA GGA, GSA,

VTG 4800,9

600 8-N-1 1 Hz 30945,

40947-18,

46441

FieldLink

Windows Agris NMEA GGA, GSA,

VTG 4800,

9600 8-N-1 1 Hz 30945,

40947-18,

46441

GuideMate Raven/Far

mworks NMEA GGA, VTG 19.2K 8-N-1 1 Hz, 5 Hz 30945,

40947-18,

46441

HGIS Starpal NMEA GGA, RMC 4800,

9600 8-N-1 1 Hz 30945,

40947-18,

46441

Instant

Survey AgriLogic

(Case-IH) NMEA GGA, GSA,

RMC 4800 8-N-1 1 Hz 30945,

40947-18,

46441

Pocket

Survey AgriLogic

(Case-IH) NMEA GGA, GSA,

RMC 4800 8-N-1 1 Hz 30945,

40947-18,

46441

SiteMate Farmworks NMEA GGA, VTG 4800 8-N-1 1 Hz 30945,

40947-18,

46441

SST Stratus SST Dev

Group NMEA GGA, RMC 38.4K 8-N-1 1 Hz 30945,

40947-18,

46441

AgGPS 332 GPS Receiver User Guide 105

Third-Party Interface Requirements D

D.2 Hardware

The following table lists the interface requirements for connecting an

AgGPS receiver to third-party hardware.

Company Hardware Protocol NMEA

messages

Baud

rate

Other Pos rate Cable P/N

required

Notes

Ag Leader Insight NMEA GGA, VTG 9600,

or

19.2K

8-N-1 5Hz 30945,

40947-18,

46441

Requires Ag Leader

adapter cable, P/N

2000819, or T-P/N

18532, or standard

serial cable with null

modem.

Ag Leader PF

Advantage NMEA GGA, VTG 4800 8-N-1 1 Hz 30945,

40947-18,

46441

Requires Ag Leader

adapter cable, P/N

2000929. Connect to

Aux1 port on

PFAdvantage.

Ag Leader PF3000

Yield

Monitor

NMEA GGA, VTG 4800 8-N-1 1 Hz 39903 Do not set position

output faster than

1Hz.

Ag Leader PF3000Pro

Monitor

without

GPS

NMEA GGA, VTG 4800 8-N-1 1 Hz 30945,

40947-18,

46441

Requires Ag Leader

adapter cable, P/N

2000929.

Connect to Aux1 port

on PF3000Pro.

Ag Leader Yield

Monitor

2000

NMEA GGA, VTG 4800 8-N-1 1 Hz 39903 P/N 39903 replaces

cable P/N 30660,

Do not set position

output faster than

1Hz.

AGCO FieIdStar

Yield

Monitor

(1997–mid

2001)

NMEA GGA, VTG,

GSV, GSA @

1 Hz, VTG

@ 5 Hz

9600 8-N-1 1 Hz, 5 Hz 30945,

40947-18,

46441

FieIdStar Com Unit is

DB9 male.

Requires a null

modem RS-232

adapter.

AGCO FieIdStar

Yield

Monitor

(2003 or

later)

NMEA GGA, VTG,

GSV, GSA @

1 Hz, VTG

@ 5 Hz

9600 8-N-1 1 Hz, 5 Hz 30945,

40947-18,

46441

Requires AGCO

adapter cable, P/N

71395221 (DB9 male

to 9 pin circular AMP

connector).

AGCO FieIdStar

Yield

Monitor

(mid 2001–

2002)

NMEA GGA, VTG,

GSV, GSA @

1 Hz, VTG

@ 5 Hz

9600 8-N-1 1 Hz, 5 Hz 30945,

40947-18,

46441

FieIdStar Com Unit is

DB9 female.

Requires a null

modem RS-232

adapter plus gender

changer, or a male-

male null modem

adapter.

AgNav Ag-Nav2 NMEA GGA, VTG 9600,

19.2K 8-N-1 5 Hz 30945

Auto

Control,

Inc.

AutoCal NMEA VTG 4800 8-N-1 5 Hz 30945 Adapter cable is

purchased from Jim

Graves, Auto Control

Inc., Houma, LA

D Third-Party Interface Requirements

106 AgGPS 332 GPS Receiver User Guide

Case Tyler Aim

Navigator NMEA GGA 19.2K 8-N-1 5 Hz 30945,

40947-18

Case-IH AFS Yield

Monitor w/

Universal

Display or

Universal

Display Plus

NMEA GGA, VTG 4800 8-N-1 1 Hz 32609,

(Case P/N

87302445)

Do not set position

output faster than

1Hz

Needs (Case P/N

87302445) when

hooking up to new

AFX Series.

