C-Nav 2050 User manual
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2050 User Guide
Table of Contents
Notices ii
COCOM Limits .............................................................................................................iv
Contact Information .......................................................................................................v
Chapter 1 Introduction 1
System Overview ......................................................................................................... 1
Applications.................................................................................................................. 4
Unique Features........................................................................................................... 4
Chapter 2 Interfacing 7
Electrical Power............................................................................................................ 7
Communication Ports ................................................................................................... 8
Indicator Panel ........................................................................................................... 10
1 PPS ......................................................................................................................... 12
CAN Bus/Event .......................................................................................................... 13
Chapter 3 Installation 15
Tri-Mode Antenna....................................................................................................... 15
GPS Sensor ............................................................................................................... 16
Communication Ports ................................................................................................. 17
GPS Antenna Connector............................................................................................ 18
Chapter 4 Configuration 19
Factory Default Settings ............................................................................................. 19
Advanced Configuration Settings ............................................................................... 20
Chapter 5 Safety Instructions 21
FCC Notice................................................................................................................. 21
Transport.................................................................................................................... 21
Maintenance............................................................................................................... 21
External Power Source............................................................................................... 21
Safety First ................................................................................................................. 22
Appendix A: GPS Sensor Technical Specifications 23
2050G and 2050M...................................................................................................... 23
LED Display Functions (Default) ................................................................................ 25
Appendix B: GPS Antenna Technical Specifications 27
L1+L, L2 GPS Antenna ............................................................................................ 27
Appendix C: Global corrected GPS (GcGPS) 29
Description ................................................................................................................. 29
How to Access the C-Nav®/ StarFireService......................................................... 32
Appendix D: NMEA Data Output Message Formats 37
D.1 ALM NMEA Sentence..................................................................................... 40
D.2 GGA NMEA Sentence .................................................................................... 41
D.3 GLL NMEA Sentence ..................................................................................... 43
D.4 GSA NMEA Sentence .................................................................................... 44
D.5 GST NMEA Sentence..................................................................................... 45
D.6 RMC NMEA Sentence.................................................................................... 47
D.7 VTG NMEA Sentence..................................................................................... 48
D.8 ZDA NMEA Sentence..................................................................................... 49
Appendix E: StarFire L-Band Correction Signal Selection 51
Appendix F: How to Log RAW GPS ‘binary’ data from a C-Nav[2050] unit 53
Glossary 61
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2050 User Guide
Notices
2050 GPS Products User Guide C&C P/N 5250001
Revision e August 2004
Serial Number:
Date Delivered:
Copyright
2004 by NavCom Technology, Inc. and C&C Technologies, Inc.
All rights reserved. No part of this work or the computer programs described herein may be
reproduced or stored or transmitted by any means, without the written permission of the copyright
holders. Translation in any language is prohibited without the permission of the copyright holders.
Trademarks
The ‘find your way’, ‘NavCom Globe’ and NAVCOM TECHNOLOGY logos are trademarks of
NavCom Technology, Inc.
StarFireis a registered trademark of Deere & Company. All other product and brand names are
trademarks or registered trademarks of their respective holders.
C-Nav®is a registered product of C&C Technologies, Inc.
FCC Notice
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause
undesired operation.
User Notice
NAVCOM / C&C. SHALL NOT BE RESPONSIBLE FOR ANY INACCURACIES, ERRORS, OR
OMISSIONS IN INFORMATION CONTAINED HEREIN, INCLUDING, BUT NOT LIMITED TO,
INFORMATION OBTAINED FROM THIRD PARTY SOURCES, SUCH AS PUBLICATIONS OF
OTHER COMPANIES, THE PRESS, OR COMPETITIVE DATA ORGANIZATIONS.
THIS PUBLICATION IS MADE AVAILABLE ON AN “AS IS” BASIS AND NAVCOM / C&C.
SPECIFICALLY DISCLAIMS ALL ASSOCIATED WARRANTIES, WHETHER EXPRESS OR
IMPLIED. IN NO EVENT WILL NAVCOM / C&C BE LIABLE FOR DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE USE OF OR
RELIANCE ON THE MATERIAL CONTAINED IN THIS PUBLICATION, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. NAVCOM / C&C RESERVES THE RIGHT TO MAKE
IMPROVEMENTS OR CHANGES TO THIS PUBLICATION AND THE PRODUCTS AND
SERVICES HEREIN DESCRIBED AT ANY TIME, WITHOUT NOTICE OR OBLIGATION.
