Ag Leader GPS 2100 Operators Manual

GPS 2000/2100

Operator’s Manual

Copyright 1998 Ag Leader Technology

GPS 2000/2100

Table of Contents

The following sections appear in this manual:

1-1

2-1

Initial Setup

2-1

Harvest

2-3

Mobile Applications

2-4

Soil Sampling

2-5

Site Verification

2-8

3-1

General

3-1

Keypad Functions

3-3

Standard Mode

3-4

Mark Key

3-5

Screen Description

3-5

On-Screen Map

3-6

Selecting a Map Scale

3-7

Calculating Area

3-9

Tape Measure Feature

3-9

Internal Memory Size

3-11

Logging Data

3-12

Making Spot Marks

3-13

Nav

Key 3-13

Navigating to a Point or a Mark

3-14

Run Key

3-15

Setup Key

3-15

Program

3-15

Send Mem

3-15

Load Mem

3-16

TSIP 3-16

Log Ext. 1 and 2

3-16

Edit Mark

3-16

Edit FLD

3-17

Edit Log

3-18

Ag Leader Technology

Table of Contents

General

Setup

Operation

Section Page

April 1998

Table of Contents

GPS 2000/2100

Setup cont.

Edit Format

3-18

NMEA Message

3-20

Sat Opt

3-21

Beac Opt

3-22

Rad Opt

3-23

Elv\Spd 3-24

Freq\Loc 3-25

Set Units

3-25

Version #

3-26

4-1

Installing the Utilities Program

4-1

Changing Data Type Names

4-2

Changing Field Names

4-3

Changing Mark Names

4-4

Saving or Loading a set of Names

4-4

Transferring Logged Data to a PC

4-5

Converting Internal Format to AL2000 or HEXASCII Formats

4-7

Creating New Data Files

4-7

Editing Data from the GPS 2000

\

2100 4-8

Separa

ting Fields

4-9

Updating the GPS 2000

\

2100 Programming

4-9

5-1

6-1

7-1

8-1

9-1

* * *

Operation cont.

Section Page

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Software

Troubleshooting

Parts List

Installation

Reference

Index

April 1998

GPS 2000/2100

General Overview

1-1

Welcome to the

Ag Leader Technology

family.

Ag Leader Tech

nology

is

We want to he

ar from you! Feel free to call any time to discuss:

We will do our best to ensure that you are happy with your current system

Ag Leader Technology

will periodically mail you a software upgrade that

Ag Leade

r Technology

will repair or replace, at no charge, any component

Warranty is not provided for damage

resulting from abuse, neglect,

Ag Leader Technology

Welcome

System Upgrades

Limited Warranty

dedicated to developing advanced, yet practical and cost-effective tools for
grain production. Above all, however, we are dedicated to meeting your
needs for support of existing products and development of product
improvements.

• Operational problems with your system

• Features you don’t like about your system

• Features you would like added to your system

and that it is upgraded in the future to better meet your needs.

replaces the existing program in your GPS 2000/2100 unit. The new
software will upgrade your unit with new features and improvements on the
current features.

To receive upgrade software and new product news, you must send in or
fax [phone]) the Registration Form that is at the beginning of the
operator’s manual. Our mailing address is:

You can also reach us at our web site: http://www.agleader.com

of the GPS 2000/2100 system that fails during normal service for which the
system is intended to be used within two years from the date of first use.

accidents, vandalism, acts of nature, or any other causes that are outside the
normal, intended use of the GPS 2000/2100 system.

Ag Leader Technology

2202 South Riverside Drive

Ames, IA 50010

April 1998

General Overview

GPS 2000/2100

1-2

Ag Leader Technology

shall not be liable for indirect, incidental, or

If you have a problem with your system call us directly at the phone number

Note:

Return failed hardware to us by UPS (preferred) or US mail.