Case-IH

(Ag Leader

YM2000)

AFS Yield

Monitor NMEA GGA, VTG 4800 8-N-1 1 Hz 32609 Do not set position

output faster than

1Hz

CNH Case-IH &

New

Holland

Yield

Monitors

CAN will auto-configure Requires P/N 46651.

Needs an extension

cable (P/N: 401129) if

using a smartspot

receiver.

Claas Caterpillar

Cebis Yield

Monitor

NMEA GGA 4800,

9600 8-N-1 1 Hz 30945,

40947-18,

46441

Cultiva ATC NMEA GGA, VTG 9600 8-N-1 5 Hz 30945,

40947-18

Cultiva Marker Lite NMEA GGA, VTG 9600 8-N-1 5 Hz 30945,

40947-18

Cultiva Marker Lti NMEA GGA, VTG 9600 8-N-1 5 Hz 30945,

40947-18

Del Norte Del Norte

Aerial

Guidance

RTCM 9600 8-N-1 1 Hz 30945 Requires a null

modem RS-232

adapter plus gender

changer, or a male-

male null modem

adapter.

John

Deere GreenStar

Yield

Monitor

(brown

mobile

processor)

NMEA GGA, GSA,

RMC 4800,

9600 8-N-1 1 Hz 34189

John

Deere GreenStar

Yield

Monitor

(silver

wedge box

mapping

processor)

NMEA GGA, GSA,

RMC 4800,

9600 8-N-1 1 Hz 34189

Mid-Tech CenterLine NMEA GGA, VTG 19.2K 8-N-1 5 Hz 30945,

40947-18,

46441

Mid-Tech DataLink NMEA VTG 19.2k 8-N-1 1 Hz 30945,

40947-18,

46441

Software version 5.0

required on

DataLink.

Mid-Tech Legacy 2000 NMEA GGA, VTG 19.2K 8-N-1 5 Hz 30945,

40947-

18,46441

Company Hardware Protocol NMEA

messages

Baud

rate

Other Pos rate Cable P/N

required

Notes

AgGPS 332 GPS Receiver User Guide 107

Third-Party Interface Requirements D

Mid-Tech Legacy 6000 NMEA GGA, VTG 38.4K 8-N-1 5 Hz 30945,

40947-18,

46441

Mid-Tech MC1000 NMEA GGA, VTG 19.2K 8-N-1 5 Hz 30945,

40947-18

Mid-Tech Swath XL NMEA GGA 19.2K 8-N-1 5 Hz 30945,

40947-18

New

Holland

(Ag Leader

PF3000)

New

Holland

PLMS Yield

Mont.

NMEA GGA, VTG 4800 8-N-1 1 Hz 39903 Do not set position

output faster than

1Hz.

OnBoard

Systems CropHawk

7/B HAWK 9600 8-N-1 1 Hz 30945 CropHawk wiring

harness has DB9

female connector.

Requires P/N: 40572

male-male null

modem or null

modem RS-232

adapter plus gender

changer adapter.

Pacific

Crest PDL Radio RTCM 9600 8-N-1 1 Hz 30945,

40947-18 Requires Pac Crest

adapter cable, Lemo-

to-DB9 male.

Position

Inc. Contour NMEA GGA 19.2K 8-N-1 5 Hz 30945,

40947-18

Raven AMS200 NMEA GGA, VTG,

ZDA, GSA 9600 8-N-1 1 Hz 30945,

40947-18,

46441

Raven Databoy NMEA GGA, VTG,

ZDA, GSA 4800 8-N-1 1 Hz 30945,

40947-18,

46441

Raven RGL 500/600 NMEA GGA, VTG 19.2K

,

38.4K

8-N-1 5 Hz, 10

Hz 30945,

40947-18

Raven SCS-4400 NMEA GGA, VTG,

ZDA, GSA 9600 8-N-1 1 Hz 30945,

40947-18,

46441

Raven SmarTrax NMEA GGA, VTG 38.4K 8-N-1 5 Hz, 10

Hz 30945,

40947-18

Raven Swath

Smart NMEA GGA, VTG 38.4K 8-N-1 5 Hz, 10

Hz 30945,

40947-18

Raven Viper

(Using

Raven

Lightbar)

NMEA GGA, VTG,

RMC 38.4K 8-N-1 5 Hz 30945,

40947-18,

46441

Be sure to turn GSA

“OFF”

Raven Viper

(Mapping/

VRT)

