Topcon America 050901 User Manual
GR-3
Operator’s Manual
POSITIONING SYSTEMS
GR-3
Operator’s Manual
Part Number 7010-0736
Rev A
©Copyright Topcon Positioning Systems, Inc.
June, 2006
All contents in this manual are copyrighted by Topcon. All rights reserved.
The information contained herein may not be used, accessed, copied, stored,
displayed, sold, modified, published, or distributed, or otherwise reproduced
without express written consent from Topcon.
Topcon only sells GPS products into Precision Markets.
Please go to www.topcongps.com for detailed market information.
ECO#2808
TOC
Table of Contents
Preface .................................................................. v
Terms and Conditions ...................................................... v
Manual Conventions ........................................................ viii
Chapter 1
Introduction .......................................................... 1-1
Principles of Operation .................................................... 1-2
GNSS Overview ........................................................ 1-2
Calculating Absolute Positions ........................... 1-3
Calculating Differential Positions ...................... 1-4
Essential Components for Quality Surveying .... 1-5
Conclusion .......................................................... 1-6
Receiver Overview .................................................... 1-6
Getting Acquainted .......................................................... 1-8
Batteries ..................................................................... 1-8
GR-3 Receiver ........................................................... 1-10
MINTER ............................................................. 1-11
Data and Power Ports ......................................... 1-16
External Radio Antenna Connector .................... 1-17
Connector ............................................................ 1-17
SD/MMC and SIM Card Slots ............................ 1-18
Cables ........................................................................ 1-19
Other Accessories ...................................................... 1-20
Optional Accessories ................................................. 1-22
Option Authorization File (OAF) .................................... 1-23
Chapter 2
Pre-survey Preparation ........................................ 2-1
Installing Topcon Software .............................................. 2-2
Installing PC-CDU .................................................... 2-2
Installing Modem-TPS .............................................. 2-3
Installing BTCONF ................................................... 2-4
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Table of Contents
Installing FLoader ...................................................... 2-6
Installing the Optional SD and SIM Cards ....................... 2-7
Charging the Batteries ...................................................... 2-9
Power Management .......................................................... 2-10
Powering the Receiver ..................................................... 2-14
Using the Detachable Batteries .................................. 2-14
Using an Auxiliary Power Source ............................. 2-17
Turning On/Off the Receiver ..................................... 2-19
Connecting the Receiver and a Computer ........................ 2-19
Establishing a Wireless Connection .......................... 2-20
Establishing an RS232 Cable Connection ................. 2-21
Establishing a USB Connection ................................. 2-21
Bluetooth Module Configuration ..................................... 2-22
Collecting Almanacs and Ephemerides ............................ 2-26
Chapter 3
GR-3 Configuration .............................................. 3-1
Configuring the Radio Modem ........................................ 3-3
Configuring a Spread Spectrum Radio Modem ......... 3-3
Configuring a GSM Radio Modem ........................... 3-7
Configuring the Receiver ................................................. 3-10
MINTER Configuration ................................................... 3-20
Chapter 4
GR-3 Receiver Setup and Survey ....................... 4-1
Receiver Setup .................................................................. 4-1
Step 1: Set up the Receivers ...................................... 4-1
Step 2: Measure Antenna Height ............................... 4-4
Step 3: Collect Data ................................................... 4-6
MINTER Operation .......................................................... 4-7
Static Surveying for Base Stations ................................... 4-10
Kinematic (Stop & Go) Surveying for Rover Stations .... 4-11
Real Time Kinematic Surveying ...................................... 4-12
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GR-3 Operator’s Manual
Table of Contents
Chapter 5
Receiver and File Maintenance ........................... 5-1
Downloading Files to a Computer ................................... 5-1
Downloading Files via Topcon Link ......................... 5-2
...Using Windows Explorer ................................ 5-2
...Using Topcon Link .......................................... 5-4
Downloading Files via PC-CDU ............................... 5-6
Deleting Files from the Receiver’s SD Card ................... 5-8
