Trimble AgGPS 124, AgGPS 132 Operation Manual

AgGPS™ 124 / 132

Operation Manual

Part Number: 38747-00
Revision: A
Date: Februa ry 1999

Trimble Navigation Limited
645 North Mary Avenue
Post Office Box 3642
Sunnyvale, CA 94088-3642
U.S.A.
[phone] in North America
[phone] International
FAX: [phone]
www.trimble.com

Trimble
Precision Agricultural Systems
9290 Bond Street, Suite 102
Overland Park, KS 66214
U.S.A.
[phone] in North America
[phone] International
FAX: [phone]
Trimble Navigation Europe Limited

Trimble House, Meridian Office Park
Osborn Way, Hook
Hampshire RG27 9HX
ENGLAND
[phone]
FAX: [phone]

Trimble Navigation Singapore PTE Limited
79 Anson Road
#05-02
Singapore 079906
SINGAPORE
[phone]
FAX: [phone]

Trimble Japan K.K.
Sumitomo Hamamatsu-cho, Building 10F
1-18-16 Hamamatsu-cho Minato-ku
Tokyo 105
JAPAN
[phone]
FAX: [phone]

Trimble Navigation New Zealand Limited
11 Birmingha m Dr i ve
P.O. Box 8729 Riccarton
Christchurch
NEW ZEALAND
[phone]
FAX: [phone]

Copyrights

© 1999 Trimble Navigation Limited. All rights reserved. No part of this manual may be
copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine­readable form without prior written consent from Trimble Navigation Limited.

Printed in the United States of America. Printed on recycled paper.

Release Notice

This is the February 1999 release (Revision A) of the

AgGPS 124/132 Operation Manual

,

part number 38747-00.

Trademarks

Trimble and the Trimble logo are t rademarks of Trimble Navigation Limited, registered in the
United States and other countries.

GPS, The Choice, and TSIP are trademarks of Trimble Navigation Limited.

Ag

Microsoft, MS-DOS, Windows, Windows 95, and Windo w s NT are registered trademarks or
trademarks of Microsoft Corporation. LandStar is a trademark and a service mark of Racal
NCS, Inc. Intel is a trademark of Intel Corporation. All other brand names are trademarks of
their respective holders.

Disclaimer of Warranty

E

XCEPT AS INDICATED IN

F

IRMWARE AND DOCUMENTATION IS PROVIDED “AS IS” AND WITHOUT EXPRESS OR LIMITED
WARRANTY OF ANY KIND BY EITHER TRIMBLE NAVIGATION LIMITED OR ANYONE WHO HAS
BEEN INVOLVED IN ITS CREATION, PRODUCTION, OR DISTRIBUTION INCLUDING BUT NOT
LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE

H

ARDWARE
NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES, SO THE ABOVE EXCLUSION MAY NOT
APPLY TO YOU

. THE

ENTIRE RISK, AS TO THE QUALITY AND PERFORMANCE OF THE TRIMBLE

, S

OFTWARE

.

“L

IMITED WARRANTY” HEREIN

, F

IRMWARE AND DOCUMENTATION, IS WITH YOU

, T

RIMBLE HARDWARE

, S

OFTWARE

. S

OME STATES DO

,

Limitation of Liability

I

N NO EVENT WILL TRIMBLE NAVIGATION LIMITED OR ANY PERSON INVOLVED IN THE
CREATION, PRODUCTION, OR DISTRIBUTION OF THE TRIMBLE SOFTWARE BE LIABLE TO YOU ON
ACCOUNT OF ANY CLAIM FOR ANY DAMAGES, INCLUDING ANY LOST PROFITS, LOST SAVINGS
OR OTHER SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES, INCLUDING BUT
NOT LIMITED TO ANY DAMAGES ASSESSED AGAINST OR PAID BY YOU TO ANY THIRD PARTY
RISING OUT OF THE USE, LIABILITY TO USE, QUALITY OR PERFORMANCE OF SUCH TRIMBLE

S

OFTWARE AND DOCUMENTATION, EVEN IF TRIMBLE NAVIGATION LIMITED OR ANY SUCH
PERSON OR ENTITY HAS BEEN ADVISED OF THE POSSIBILITY OF DAMAGES, OR FOR ANY CLAIM
BY ANY OTHER PARTY
LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES SO, THE ABOVE LIMITATIONS MAY
NOT APPLY TO YOU

. S

OME STATES DO NOT ALLOW THE LIMITATION OR EXCLUSION OF

.

,

,

Software and Firmware Limited Warranty

Trimble Navigation Limited warrants that Software and Firmware products will substantially
conform to the published specifications provided it is used with the Trimble products,
computer products, and oper ating s ystem for which it was designed. For a peri od of ninety (9 0)
days, commencing thirty (30) days after shipment from Trimble, Trimble also warrants that the
magnetic media on which Software and Firmware are distributed and the documentation are
free from defects in materials and workmanship. During the ninety (90) day warranty period,
Trimble will replace defectiv e media or documentation, or correct substantial program errors at
no charge. If Trimble is unable to replace defective media or documentation, or correct
program errors, Trimble will refund the price paid for The Software. These are your sole
remedies for any breach in warranty.

Hardware Limited Warranty

Trimble Navigation Limited products are warranted against defects in material and
workmanship for a period of one year. The warranty period shall commence thirty (30) days
after shipment from Trimble’s factory. Warranty service will be provided at a designated
Trimble Service Center . T rimble will at its option either repair or replace products that prove to
be defective. The Customer shall pay all shipping charges for products return ed to Trimble for
warranty service. Trimble shall pay all shipping charges for the return of products to the
Customer.

The above warranty shall not apply to defects resulting from:

1. Improper or inadequate maintenance by the buyer

2. Buyer-supplied software or interfacing

3. Unauthorized modification or misuse

4. Operation outside of the environmental specifications of the product

5. Improper installation, where applicable

6. Lightning or other electrical discharge

7. Fresh or salt water immersion or spray

8. Normal wear and tear on consumable parts (for example, batteries)

No other warranty is expressed or implied. Trimble Navigation Limited specifically disclaims
the implied warranties of fitness for a particular purpose and merchantability.

