Ag Leader GPS 5200 User Guide

GPS 5200 Receiver

User Guide

www.agleader.com

User Guide

GPS 5200 Receiver

Version 1.00
Revision B
Part Number 56110-40-ENG
December 2008

Contact Information

Trimble Navigation Limited
Agriculture Business Area
9290 Bond Street, Suite 102
Overland Park, KS 66214
USA

[phone] Phone

[e-mail]
www.trimble.com

Legal Notices

© 2008, Trimble Navigation Limited. All rights reserved.
Trimble, the Globe & Triangle logo, and AgGPS are

trademarks of Trimble Navigation Limited, registered in the
United States and other countries. EVEREST, MS750, and
SiteNet are trademarks of Trimble Navigation Limited.

Microsoft 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 December 2008 release (Revision B) of the GPS
5200 Receiver User Guide, part number 56110-40-ENG. It

applies to version 1.00 of the GPS 5200 receiver.
The following limited warranties give you specific legal rights.

You may have others, which vary from state/jurisdiction to
state/jurisdiction.

Hardware Limited Warranty

Trimble Navigation Limited warrants that this hardware
product (the “Product”) will perform substantially in
accordance with published specifications and be
substantially free of defects in material and workmanship for
a period of one (1) year starting from the date of delivery. The
warranty set forth in this paragraph shall not apply to
software products.

Software License, Limited Warranty

This Trimble software product, whether provided as a stand­alone computer software product, built into hardware
circuitry as firmware, embedded in flash memory, or stored
on magnetic or other media, (the “Software”) is licensed and
not sold, and its use is governed by the terms of the relevant
End User License Agreement (“EULA”) included with the
Software. In the absence of a separate EULA included with
the Software providing different limited warranty terms,
exclusions and limitations, the following terms and
conditions shall apply. Trimble warrants that this Trimble
Software product will substantially conform to Trimble’s
applicable published specifications for the Software for a
period of ninety (90) days, starting from the date of delivery.

Warranty Remedies

Trimble's sole liability and your exclusive remedy under the
warranties set forth above shall be, at Trimble’s option, to
repair or replace any Product or Software that fails to
conform to such warranty (“Nonconforming Product”) or
refund the purchase price paid by you for any such
Nonconforming Product, upon your return of any
Nonconforming Product to Trimble in accordance with
Trimble’s standard return material authorization procedures.

Warranty Exclusions and Disclaimer

These warranties shall be applied only in the event and to the
extent that (i) the Products and Software are properly and
correctly installed, configured, interfaced , maintained, stored,

and operated in accordance with Trimble's relevant operator's
manual and specifications, and; (ii) the Products and
Software are not modified or misused. The preceding
warranties 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 or
Software with hardware or software products, information,
data, systems, interfaces or devices not made, supplied or
specified by Trimble; (ii) the operation of the Product or
Software 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 or Software; (iv) damage caused by accident,
lightning or other electrical discharge, fresh or salt water
immersion or spray; 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.

THE WARRANTIES ABOVE STATE TRIMBLE'S ENTIRE LIABILITY,
AND YOUR EXCLUSIVE REMEDIES, RELATI NG TO
PERFORMANCE OF THE PRODUCTS AND SOFTWARE. EXCEPT
AS OTHERWISE EXPRESSLY PROVIDED HEREIN, THE
PRODUCTS, SOFTWARE, AND ACCOMPANYING
DOCUMENTATION AND MATERIALS ARE PROVIDED “AS-IS”
AND WITHOUT EXPRESS OR IMPLIED WARRANTY OF ANY KIND
BY EITHER TRIMBLE NAVIGATION LIMITED 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 PRODUCTS OR SOFTWARE. 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. TRIMBLE
NAVIGATION LIMITED IS NOT RESPONSIBLE FOR THE
OPERATION OR FAILURE OF OPERATION OF GPS SATELLITES
OR THE AVAILABI LITY OF GPS SATELLITE SIGNAL S.

Limitation of Liability

TRIMBLE’S ENTIRE LIABILITY UNDER ANY PROVISION HEREIN
SHALL BE LIMITED TO THE AMOUNT PAID BY YOU FOR THE
PRODUCT OR SOFTWARE LICENSE. TO THE MAXIMUM EXTENT
PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL
TRIMBLE OR ITS SUPPLI ERS BE LIABLE FOR ANY INDIRECT,
SPECIAL , INCIDENTAL OR CONSEQUENTIAL DAMAGES
WHATSOEVER UNDER ANY CIRCUMSTANCE OR LEGAL
THEORY RELATI NG IN ANY WAY TO THE PRODUCTS,
SOFTWARE AND ACCOMPANYING DOCUMENTATION AND
MATERIALS, (INCLUDING, WITHOUT LIMITATION, DAMAGES
FOR LOSS OF BUSINESS PROFITS, BUSINE SS INTERRUPTION,
LOSS OF BUSINESS INFORMATION, OR ANY OTHER PECUNIARY
LOSS), REGARDLES S WHETHER TRIMBLE HAS BEEN ADVISED
OF THE POSSIBILITY OF ANY SUCH LOSS AND REGARDL ESS 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.

NOTE: THE ABOVE LIMITED WARRANTY PROVISIONS MAY NOT
APPLY TO PRODUCTS OR SOFTWARE PURCHASED IN THE
EUROPEAN UNION. PLEASE CONTACT YOUR TRIMBLE DEALER
FOR APPLICABLE WARRANTY INFORMATION.