NMEA GGA, VTG,

RMC 4800/

9600 8-N-1 1 Hz 30945,

40947-18,

46441

Rockwell VCD (Vision

Display

Controller)

NMEA GGA, GLL,

VTG, ZDA 4800 8-N-1 1 Hz 30945,

40947-18,

46441

Company Hardware Protocol NMEA

messages

Baud

rate

Other Pos rate Cable P/N

required

Notes

D Third-Party Interface Requirements

108 AgGPS 332 GPS Receiver User Guide

SoilTeq Falcon II

Controller NMEA GGA, VTG 9600,

19.2K 8-N-1 5 Hz, 10

Hz 30945,

40947-18

SoilTeq Falcon VR

Controller NMEA GGA, VTG 9600 8-N-1 5 Hz 30945,

40947-18,

46441

SoilTeq Falcon VR

Controller

with Falcon

Track LBAR

NMEA GGA, VTG 9600,

19.2K 8-N-1 5 Hz, 10

Hz 30945,

40947-18

Springhill Ag

Navigator RTCM 9600 8-N-1 10 Hz 30945,

40947-18 Connect to COM1.

Make sure Pin 9 is

not connected.

Starlink LB-3, LB-4,

LB-5 NMEA GGA, VTG 19.2K 8-N-1 5 Hz, 10

Hz 30945,

40947-18

TeeJet GuideLine NMEA GGA 19.2K 8-N-1 5 Hz 30945,

40947-18

Terradox Sitewinder NMEA GGA 9600 8-N-1 5 Hz 30945,

40947-18

Trimble AgGPS

Autopilot

(DGPS)

TSIP 38.4K 8-N-1 5 Hz 43172 Connect to Port A on

AgGPS 132.

Firmware version 2.0

and later

automatically

configures the

AgGPS receiver port

communication.

Trimble AgGPS

Autopilot

(RTK)

GSOF 38.4K 8-N-1 5 Hz 43172 Connect to Port A on

AgGPS 214.

Firmware version 1.1

and later

automatically

configures the

AgGPS receiver port

communication.

Trimble TrimFlight™

GP400 RTCM 9600 8-N-1 1 Hz 34903

Trimble TrimFlight

MMD NMEA GGA, VTG 9600 8-N-1 5 Hz 30945 Connect to male DB9

port on MMD.