Contents

About This Manual

Scope and Audience . . . . . . . . . . . . . . . . . . . . . . . . .xix

Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xx

Related Information . . . . . . . . . . . . . . . . . . . . . . . . .xxi

Other Information . . . . . . . . . . . . . . . . . . . . . . . . . .xxi

Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . .xxii

Reader Comment Form. . . . . . . . . . . . . . . . . . . . . . . .xxiii

Document Conventions. . . . . . . . . . . . . . . . . . . . . . . .xxiii

Warnings, Cautions, Notes, and Tips. . . . . . . . . . . . . . . . .xxiv

Update Notes . . . . . . . . . . . . . . . . . . . . . . .xxi

World Wide Web (WWW) Site . . . . . . . . . . . . . .xxi

File Transfer Protocol (FTP) Site . . . . . . . . . . . . .xxi

1 Overview

1.1 Differential GPS Positioning . . . . . . . . . . . . . . . . . . . . .1-3

1.1.1 Sources of GPS Error . . . . . . . . . . . . . . . . . . .1-3

1.1.2 DGPS Accuracy . . . . . . . . . . . . . . . . . . . . . .1-4

1.2 Measuring GPS Accuracy . . . . . . . . . . . . . . . . . . . . . .1-7

1.2.1 Receiving Beacon DGPS . . . . . . . . . . . . . . . . .1-7

1.2.2 Receiving Satellite DGPS (AgGPS 132 only). . . . . . .1-9

1.3 Standard Features. . . . . . . . . . . . . . . . . . . . . . . . . . .1-10

Ag

GPS 124/132 Operation Manual v

Contents

1.4 Receive r Enhancements . . . . . . . . . . . . . . . . . . . . . . .1-11

1.4.1 Fast Rate (P/N 33176-10) . . . . . . . . . . . . . . . . .1-11

1.4.2 Differential Base Station (P/N 33176-30) . . . . . . . . .1-11

1.4.3 Everest Technology (P/N 33176-40) . . . . . . . . . . .1-11

1.5 Application Options . . . . . . . . . . . . . . . . . . . . . . . . .1-1 2

1.5.1 Parallel Swathing (P/N 34623) . . . . . . . . . . . . . .1-12

1.5.2 Ag Field Pack (P/N 32294) . . . . . . . . . . . . . . . .1-12

1.6 Receive r Connections . . . . . . . . . . . . . . . . . . . . . . . .1-13

1.6.1 ASCII, TSIP, and RTCM Input . . . . . . . . . . . . . .1-14

1.6.2 RTCM, TSIP and NMEA Output . . . . . . . . . . . . .1-14

1.6.3 1 PPS Output . . . . . . . . . . . . . . . . . . . . . . .1-14

2 Installing the AgGPS Receiver

2.1 Unpacking and Inspecting the Shipment . . . . . . . . . . . . . . .2-1

2.1.1 Opening the Shipping Carton . . . . . . . . . . . . . . .2-2

2.1.2 Reporting Shipping Problems . . . . . . . . . . . . . . .2-4

2.2 Installation Guidelines . . . . . . . . . . . . . . . . . . . . . . . .2-5

2.2.1 Choosing a Location. . . . . . . . . . . . . . . . . . . .2-5

2.2.2 Considering Environmental Conditions . . . . . . . . . .2-5

2.3 Mounting the Receiver . . . . . . . . . . . . . . . . . . . . . . . .2-6

2.4 Mounting the Antenna . . . . . . . . . . . . . . . . . . . . . . . .2-6

2.4.1 Sources of Electrical Interference . . . . . . . . . . . . .2-7

2.5 Routing and Connecting the Antenna Cable . . . . . . . . . . . . .2-8

2.6 Connecting External Devices. . . . . . . . . . . . . . . . . . . . .2-9

2.6.1 Connecting the Standard Data/Power Cable

(P/N 30945) . . . . . . . . . . . . . . . . . . . . . . . .2-10

2.6.2 Connecting the Optional CASE AFS Power/Data Cable

(P/N 32609) . . . . . . . . . . . . . . . . . . . . . . . .2-12

2.6.3 Connecting the Optional John Deere GreenStar Data Cable

(P/N 34189) . . . . . . . . . . . . . . . . . . . . . . . .2-13

vi

Ag

GPS 124/132 Operation Manual

2.6.4 Connecting the Optional Ag Leader Power/Data Cable

(P/N 30660) . . . . . . . . . . . . . . . . . . . . . . . .2-15

2.6.5 Connecting the Optional Power/Data RTCM/NMEA Cable

(P/N 32015) . . . . . . . . . . . . . . . . . . . . . . . .2-16

2.6.6 Connecting the Optional RDS Cable (P/N 35142) . . . .2-17

2.6.7 Connecting the Optional Windows CE with

Cigarette Power Adapter Cable (P/N 35283) . . . . . . .2-18

2.6.8 Connecting the Optional Windows CE Cable

(P/N 30661) . . . . . . . . . . . . . . . . . . . . . . . .2-18

3 Getting Started

3.1 Using the Front Pa nel. . . . . . . . . . . . . . . . . . . . . . . . .3-1

3.1.1 Viewing Status Screens . . . . . . . . . . . . . . . . . .3-3

3.2 The Home Screen. . . . . . . . . . . . . . . . . . . . . . . . . . .3-5

3.2.1 Beacon and Satellite Mode Home Screens . . . . . . . .3-6

Contents

3.3 Below Home Screen Configurables . . . . . . . . . . . . . . . . .3-11

3.3.1 Contrast . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

3.3.2 Units . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-12

3.3.3 Configuration Lockout Screen. . . . . . . . . . . . . . .3-13

3.3.4 Language Screen. . . . . . . . . . . . . . . . . . . . . .3-14

4 Operation Screens

4.1 Utility Screens . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2

4.1.1 Area Calculation. . . . . . . . . . . . . . . . . . . . . .4-3

4.1.2 Adjusted Area . . . . . . . . . . . . . . . . . . . . . . .4-4

4.1.3 Path Length . . . . . . . . . . . . . . . . . . . . . . . .4-5

4.1.4 Perimeter. . . . . . . . . . . . . . . . . . . . . . . . . .4-5

4.1.5 Segment Length . . . . . . . . . . . . . . . . . . . . . .4-5

Ag

GPS 124/132 Operation Manual vii

Contents

5Status

5.1 GPS Status Screens. . . . . . . . . . . . . . . . . . . . . . . . . .5-3

5.1.1 Location . . . . . . . . . . . . . . . . . . . . . . . . . .5-4