Managing Receiver Memory ........................................... 5-9
Managing Receiver Options ............................................ 5-10
Checking the Receiver’s OAF .................................. 5-10
Loading an OAF ........................................................ 5-12
Clearing the NVRAM ...................................................... 5-13
Using the MINTER to Clear the NVRAM ............... 5-13
Using PC-CDU to Clear the NVRAM ...................... 5-14
Changing Receiver Modes ............................................... 5-14
Entering Extended Information Mode ...................... 5-14
Sleep (Off) Mode ...................................................... 5-16
Loading New Firmware ................................................... 5-16
Loading Receiver and Power Board Firmware ......... 5-18
Chapter 6
Troubleshooting ................................................... 6-1
Check This First! ............................................................. 6-1
Troubleshooting Quick List ............................................. 6-2
Powering Problems .......................................................... 6-3
Receiver Problems ........................................................... 6-4
Bluetooth Problems ......................................................... 6-9
Modem-TPS Problems ..................................................... 6-12
TX RX LED Blink Pattern on Error Conditions ............. 6-13
Obtaining Technical Support ........................................... 6-14
Phone ......................................................................... 6-14
E-mail ........................................................................ 6-15
Website ...................................................................... 6-16
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Table of Contents
Appendix A
Specifications ...................................................... A-1
Receiver Specifications .................................................... A-2
General Details .......................................................... A-2
GPS Board Details ..................................................... A-7
Bluetooth Module Details .......................................... A-8
Internal TPS Spread Spectrum Modem Details ......... A-9
Optional GSM/GPRS Module Details ....................... A-10
Connector Specifications .................................................. A-11
Radio (Modem) RF Connector .................................. A-11
Power Connector ....................................................... A-11
Serial C-RS232 Connector ........................................ A-12
USB Connector .......................................................... A-13
Appendix B
Safety Warnings ................................................... B-1
General Warnings ............................................................. B-1
Battery Pack Warnings ..................................................... B-2
Usage Warnings ............................................................... B-3
Appendix C
Regulatory Information ....................................... C-1
FCC Compliance .............................................................. C-1
Community of Europe Compliance .................................. C-2
WEEE Directive ............................................................... C-2
Appendix D
Warranty Terms ................................................... D-1
Index
iv
GR-3 Operator’s Manual
Preface
Preface
Thank you for purchasing this Topcon product. The materials
available in this Manual (the “Manual”) have been prepared by
Topcon Positioning Systems, Inc. (“TPS”) for owners of Topcon
products, and are designed to assist owners with the use of the
receiver and its use is subject to these terms and conditions (the
“Terms and Conditions”).
NOTICE
Please read these Terms and Conditions carefully.
Terms and Conditions
USE This product is designed to be used by a professional. The user
should have a good knowledge of the safe use of the product and
implement the types of safety procedures recommended by the local
government protection agency for both private use and commercial
job sites.
COPYRIGHT All information contained in this Manual is the
intellectual property of, and copyrighted material of TPS. All rights
are reserved. You may not use, access, copy, store, display, create
derivative works of, sell, modify, publish, distribute, or allow any
third party access to, any graphics, content, information or data in this
Manual without TPS’ express written consent and may only use such
information for the care and operation of your receiver. The
information and data in this Manual are a valuable asset of TPS and
are developed by the expenditure of considerable work, time and
money, and are the result of original selection, coordination and
arrangement by TPS.
P/N 7010-0736
v
Preface
TRADEMARKS GR-3™, Topcon Tools™, Topcon Link™,
TopSURV™, Modem-TPS™, Topcon® and Topcon Positioning
Systems™ are trademarks or registered trademarks of TPS.
Windows® is a registered trademark of Microsoft Corporation. The
Bluetooth® word mark and logos are owned by Bluetooth SIG, Inc.
and any use of such marks by Topcon Positioning Systems, Inc. is
used under license. Other product and company names mentioned
herein may be trademarks of their respective owners.