2 GPS 5200 Receiver User Guide

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Related information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Technical assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Your comments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

2 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Standard features of the GPS 5200 receiver . . . . . . . . . . . . . . . . . . . . . . . .8

Receiver connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Receiver input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

LED indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

GPS positioning methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

RTK GPS positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Differential GPS positioning (DGPS). . . . . . . . . . . . . . . . . . . . . . . 15

Autonomous GPS positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Sources of error in GPS positioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Coordinate systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3 Installing the Receiver . . . . . . . . . . . . . . . . . . . . . . .21

System components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Optional extra . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Mounting the receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Choosing a location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Environmental conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Electrical interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Connecting to an external device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

GPS 5200 Receiver User Guide 3

Contents

Connectors and pinouts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Port A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Port B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Radar output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4 Configuring the Receiver . . . . . . . . . . . . . . . . . . . . .31

AgRemote Home screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Configuring Differential GPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

OmniSTAR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

WAAS/EGNOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Configuring the GPS 5200 receiver to operate in RTK mode . . . . . . . . . . . . 35

Configuring the communication ports. . . . . . . . . . . . . . . . . . . . . . . . . . 36

Configuring input/output communication. . . . . . . . . . . . . . . . . . . 36

5 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . .41

Global Positioning System (GPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Interference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

GPS receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

AgRemote utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

FlashLoader 200 upgrade utility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

A Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

GPS 5200 receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

GPS channels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

L-band satellite differential correction receiver . . . . . . . . . . . . . . . . . . . . 52

Receiver default settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

B Third-Party Interface Requirements . . . . . . . . . . . . . . .53

Third-party software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54

Third-party hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

4 GPS 5200 Receiver User Guide

CHAPTER

1

Introduction 1

In this chapter:

 Warnings

 Related information

 Technical assistance

 Your comments

Welcome to the GPS 5200 Receiver User
Guide. This manual:

• Describes how to install and

configure the GPS 5200 receiver.

• Provides guidelines for connecting

the receiver to an external device.

• Provides guidelines for using the

AgRemote utility to view and
configure the receiver correction
sources and other operating
parameters.

Even if you have used other Global
Positioning System (GPS) products
before, we recommend that you spend
some time reading this manual to learn
about the special features of this product.

If you are not familiar with GPS, go to the
Trimble website at www.trimble.com for
an interactive look at GPS.

GPS 5200 Receiver User Guide 5

1 Introduction

Warnings

Always follow the instructions that accompany a warning.

C

C

WARNING – Indicates a potential hazard or unsafe practice that could

result in injury or property damage.

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

source (lead) to the model GPS 5200 receiver should be provided with a
10 A (maximum) fuse.

Related information

Release notes describe new features, provide information that is not
included in the manuals, and identify changes to the manuals. You can
download release notes from the AgLeader website.

Technical assistance

If you have a problem and cannot find the information you need in the
product documentation, contact your local Reseller.

Your comments

Your feedback about the supporting documentation helps us to improve
it with each revision. Email your comments to

[e-mail].

6 GPS 5200 Receiver User Guide

CHAPTER

2

Overview 2

In this chapter:

 Standard features of the

GPS 5200 receiver

 Receiver connections

 Receiver input/output

 LED indicator

 GPS positioning methods

 Sources of error in GPS

positioning

This chapter describes the GPS 5200
receiver and gives an overview of GPS,
DGPS, and related information. When
used with a Real-Time Kinematic (RTK)
base station, the GPS 5200 receiver
provides RTK positioning for high­accuracy, centimeter-level applications.
For physical specifications, see

Appendix A, Specifications.

GPS 5200 Receiver User Guide 7

2 Overview

Standard features of the GPS 5200 receiver

A standard GPS 5200 receiver provides the following features:

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

• Horizontal RTK positioning accuracy 2.5cm (0.98in) + 2ppm,

2 sigma; vertical RTK positioning accuracy 3.7 cm (1.46 in)
+ 2 ppm, 2 sigma

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

satellites and a PDOP of less than four

• Combined GPS/DGPS receiver and antenna

• System level cable

• AgRemote utility with four-button keypad to configure and view

system properties. You can download this utility from the Ag
Leader website at www.agleader.com.

• LED status indicator

• The receiver 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.

• Radar output

• WAAS differential correction compatibility

• AgGPS

• EVEREST

• OmniSTAR VBS, XP, and HP positioning compatibility

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

CAN

– J1939 and NMEA 2000 messages

Note – The GPS 5200 receiver is ISO 11783 compliant. It supports some
ISO 11783 messages.

8 GPS 5200 Receiver User Guide

®

170 Field Computer compatibility

™

multipath rejection technology

RS-232

LED indicator

Port A Port B

– 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

Receiver connections

The following figure shows the connector ports and the LED indicator
on the GPS 5200 receiver:

Overview 2

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

GPS 5200 Receiver User Guide 9

2 Overview

• provide support for the J1939 (CAN) serial bus

For more information about the inputs, outputs, and LED indicators,
see the information in the rest of this section.

Receiver input/output

The GPS 5200 receiver data/power cable (P/N 50166) 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.

TSIP is input/output when communicating with AgRemote.

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.

10 GPS 5200 Receiver User Guide

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.

• 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.

Overview 2

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 GPS 5200 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.

GPS 5200 Receiver User Guide 11

2 Overview

LED indicator

The GPS 5200 receiver has an LED light that shows the status of the
receiver. The following tables describe the light sequences for each
positioning method.

Table 2.1 LED sequences with Satellite Differential GPS or autonomous positioning

LED color LED flash Status

Off Off No power

Green Solid Normal operation: computing DGPS positions

Green Slow No DGPS corrections: computing DGPS positions using old

corrections

Green Fast No DGPS corrections approaching DGPS age limit: computing DGPS

positions using old corrections

Yellow Solid DGPS corrections being received but DGPS positions not yet being

computed: computing autonomous GPS positions

Yellow Slow No DGPS corrections: computing autonomous GPS positions

Yellow Fast Not enough GPS signals: not tracking enough satellites to compute

position

Note – WAAS/EGNOS and OmniSTAR VBS use the Satellite Differential
GPS positioning method.