5.1.2 Altitude . . . . . . . . . . . . . . . . . . . . . . . . . .5-5

5.1.3 Velocity . . . . . . . . . . . . . . . . . . . . . . . . . .5-6

5.1.4 GPS Satellite Information . . . . . . . . . . . . . . . . .5-7

5.1.5 DOPs. . . . . . . . . . . . . . . . . . . . . . . . . . . .5-9

5.2 Beacon DGPS Status (Beacon Mode Only) . . . . . . . . . . . . .5-10

5.2.1 Beacon Status . . . . . . . . . . . . . . . . . . . . . . .5-11

5.2.2 Alternate Beacon . . . . . . . . . . . . . . . . . . . . .5-12

5.2.3 DGPS Data Source . . . . . . . . . . . . . . . . . . . .5-13

5.2.4 DGPS Age . . . . . . . . . . . . . . . . . . . . . . . . .5-14

5.3 Satellite DGPS Status (AgGPS 132 in Satellite Mode Only). . . . .5-15

5.3.1 Satellite Differential Status . . . . . . . . . . . . . . . .5-16

5.3.2 Service Provider ID . . . . . . . . . . . . . . . . . . . .5-17

5.3.3 DGPS Data Source . . . . . . . . . . . . . . . . . . . .5-18

5.3.4 DGPS Age . . . . . . . . . . . . . . . . . . . . . . . . .5-19

5.3.5 Racal-LandStar Service Info . . . . . . . . . . . . . . .5-20

5.3.6 OmniSTAR Service Info. . . . . . . . . . . . . . . . . .5-2 1

5.3.7 Service ID and Initialization Vector (IV) . . . . . . . . .5-22

5.4 Receive r Status . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-23

5.4.1 Time Screen . . . . . . . . . . . . . . . . . . . . . . . .5-23

5.4.2 Date and GPS Week . . . . . . . . . . . . . . . . . . . .5-24

5.4.3 Receive r Serial Number . . . . . . . . . . . . . . . . . .5-25

5.4.4 Firmware Version and Release Date. . . . . . . . . . . .5-26

5.4.5 Receive r Options. . . . . . . . . . . . . . . . . . . . . .5-27

5.4.6 System Voltages . . . . . . . . . . . . . . . . . . . . . .5-28

5.4.7 Incident Report . . . . . . . . . . . . . . . . . . . . . .5-29

5.5 CAN Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-29

5.5.1 Channel A Status . . . . . . . . . . . . . . . . . . . . .5-30

viii

Ag

GPS 124/132 Operation Manual

5.5.2 Channel B Status . . . . . . . . . . . . . . . . . . . . .5-31

6 Configuring the AgGPS 124 and 132 Receiver

Contents

6.1 Config uri ng the

GPS Receiver . . . . . . . . . . . . . . . . . .6-1

Ag

6.1.1 Using the Keypad to Change Configuration Settings . . .6-2

6.2 GPS Configuration . . . . . . . . . . . . . . . . . . . . . . . . . .6-3

6.2.1 Restore Defaults . . . . . . . . . . . . . . . . . . . . . .6-3

6.2.2 GPS Mode . . . . . . . . . . . . . . . . . . . . . . . . .6-4

6.2.3 System Masks . . . . . . . . . . . . . . . . . . . . . . .6-5

6.2.4 PDOP Settings. . . . . . . . . . . . . . . . . . . . . . .6-6

6.2.5 PV Filter and Position Rate . . . . . . . . . . . . . . . .6-7

6.2.6 Dynamic Mode . . . . . . . . . . . . . . . . . . . . . .6-8

6.3 DGPS Configuration . . . . . . . . . . . . . . . . . . . . . . . . .6-8

6.3.1 DGPS Mode . . . . . . . . . . . . . . . . . . . . . . . .6-9

6.3.2 DGPS Correction Age. . . . . . . . . . . . . . . . . . .6-10

6.3.3 DGPS Source (AgGPS 132 only) . . . . . . . . . . . . .6-10

6.3.4 Beacon Mode . . . . . . . . . . . . . . . . . . . . . . .6-11

6.3.5 EZ Beacon 0 . . . . . . . . . . . . . . . . . . . . . . . .6-12

6.3.6 EZ Beacon 1 . . . . . . . . . . . . . . . . . . . . . . . .6-13

6.3.7 Manual Beacon Frequencies. . . . . . . . . . . . . . . .6-14

6.3.8 Easy Satellite DGPS Configuration (AgGPS 132 Only) .6-15

6.3.9 Satellite Frequency (AgGPS 132 Only) . . . . . . . . . .6-16

6.3.10 Satellite Baud . . . . . . . . . . . . . . . . . . . . . . .6-17

6.3.11 OmniSTAR Activation. . . . . . . . . . . . . . . . . . .6-17

6.3.12 Racal Solution . . . . . . . . . . . . . . . . . . . . . . .6-18

6.4 Configuring Port Parameters . . . . . . . . . . . . . . . . . . . . .6-19

6.4.1 Setting the Port Input Parameters . . . . . . . . . . . . .6-20

6.4.2 Setting the Port Output Parameter . . . . . . . . . . . . .6-21

6.4.3 NMEA 1 Settings . . . . . . . . . . . . . . . . . . . . .6-22

6.4.4 NMEA 2 Settings . . . . . . . . . . . . . . . . . . . . .6-23

Ag

GPS 124/132 Operation Manual ix

Contents

6.4.5 NMEA 3 Settings . . . . . . . . . . . . . . . . . . . . .6-23

6.4.6 Message Rate . . . . . . . . . . . . . . . . . . . . . . .6-24

6.5 Configuring CAN Parameters . . . . . . . . . . . . . . . . . . . .6-25

6.5.1 CAN Rate . . . . . . . . . . . . . . . . . . . . . . . . .6-26

6.5.2 Address . . . . . . . . . . . . . . . . . . . . . . . . . .6-26

6.5.3 Message Tape . . . . . . . . . . . . . . . . . . . . . . .6-27

6.5.4 Interval. . . . . . . . . . . . . . . . . . . . . . . . . . .6-28

6.6 Base Station Configuration . . . . . . . . . . . . . . . . . . . . . .6-29

6.6.1 Base Location . . . . . . . . . . . . . . . . . . . . . . .6-30

6.6.2 Enabling Base Mode. . . . . . . . . . . . . . . . . . . .6-34

6.6.3 Port A Output . . . . . . . . . . . . . . . . . . . . . . .6-35

6.6.4 Port B Output . . . . . . . . . . . . . . . . . . . . . . .6-35

7 Troubleshooting

7.1 Increasing GPS Accuracy . . . . . . . . . . . . . . . . . . . . . .7-1

7.2 Intermittent GPS Loss . . . . . . . . . . . . . . . . . . . . . . . .7-3

7.3 Power Lines and Strong Magnetic Fields . . . . . . . . . . . . . .7-3

7.4 Choosing an Antenna Location. . . . . . . . . . . . . . . . . . . .7-4