DISCLAIMER OF WARRANTY EXCEPT FOR ANY
WARRANTIES IN AN APPENDIX OR A WARRANTY CARD
ACCOMPANYING THE PRODUCT, THIS MANUAL AND THE
RECEIVER ARE PROVIDED “AS-IS.” THERE ARE NO OTHER
WARRANTIES. TPS DISCLAIMS ANY IMPLIED WARRANTY
OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR
USE OR PURPOSE. TPS AND ITS DISTRIBUTORS SHALL NOT
BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR
OMISSIONS CONTAINED HEREIN; NOR FOR INCIDENTAL OR
CONSEQUENTIAL DAMAGES RESULTING FROM THE
FURNISHING, PERFORMANCE OR USE OF THIS MATERIAL
OR THE RECEIVER. SUCH DISCLAIMED DAMAGES
INCLUDE BUT ARE NOT LIMITED TO LOSS OF TIME, LOSS
OR DESTRUCTION OF DATA, LOSS OF PROFIT, SAVINGS OR
REVENUE, OR LOSS OF THE PRODUCT’S USE. IN ADDITION
TPS IS NOT RESPONSIBLE OR LIABLE FOR DAMAGES OR
COSTS INCURRED IN CONNECTION WITH OBTAINING
SUBSTITUTE PRODUCTS OR SOFTWARE, CLAIMS BY
OTHERS, INCONVENIENCE, OR ANY OTHER COSTS. IN ANY
EVENT, TPS SHALL HAVE NO LIABILITY FOR DAMAGES OR
OTHERWISE TO YOU OR ANY OTHER PERSON OR ENTITY
IN EXCESS OF THE PURCHASE PRICE FOR THE RECEIVER.
LICENSE AGREEMENT Use of any computer programs or software
supplied by TPS or downloaded from a TPS website (the “Software”)
in connection with the receiver constitutes acceptance of these Terms
and Conditions in this Manual and an agreement to abide by these
Terms and Conditions. The user is granted a personal, non-exclusive,
non-transferable license to use such Software under the terms stated
herein and in any case only with a single receiver or single computer.
vi
GR-3 Operator’s Manual
Terms and Conditions
You may not assign or transfer the Software or this license without
the express written consent of TPS. This license is effective until
terminated. You may terminate the license at any time by destroying
the Software and Manual. TPS may terminate the license if you fail to
comply with any of the Terms or Conditions. You agree to destroy the
Software and manual upon termination of your use of the receiver. All
ownership, copyright and other intellectual property rights in and to
the Software belong to TPS. If these license terms are not acceptable,
return any unused software and manual.
CONFIDENTIALITY This Manual, its contents and the Software
(collectively, the “Confidential Information”) are the confidential and
proprietary information of TPS. You agree to treat TPS’ Confidential
Information with a degree of care no less stringent that the degree of
care you would use in safeguarding your own most valuable trade
secrets. Nothing in this paragraph shall restrict you from disclosing
Confidential Information to your employees as may be necessary or
appropriate to operate or care for the receiver. Such employees must
also keep the Confidentiality Information confidential. In the event you
become legally compelled to disclose any of the Confidential
Information, you shall give TPS immediate notice so that it may seek a
protective order or other appropriate remedy.
WEBSITE; OTHER STATEMENTS No statement contained at the
TPS website (or any other website) or in any other advertisements or
TPS literature or made by an employee or independent contractor of
TPS modifies these Terms and Conditions (including the Software
license, warranty and limitation of liability).
SAFETY Improper use of the receiver can lead to injury to persons or
property and/or malfunction of the product. The receiver should only
be repaired by authorized TPS warranty service centers. Users should
review and heed the safety warnings in an Appendix.
MISCELLANEOUS The above Terms and Conditions may be
amended, modified, superseded, or canceled, at any time by TPS. The
above Terms and Conditions will be governed by, and construed in
accordance with, the laws of the State of California, without reference
to conflict of laws.