Table 2.2 LED sequences with RTK positioning

LED color LED flash Status

Off Off No power

Green Solid Normal operation: computing fixed RTK positions

Green Slow Receiving CMR corrections but not initialized: computing float RTK

positions

Green Fast No CMR corrections: computing RTK position using old corrections

12 GPS 5200 Receiver User Guide

Overview 2

Table 2.2 LED sequences with RTK positioning (continued)

LED color LED flash Status

Yellow Solid Receiving CMR corrections but unable to calculate RTK position:

computing DGPS (if WAAS/EGNOS is unavailable) or autonomous
position

Yellow Slow No CMR corrections: computing DGPS or autonomous position

Yellow Fast Not receiving CMR corrections: not computing positions

Table 2.3 LED sequences with OmniSTAR HP positioning

LED color LED flash Status

Off Off No power

Green Solid Normal operation: computing converged OmniSTAR HP positions

Green Slow Receiving OmniSTAR HP corrections, but only able to compute

unconverged position

Green Fast Receiving OmniSTAR HP corrections, but an HP error occurred

Yellow Solid Receiving OmniSTAR HP corrections but unable to calculate a

position: computing DGPS or autonomous solution

Yellow Slow No OmniSTAR HP corrections: computing DGPS or autonomous

position

Yellow Fast Not tracking OmniSTAR HP corrections: no positions

GPS 5200 Receiver User Guide 13

2 Overview

GPS positioning methods

GPS positioning systems are used in different ways to provide different
levels of accuracy. Accuracy is measured in absolute terms, that is, you
know exactly where you are in a fixed reference frame.

Table 2.4 summarizes the GPS positioning methods. Imperial units in
this table are rounded to two decimal places. The values shown are
2sigma.

Table 2.4 Absolute accuracy of GPS positioning methods

GPS positioning
method

Real-Time Kinematic
(RTK) GPS

Satellite Differential GPS OmniSTAR VBS 78 cm (30.71 inch)

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

OmniSTAR HP
Differential GPS

1

Convergence 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.

Corrections used Approximate absolute accuracy

Trimble CMR corrections
broadcast by a local
base station

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

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

3.7 cm (1.46 inch) + 2 ppm vertical accuracy

converged

1

For more information about each positioning method, see below.

RTK GPS positioning

The GPS 5200 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 GPS 5200 receiver is a
rover receiver, so another compatible receiver, such as a Trimble

™

MS750
receiver, must be used as the base station.

, AgGPS 214, AgGPS RTK Base 450, or AgGPS RTK Base 900

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

14 GPS 5200 Receiver User Guide

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/

Differential GPS positioning (DGPS)

For differential positioning, the GPS 5200 receiver uses corrections from
WAAS/EGNOS satellites or from OmniSTAR VBS or HP satellites.

These differential systems use special algorithms to provide differential
corrections that allow the rover receiver to calculate its position more
accurately.

Free corrections

Overview 2

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.

Subscription-based corrections

The GPS 5200 receiver uses OmniSTAR HP or OmniSTAR VBS
differential corrections in the same way that it uses WAAS/EGNOS
corrections.

OmniSTAR corrections are provided on a subscription basis.

GPS 5200 Receiver User Guide 15

2 Overview

Autonomous GPS positioning

The corrections that are produced by OmniSTAR HP algorithms are
more accurate than the corrections that are produced by OmniSTAR
VBS algorithms. The accuracy of the positions reported using
OmniSTAR HP 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 the distance to the closest OmniSTAR
corrections base station. OmniSTAR is continually improving the
service.

For more information about OmniSTAR, go to the OmniSTAR website at

www.omnistar.com. For information about activating an OmniSTAR

subscription, see OmniSTAR, page 33.

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
is comparable to the other methods.

16 GPS 5200 Receiver User Guide

Sources of error in GPS positioning

The GPS positioning method influences the accuracy of the GPS
position that is output by the GPS 5200 receiver. The factors described
in Table 2.5 also affect GPS accuracy.

Table 2.5 Factors that influence the accuracy of GPS positions

Overview 2

Condition Optimum

value

Atmospheric
effects

Number of
satellites used

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

Signal-to-noise
ratio

Minimum
elevation

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

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

Description

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.

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 GPS 5200 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.

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 (SNR) is a measure of the signal strength
against electrical background noise. A high SNR gives better
accuracy.

and noisy signals and are more difficult for the receiver to
track. Satellites below the minimum elevation angle are not
tracked.

GPS 5200 Receiver User Guide 17

2 Overview

Table 2.5 Factors that influence the accuracy of GPS positions (continued)

Condition Optimum

value

Multipath
environment

RTCM-compatible
corrections

RTK Base station
coordinate
accuracy

Multiple RTK base
stations

Low Multipath errors are caused when GPS signals are reflected off

Description

nearby objects and reach the receiver by two or more different
paths. The receiver incorporates the EVEREST multipath
rejection option.

These corrections are broadcast from an AgGPS 214, MS750, or
equivalent reference station.

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.

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.

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.

18 GPS 5200 Receiver User Guide

Overview 2

The GPS 5200 receiver outputs position coordinates in several datums
and ellipsoids depending on the GPS positioning method being used.
See Table 2.6.

Table 2.6 DGPS coordinate systems

GPS positioning method Datum Ellipsoid

None – Autonomous mode WGS-84

OmniSTAR VBS North American Beams NAD-83

OmniSTAR VBS Rest of World Beams ITRF

OmniSTAR HP ITRF 2000 ITRF 2000

WAAS Beams WGS-84 WGS-84

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.

1

2

3

WGS-84

GRS-80

GRS-80

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

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

GPS 5200 Receiver User Guide 19

2 Overview

20 GPS 5200 Receiver User Guide

CHAPTER

3

Installing the Receiver 3

In this chapter:

 System components

 Mounting the receiver

 Connecting to an external

device

 Connectors and pinouts

 Radar output

This chapter describes how to check the
equipment that you have received, set up
the receiver, and connect the receiver to
another device.