7.5 Checking for Antenna Cable Failure . . . . . . . . . . . . . . . . .7-4

7.6 Why Beacon DGPS Works In Some Places But Not Others. . . . .7-4

7.7 Reducing Engine Noise. . . . . . . . . . . . . . . . . . . . . . . .7-5

7.8 Determining if the Beac on is Operable. . . . . . . . . . . . . . . .7-5

7.9 Losing the Beacon Signal at Night . . . . . . . . . . . . . . . . . .7-5

7.10 Using the Optional TSIP Talker Software . . . . . . . . . . . . . .7-6

7.11 Why Satellite DGPS Wo rks in Some Places But Not Others . . . .7-6

7.12 Interfacing the Receiver With Other RTCM Sources . . . . . . . .7-6

7.13 Verifying the RTCM Source is Outputting Messages . . . . . . . .7-7

7.14 Verifying the Unit is Outputting NMEA Messages . . . . . . . . .7-7

7.15 Losing Configur ation Settings When the Receiver is Powered Off .7-7

7.16 The Receiver Front Bulges Out. . . . . . . . . . . . . . . . . . . .7-8

x

Ag

GPS 124/132 Operation Manual

7.17 Restoring the Receiver to Factory Defaults . . . . . . . . . . . . .7-8

7.18 Troubleshooting Guides . . . . . . . . . . . . . . . . . . . . . . .7-9

A Specifications
B Receiver Defaults
C Cables and Connectors

C.1 Port A and Port B Connectors . . . . . . . . . . . . . . . . . . . .C-2

C.2 Standard Data/Power Cable . . . . . . . . . . . . . . . . . . . . .C-3

C.3 Ag Leader Interface Cable . . . . . . . . . . . . . . . . . . . . . .C-4

C.4 Dual Data Interface Cable . . . . . . . . . . . . . . . . . . . . . .C-5

C.5 Case AFS Cable . . . . . . . . . . . . . . . . . . . . . . . . . . .C-6

C.6 John Deere GreenStar Data Cable . . . . . . . . . . . . . . . . . .C-6

Contents

C.7 RDS Data Power Cable. . . . . . . . . . . . . . . . . . . . . . . .C-7

C.8 Windows CE Cable. . . . . . . . . . . . . . . . . . . . . . . . . .C-8

D NMEA-0183 Sentences

D.1 NMEA-0183 Sentence Structure . . . . . . . . . . . . . . . . . . .D-1

D.1.1 Symbols and Delimiters . . . . . . . . . . . . . . . . . .D-3

D.1.2 Checksum Values . . . . . . . . . . . . . . . . . . . . .D-4

D.1.3 Field Formats . . . . . . . . . . . . . . . . . . . . . . .D-4

D.1.4 Null Fields . . . . . . . . . . . . . . . . . . . . . . . . .D-4

D.1.5 Talker ID Codes . . . . . . . . . . . . . . . . . . . . . .D-5

D.1.6 Latitude and Longitude Values . . . . . . . . . . . . . .D-5

D.1.7 Time Values . . . . . . . . . . . . . . . . . . . . . . . .D-5

D.1.8 Other Values . . . . . . . . . . . . . . . . . . . . . . . .D-6

D.1.9 Reading NMEA String Format . . . . . . . . . . . . . .D-6

D.2 NMEA Sentence Summary. . . . . . . . . . . . . . . . . . . . . .D-6

D.3 ALM Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-8

Ag

GPS 124/132 Operation Manual xi

Contents

D.4 GBS Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-9

D.5 GGA Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-10

D.6 GLL Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-11

D.7 GRS Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-12

D.8 GSA Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-13

D.9 GST Sentence. . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-14

D.10 GSV Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-15

D.11 MSS Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-16

D.12 RMC Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-17

D.13 VTG Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-19

D.14 XTE Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-20

D.15 ZDA Sentence . . . . . . . . . . . . . . . . . . . . . . . . . . . .D-21

D.16 PTNLAG001 Proprietary Sentence. . . . . . . . . . . . . . . . . .D-22

D.17 PTNLID Proprietary Sentence . . . . . . . . . . . . . . . . . . . .D-23

D.18 PTNLDG Proprietary Sentence . . . . . . . . . . . . . . . . . . .D-24

D.19 PTNL,GGK Sentence. . . . . . . . . . . . . . . . . . . . . . . . .D-26

D.20 PTNLSM Proprietary Sentence . . . . . . . . . . . . . . . . . . .D-27

E Flash Loader 100

E.1 Connecting to the Flash Loader Software . . . . . . . . . . . . . .E-2

E.2 Using Flash Loader 100 . . . . . . . . . . . . . . . . . . . . . . .E-3

E.3 Running Flash Loader 100 . . . . . . . . . . . . . . . . . . . . . .E-4

F Activating a Satellite DGPS Service

F.1 OmniSTAR Activation . . . . . . . . . . . . . . . . . . . . . . . .F-3

F.2 Racal Activation . . . . . . . . . . . . . . . . . . . . . . . . . . .F-5

xii

Ag

GPS 124/132 Operation Manual

List of Figures

Figure 1-1

Figure 1-2 Back Panel . . . . . . . . . . . . . . . . . . . . . 1-13

Figure 2-1 Antenna Cable Connections . . . . . . . . . . . . . . 2-8

Figure 2-2 External Device Cable Connections . . . . . . . . . . . 2-10

Figure 2-3 CASE AFS Power/Data Cable Connection . . . . . . . . 2-12

Figure 2-4 GreenStar Data Cable Connection . . . . . . . . . . . . 2-13

Figure 2-5 Ag Leader Power/Data Cable Connections . . . . . . . . 2-15

Figure 2-6 Power/Data RTCM/NMEA Cable Connections. . . . . . . 2-16

Figure 3-1 AgGPS Screen Hierarchy . . . . . . . . . . . . . . . 3-2

Figure 3-2

Figure 3-3 Home Screen Hierarchy . . . . . . . . . . . . . . . . 3-5

Figure 3-4 GPS Status . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-5 Beacon DGPS Status . . . . . . . . . . . . . . . . . 3-8