P/N 7010-0736
vii
Preface
Manual Conventions
This manual uses the following conventions:
Example Description
FileExit Click the File menu and click Exit.
Connection Indicates the name of a dialog box or screen.
Frequency Indicates a field on a dialog box or screen, or a tab
within a dialog box or screen.
Enter Press or click the button or key labeled Enter.
Further information to note about the configuration,
NOTE
TIP
maintenance, or setup of a system.
Supplementary information that can help you
configure, maintain, or set up a system.
NOTICE
CAUTION
WARNING
viii
Supplementary information that can have an affect
on system operation, system performance,
measurements, or personal safety.
Notification that an action has the potential to
adversely affect system operation, system
performance, data integrity, or personal health.
Notification that an action will result in system
damage, loss of data, loss of warranty, or personal
injury.
GR-3 Operator’s Manual
Manual Conventions
DANGER
Under no circumstances should this action be
performed.
P/N 7010-0736
ix
Preface
Notes:
x
GR-3 Operator’s Manual
Chapter 1
Introduction
The GR-3 receiver is a multi-frequency, GPS+ receiver built to be the
most advanced and compact receiver for the surveying market. The
receiver is a multi-function, multi-purpose receiver intended for
precision markets. Precision markets means markets for equipment,
subsystems, components and software for surveying, construction,
commercial mapping, civil engineering, precision agriculture and
land-based construction and agriculture machine control,
photogrammetry mapping, hydrographic and any use reasonably
related to the foregoing.
The GR-3 can receive and processes multiple signal types (including
the latest GPS L2C, GPS L5, GLONASS C/A L2, and GALILEO
signals) improving the accuracy and reliability of your survey points
and positions, especially under difficult jobsite conditions. The multifrequency and GPS+ features of the receiver combine to provide a
positioning system accurate for any survey. Several other features,
including multipath mitigation, provide under-canopy and low signal
strength reception. The receiver provides the functionality, accuracy,
availability, and integrity needed for fast and easy data collection.
P/N 7010-0736
FUNCTION
Figure 1-1. GR-3 Receiver
1-1
Introduction
Principles of Operation
Surveying with the right GPS receiver can provide users accurate and
precise positioning, a requirement for any surveying project.
This section gives an overview of existing and proposed Global
Navigation Satellite Systems (GNSS) and receiver functions to help
you understand and apply basic operating principles, allowing you to
get the most out of your receiver.
GNSS Overview
Currently, the following three global navigation satellite systems
(GNSS) offer line-of-site radio navigation and positioning, velocity,
and time services on a global, all-weather scale to any user equipped
with a GNSS tracking receiver on or near the Earth’s surface:
• GPS – the Global Positioning System maintained and operated by
the United States Department of Defense. For information on the
status of this system, visit the US Naval Observatory website
(http://tycho.usno.navy.mil/) or the US Coast Guard website
(http://www.navcen.uscg.gov/).
• GLONASS – the Global Navigation Satellite System maintained
and operated by the Russian Federation Ministry of Defense. For
information on the status of this system, visit the Coordinational
Scientific Information Center website (http://www.glonasscenter.ru/frame_e.html).
• GALILEO – an upcoming global positioning system maintained
and operated by Galileo Industries, a joint venture of several
European space agencies/companies working closely with the
European Space Agency. Unlike GPS and GLONASS, this is a
civil endeavor and is currently in the development and validation
stage. For information on the status of this system, visit the
Galileo Industries website (http://www.galileo-industries.net).
1-2
GR-3 Operator’s Manual
Principles of Operation
Despite numerous technical differences in the implementation of
these systems, satellite positioning systems have three essential
components:
• Space – GPS, GLONASS, and GALILEO satellites orbit
approximately 12,000 nautical miles above Earth and are
equipped with a clock and radio. These satellites broadcast
ranging signals and various digital information (ephemerides,
almanacs, time&frequency corrections, etc.).