GPS 5200 Receiver User Guide 21

3 Installing the Receiver

System components

Check that you have received all components for the GPS 5200 system
that you have purchased . If any containers or components are damaged,
immediately notify the shipping carrier. The following components ar
included:

Quantity Description

1 GPS 5200 DGPS receiver (P/N 56000-01)

1 System level cable (P/N 50165 or 50166)

1 Mounting plate assembly (P/N 51312-00)

1 Port B plug (P/N 51062)

1 GPS 5200 Receiver User Guide

Optional extra

You may also have ordered the following receiver option:

Quantity Description

1 RTK capability (P/N 51264)

(this manual, P/N 56100-00-ENG)

Mounting the receiver

C

22 GPS 5200 Receiver User Guide

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

source (lead) to the model GPS 5200 receiver should be provided with a
10 A (maximum) fuse.

Secure the GPS 5200 receiver directly to the mounting plate assembly
(P/N 51312-00) and insert three bolts through the holes that are in the
housing and in the mounting plate assembly. Torque the bolts to
75–80 inch pounds.

Installing the Receiver 3

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 Autopilot system, please refer to the installation
instructions that are provided with the Autopilot system.

• 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.

GPS 5200 Receiver User Guide 23

3 Installing the Receiver

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

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

24 GPS 5200 Receiver User Guide

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:

Installing the Receiver 3

To connect the GPS 5200
receiver to ...

an Autopilot system P/N 50165

a Field computer P/N 50166

a Yield monitor P/N 50166

a Trimble SiteNet™ radio, for RTK
positioning

use the cable ...

(this cable has no DB9 connector)

P/N 49801

To convert the GPS 5200 receiver to a 12-pin conxall cable, use the
adapter cable (P/N 50581).

Plug the ... into ...

Deutsch 12-pin connector Port A on the back of the receiver

straight DB9-pin connector the external device

power connectors a power supply

Note – Do not bend the cable at the Deutsch connector. When you secure
the cable, use the supplied P-Clip. The P-Clip provides additional support
to the connectors and reduces the risk of damage.

GPS 5200 Receiver User Guide 25

3 Installing the Receiver

GPS 5200 receiver

DB9

cable (P/N 50166)

Ground –ve

Power +ve

Deutsch 12-pin

LED indicator

Port A Port B

System level

To external
device

GPS 5200 receiver

The following figure shows how to connect the receiver to an external
device using the system level cable (P/N 50166):

26 GPS 5200 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

Installing the Receiver 3

Note – Do not bend the cable at the Deutsch connector. When you secure
the cable, use the supplied P-Clip. The P-Clip provides additional support
to the connectors and reduces the risk of damage.

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 GPS
5200 receiver. The configuration tools for the external device should be
provided with the device. For more information about configuring the
receiver, see Chapter 4. For information about connecting a particular
external device, refer to the manual for that device or contact your local
Reseller.

Note – Use a connector plug (P/N 51062) to cover Port B when that port is
not in use. For example, cover Port B when you are using the receiver in a
non-RTK mode.

GPS 5200 Receiver User Guide 27

3 Installing the Receiver

213456

789101112

Connectors and pinouts

Use the following pinout information if you need to wire a cable for use
with the GPS 5200 receiver:

Port A

Port A on the receiver has a 12-pin Deutsch DTM connector. For cables,
use the mating connector, Deutsch part number DTM06-12SA.

Viewed from outside the receiver, the Port A connector is on the left. It
is the port that is typically used to connect to an Autopilot system.

Pin Name/Function Comments

1 CAN A High I/O

2 Port 1 RS232 Tx OUT When held to ground during power up,

puts unit into Monitor mode

3 Port 1 RS232 Rx IN

4PPS OUT

5 Signal GND Used for RS232 and other signals.

6 Port 1 RTS OUT

7 Radar OUT / Alarm OUT

Should not be connected to
V– (battery negative)

28 GPS 5200 Receiver User Guide

Installing the Receiver 3

Pin Name/Function Comments

8 Port 1 CTS IN

9Event IN

10 V+ IN

11 V- IN

12 CAN A Low I/O

Port B

This port has the same connector as Port A, see above. Viewed from
outside the receiver, the Port B connector is on the right. It is the port
that is typically used to connect to the SiteNet 900 radio.

Pin Name/Function Comments

1 CAN B High I/O

2 Port 2 RS232 Tx OUT

3 Port 2 RS232 Rx IN

4 PPS OUT

5 Signal GND Used for RS232 and other signals.

Should not be connected to V–
(battery negative)

6 Port 2 RTS OUT

or Port 3 RS232 Tx OUT

7 Radar OUT / Alarm OUT

8 Port 2 CTS IN or Port 3

RS232 Rx IN

9Event IN

10 V+ IN / OUT Maximum output current = 1.25 A

11 V– IN / OUT Maximum output current = 1.25 A

12 CAN B Low I/O

GPS 5200 Receiver User Guide 29

3 Installing the Receiver

Radar output

On the GPS 5200 receiver, Pin 7 on both Port A and Port B can be used
as Event Out, Alarm out, and Radar out. This pin can supply 5 V at
45 mA and sink up to 200 mA; the switching frequency of the circuit can
be up to 10 KHz.

The GPS 5200 receiver can output simulated radar pulses at a
pre-defined speed pulse output rate that is useful to replace the
radar/true ground speed sensor for speed on the vehicle or to send
speed to any other agricultural device that requires speed pulses, for
example, a yield monitor or variable rate controller.

Please contact your local reseller for cabling options.

30 GPS 5200 Receiver User Guide

CHAPTER

4

Configuring the Receiver 4

In this chapter:

 AgRemote Home screen

 Configuring Differential

GPS

 Configuring the GPS 5200

receiver to operate in RTK

mode

 Configuring the

communication ports

Use either the Autopilot interface or the
AgRemote utility to change configuration
settings in the GPS 5200 receiver. You will
need to configure the receiver if you
connect to a third-party device, for
example.