Figure 3-6 Satellite DGPS Status. . . . . . . . . . . . . . . . . 3-9

Figure 4-1 Operation Screen Hierarchy . . . . . . . . . . . . . . 4-1

Figure 4-2 Area Calculation Screen. . . . . . . . . . . . . . . . 4-3

GPS Receiver. . . . . . . . . . . . . . . . . . . 1-1

Ag

GPS 124 and 132 Receiver Front Panel. . . . . . . . . 3-3

Ag

Figure 5-1 Status Screen Hierarchy . . . . . . . . . . . . . . . . 5-2

Figure 5-2 Location . . . . . . . . . . . . . . . . . . . . . . 5-4

Figure 5-3 Altitude . . . . . . . . . . . . . . . . . . . . . . 5-5

Figure 5-4 Velocity . . . . . . . . . . . . . . . . . . . . . . 5-6

Figure 5-5 GPS Satellite Information . . . . . . . . . . . . . . . 5-7

Figure 5-6 DOPs . . . . . . . . . . . . . . . . . . . . . . . 5-9

Figure 5-7 Beacon Status. . . . . . . . . . . . . . . . . . . . 5-11

Ag

GPS 124/132 Operation Manual xiii

List of Figures

Figure 5-8 Alternate Beacon . . . . . . . . . . . . . . . . . . 5-12

Figure 5-9 DGPS Data Source. . . . . . . . . . . . . . . . . . 5-13

Figure 5-10 DGPS Age . . . . . . . . . . . . . . . . . . . . . 5-14

Figure 5-11 Satellite Differential Status. . . . . . . . . . . . . . . 5-16

Figure 5-12 Service Provider ID . . . . . . . . . . . . . . . . . 5-17

Figure 5-13 DGPS Data Source. . . . . . . . . . . . . . . . . . 5-18

Figure 5-14 DGPS Age . . . . . . . . . . . . . . . . . . . . . 5-19

Figure 5-15 Time . . . . . . . . . . . . . . . . . . . . . . . 5-23

Figure 5-16 Date and GPS Week . . . . . . . . . . . . . . . . . 5-24

Figure 5-17 Receiver Serial Number . . . . . . . . . . . . . . . . 5-25

Figure 5-18 Firmware Version and Date . . . . . . . . . . . . . . 5-26

Figure 5-19 System Voltages . . . . . . . . . . . . . . . . . . . 5-28

Figure 5-20 Channel A Status . . . . . . . . . . . . . . . . . . 5-30

Figure 6-1 Configuration Sc reen Hierarchy. . . . . . . . . . . . . 6-2

Figure 7-1 System Hardware and Power Check Guide . . . . . . . . 7-9

Figure 7-2 GPS Reception Troubleshooting Guide . . . . . . . . . . 7-11

Figure 7-3 GPS Reception Troubleshooting Guide -

Using a Yield Monitor . . . . . . . . . . . . . . . . 7-13

Figure 7-4 Beacon Troubleshooting Guide . . . . . . . . . . . . . 7-15

Figure 7-5 OmniSTAR Troubleshooting Guide . . . . . . . . . . . 7-17

Figure 7-6 Racal-LandStar Troubleshooting Guide. . . . . . . . . . 7-19

Figure D-1 Sample ZDA Sentence Structure . . . . . . . . . . . . D-1

Figure F-1 OmniSTAR Activation Guide. . . . . . . . . . . . . . F-3

Figure F-2 Racal-LandStar Activation Guide . . . . . . . . . . . . F-5

xiv

Ag

GPS 124/132 Operation Manual

List of Tables

Table 2-1
Table 2-2

Table 2-3 AgGPS Receiver Components . . . . . . . . . . . . . 2-2

Table 2-4
Table 2-5

Table 2-6 Optional Components. . . . . . . . . . . . . . . . . 2-4

Table 3-1 Keypad Actions . . . . . . . . . . . . . . . . . . . 3-4

Table 3-2 Position Types . . . . . . . . . . . . . . . . . . . 3-7

Table 3-3 Options in Beacon Operating Mode . . . . . . . . . . . 3-9

Table 3-4 DGPS Signal-to-Noise Values . . . . . . . . . . . . . 3-10

Table 3-5 Satellite Differential Mode Status Indicators. . . . . . . . 3-10

Table 4-1 Area Calculation Functions . . . . . . . . . . . . . . 4-4

Table 5-1 Types of Recorded Positions . . . . . . . . . . . . . . 5-4

Table 5-2 Position Dimensions . . . . . . . . . . . . . . . . . 5-4

Table 5-3 Heading Values . . . . . . . . . . . . . . . . . . . 5-6

Table 5-4 Incomplete Satellite Data Messages . . . . . . . . . . . 5-8

GPS 132 Only Components . . . . . . . . . . . . . 2-2

Ag

GPS 124 Only Components . . . . . . . . . . . . . 2-2

Ag

GPS Receiver Enhancements. . . . . . . . . . . . . 2-3

Ag

GPS Application Options . . . . . . . . . . . . . . 2-3

Ag

Table 5-5 Racal-LandStar Subscription Options . . . . . . . . . . 5-20

Table 5-6 OmniSTAR Subscription Options . . . . . . . . . . . . 5-21

Table 5-7 Receive r Options . . . . . . . . . . . . . . . . . . 5-27

Table 5-8 Channel Status . . . . . . . . . . . . . . . . . . . 5-30