• Control – Ground stations located around the Earth that monitor
the satellites and upload data, including clock corrections and
new ephemerides (satellite positions as a function of time), to
ensure the satellites transmit data properly.
• User – The community and military that use GNSS receivers to
calculate positions.
Calculating Absolute Positions
When calculating an absolute position, a stationary or moving
receiver determines its three-dimensional position with respect to the
origin of an Earth-Center Earth-Fixed coordinate system. To calculate
this position, the receiver measures the distance (called pseudoranges) between it and at least four satellites. The measured pseudoranges are corrected for clock differences (receiver and satellites) and
signal propagation delays due to atmospheric effects. The positions of
the satellites are computed from the ephemeris data transmitted to the
receiver in navigation messages. When using a single satellite system,
the minimum number of satellites needed to compute a position is
four. In a mixed satellite scenario (GPS, GLONASS, GALILEO), the
receiver must lock onto five or more satellites to account for the
different time scales used in these systems and to obtain an absolute
position.
P/N 7010-0736
1-3
Introduction
Calculating Differential Positions
DGPS, or Differential GPS, is a relative positioning technique where
the measurements from two or more remote receivers are combined
and processed using sophisticated algorithms to calculate the
receivers’ relative coordinates with high accuracy.
DGPS accommodates various implementation techniques that can be
classified according to the following criteria:
• The type of GNSS measurements used, either code-phase
differential measurements or carrier-phase differential
measurements
• If real-time or post-mission results required
Real-time applications can be further divided according to the
source of differential data and communication link used.
With DGPS in its most traditional approach, one receiver is placed at
a known, surveyed location and is referred to as the reference receiver
or base station. Another receiver is placed at an unknown location and
is referred to as the remote receiver or rover. The reference station
collects the code-phase and carrier-phase measurements from each
GNSS satellite in view.
• For real-time applications, these measurements and the reference
station coordinates are then built up to the industry standard
RTCM—or various proprietary standards established for
transmitting differential data—and broadcast to the remote
receiver(s) using a data communication link. The remote receiver
applies the transmitted measurement information to its observed
measurements of the same satellites.
• For post-mission applications, the simultaneous measurements
from reference and rover stations are normally recorded to the
receiver’s internal memory (not sent over communication link).
Later, the data are downloaded to computer, combined, and
processed.
Using this technique, the spatially correlated errors—such as
satellite orbital errors, ionospheric errors, and tropospheric
errors—can be significantly reduced, thus improving the position
solution accuracy.
1-4
GR-3 Operator’s Manual
Principles of Operation
A number of differential positioning implementations exist, including
post-processing surveying, real-time kinematic surveying, maritime
radio beacons, geostationary satellites (as with the OmniSTAR
service), and satellite based augmentation systems (WAAS, EGNOS,
MSAS).
The real-time kinematic (RTK) method is the most precise method of
real-time surveying. RTK requires at least two receivers collecting
navigation data and communication data link between the receivers.
One of the receivers is usually at a known location (Base) and the
other is at an unknown location (Rover). The Base receiver collects
carrier phase measurements, generates RTK corrections, and sends
this data to the Rover receiver. The Rover processes this transmitted
data with its own carrier phase observations to compute its relative
position with high accuracy, achieving an RTK accuracy of up to 1 cm
horizontal and 1.5 cm vertical.
Essential Components for Quality Surveying
Achieving quality position results requires the following elements:
• Accuracy – The accuracy of a position primarily depends upon
the satellite geometry (Geometric Dilution of Precision, or
GDOP) and the measurement (ranging) errors.
– Differential positioning (DGPS and RTK) strongly mitigates
atmospheric and orbital errors, and counteracts Selective
Availability (SA) signals the US Department of Defense
transmits with GPS signals.
– The more satellites in view, the stronger the signal, the lower
the DOP number, the higher positioning accuracy.