• If an Autopilot system is configured

to use a GPS 5200 receiver, and the
port on the receiver is set to
8-N-1 38.4 K, the Autopilot system
automatically configures the
receiver.

• The AgRemote utility is available

from the Ag Leader website
(www.agleader.com). This chapter
describes how to use the utility to
perform some common
configurations.

Note – OmniSTAR VBS and HP are
subscriber services that need to be
activated. For more information, see

OmniSTAR, page 33.

GPS 5200 Receiver User Guide 31

4 Configuring the Receiver

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

AgRemote Home screen

The following figure shows the AgRemote Home screen when WAAS
corrections are being received:

For more information about these fields and how they change as you
change GPS mode, refer to the document called AgRemote Software on
the Trimble website (www.trimble.com) or contact your local Reseller.

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:

32 GPS 5200 Receiver User Guide

• 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.

Configuring the Receiver 4

• 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 15.

OmniSTAR

The GPS 5200 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 use the AgRemote utility to activate an OmniSTAR subscription:

1. Connect the GPS 5200 receiver to the computer. Turn on the
receiver and start the AgRemote utility. For instructions on how
to use AgRemote, refer to the AgRemote documentation.

2. In AgRemote, select Configuration / DGPS Config.

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

– Omnistar HP

– Omnistar VBS

4. 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.

5. Press

 then  to complete the procedure.

GPS 5200 Receiver User Guide 33

4 Configuring the Receiver

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

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.

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
5–30 minutes.

1. Connect the GPS 5200 receiver to the computer. Turn on the
receiver and start the AgRemote utility.

2. In AgRemote, select Configuration / DGPS Config.

3. Set the Source Select field to WAAS.

4. Press

34 GPS 5200 Receiver User Guide

 then  to complete the procedure.

Configuring the Receiver 4

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:

Configuring the GPS 5200 receiver to operate in RTK
mode

Use the AgRemote utility to configure the GPS 5200 receiver for
operation in RTK mode. To configure the receiver:

1. Connect the GPS 5200 receiver to the computer. Turn on the
receiver and start the AgRemote utility.

2. In AgRemote, select Configuration / DGPS Config.

3. Set the Source Select field to RTK.

4. Press

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

 then to complete this part of the procedure.

input settings for that port to RtkLnk.

GPS 5200 Receiver User Guide 35

4 Configuring the Receiver

Configuring the communication ports

If the GPS 5200 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 Po r t A:

1. Connect the GPS 5200 receiver to the computer. Turn on the
receiver and start the AgRemote utility.

2. In AgRemote, select Configuration / Port A Config.

3. 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 Po r t B:

• Repeat the above steps but in Step 2 select Configuration / Port B

Config.

Configuring input/output communication

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

36 GPS 5200 Receiver User Guide

Configuring the Receiver 4

Configure the Port Input/Output communication settings for
communicating with the Autopilot system, other external hardware
devices, and software programs. Table 4.1 describes the input settings.

Table 4.1 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.

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

optional AgRemote program or 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.

The default port settings are:

Port A Port B

Baud rate In TSIP 38,400 TSIP 38,400

Out TSIP 38,400 TSIP 38,400

Data bits 88

Parity None None

Stop bits 11

Note – The AgRemote utility, when connected to an GPS 5200 receiver
receiver, automatically resets the receiver port communication settings to
8-O-1 TSIP 115 K. This enables optimal communication with an office
computer. If the receiver is to work with an Autopilot system, however, the
receiver port communication settings must be 8-N-1 TSIP 38.4 K. To work

GPS 5200 Receiver User Guide 37

4 Configuring the Receiver

åæ I RTCM 9600
8N1 0 NMEA 4800

with some other devices and software programs, the receiver port
communication settings must be 8-N-1 NMEA 4800. If AgRemote has
changed the settings, you will need to change them back manually.

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:

Setting Description

Baud rate 38,400

Data bits 8

Parity None

Stop bits 1

Changing the input or output port settings

1. From the Port A Config
screen, press

 until the

Port-A Input/Output
screen appears.

38 GPS 5200 Receiver User Guide

2. Press

3. Press

4. Press

to activate the cursor.

 or  to change the value.

.

5. Repeat Steps 3 and 4 until you have set all the required values.

6. Press

7. Press

 to save all the changes.

 to move to the next screen.

Configuring the Receiver 4

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 Filter and 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.

GPS 5200 Receiver User Guide 39

4 Configuring the Receiver

40 GPS 5200 Receiver User Guide

APPENDIX

A

Specifications A

In this appendix:

 GPS 5200 receiver

 GPS channels

 L-band satellite

differential correction
receiver

 Receiver default settings

This appendix lists the specifications of
the GPS 5200 receiver and its settings.

GPS 5200 Receiver User Guide 49

A Specifications

GPS 5200 receiver

The following table gives the physical characteristics of the GPS 5200
combined GPS/DGPS receiver and antenna:

Item Description

Size 300 mm (11.7 in) wide x 309 mm (12.05 in) deep x 70 mm (2.73 in)

high

Weight 1.9 kg

Power Nominal 350 mA at 12 V DC

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

Storage temperature –40 °C to +85 °C (–40 °F to +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

50 GPS 5200 Receiver User Guide

Specifications A

GPS channels

The following table lists the performance characteristics of GPS
channels.

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)

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

Differential position
accuracy

OmniSTAR HP speed
accuracy

OmniSTAR HP position
accuracy

Time to first fix <30 seconds, typical

Multipath mitigation EVEREST technology

0.16 kph (0.1 mph)

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

0.16 kph (0.1 mph)

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.

GPS 5200 Receiver User Guide 51

A Specifications

Item Description

Satellite differential
compatibility

NMEA messages GGA 1 1

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.