Trimble TrimFlight

TF300 RTCM 9600 8-N-1 1Hz 34903

Company Hardware Protocol NMEA

messages

Baud

rate

Other Pos rate Cable P/N

required

Notes

AgGPS 332 GPS Receiver User Guide 109

Index

Numerics

1 PPS output 8

A

accuracy 9

activating OmniSTAR 47

AgGPS 170 Field Computer 52

AgGPS 214 GPS receiver 9

AgGPS 332 receiver 4

components of 20

connecting to a Compaq iPAQ

computer 32

connecting to a laptop computer 31

connecting to a Windows CE

handheld computer 32

connecting to an EZ-Guide Plus

system 29

connecting to an EZ-Steer assisted

steering system 30

connection ports 6

default settings 74

environmental conditions 22

equipment it can be used with 4

features of 5

front panel 34

inputs 16

mounting 21, 25

outputs 16

overview 2, 4

physical specifications 72

power/data cable pin-out 68

standard features 5

AgGPS 70 RDL 53

AgGPS Autopilot system, settings for 46

AgGPS EZ-Guide Plus system, connecting

to 23

altitude 12, 16

antenna

electrical interference 22

location of 21

mounting 22, 26

physical characteristics 75

antenna cable, connecting 26

ASCII input 7

Autopilot, connecting to 23

B

base station 9

beacon

3rd order interception 75

channel selectivity 75

channel spacing 75

dynamic range of 75

Beacon DGPS 17

configuring the receiver for 49

status values in Beacon DGPS

mode 43

Index

110 AgGPS 332 GPS Receiver User Guide

C

cables 7

Compaq iPAQ handheld computer 32

connection diagram 23

data interface 69

laptop computer 31

routing 24

Windows CE 31, 32

Windows CE handheld computer 32

CAN bus protocol 5, 8

casing, specification 72

centimeter-level accuracy 9

Clear BB RAM screen 56

clearing battery-backed RAM 56

CMR

corrections for RTK 9, 52, 73

input from an external device 7

Compaq iPAQ handheld computer,

connecting 32

compliance, specification 72

components, standard 25

configuring

Display Options menu 54

RTK 49, 50

WAAS/EGNOS DGPS 48

connecting

antenna cable 26

external devices 23

optional Windows CE cable 31, 32

optional Windows CE with cigarette

power adaptor cable 31

connections, standard 23

connector ports see ports

connectors 7, 68

specification 72

Controller Area Network bus protocol see

CAN bus protocol

convergence 11

coordinate systems 14

correction source, changing 47

corrections, free or subscription 10

D

D/2D position type 40

D/3D position type 40

data/power cable 7

datums 14

default settings 74

default settings, returning to 56

DGPS coordinate systems 14

DGPS, accuracy of 16

DGPS, beacon 17

Differential GPS

configuring 47

positioning method 10

Display Options menu 54

documentation feedback 2

dual-frequency antenna

specifications 75

E

effect on GPS accuracy 13

EGNOS 10

accuracy of 9

DGPS, configuring 48

SNR values for 42

EGNOS website 10

electrical interference, sources of 22

elevation 13, 16

ellipsoids 14

enhancements 20

environmental conditions for receiver 22

ephemeris (satellite history) file 12, 16

equipment, types that can be used with the

receiver 4

Europe, notices to users iii

European Council Directive 89/336/EEC iii

Index

Ag

GPS 332 GPS Receiver User Guide 111

European Geostationary Navigation Overlay

System see EGNOS

European Space Agency website 10

external devices, connecting 23

EZ-Guide Plus system

connecting the receiver to 29

settings for 46

EZ-Steer assisted steering system

connecting the receiver to 30

settings for 46

F

factory default settings 56

Federal Aviation Administration website 10

field computer, connecting to 23

firmware

display-only fields 37

Home screen 39, 46

menu structure 36

multiple-choice fields 37

navigating the screens 35

text fields 38

firmware, updating 44

Flash Progress dialog 57

FlashLoader200 utility 57

free corrections 10

G

G/2D position type 40

G/3D position type 40

geographic de-correlation 18

GGA message 84

GLL sentence 85

GP Talker ID 80

GPS

atmospheric effects on 12

positioning methods 9

positioning methods and DGPS

coordinate systems 14

sources of error 12

troubleshooting problems 60

GPS positions

output format 8

output of 14

GPS specifications 72

GRS message 86

GSA message 87

GST message 88

GSV message 89

H

hardware, interfacing receiver to other 105

Home screen 39, 46

humidity, specifications 72

I

IALA (International Association of

Lighthouse Authorities) 17

II Talker ID 80

input, TSIP, RTCM, and ASCII 7

inputs 7

interference problems 62

ISO 11783 5

ISO 11783 messages 8

J

J1939 CAN bus 5, 8

Index

112 AgGPS 332 GPS Receiver User Guide

L

language, changing 54

laptop computer, connecting 31

latitude 12, 16

LC Talker ID 80

LG Talker ID 80

location of receiver 21

locking Configuration menus 55

longitude 12, 16

M

memory, removing settings 56

menus

Display Options 54

locking configuration 55

Microsoft Active Sync 44

mounting

the antenna 26

the receiver 25

bolt hole requirements 72

MS750 receiver 9

multipath 17

and accuracy 13

EVEREST technology 5

GPS channels 73

N

NAD-27 datum 14

NAD-83 datum 14

National Geodetic Survey website 14

National Marine Electronic Association

(NMEA) 78

National Marine Electronics Association see

NMEA