• Availability – The availability of satellites affects the calculation
of valid positions. The more visible satellites available, the more
valid and accurate the position. Natural and man-made objects
can block, interrupt, and distort signals, lowering the number of
available satellites and adversely affecting signal reception.
P/N 7010-0736
1-5
Introduction
• Integrity – Fault tolerance allows a position to have greater
integrity, increasing accuracy. Several factors combine to provide
fault tolerance, including:
– Receiver Autonomous Integrity Monitoring (RAIM) detects
faulty GNSS satellites and removes them from the position
calculation.
– Five or more visible satellites for only GPS or only
GLONASS; six or more satellites for mixed scenarios.
– Satellite Based Augmentation Systems (WAAS, EGNOS,
etc.) creates and transmit, along with DGPS corrections, data
integrity information (for example, satellite health warnings).
– Current ephemerides and almanacs.
Conclusion
This overview simply outlines the basics of satellite positioning. For
more detailed information, visit the TPS website.
Receiver Overview
When power is turned on and the receiver self-test completes, the
receiver’s 72 channels initialize and begin tracking visible satellites.
Each of the receiver’s channels can be used to track any one of the
GPS, GLONASS, or GALILEO signals. The number of channels
available allows the receiver to track all visible global positioning
satellites at any time and location.
An internal GPS+ antenna equipped with a low noise amplifier (LNA)
and the receiver’s radio frequency (RF) device are connected with a
coaxial cable. The wide-band signal received is down-converted,
filtered, digitized, and assigned to different channels. The receiver
processor controls the process of signal tracking.
Once the signal is locked in the channel, it is demodulated and
necessary signal parameters (carrier and code phases) are measured.
Also, broadcast navigation data are retrieved from the navigation
frame.
1-6
GR-3 Operator’s Manual
Principles of Operation
After the receiver locks on to four or more satellites, its absolute
position in WGS-84 and the time offset between the receiver clock
and GPS time are computed. This information and the measurement
data can be stored in the optional MMC or SD card
1
and downloaded
later onto a computer, then processed using a post-processing
software package. When the receiver operates in RTK mode, raw data
measurements can also be recorded into the receiver’s internal
memory. This allows the operator to double check real-time results
obtained in the field.
Depending on your options, capabilities of the receiver include:
• Multipath reduction
• Satellite based augmentation systems (WAAS, EGNOS, etc.)
• Adjustable phase locked loop (PLL) and delay lock loop (DLL)
parameters
• Dual- or multi-frequency modes, including static, kinematic, realtime kinematic (RTK), and differential GPS (DGPS) survey
modes (DGPS modes include static, kinematic, and RTK)
• Auto data logging
• Setting different mask angles
• Setting different survey parameters
• Static or dynamic modes
1. MMC = multi-media card; SD = secure digital
P/N 7010-0736
1-7
Introduction
Getting Acquainted
The GR-3 is a 72-channel GPS receiver with external, detachable
batteries, two data ports, an interface for controlling and viewing data
logging, external memory card slot, an internal radio modem, a
Bluetooth® wireless technology module, and an optional
GSM/GPRS module.
Batteries
The GR-3 receiver comes equipped with two detachable,
rechargeable batteries (Figure 1-2) for powering the receiver.
Figure 1-2. GR-3 Batteries
The receiver draws power from one battery at a time before switching
to the second battery. Each detachable battery can provide up to
between 4h30m and 8h30m (approximate) of operation, depending on
the mode of the receiver.
The battery charging cradle (Figure 1-3) connects to a standard
power outlet using the power adapter cable and power cable/power
supply unit. When connected to a power outlet, the batteries will be
1-8
GR-3 Operator’s Manual
Getting Acquainted
fully charged in approximately six hours. The batteries should run at
no less than 80% capacity after 500 charging cycles. These batteries
do not need to be drained before recharging.
The charger has two ports, one button, and three LEDs.
• The two ports connect the charger to either a receiver or an
external power source. The ports charge or drain the batteries
simultaneously.
• The STATUS button activates the battery LEDs.