OmniSTAR, WAAS, and EGNOS

1

, GLL, GSA1, GST, GSV, GST, MSS, PTNLDG, PTNL PJK,
PTNL PJT, PTNL VGK, PTNL VHD, PTNLEV, PTNLID, PTNLSM, RMC1,
VGK, VTG1, XTE, ZDA

L-band satellite differential correction receiver

The following table lists the characteristics of the L-band satellite
differential correction receiver with OmniSTAR support.

Item Description

Bit error rate 10

Acquisition and reacquisition time <5 seconds, typical

Frequency band 1525–1559 MHz

Channel spacing 0.5 kHz

-5

for Eb/N of >5.5 dB

Receiver default settings

The following table lists the receiver default settings.

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

52 GPS 5200 Receiver User Guide

CHAPTER

5

Troubleshooting 5

In this chapter:

 Global Positioning System

(GPS)

 Interference

 GPS receiver

 AgRemote utility

 FlashLoader 200 upgrade

utility

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).

GPS 5200 Receiver User Guide 41

5 Troubleshooting

Global Positioning System (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.

GPS signals are reflecting off nearby
trees and/or metal buildings and
horizontal surfaces.

Intermittent loss of lock on
satellite

The receiver loses the satellite signal
from time to time.

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.

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).

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.

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).

Move the receiver away from the tree cover and/or
from sources of electromagnetic interference.

42 GPS 5200 Receiver User Guide

Problem Possible solution

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 (AgRemote).

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  until Stop Date appears.

If the message
OmniSTAR to reactivate your subscription. For more
information, see OmniSTAR, page 33.

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

Access Unknown appears, contact

D/3D.

Troubleshooting 5

GPS 5200 Receiver User Guide 43

5 Troubleshooting

Problem Possible solution

No GPS position output from the
receiver after connecting to
AgRemote

When the receiver is connected to
the AgRemote utility, AgRemote
automatically resets the port
communication settings on the
receiver to 8-O-1 TSIP 115 K for both
input and output. This enables
optimal communication with an
office computer.

If the receiver is to work with an
Autopilot system, however, the
receiver port communication
settings must be 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. If AgRemote has
changed the settings, you will need
to change them back manually.

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.)

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.

Connect AgRemote. Then reset the port
communication settings to NMEA output. For more
information, see Configuring the communication

ports, page 36.

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.

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

).

44 GPS 5200 Receiver User Guide

Problem Possible solution

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.

Troubleshooting 5

GPS 5200 Receiver User Guide 45

5 Troubleshooting

Interference

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.

FM 2-way radios

Transmitting FM 2-way radios can
interfere with OmniSTAR, WAAS,
and GPS signal reception.

Engine noise

An unshielded ignition system can
cause enough noise to block
reception of a differential signal.

An alternator can cause noise that
interferes with a differential signal.

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 signal­to-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.

Make sure that there is at least 1 m (3 ft) between
the FM 2-way radio antenna and the receiver.

Use resistor spark plug wires on the vehicle ignition
system.

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 AgRemote 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.

46 GPS 5200 Receiver User Guide

GPS receiver

Problem Possible solution

Mounting location

The receiver is not picking up a clear
signal.

Cables

One of the cables seems faulty.

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.

Factory defaults

You need to restore the receiver
factory defaults.

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 23).

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.

Please contact your local Trimble Reseller to get
the batteries replaced. You cannot replace the
battery yourself.

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

5. Press 4.

The factory default settings are restored. The DGPS
service subscription is not lost.

 until Ye s appears.

Troubleshooting 5

GPS 5200 Receiver User Guide 47

5 Troubleshooting

AgRemote utility

Problem Possible solution

AgRemote cannot communicate
with the receiver. All you see is a
blank screen.

1. Make sure that:

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

power source

• all cable connections between the receiver

and the computer are secure

• you are using the correct COM port

2. Turn off the receiver then turn it on again.

3. Select File / Connect.

FlashLoader 200 upgrade utility

Problem Possible solution

The FlashLoader 200 upgrade utility
cannot detect the receiver or
download the firmware.

Make sure that:

• Other programs, such as AgRemote and
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 FlashLoader 200 menu, select Settings.

2. Select the check box for a serial link.

3. At Port, select Auto. Click

4. Select the Upload firmware to receiver check
box.

5. Navigate to where the firmware file is saved and
select the file. Click

6. From the Auto Port Select dialog, select Use
receiver on port... and click

Once you have checked this, turn off the receiver
then turn it on again. Try again to connect
FlashLoader 200.

OK.

Proceed.

OK.

48 GPS 5200 Receiver User Guide

Third-Party Interface

APPENDIX

B

Requirements

In this appendix:

 Third-party software

 Third-party hardware

B

This appendix describes the interface
requirements for third-party software and
hardware.

GPS 5200 Receiver User Guide 53

B Third-Party Interface Requirements

Third-party software

The following table lists the interface requirements for connecting a
GPS 5200 receiver to third-party software.

Use cable P/N 50166, or cable P/N 30945 with cable P/N 50581, when
connecting to the third-party software products listed.

Software Company Protocol NMEA

messages

AgView GIS Solutions NMEA VTG, GLL 4800 8-N-1 1 Hz

FarmGPS Red Hen NMEA GGA, GSA, VTG 4800 8-N-1 1 Hz

Field Rover SST Dev

Group

FieldLink DOS Agris NMEA GGA, GSA, VTG 4800

FieldLink
Windows

Field Worker
Pro

HGIS Starpal NMEA GGA, RMC 4800

Instant Survey Agrilogic

Pocket Survey Agrilogic

Sitemate Farmworks NMEA GGA, VTG 4800 8-N-1 1 Hz

SMS Mobile
device

Agris NMEA GGA, GSA, VTG 4800

Field Worker NMEA GGA, GLL, RMC,

(Case-IH)

(Case-IH)

Ag Leader NMEA GGA, VTG 4800 8-N-1 1 Hz

NMEA GGA, GSA, GSV,

VTG

VTG

NMEA GGA, GSA, RMC 4800 8-N-1 1 Hz

NMEA GGA, GSA, RMC 4800 8-N-1 1 Hz

Baud Other Pos

rate

4800 8-N-1 1 Hz

8-N-1 1 Hz
or
9600

8-N-1 1 Hz
or
9600

4800
or
9600

or
9600

8-N-1 1 Hz

8-N-1 1 Hz

54 GPS 5200 Receiver User Guide

Third-party hardware

The following table lists the interface requirements for connecting a
GPS 5200 receiver to third-party hardware.