Service

Copyright Notice

Ag Leader Technology

consequential damages to the dealer, end user, or third parties arising from
the sale, installation, or use of the GPS 2000/2100 system.

below. If we determine you have a hardware failure, we will ship
replacement hardware immediately. Our mailing address and phone
numbers are:

Ag Leader Technology

2202 South Riverside Drive

Ames, IA 50010

Phone: [phone]

Fax: [phone]

Ag Leader Technology has copyrighted (1998) the contents of this
manual and the operating program for the GPS 2000/2100 system. No
reproductions of this material may be made without first obtaining the
consent of Ag Leader Technology.

April 1998

GPS 2

000/2100

Introduction

1-3

GPS is the acronym for

G

lobal

P

ositioning

S

ystem. The GPS system

DGPS

is the acronym for

D

ifferential

GPS

. This is a correction system that

•

•

Ag Leader Technology

What is GPS?

consists of 24 orbital satellites that are used to determine positioning on
earth. GPS receiver units, such as the GPS 2000/2100, use these satellites to
provide position data as you harvest, thus helping to map your movements
in the field.

What is DGPS?

allows your position to be calculated more accurately than with only GPS
signals. DGPS signals can originate from varying sources.

One form of correction originates from Medium Frequency (MF)
radiobeacons. These beacons are located worldwide, free, and are run by the
Army Corps of Engineers and the Coast Guard in the United States. The
GPS 2000 uses the free MF radiobeacon system for its DGPS.

Another form of correction can be obtained from satellites. This correction
type requires a yearly subscription from a satellite correction provider. This
method can provide a higher degree of accuracy in some coverage areas and
allows for usage in areas not currently serviced by the MF radiobeacons.
The GPS 2100 has the ability to use either of these methods of differential
correction.

GPS 2000 Features

GPS 2100 Features

The GPS 2000 unit contains a combined twelve-channel GPS and

radiobeacon receiver board. It uses DSP, Digital Signal Processing, for
the radiobeacon signals, and it tracks two beacons at all times. Trimble
Navigation, the leading company making GPS receivers, manufactures
the receiver board.

• The system has a Trimble combined GPS/DGPS antenna.

• The unit features a graphics display and keypad.

• The unit is programmable, which means it can be updated in the future

to meet the user’s needs.

The GPS 2100 has all the features listed above for the GPS 2000.

• Has the ability to also use satellite based differential correction.

• Choice between using either Omnistar or Racal to provide the

differential correction service.

April 1998

Introduction

GPS 2000/2100

1-4

The primary difference between these units an

d others on the market is

* * *

GPS 2000/2100
Advantages over
Other Systems

Ag Leader Technology

The GPS 2000/2100 systems are submeter class receivers, which means
they can be extremely accurate under certain conditions as compared with
lower-accuracy and cost systems. This accuracy allows the GPS 2000/2100
to provide accurate speed to the Yield Monitor 2000, thus eliminating the
need for a radar gun and eliminating slip problems associated with wheel
sensors.

The units can also store data in their 128K memory, which allows the user
to take the units out in the field by themselves to mark points and
boundaries. This is tied in with the ability to navigate back to marked points
in the field, and to navigate to soil sampling sites.

The GPS 2100 adds the ability to use two different forms of differential
correction in one unit. The user can choose to use either the free MF
radiobeacons for corrections or subscribe to Omnistar or Racal satellite
services to provide differential. This allows for total flexibility should
problems arise with one source of differential or a MF radiobeacon is added
in your area.

versatility and the ability to upgrade. Instead of being a single operation and
use device the GPS 2000/2100 allow the user to put more precision into
farming.

April 1998

GPS 2000/2100

Setup

2-1

The GPS 2000/2100 syst

em can be used for various functions. This section

The following provides information on GPS 2000/2100 factory settings:

Beacon selection

The GPS 2000/2100 is set in Auto range mode. This

1

Set the unit in standard mode.

2

Press the SETUP key until BEAC OPT is

3

Press F3 again to place the unit in Manual

4

Set the desired beacon frequency.

Satellite selection

This option is available on the GPS 2100 only. If you

1

Set the unit in standard mode.

2

Press the SETUP key until SAT OPT is above

3

Press F1 to select Satellite differential.

4

OMNISTAR

covers your usage area best.

Ag Leader Technology

Overview

Initial Setup

covers a few possible applications, but it is not comprehensive because the
user may discover applications that Ag Leader Technology has not
attempted or tested.