NMEA

output 7, 16, 53

protocol 5

screens 53

NMEA message

NMEA-0183 Messages Guide for

AgGPS Receivers 7

NMEA website 7

NMEA-0183 messages 78

checksum values 80

description 77

field formats 80

GGA 84

GLL 85

GRS 86

GSA 87

GST 88

GSV 89

latitude and longitude values 81

null fields 80

PTNL,GGK 100

PTNLDG 98

PTNLEV 96

PTNLID 97

PTNLSM 101

reading NMEA string format 81

RMC 91

sample structure 79

structure 78

structure of 78

summary 82

symbols and delimiters 79

Talker ID Codes 80

time values 81

VTG 93

XTE 94

ZDA 78, 95

notices to users

Europe iii

Index

Ag

GPS 332 GPS Receiver User Guide 113

O

OmniSTAR

activating 47

configuring the receiver for 47

HP DGPS positioning method 9, 11

specifications for L-Band satellite

differential correction receiver 74

VBS DGPS positioning method 11

XP DGPS positioning method 9

OmniSTAR website 11

optional extras 20

output 7

1 PPS 8

RTCM, TSIP, NMEA, 1 PPS 7

outputting

2D autonomous positions 40

2D differential positions 40

3D autonomous positions 40

3D differential positions 40

overview 3

P

P/N 30945 7, 23, 69

P/N 32608 26

P/N 37382 23

P/N 54609 23

P/N 9941 23

Palm Pilot 44

passcode 56

for FlashLoader200 57

password 55

PDOP 12, 16

performance of GPS channels 72

physical characteristics

combined antenna 75

pin-out diagrams

dual interface cable 69

Port A 68

Port B 68

tables 67

pin-out information, for standard power/data

cable 69

pocket PC 44

port connectors 68

port input settings 51

ports 5, 6

CAN 8

changing the settings 53

configuring 50

default settings for 52

output 5

serial, CAN bus support 8

setting output rate 53

specification 72

position output formats 8, 14

Position Type field 40

position types 40

positioning method, Differential GPS 10

power, specification 72

protocol

CAN bus 8

NMEA 5

RTCM 5

RtkLnk 7

TSIP 5

PTNL 78

PTNL,GGK message 100

PTNLDG message 98

PTNLEV message 96

PTNLID message 97

PTNLSM message 101

R

radio beacon

differential GPS positioning method 9

radio beacon signals 17

Index

114 AgGPS 332 GPS Receiver User Guide

radio noise emissions for Canada iii

Radio Technical Commission for Maritime

Services see RTCM

RAIM

GAST sentence 88

GRS output sentence 86

RAM, clearing 56

Real-Time Kinematic (RTK) GPS positioning

method 9

accuracy 9

base station coordinates 13

configuring for 50

datum and ellipsoid 14

GPS performance 72

number of satellites 12

option 20

port settings 52

radio connection 23

RtkLnk protocol 7

receiver problems 63

receivers

AgGPS 214 9

MS750 9

see also AgGPS 332 receiver

release notes 2

RMC message 91

routing cables 24

RS-232 5, 72

RTCM

input 7

output 7, 16

protocol 5

RTCM website 7

RTCM-compatible corrections 13, 17

RTK base station coordinate accuracy 13

RTK base stations

effects of GPS accuracy 13

RTK mode

configuring 50

RtkLnk protocol 7

port input setting 52

S

SAE International website 8

Satellite DGPS

mode for 39

mode status indicators 41

positioning method 9

signals 40

status indicators 15

status information 41

satellite history (ephemeris) file 12, 16

satellites

free radiobeacon differential

signals 17

number used 12, 16

searching 40

tracking 40

SBAS DGPS

signals 40

status values 42

searching, for satellites 40

security, locking menus 55

SiteNet 900 radio settings 52

SNR values

DGPS accuracy 16

GPS accuracy 12

status indicator in Satellite mode 15

WAAS/EGNOS DGPS mode 42

software

see also firmware

third-party 104

specifications 71

SRCH position type 40

standard features 5

standard power/data cable

pinout information 69

standard power/data connections 23

Index

Ag

GPS 332 GPS Receiver User Guide 115

status

satellite DGPS 15, 41

WAAS/EGNOS DGPS 15

subscription-based corrections 11

support, contacting 2

T

technical support 2

temperature, operating and storage

specification 72

third-party hardware 105

third-party software 104

time 12, 16

Time, Position, Position Type, and DOP

Values 100

tracking satellites 40

training courses 2

TRCK position type 40

Trimble 4000RSi reference station 13, 17

Trimble proprietary messages 78

Trimble SiteNet radio, connecting to 23

Trimble Standard Interface Protocol see TSIP

Trimble website 2

troubleshooting

GPS problems 60

interference problems 62

receiver problems 63

technical support contact 2

TSIP input 7

TSIP output 7, 16, 53

U

units, changing 54

US Coast Guard website 10

UTC

GRS sentence 86

GST sentence 88

utilities, FlashLoader 200 57

V

VTG sentence 93

W

WAAS

accuracy of 9

DGPS, configuring 48

SNR values for 42

WAAS corrections 10

WAAS website 10

WAAS/EGNOS DGPS

configuring the receiver for 48

status information 15

warnings

fuse to be provided 21

websites

European Space Agency 10

Federal Aviation Administration 10

for EGNOS 10

for WAAS 10

National Geodectic Survey 14

National Geodetic Survey 14

NMEA 7

OmniSTAR 11

RTCM 7

SAE International 8

Trimble 2

US Coast Guard 10

WAAS 10

Wide Area Augmentation System see WAAS

Windows CE handheld computer 44

connecting 32

Index

116 AgGPS 332 GPS Receiver User Guide

X

XTE message 94

Y

yield monitor, connecting to 23