Third-Party Interface Requirements B

Hardware Company Protocol NMEA

messages

AMS Raven NMEA GGA, VTG 9600 8-N-1 1 Hz

Ag
Navigator

Aim
Navigator

Contour Position Inc. NMEA GGA 19200 8-N-1 5 Hz

Marker RDS or

Falcon Ag Chem NMEA GGA, VTG 4800 8-N-1 1 Hz

Falcon w/
Falcon
Track LBAR

Swath
Smart or
RGL 500
(LB-5 for
Raven)

LB-3, LB-4,
and LB-5

YM2000
Yield
Monitor

PF3000
Yield
Monitor

PF3000Pro
Monitor
without
internal

2

GPS

PF
Advantage

Springhill RTCM 9600 8-N-1 10 Hz

Case Tyler NMEA GGA 19200 8-N-1 5 Hz

Position Inc.

Ag Chem NMEA GGA, VTG 19200 8-N-1 10 Hz

Raven,
Starlink
manufactured

Starlink NMEA GGA, VTG

Ag Leader NMEA GGA, VTG 4800 8-N-1 1 Hz 39903

1

Ag Leader NMEA GGA, VTG 4800 8-N-1 1 Hz 39903

1

Ag Leader NMEA GGA, VTG 4800 8-N-1 1 Hz 39903

Ag Leader NMEA GGA, VTG 4800 8-N-1 1 Hz 39903

NMEA GGA 19200 8-N-1 5 Hz

NMEA GGA, VTG

or RMC

or RMC

Baud Other Pos

rate

19200 8-N-1 10 Hz

19200 8-N-1 10 Hz

Cable
P/N

50166, or
30945
plus
50581

50166, or
30945
plus
50581

plus
50581

plus
50581

plus
50581

plus
50581

GPS 5200 Receiver User Guide 55

B Third-Party Interface Requirements

Hardware Company Protocol NMEA

messages

InSight Ag Leader NMEA GGA, VTG 19200 8-N-1 5 Hz 39903

EDGE Ag Leader NMEA GGA, VTG 19200 8-N-1 5 Hz 39903

AFS Yield
Monitor

AFS Yield
Monitor

GreenStar
Yield
Monitor

New
Holland
Yield
Monitor

VCD (Vision
Display
Controller)

Swath XL Midtech NMEA GGA 19200 8-N-1 5 Hz 50166, or

Case-IH
(Ag Leader
YM2000)

Case-IH YMIU
(yield monitor
interface
unit)
manufactured
by Ag Leader
for Case-IH

John Deere NMEA GGA, GSA,

3

New Holland
(Ag Leader
PF3000)

Rockwell NMEA GGA, GLL,

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

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

RMC

NMEA GGA, VTG 4800 8-N-1 1 Hz 39903

VTG, ZDA

Baud Other Pos

rate

4800 8-N-1 1 Hz 34189

4800 8-N-1 1 Hz 50166, or

Cable
P/N

plus
50581

plus
50581

plus
50581

plus
50581

plus
50581

plus
50581

30945
plus
50581

30945
plus
50581

56 GPS 5200 Receiver User Guide

Third-Party Interface Requirements B

Hardware Company Protocol NMEA

messages

Caterpillar

Claus NMEA GGA 4800
Cebis Yield
Monitor

Baud Other Pos

rate

8-N-1 1 Hz 50166, or
or
9600

Cable
P/N

30945
plus
50581

AGCO
FieIdStar
Yield
Monitor

1

P/N 39903 replaced old Ag Leader cable P/N 30660.

2

Connect to Aux port.

3

Older GreenStars with version 5.3P mapping processor software require 9600 baud. Older GreenStars

AGCO NMEA GGA, VTG,

4

GSV, GSA

4800 8-N-1 1 Hz 39903

plus
50581

with version 5.3R mapping processor software require 4800 baud.

4

AGCO unit requires a null modem RS-232 connection. Ag Leader cable P/N 39903 is wired correctly for

connection.

GPS 5200 Receiver User Guide 57

B Third-Party Interface Requirements

58 GPS 5200 Receiver User Guide

Index

Numerics

1 PPS output 11

A

accuracy 8, 14
adapter cable 25
AFS Yield Monitor 56
Ag Navigator 55
AGCO FieldStar Yield Monitor 57
AgGPS 170 Field Computer 8, 37
AgRemote utility 31

activating OmniSTAR 33
configuring ports 36
downloading 31
for RTK mode 35
Home screen 32
no GPS position 44
troubleshooting 48
viewing and configuring settings 5
WAA S/E GNOS 34

web document 32
AgView 54
Aim Navigator 55
altitude 17
AMS 55
antenna

electrical interference 24

location of 23

mounting 24

ASCII input 10
Autopilot, connecting to 25, 28

B

battery, real-time clock 47

C

cables 10

avoiding bent 25
external device 25
pinout 28
routing 26
SiteNet radio 25
third-party hardware 55
third-party software 54

troubleshooting 47
CAN bus protocol 8, 11
casing, specification 50
Caterpillar Cebis Yield Monitor 57
centimeter-level accuracy 14
changing

battery 47

correction source 33

port setting and protocol 37
characteristics 50

GPS 5200 Receiver User Guide 59

Index

CMR

corrections for RTK 14, 37, 51
input 10

LED sequences 12
COM port 48
compliance, specification 50
components 22
configuring