Operation Setting

normally is acceptable, but if the user prefers to set the
receiver to a particular beacon, do the following:

Step Action

Note: Standard mode refers to the screen that

the GPS 2000/2100 starts up in after the power
has been turned on. This is the default screen.

above F3. Press F3.

mode.

Refer to section 3, Operation, for more
information about making this change.

will be using the satellite differential option then do the
following depending on which service provider you
select:

Step Action

the F2 key. Press F2.

If you will be
using….

Then …

Press the F2 key to select

Service

the SAT SOURCE: that

Apri1998

Call the OMNISTAR
subscription number

Operation

GPS 2000/2100

2-2

RACAL

Ag Leader Technology

provided and give them the
number to the right of GPS
SERIAL#. OMNISTAR
will then give the user a 24­digit code for the serial
number that was given.
Key the code in to the right
of OMNISTAR CODE:
using the arrow keys. Once
the code is entered press the
F3 key to send the code to
the GPS board inside the
unit. Now press the F4 key
to quit this screen and
return to standard mode.
Let the receiver run for at
least 30 minutes, after
which the receiver should
start receiving corrections
and display “DIFF ON”

Service

Press the F2 key to select
the SAT SOURCE: that
covers the usage area best.
Call the RACAL
subscription number
provided and give them the
number that is displayed to
the right of GPS SERIAL#.
RACAL will then activate a
code for the serial number
that was given. After the
serial number has been
called in, press the ENTER
key to return to standard
mode and wait for DIFF: to
change from OFF to ON.
Within 15-30 minutes the
receiver should start
receiving corrections from
RACAL.

April 1998

GPS 2000/2100

Setup

2-3

NMEA message

The GPS 2000/2100 has only the GGA NMEA string

Changing field,

The user can either change these names on the receiver

Follow these steps to set up the rec

eiver for harvest operation:

1 Attach the 10

-

foot coaxial cable inside the cab to the cable

2 Turn on the receiver.

3 Verify whether the yield moni

tor is receiving data from the

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Harvest

selection

data type, and
mark names

Step Action

connection on the receiver.

Important: Make sure the y-cable connecting the yield monitor
and the receiver is securely connected, and the two connectors
attached to the receiver are connected to the indicated ports.

Result: After a few seconds various types of information should
appear on the screen. After the unit becomes oriented, it will
indicate a number of satellites and whether it is receiving a
differential signal.

Note: The screen may take a few minutes to display data because
the unit must adjust to its location and acquire a good lock on
satellites and a differential source.

receiver:
a) Turn the yield monitor on.

b) Under the yield monitor SETUP key, make sure that a memory

card has been detected. See the Yield Monitor 2000 manual for
more information on setting up the yield monitor to log GPS

turned on initially. It is the only message string that the
Yield Monitor 2000 needs for position data. If the user
wants to use the GPS 2000/2100 to provide speed to
the Yield Monitor 2000 or display speed on the GPS
2000/2100 itself, then the VTG message must also be
turned on. Depending on the proposed use of the GPS
2000/2100, other messages may need to be turned on.

See section 3-21 for more information on changing the
NMEA strings that are output.

or use the GPS 2000/2100 Utilities program provided
with the system to enter the desired names.

Refer to sections 3 and 4, Operation and Software, for a
description of this process.

Apri1998

Operation

GPS 2000/2100

2-4

data.

The GPS 2000/2100 system was de

signed to provide a great deal of

In a vehicle that has a

The GPS cigarette power cable.

On an all

-

terrain vehicle

The GPS ATV/tractor power cable.

Mount the GPS 2000/2100

-

display

unit in a location that is secure and clear

Mobile
Applications

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c) Select the desired logging interval.
d) Go to the field and load into which you will be putting data.

Result: An upper-case D and G should be in the top right
corner of the screen on the yield monitor, which indicates that
you have GPS and differential signal from the receiver. You are
now ready to harvest.