Table 6-1 GPS Mode Settings. . . . . . . . . . . . . . . . . . 6-4

Table 6-2 PDOP Mask and 2D-3D Settings . . . . . . . . . . . . 6-6

Table 6-3 PV Filter and Position Rate Settings . . . . . . . . . . . 6-7

Ag

GPS 124/132 Operation Manual xv

List of Tables

Table 6-4 DGPS Mode Settings . . . . . . . . . . . . . . . . . 6-9

Table 6-5 DGPS Source Settings . . . . . . . . . . . . . . . . 6-10

Table 6-6 Beacon Mode Settings . . . . . . . . . . . . . . . . 6-11

Table 6-7 Racal Station Settings. . . . . . . . . . . . . . . . . 6-18

Table 6-8 Port Input Parameter Sett ings. . . . . . . . . . . . . . 6-20

Table 6-9 Port Output Parameter Settings . . . . . . . . . . . . . 6-21

Table 6-10 Messages. . . . . . . . . . . . . . . . . . . . . . 6-27

Table A-1 AgGPS 124 and 132 Receiver . . . . . . . . . . . . . A-1

Table A-2 Combined Antenna. . . . . . . . . . . . . . . . . . A-2

Table A-3 GPS Channels. . . . . . . . . . . . . . . . . . . . A-3

Table A-4 Beacon Channels . . . . . . . . . . . . . . . . . . A-3

Table A-5 L-Band Satellite Different ial Correctio n Receiver with

Multiple Vendor Support (AgGPS 132 only). . . . . . . . A-4

Table B-1 Receiver Defaults . . . . . . . . . . . . . . . . . . B-1

Table C-1 Connector Pin-out for AgGPS 124 and 132 Port A and Port B . C-2

Table C-2 Standard Data/Power Cable Pin-out (P/N 30945) . . . . . . C-3

Table C-3 Ag Leader Yield Monitor Cable Pin-out (P/N 30660) . . . . C-4

Table C-4 Dual Data Interface Cable Pin-out (P/N 32015). . . . . . . C-5

Table C-5 Case AFS Cable Pin-out (P/N 32609) . . . . . . . . . . C-6

Table C-6 John Deere GreenStar Data Cable Pin-out (P/N 34189) . . . C-6

Table C-7 RDS Data Power Cable Pin-out (P/N 35142). . . . . . . . C-7

Table C-8 Windows CE Cable Pin-out (P/N 35283) . . . . . . . . . C-8

Table D-1 Sample ZDA Sentence Structure . . . . . . . . . . . . D-2

Table D-2 Supported Talker ID Codes . . . . . . . . . . . . . . D-5

Table D-3 Supported NMEA-0183 Sentences. . . . . . . . . . . . D-7

Table D-4 ALM Sentence Fields. . . . . . . . . . . . . . . . . D-8

Table D-5 GBS Sentence Fields . . . . . . . . . . . . . . . . . D-9

Table D-6 GGA Sentence Fields. . . . . . . . . . . . . . . . . D-10

Table D-7 GLL Sentence Fields . . . . . . . . . . . . . . . . . D-11

Table D-8 GRS Sentence Fields . . . . . . . . . . . . . . . . . D-12

xvi

Ag

GPS 124/132 Operation Manual

List of Tables

Table D-9 GSA Sentence Fields . . . . . . . . . . . . . . . . . D-13

Table D-10 GST Sentence Fields . . . . . . . . . . . . . . . . . D-14

Table D-11 GSV Sentence Fields . . . . . . . . . . . . . . . . . D-15

Table D-12 MSS Sentence Fields . . . . . . . . . . . . . . . . . D-16

Table D-13 RMC Sentence Fields. . . . . . . . . . . . . . . . . D-17

Table D-14 VTG Sentence Fields . . . . . . . . . . . . . . . . . D-19

Table D-15 XTE Sentence Fields . . . . . . . . . . . . . . . . . D-20

Table D-16 ZDA Sentence Fields . . . . . . . . . . . . . . . . . D-21

Table D-17 PTNLAG001 Sentence Fields . . . . . . . . . . . . . D-22

Table D-18 PTNLID Sentence Fields . . . . . . . . . . . . . . . D-23

Table D-19 PTNLDG Sentence Fields . . . . . . . . . . . . . . . D-25

Table D-20 PTNL,GGK Sentence Fields . . . . . . . . . . . . . . D-26

Table D-21 PTNLSM Sentence Fields . . . . . . . . . . . . . . . D-27

Table E-1 Flash Loader 100 Options . . . . . . . . . . . . . . . E-3

Ag

GPS 124/132 Operation Manual xvii

List of Tables

xviii

Ag

GPS 124/132 Operation Manual

About This Manual

Welcome to the

describes how to install and configure the AgGPS™ 124 and 132

receivers. It includes step-by-step instructions for installing the

AgGPS receiver and guidel ines for usin g the LCD sc reen displa y to

view and configure operating parameters. Also included are

guidelines for interfacing the receiver to a PC and agricultural

instruments, information about the selection of NMEA messages

supported by the r ecei v er, and connector pin-out diagra ms for Port A,

Port B, and cable connections.