RTK 35

WAAS/ EGNOS D GPS 34
connecting to external devices 25
connector ports see ports
connectors 10

specification 50
Contour 55
Controller Area Network bus protocol see

CAN bus protocol
convergence 16
coordinate systems 18
correction source, changing 33
corrections, free or subscription 15

D

data/power cable 10
default settings, receiver 52
Differential GPS (DGPS) positioning

method 15

configuring 35
if accuracy poor 42

E

EDGE 56
EGNOS

accuracy 14
DGPS, configuring 34
website 15

electrical interference, sources of 24

elevation 17
Elevation mask 42
environmental conditions for receiver 24
ephemeris (satellite history) file 17
European Geostationary Navigation Overlay

System see EGNOS
European Space Agency website 15
external devices, connecting to 25

F

factory defaults 47
Falco n 55
Falcon with Falcon Track LBAR 55
FarmGPS 54
features 8
Federal Aviation Administration website 15
Field Rover 54
Field Worker Pro 54
FieldLink DOS 54
FieldLink Windows 54
FlashLoader 200 utility, troubleshooting 48
FM 2-way radios 46
free corrections 15

G

GPS error, sources of 17
GPS Mode 42
GPS positioning methods 14
GPS positions

output format 11
output of 18

GreenStar Yield Monitor 56

60 GPS 5200 Receiver User Guide

Index

H

hardware

third-party 55
HGIS 54
Home screen

AgRemote utility 32

satellites tracked 43
horizontal accuracy 8
humidity, specifications 50

I

information, more 6, 11, 32
input, TSIP, RTCM, and ASCII 10
inputs 10
InSight 56
Instant Survey 54
ISO 11783 8

J

J1939 CAN bus 8, 11

L

latitude 17
LB-3, LB-4, LB-5 55
LED indicator 12
location of antenna 23
location of receiver 23
longitude 17

multipath

and accuracy 18
EVEREST technology 8
GPS channels 51
reducing 42

N

National Geodetic Survey website 19
National Marine Electronics Association see

NMEA
New Holland Yield Monitor 56
NMEA

output 10, 39
protocol 9
screens 39
web document 11
website 11

O

OmniSTAR

HP Differential GPS positioning

method 13, 14, 15
satellite beam 43
VBS Differential GPS positioning

method 14, 15
website 16

output 10

1 PPS 11
RTCM, TSIP, NMEA, 1 PPS 10

overview 7

M

Marker 55
mounting plate assembly 22
mounting, specification 50

P

P-clip 25
PDOP 17
PDOP Mask 42

GPS 5200 Receiver User Guide 61

Index

performance of GPS channels 51
PF Advantage 55
PF3000 Yield Monitor 55
physical characteristics 50
pinout for cables 28
Pocket Survey 54
Port A Config screen 38
Port A Input/Output screen 38
port setting and protocol, changing 37
ports 8

CAN, ISO 11783 support 11
configuring 36
covering when not in use 27
output 8
serial, CAN bus support 11
setting output rate 39

specification 50
position output formats 11, 18
positioning method

Differential GPS (DGPS) 15

OmniSTAR HP 13

RTK GPS positioning 12

Satellite Differential GPS 12
power

specification 50
protocol

CAN bus 11

NMEA 9

RTCM 9

RtkLnk 10

third-party software 54

TSIP 9

R

Radio Technical Commission for Maritime

Services see RTCM

Real-Time Kinematic (RTK) GPS positioning

method 14

accuracy 14
base station coordinates 18
configuring for 35
datum and ellipsoid 19
GPS performance 51
LEDs 12
number of satellites 17
option 22
port settings 37
radio connection 25
RtkLnk protocol 10

vertical and horizontal accuracy 8
receiving DGPS 15
release notes 6
RF3000Pro Monitor without internal GPS

third party hardware 55
RGL 500 (LB-5 for Raven) 55
routing cables 26
RS-232 8, 50, 57
RTCM

input 10

output 10

protocol 9

website 11
RTK see Real-Time Kinematic (RTK) GPS

positioning method

RtkLnk protocol 10

port input setting 37

62 GPS 5200 Receiver User Guide

Index

S

SAE International website 11
Satellite Differential GPS positioning

method 12

accuracy 14
satellite history (ephemeris) file 17
satellites, number used 17
settings 37
Signal Strength Mask 42
signal-to-noise ratio (SNR) 17, 46
Sitemate 54
SiteNet 900 radio settings 38
size, specification 50
SMS Mobile 54
software

AgRemote 31

third-party 54
specifications 49
standard features 8
subscription-based corrections 15
Swath Smart 55
Swath XL 56

initialization 44
intermittent DGPS 42
poor accuracy 42
receiver location 47
restoring defaults 47
RTK 45

TSIP

AgRemote setting change 37
input 10
output 10, 39

U

utility

AgRemote 31
FlashLoader 200 48

V

vertical accuracy 8
Vision Display Controller 56

T

technical assistance 6
third-party

hardware 55

software 54
time 17
time to output positions 47
Trimble Standard Interface Protocol see TSIP
Trimble website 5
troubleshooting

AgRemote 44

AgRemote communication 48

battery 47

cables 47

FlashLoader 200 48

W

WAA S

accuracy 14
DGPS, configuring 34

website 15
WAAS/EGNOS corrections, accuracy 14
warnings

definition 6

fuse to be provided 6, 22
websites

European Space Agency 15

Federal Aviation Administration 15

for EGNOS 15

for WAAS 15

National Geodetic Survey 19

GPS 5200 Receiver User Guide 63

Index

NMEA 11
OmniSTAR 16
RTCM 11
SAE International 11
Tri mbl e 5

WAA S 1 5
weight, specification 50
Wide Area Augmentation System see WAAS

Y

YM2000 Yield Monitor 55

64 GPS 5200 Receiver User Guide