Note: The marking functions can be used while harvesting, but
keep in mind that any marks made with the GPS 2000/2100 while
harvesting are not stored on the memory card. They are stored only
in the GPS 2000/2100’s memory and will not show up on the yield
map, but on a separate map downloaded from the GPS.

versatility for alternative applications. The only limitations to usage are
availability of power and a secure mount for the antenna.

The appropriate power cable for the GPS 2000/2100 depends on the type of
vehicle you are using:

If you are . . . Then use . . .

cigarette lighter,

(ATV) or tractor,

of interference from moving parts. The provided U-bracket may suit this
requirement best.

The antenna can be mounted on any metal surface, as long as the dome side
of the antenna is pointing up towards the sky. To avoid noise problems from
vehicle electrical systems, you may need to move the antenna around the
vehicle until you find a suitable location. Finding a suitable location may
require building a small stand for the antenna so that it can be placed an
acceptable distance from interference.

After the system is securely mounted and all the wires are connected, turn
the GPS 2000/2100 on.

Note: The unit may take a few minutes to orient itself and provide a lock
on satellites and a differential source, then it is ready to run.

April 1998

GPS 2000/2100

Setup

2-5

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Soil Sampling

Using the GPS 2000/2100 the user has the capability to enter sample
locations, navigate to these points, and then mark the site where the
sample was taken. To transfer data to and from the GPS 2000/2100
the user will need to install the GPS 2000 Utilities program provided
with the system. Refer to section 4, Software, to install the GPS
Utilities program and general usage instructions.

The following is a description of how to collect soil samples using the
GPS 2000/2100:

Step Action

1 Use a software program capable of griding fields to generate a

soil sample grid map.

2 Write down the LATITUDE & LONGITUDE for each point or

print out a copy of the locations. Also record the total number
of samples that will be collected in the field.

3 The user must now create a new file with the desired sample

points in it. Follow the steps starting on 4-8 to create and save
this file. The file created must be saved in the HEXASCII
format before it can be transferred into the GPS 2000/2100.

4 From the main window of the GPS Utilities program, click on

the MEMORY button. Click on the TRANSFER TO GPS
button. Select the file that was modified with the sample points
and click OK. Follow the on screen instructions and place the
GPS unit in LOAD MEM mode. The progress indicator in the
lower right-hand corner of the screen will indicate that data is
being transferred to the GPS unit.

5 The program will now prompt the user to put the GPS unit

back into LOAD MEM mode to complete the transfer. Once
the unit is in the correct mode click OK. When completed the
GPS unit will return to standard mode.

6 On the GPS 2000/2100, press the MARK key. Using the arrow

keys select a field that contains sample data. The screen should
indicate the number of points that you entered. Press the
SETUP key once and then press the F2 key to select the
RESCALE function. A map of the points that were entered for
the field should now be visible on the screen. Press SETUP
again and press F4 to QUIT and return back to mark mode. The

Apri1998

Operation

GPS 2000/2100

2-6

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map should still be visible.

7 Return to standard mode by pressing the RUN key and then

press the NAV key. Once again select a field that sample data
was entered for. The latitude and longitude that were entered
for the first sample site should now be shown on the screen.

8 The GPS 2000/2100 now has the locations of the sample sites

loaded into memory and is now ready to guide the user to the
indicated sample sites and record the location that the samples
are taken at.

9 Refer to the instructions on Mobile Applications, section 2-4,

to setup the GPS 2000/2100 for usage on a vehicle.

10 Once the user has the unit mounted and is ready to head for the

first sample point put the unit in navigation mode by pressing
the NAV button.

11 Select the field that contains the sample sites and the distance

in two directions should be displayed. These distances refer to
the direction and distance that the user must travel to reach the
indicated location.

12 Once the point is reached, stop the vehicle and press the RUN

key to get back to standard mode.

13 The user has several options for recording the current location

of the samples:

Names each MARK (up to 32)

as a different sample point.

If the user… Then

From the standard mode, use
the UP and DOWN arrow
keys to scroll through the
marks until the user sees the
desired spot mark. Press the F
key below the mark name to
log that point. The GPS unit
will now go into mark mode
and make one mark. Press the
RUN key to return to standard
mode then the Nav key to
continue to the next point.

Names each FIELD, (up to

255), as a different sample
point.