Press STATUS to display the amount of charge for the
corresponding battery.
• The two battery LEDs display the percentage of charge in the
attached battery.
– Green: indicates greater than 85% charge.
– Orange: indicates an intermediate charge.
– Red: indicates less than 15% charge.
• The power LED lights up when the charger is connected to an
external power source; such as an electrical outlet or another
power source (12 volt battery).
Two power in/out ports
STATUS
Battery
Button
Power
Figure 1-3. Battery Charger with Batteries
Battery
The battery charger can also be attached to a tripod, belt, or RTK pole
to provide external power to the base station or rover.
P/N 7010-0736
1-9
Introduction
The AA battery shell (Figure 1-4) holds four AA batteries to provide
an easily portable backup power source for the receiver. Due to
variances in AA battery capacity, and the mode of the receiver and
type of modem, the amount of time the receiver is powered will vary.
Figure 1-4. AA Battery Shell (Open)
Do not use rechargeable AA batteries.
CAUTION
Do not use the AA battery shell when the radio
modem is in transmitter mode.
GR-3 Receiver
The GR-3 receiver’s advanced design reduces the number of cable
required for operation, allowing you to survey more reliably and
efficiently. The casing allocates space for two removable,
rechargeable batteries, SD/MMC and SIM card slots, a Bluetooth
wireless technology module, a multi-system receiver board, and a
radio modem communications board.
The GR-3 comes in one of the following configurations:
• with an FH915 Plus TX/RX/RP
1
radio modem
• with an FH915 Plus TX/RX/RP radio modem and a GSM/GPRS
module
• without a radio modem
Other features include two data ports, a power port, and a MINTER
for viewing status and controlling data input/output.
1. RP = repeater
1-10
GR-3 Operator’s Manual
Getting Acquainted
MINTER
The MINTER is the receiver’s minimum interface used to display and
control data input and output (Figure 1-5).
The battery LEDs display the power status for each battery:
• Green – indicates greater than 85% charge.
• Orange – indicates an intermediate charge.
• Red – indicates less than 15% charge.
The STAT LED displays the status of tracked satellites.
• Red blink – receiver is on, but no satellites being tracked.
• Green blink – receiver is on and tracking satellites; one blink per
tracked GPS satellite.
• Orange blink – receiver is on and tracking satellites; one blink per
tracked GLONASS satellite.
STAT
Battery
Power
Button
P/N 7010-0736
REC RX TX
FUNCTION
FUNCTION
Button
Figure 1-5. GR-3 MINTER
BT
FUNCTION
Battery
1-11
Introduction
The REC LED displays the data recording status. See “The
FUNCTION button” on page 1-13 for more information on REC
LED behavior when using the FUNCTION button.
• Green blinks – each blink indicates that data is being written to
the SD/MMC card.
• Solid Orange – indicates the receiver is changing modes.
• Orange blinks – indicates that the receiver is checking its internal
file system (after clearing the NVRAM or loading new firmware).
During this operation, the file system is not accessible for CDU
(control display unit) applications or for data recording. This
operation may require from fractions of a second to several
minutes, depending on the circumstances and the amount of
internal memory.
• Solid Red – indicates a fault condition with the receiver (no more
memory, no SD/MMC card inserted, a hardware problem, or an
improper OAF).
Table 1-2 on page 1-14 describes the REC LED status when using the
FUNCTION button.
The RX TX LED displays the status of the modem. Table 1-1
describes the LED colors and patterns for the different modems
available for the GR-3 receiver.
Table 1-1. RX TX LED Indications
• No light – modem is turned off.
• Green flashes – modem is in receiver mode.
• Solid Green – a radio link has been established; modem is
ready to receiver data.
FH915 Plus
Modem
1-12
• Solid Green plus Red flashes – modem is receiver data.
• Solid Red – modem is in transmitter mode.
• Red flashes – a fault condition has been detected. Check the
condition of the radio modem’s antenna to ensure it is
undamaged, and is connected properly and securely. Also make
sure nothing interrupts the signal.