Scope and Audience

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

products before, we recommend that you spend some time reading

this manual to lear n about the special features of this product. If you

are not familia r wit h GPS, we s ugge st tha t you rea d the booklet

A Guide to the Next Utility

The following sections provide a guide to this manual, as well as to

other documentation that you may have received with this product.

AgGPS 124 /132 Operation Manual

, available from Trimble.

. This manual

GPS,

Ag

GPS 124/132 Operation Manual xix

About This Manual

Organization

This manu al contains the following:

•

Chapter 1, Overview, provides a brief overview of
Differential GPS, and AgGPS 124 /132 components.

•

Chapter 2, Installing the AgGPS Receiver, contains
installation and inter facing instructions for the

GPS 124 and 132 receivers.

Ag

•

•

Chapter 3, Getting Started, gives instructions for using the

GPS 124 /132 display and keypad.

Ag

Chapter 4, Operation Screens, shows you how to record line
length and field area.

•

•

Chapter 5, Status, explains the status screens.
Chapter 6, Configuring the AgGPS 124 and 132 Receiver,

giv es instr uctions for configuring AgGPS 124 /132 operating
parameters.

•

Chapter 7, Troubleshooting, gives guidelines for solving
potential problems.

•

Appendix A, Specifications, identifies the physical
characteristics and general specifications of the AgGPS 124
and 132 receivers.

•

•

•

•

xx

Appendix B, Receiver Defaults, contains the default settings
for the AgGPS 124 and 132 receivers.

Appendix C, Cables and Connectors, includes pin-out
diagrams for the standard and optional cables.

Appendix D, NMEA-0183 Sentences, describ es t he s tr uct ur e
of NMEA messages generated by the AgGPS 124 and 132
receivers and the i nformation included in th em.

Appendix E, Flash Loader 100, explains ho w to use the Flash
Loader 100 software to update the receiver firmware.

Ag

GPS 124/132 Operation Manual

About This Manual

•

Appendix F, Activating a Satellite DGPS Service, provides
step-by-step instructions for ac tivating a satellite D GPS
service. (AgGPS 132 only)

Related Information

The following sections discuss other sources of information that

introduce, extend, or update this manual.

Update Notes

There is a warranty activation sheet with this product. Send it in to

receive update notes automatically as they become available. These

contain important information about software and hardware changes.

Contact your local Trimble Dealer for more information about the

support agreement contracts for software and firmware.

Other Information

This section lists sources that provide other useful information.

World Wide Web (WWW) Site

For an interactive look at Trimble, visit our site on the World Wide

Web:

•

File Transfer Protocol (FTP) Site

Use the Trimble FTP site to send files or to receive files such as

software patches, utilities, and FAQs. The address is:

•

You can also access the FTP site from the Trimble World Wide Web

site (www.trimble.com/support/support.htm).

www.trimble.com

ftp://ftp.trimble.com

Ag

GPS 124/132 Operation Manual xxi

About This Manual

Technical Assistance

If you ha ve a p roblem and cannot f ind the informati on you n eed in th e

product documentati on, contact your local dealer.

If you need further assistance, contact the Trimble Technical

Assistance Center (TAC) by phone, fax, or email. A support

technician can help determine the cause of the problem and provide

technical assistance.

To contact TAC:

Phone: +1-800-SOS-4TAC (North America)

Fax: [phone]

Email: [e-mail]

[phone] (International)
Phones are answered from 6 am to 5.30 pm Pacific

Standard Time.

When you contact TAC, have the following information available:

1. The Trimble pr odu ct na me, any software or f i rmware version
number(s), and if appropriate, the serial number.

2. Your specific question or problem.
Please detail background information, such as the

configuration of your data collector or receiver, and the exact
type, make, and configuration of your computer. If you have
received error messages, please specify the exact wording.

If you need to send a data file along with your inquiry, please
compress the fi le using PKZIP Sof tware b y PKWARE, Inc., and name

ZIP

the file with the extension .

.

Use one of the following methods to send the file:

• Attach the file to your email inquiry.

• Put the file on the Trimble FTP site and include the filename
in your email inquiry.

xxii

Ag

GPS 124/132 Operation Manual

Reader Comment Form

Thank you for purchasing this product. We would appreciate
feedback about the documentation. Use the reader comment form at
the back of this manual or, if this is not avai labl e, send comment s and
suggestions to t he addr ess i n the front . All c omments an d s uggesti ons
become the property of Trimble Navigation Limited.

Document Conventions

About This Manual

Italics

identify software menus, menu commands, dialog boxes, and

the dialog box fields.

SMALL CAPITALS

identify DOS commands, dir ectories, fi lenames, and

filename extensions.

Courier

Courier Bold

represents messages printed on the screen.

represents information that you must type in a

software screen or window.

Helvetica Bold

[Return]

or

identifies a software command button.

+

[Ctrl]

identifies a hardware function key or key

[C]

combination that you must press on a PC.

 

GPS 124 /132 LCD display.

Ag

1, 2, 3,

is used to show information displayed on the

and

are the buttons on the AgGPS 124 /132 front

4

panel.

Ag

GPS 124/132 Operation Manual xxiii

About This Manual

Warnings, Cautions, Notes, and Tips

Warnings, cautions, notes, and tips draw attention to important
information and indicate its nature and purpose.

M

I

*

F

Warning – W arnings alert you to situations that could cause personal
injury or unrecoverable data loss.

Caution – Cautions alert you to situations that could cause hardware
damage or software error.

Note – Notes give additional significant information about the subject
to increase your knowledge, or guide your actions.