From standard mode, press the
MARK key and then select
the field for logging. Turn
logging on and off manually
by moving the cursor to LOG
and then use the UP or

April 1998

GPS 2000/2100

Setup

2-7

Ag Leader Technology

DOWN arrows to turn logging
ON and OFF. Or use a mark
above the F keys to log one
point to the field. Press the
Run key and then the Nav key
to continue to the next point.
Now change to the next field
to represent the next sample
point.

14 Repeat steps 11-13 for each point until all the samples have

been collected.

The following steps describe an alternate method for taking soil

samples using the GPS 2000/2100:

Step Action

1 Use a software program capable of generating grid maps to

create soil sample sites.

2 Write each sample location down or print off a copy of the

latitude and longitudes.

3 Turn the GPS 2000/2100 on and place it in standard mode.

Press the MARK key.

4 Select a field that will not be used to log any other points in

when the sample locations are recorded. Press one of the F
keys to make a mark. Return the GPS to standard mode by
pressing the RUN key.

NOTE: The GPS unit must have data in it to be able to
manually put coordinates in for navigation, thus the need for
this step.

5 Go to the field where the samples will be collected. From the

standard mode of the GPS 2000/2100, press the NAV key.

6 Press the F1 key. A cursor should now be flashing on the first

number of the LAT: value.

7 Use the arrow keys to move the cursor to the right and adjusts

the values. As the user changes the values and the desired
number is entered, the directional headings and distance to the
point should update and indicate which direction and distance
the user must travel to reach the sample site entered.

8 Once the user reaches a sample site follow steps 12-14 of the

previous instructions.

Apri1998

Operation

GPS 2000/2100

2-8

For site verification, the unit most likely will be mounted on a tractor. If this

The following steps represent the recommended method to operate the unit

1 Place the GPS 2000/2100 in MARK mode by pressing the MARK

2 Use the directional

arrow keys to select the field that data will be

3 The user must now decide how they will differentiate the data that

4 Now select a logging interval (INT

:)

which is located on the MARK

5 After all the names have been entered and the field that data will be

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9 After the site is marked return to navigation mode and enter the

next site to navigate to. Navigation mode will continue to only
allow the user to enter in manual location values until the user
presses the enter key.

10 Repeat steps 7-9 until all the sample sites have been logged.

Site Verification

is the case, the GPS 2000/2100 can be powered with the supplied GPS
ATV/tractor power cable or the GPS cigarette lighter cable.

for site verification:

Step Action

key.

logged in. If a field name has not been entered the user has the
option to manually key the name in by going to EDIT FLD which
can be found from the standard mode using the setup key. Or the
user can use the GPS Utilities program to enter in custom names
(refer to 4-3). If the user wants to change the data type to be used
they must create or edit the name using the Utilities program and
then select that data type for the desired field using the EDIT FLD
option.

will be collected in the field. It is recommended to use the available
32 marks to distinguish differences in a field. An example would be
to name the marks on the basis of the different hybrids that will be
planted.

screen. Use the directional arrow keys to select a logging interval
that will provide enough memory to complete a desired amount of
work. NOTE: If you use a logging interval greater than 3 you will
need edit it back to 1, 2 or 3 sec. using Excel

logged in is selected, the user has two options for logging.

• Set LOG: to ON by moving the cursor to LOG and use the up,

down arrow keys to turn logging on and off. Then activate
either spot or continuous marks as needed.

Or

• Activate a continuous mark and also use spot marks.

April 1998

GPS 2000/2100

Setup

2-9

For more information on editing names and logging data se

e sections 3 and

Another possible configuration is to use the Yield Monitor 2000 to collect

* * *

Ag Leader Technology

Note: To activate a continuous mark press the MARK key followed
by the appropriate mark.
To activate a spot mark, press the appropriate F key

Either method is valid but the first option will provide maps with
greater detail and less gaps.

Collecting Site
Verification Data on
a Memory Card

4, Operation and Software.

the site verification data on a memory card, which allows the user to name
fields and loads like the Yield Monitor does during harvest. Follow the
setup steps above under Collecting Data, but note that the GPS 2000/2100 is
not used to log the data. Refer to the Yield Monitor 2000 manual for more
instructions on this procedure.