• Red flashes plus Green flashes – modem is in command mode.
GR-3 Operator’s Manual
Getting Acquainted
Table 1-1. RX TX LED Indications (Continued)
• Solid Orange (Red and Green) – the modem is initializing.
• Green flashes – the modem is on, registered on the network,
and is waiting for incoming calls (Slave mode).
GSM/GPRS
• Solid Red – a connection has been established.
• Green flashes – the modem is in direct control mode (Daisy
Chain).
• Orange flashes – an error has occurred (initialization error,
wrong PIN code, etc.).
The BT LED indicates the level of activity at the Bluetooth wireless
technology communication link:
• Blue flashes – the Bluetooth module is on but no connection is
established.
• Solid blue light – the Bluetooth module is on and a connection
has been established.
• No light – the Bluetooth module is off.
The power button turns the receiver on and off.
The FUNCTION button switches the receiver between information
modes and post-processing modes, starts/stops data recording, and
changes the baud rate of the serial port to 9600. See “MINTER
Operation” on page 4-7 for more information. Table 1-2 on page 1-14
describes the REC LED status when using the FUNCTION button.
P/N 7010-0736
1-13
Introduction
Table 1-2. FUNCTION Button Operations and REC LED Status
FUNCTION Key REC LED Status
When data recording is off, and the FUNCTION key is...
No light No data recording.
Not pressed
Pressed for < 1
second
Pressed for 1–5
seconds
Pressed for 5–8
seconds
Pressed for > 8
seconds
Orange blink Internal file system test in progress.
Red No free memory; hardware problem with
data recording. No SD/MMC card.
If FUNCTION key mode is “LED blink mode switch”
Orange Release to change information mode.
If FUNCTION key mode is “Occupation mode switch”
Orange No function.
If FUNCTION key mode is “LED blink mode switch”
Green Release to start data recording (post-
processing occupation mode undefined).
If FUNCTION key mode is “Occupation mode switch”
Green Release to start recording (Kinematic or
Static post-processing occupation mode)
Red Release to turn serial port A baud rate to
9600 bps.
No light No function.
1-14
GR-3 Operator’s Manual
Getting Acquainted
Table 1-2. FUNCTION Button Operations and REC LED Status (Continued)
FUNCTION Key REC LED Status
When data recording is on, and the FUNCTION key is...
Red No free memory; hardware problem with
data recording.
If FUNCTION key mode is “LED blink mode switch”
Green Data recording started (post-processing
occupation mode undefined).
Not pressed
Pressed for < 1
second
Pressed for 1–5
seconds
Pressed for 5–8
seconds
Pressed for > 8
seconds
If FUNCTION key mode is Occupation mode switch
Green Data recording started (Kinematic post-
processing occupation mode).
Orange Data recording started (Static post-
processing occupation mode).
If FUNCTION key mode is “LED blink mode switch”
Orange Release to change information mode.
If FUNCTION key mode is “Occupation mode switch”
Orange Release to toggle between Static and
Kinematic post-processing modes.
No light Release to stop data recording.
Red Release to turn serial port A baud rate to
9600 bps.
No light No function (data recording still on).
P/N 7010-0736
1-15
Introduction
Data and Power Ports
The GR-3 has the following three ports (Figure 1-6):
• USB – rimmed in yellow; used for high-speed data transfer and
communication between the receiver and an external device.
The body of the connector on the corresponding cable is yellow.
• Serial – rimmed in black; used for communication between the
receiver and an external device.
The body of the connector on the corresponding cable is black.
• Power – rimmed in red; used to connect the receiver to an
external power source. This port can also be used to charge the
batteries.
The body of the connector on the corresponding cable is red.
1-16
USB
(yellow)
U
S
B
(black)
S
E
R
I
A
L
Serial
Power
(red)
P
O
W
E
R
Figure 1-6. GR-3 Ports
GR-3 Operator’s Manual
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