Tip – Tips indicate a shortcut or other time- or labor-saving hint that
can help you make better use of the product.

xxiv

Ag

GPS 124/132 Operation Manual

1Overview

The AgGPS receiv ers c ombine hi gh-p erformance GPS recep tion wit h
radiobeacon DGPS capability in a single, lightweight, durable,
waterproof housing .

Additionally, the AgGPS 132 receiver (see Figure 1-1) contains
The Choice™ technology, enabling OmniSTA R and Racal LandStar
real-time differential cap abilities.

Figure 1-1

Ag

GPS 124/132 Operation Manual 1-1

GPS Receiver

Ag

Overview

1

As a part of a precision agriculture system, the AgGPS receiver
outputs s ubmeter GPS position information to a variety of farming
equipment, including yield monitors, parallel swathi ng guidance
systems, variable rate planters, spray application and soil sampling
controllers, and portable field computers.

The AgGPS receivers output real-time submeter positions and 0.1
mile-per-h our (0.1 6 kph ) v eloci ty acc urac y t hrough NMEA-01 83 and
TSIP (T rimble Standar d Interface Pr otocol) messag es. A 1 PPS (pulse
per second) stro be signal can als o be used to synchr onize time and log
event marker input when using external instruments.

1-2

Ag

GPS 124/132 Operation Manual

1 Overview

1.1 Differential GPS Positioning

The AgGPS receivers use differential GPS (DGPS) to achieve
submeter (<3.28 ft) accuracy. DGPS requires two or more receivers.
One receiver, called the reference or base station, is located at a
known point to determine the GPS measurement errors. An unlimited
number of mobile AgGPS receivers, sometimes called rovers, collect
data at unknown locations within the transmission range of the
reference station. The reference station broadcasts correction values,
which are a pplied to the AgGPS receiver posi tion. Errors common at
both the reference and rover receivers are corrected.

1.1.1 Sources of GPS Error

The largest source of GPS position error is Sel ective Availability
(S/A). S/A is induced by the U.S. government for the purpose of
restricting full GPS accuracy to all except authorized users. The
magnitude of S/A combined with other error sources results in
autonomous (single receiver) horizontal accuracies of up to 100
meters (328 feet). If the U.S. government turns S/A off, autonomous
GPS horizontal accuracy would be about 10 meters (32.8 feet).

Atmospheric conditions (especially in the ionosphere), multipath
(GPS signals bouncing off objects before reaching the antenna), and
receiver (electronic) noise are in large part responsible for the
remaining 10 meters (32.8 feet) of error.

DGPS removes most of the erro rs cause d by S/A and t he atmosphe re.
The AgGPS receivers use the latest advancements in receiver design
to minimize th ese errors. For more information about S/A,
atmospheric ef fe cts, and o ther sourc ed of error, revie w
tutorials found on the Trimble web site (

Ag

GPS 124/132 Operation Manual 1-3

WWW.TRIMBLE.COM

All About GPS

).

Overview

1.1.2 DGPS Accuracy

Accuracy of the AgGPS receiver wit h differential correction is better
than 1 meter RMS (3.2 feet) + 10 ppm times the distance between the
reference station and the mobile receiver given the following
conditions:

1

•

•

•

•

•

•

Number of satellites used: > 5
PDOP: < 4
Signal to Noise Ratio: > 6
Satellite Elevation Mask: > 7.5
Low multipath environment
RTCM-compatible corrections broadcast from a Trimble

4000RSi or equivalent

Number of visible satellites

Four or more satellites must be visible to calculate a three­dimensional position (latitude and longitude, altitude, and time).
Three or more satellites must be visible to calculate a two­dimensional position (latitude and longitude, and time). One or more
satellites must be visible to compute a zero-dimensional (time only)
position. Three-dimensional positions are most accurate. On the

GPS receiver you can set configurations to determine how many

Ag

satellites are used to compute GPS positions.

1-4

Ag

GPS 124/132 Operation Manual

1 Overview

Position Dilution of Precision (PDOP)

PDOP is a unitless meas ure indicating when the satellite geometry
can provide the most accurate results. When satellites are spread
around the sky, the PDOP value is low and the computed position is
most accurate. When the satellites are grouped closely together, the
PDOP is high and positions are less accura te. You can configure a
PDOP Mask to control the point at which the AgGPS receiver stops
outputting posit ion reports . For submet er accurac y , the PDOP must be
4 or less.

In some agricult ural a pplic ation s, a PDOP Mas k of 12 or more can be
used to prevent loss of data. However, accuracy can suffer as PDOP
rises. There is a trade-off between optimal GPS accuracy and
continuous operation.

Signal-to-Noise Ratio

Signal-to-Noise Ratio (SNR) is a measure of the satellite signal
strength. Accuracy improves as the signal strength increases. More
signal with less noise equals better accuracy. To compute positions
with strong signals, the SNR mask should be set to the default, 6 or
more.

Elevation Mask

When a satellite is low on the horizon, the GPS signals must travel a
great distance through the atmosphere, delaying reception by the

GPS receiver. You can minimize noisy data by adjusting (tuning)

Ag

the Elevation Mask. Satellites below the mask are excluded from the
position computat ion . The re commended setting for highest accuracy
is 8°. There i s a tra de-of f bet ween ac curac y and cont inuous operati on;
lowering the mask ensures continuous operation.

Ag

GPS 124/132 Operation Manual 1-5

Overview

Multipath

GPS signals are sometimes reflected off nearby objects, particularly
metallic objects , creating fa lse or erron eous results . This phenomenon
is known as multipath. Severe multipath can induce errors of many
meters, while mild multipath may cause small, undetectabl e errors.
Optimal accuracy is obtained by collecting data in an environment
that is devoid of large reflective surfaces, like buildings and trees. The

GPS receiver Everest™ multipath reduction option helps reduce

Ag

the effects of multipath.

Base station receiver

GPS receiver differential position accuracy is dependent upon the

Ag

differen tial correcti on quality supplied in t he RTCM SC-104 message
format.

1

1-6

Ag

GPS 124/132 Operation Manual