Apri1998

GPS 2000/2100

Operation

3-1

This section of the manual will be updated as new features are added to the

The GPS 2000/2100 system utilizes the latest technology for use in

The display is a graphics display, which means that it can display images

Ag Leader Technology

Important Notice

unit, and current features are revised. When you receive your software
updates, you also will receive new sections or pages for your manual that
will explain the new features and updates.

General Description

agriculture for GPS and DGPS. The front cover of the receiver has a 13­button keypad, a power switch, and a graphics display. The unit also has
three 9-pin ports that provide power, GPS message information, secondary
differential source access, and allow for the transfer of data to and from the
GPS 2000/2100.

Display and Keypad

and characters. The keypad has 13 buttons, most of which are flexible in
function for future upgrades.

Apri1998

Operation

GPS 2000/2100

3-2

The unit is turned on and off with the rocker switch in the upper right corner

The unit has three 9

-

pin serial ports.

The antenna is a combined antenna, hous

ing the GPS and DGPS antennas.

A magnetic base attached to the bottom of the antenna housing provides

Power Switch

Serial Ports

Antenna

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of the keypad (POWER).

Note: Always turn the GPS 2000/2100 unit off when you leave it in the cab
because the unit draws power from the Yield Monitor 2000, even when the
yield monitor is off. If the GPS 2000/2100 is left on, the unit could run
down the vehicle battery.

• The right port, labeled POWER, provides power to the unit and access

to a secondary differential system.

• The middle port, labeled GPS, sends NMEA messages to the Yield

Monitor 2000 or to an external data logger.

• The left port, labeled PC, provides access to the unit for updating,

troubleshooting, and data logging.

easy mounting on metal surfaces. The magnetic base also breaks away if
any object strikes the antenna. The antenna is mounted to a combine with
the provided L-bracket (shown in the photo above).

April 1998

GPS 2000/2100

Operation

3-3

The MARK

key activates the marking mode and screen. In this mode, the

The NAV key activates the navigation mode and screen.

In this

mode, the

The RUN key

is used to ret

urn the user to standard mode, unless otherwise

Pressing SETUP

allows

you to scroll through various operating and

You use F1, F2, F3, and F4

to select the current option or selection that is

The directional keys

allow the user to change or edit values and activate

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Keypad Functions

The following information pertains to the functions of the keys on the GPS
2000/2100 keypad.

user can log data internally in the GPS 2000/2100 and mark locations on the
basis of a field name/number and a data type.

user has the option of selecting a location based on each individual point
logged, or the user can scroll through the marks made in that field and then
navigate back to the point.

specified by other “on screen” instructions.

configuration options in standard and Mark modes. The setup options are
displayed above the F keys. It also has specialized functions that, when
applicable, are explained on the screen.

displayed above these keys on the screen.

, ,

,

certain functions on the screen. Use the left and right keys to move the
cursor from one editable/changeable location to another. Use the up and
down keys to change a value or activate a function that the cursor is on. The
ENTER key is configured for multiple uses, and its current use is displayed
on the screen if it has a function.

Apri1998

Operation

GPS 2000/2100

3-4

The standard mode is the mode in which the GPS 2000/2100 starts when

Screen Description

The following is a photo of the standard mode display. An explanation of

TIME

LAT Current latitude of the receiver in degrees

-

minutes.fractional

LON Current longitude of the receiver in degrees

-

ELV or

Current elevation of the receiver in feet or current speed

#SAT

Indicates the number of satellites that the unit is using. The

DIFF

Indicates ON or OFF, telling the

user whether a differential

SNR Signal

-to-

noise ratio indicates the strength of the correction

FREQ or

Indic

ates the frequency of the differential source that the GPS

STATUS

Indicates whether one of the external logging formats is

MARKXX

Four marks are displayed on the bottom of the sc

reen. The

Standard Mode

Ag Leader Technology

turned on. It provides basic position and receiver information.

the display and the information it provides follows.

Field Description

GPS timeGreenwich Mean Time, the current time in
Greenwich, England.

minutes.

minutes.fractional minutes.

SPD

displayed in MPH.

unit can track a maximum of twelve satellites.

signal is being used.

signal in relation to the amount of background noise that can
interfere with signal reception. A good SNR is 10-18.

LOC

2000/2100 is using or the location of the differential source.

turned on.

user can change the marks displayed by using the up and
down arrow keys. The user can select from 32 possible marks.

April 1998

GPS 2000/2100

Operation

3-5

Pressing this key allows the user to log point and marker data to the internal

1 The user selects a field to log the data in and a data type to log it as.

2 The user can then select a logging interval, ranging from 1 to 20

3 Marks can also be logged, either with normal logging or just as

Screen Description

The following is a photo of the MARK screen. An explanation of the

Ag Leader Technology

General Information

The time displayed is the time at the Prime Meridian. This time is useful
mainly because the updating time indicates that the receiver is receiving
new information.

The format for latitude and longitude readings is ddmm.mmmm. This
reading will be different from that of the Yield Monitor 2000 because the
yield monitor displays the values in a different format, which is dd.dddddd.
(d=degrees, m=minutes). The PF3000 however, will use the same format as
the GPS 2000/2100.

To maintain differential correction, the unit must receive a minimum SNR
of 6.0 for radiobeacon differential. On average, the unit will run between 10
and 18 SNR, depending on your location in relation to a beacon. For
satellite differential an SNR of 4.0 must be received. An acceptable range is
6 – 10.

Mark Key

memory as follows:

Step Action

There are 256 possible fields and 20 data types, all of which can be
edited.

seconds.

individual or continuous marks. There are 32 possible mark
selections, which also can be edited.

display and the information it provides follows.

Apri1998

Operation

GPS 2000/2100

3-6

F000:XX

The field number and name the user selects in which to log

Boundary

Data type that the data will log as. Can be edited using the

LAT:

Current latitude in ddmm.mmmm.

LON:

Current longitude in ddmm.mmmm.

ELV:

Current elevation in feet.

SPD: Current speed in mph.

MRK:

Displays the mark that is being marked continuously if a

LOG:

Displays whether logging is turned on or off.

PT#: Displays the number of points that have been collected in a

INT: Displays the selected logging interval.

HML:

Hours and minutes left. This indicates the amount of time left

Mark01

One of four current marks that the user can select by pressing

DIFF:

This tells you whether you are receiving a differential

This function allows the user to see the lines and boundaries that they have

1 From the standard mode press the Ma

rk key, this will put you

2 Select the field that has known data points logged into it.

3 Press the setup key.

4 Press F1 to turn the map on.

5 Press the setup key.

6 Press the area key to display the acres in the boundary.

Ag Leader Technology

Description

data. This can be edited using the EDIT FLD option.

EDIT FLD option.

continuous mark is selected.

field.

in the interval memory to log points on the current logging
interval.

the corresponding F key below the mark name.

On-Screen Map

correction signal. It will be either ON or OFF

created. It also allows a person to display the number of acres in a
boundary.

Step Action

into the Mark mode.

April 1998

GPS 2000/2100

Operation

3-7

The following is a photo of the mark mode screen with the map option

MAP:ON

Displays the current status of the mapping option. The

RESCALE

Adjusts the scale of the map to provide a best

fit of the

CLEAR MAP

Erases the map that is being currently viewed from the

SET SCALE

Allows the user to select the type of scaling to be used for

Selecting a Map Scale

To create a point map on the GPS 2000/2100 the user must select an

Ag Leader Technology

On-Screen Map

activated. This is activated by pressing the setup key while in the mark
mode and then toggling the map on or off with the F1 key. The information
following the photo describes the setup options for generating the on screen
map.

Menu Option

Description

default setting is OFF.

logged data on the screen.

screen.

the map. The user has the following options: Span,
Rescale, Boundary, and Location.

appropriate scale so that the map generated on the screen will be viewable at
all times. To do this the user must select a scale using the available options.
The following photo is of the SETUP SCALE screen:

From the MODE line the user can select one of the following choices to

Apri1998