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2050 User Guide
Limited Warranty
NAVCOM / C&C. warrants that its products will be free from defects in workmanship at the
time of delivery. Under this limited warranty parts found to be defective or defects in
workmanship will be repaired or replaced at the discretion of NavCom Technology, Inc., at
no cost to the Buyer, provided that the Buyer returns the defective product to NavCom
Technology, Inc. in the original supplied packaging and pays all transportation charges,
duties, and taxes associated with the return of the product. Parts replaced during the
warranty period do not extend the period of the basic limited warranty.
This provision does not extend to any NavCom Technology, Inc. products, which have been
subjected to misuse, accident or improper installation, maintenance or application, nor does
it extend to products repaired or altered outside the NavCom Technology, Inc. production
facility unless authorized in writing by NavCom Technology, Inc.
THIS PROVISION IS EXPRESSLY ACCEPTED BY THE BUYER IN LIEU OF ANY OR ALL
OTHER AGREEMENTS, STATEMENTS OR REPRESENTATIONS, EXPRESSED OR
IMPLIED, IN FACT OR IN LAW, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND OF ALL
DUTIES OR LIABILITIES OF NAVCOM TECHNOLOGY, INC. TO THE BUYER ARISING
OUT OF THE USE OF THE GOODS, AND NO AGREEMENT OR UNDERSTANDING
VARYING OR EXTENDING THE SAME WILL BE BINDING UPON NAVCOM
TECHNOLOGY, INC. UNLESS IN WRITING, SIGNED BY A DULY-AUTHORIZED
OFFICER OF NAVCOM / C&C
This limited warranty period is one (1) year from date of purchase.
See service agreement for specific warranty information.
StarFireLicensing
The StarFiresignal requires a subscription that must be purchased in order to access the service.
Licenses are non-transferable, and are subject to the terms of the C-Nav[2050] Signal Subscription /
StarFire Signal License agreement.
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2050 User Guide
Global Positioning System
Selective availability (S/A code) was disabled on 2nd May 2000 at 04:05 UTC. The United
States government has stated that present GPS users do so at their own risk. The US
Government may at any time end or change operation of these satellites without warning.
The U.S. Department of Commerce Limits
Requirements state that all exportable GPS products contain performance limitations so that
they cannot be used to threaten the security of the United States.
Access to satellite measurements and navigation results will be limited from display and
recordable output when predetermined values of velocity and altitude are exceeded. These
threshold values are far in excess of the normal and expected operational parameters of the
2050 GPS Sensor.
COCOM Limits
The U.S. Department of Commerce requires that all exportable GPS products contain
performance limitations so that they cannot be used in a manner that could threaten the
security of the United States. The following limitations are implemented on the C-Nav[2050]
GPS Receiver.
Immediate access to satellite measurements and navigation results is disabled when the
receiver’s velocity is computed to be greater than 1000 knots (515 meters per second), or its
altitude is computed to be above 18,000 meters. The receiver continuously resets until the
COCOM situation is cleared.
Use of this Document
This User Guide is intended to be used by someone familiar with the concepts of GPS and
satellite surveying equipment.
Note indicates additional information to make better use of the product
aIndicates a caution, care, and/or safety situation
Warning indicates potentially harmful situations
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2050 User Guide
Contact Information
If you have a problem and cannot find the information you need during installation or operation of the
C-Nav GPS System product or documentation, contact C&C Technologies, Inc. C-Nav Support
Group. The contact information is as follows:-
Phone: (+1) 337-261-0660 USA (24/7 support)
Fax: (+1) 337-261-0192 USA
Phones are answered 24 hours, 7 days a week, with on-call technical support engineers available
(at short notice).
Email: [email protected]
WEB: http://www.cctechnol.com/cnav - C-Nav Support/GPS Services Group
Note – C-Nav Support's technical group ‘standard’ work hours are 7am to 5pm, Monday through Friday
Central USA Standard Time for immediate contact in the USA. In addition, our regional offices can provide
first line support for the C-Nav GPS System.
To expedite the support process, please have following information available:
1. The product type and model number(s)
2. The Serial number(s)
3. The software or firmware version number(s)
4. The LAT/LON position of operation
5. Your specific question or problem.
Please detail background information, such as the configuration of your system, the actual receiver
parameters of operation, and the exact type, make, and configuration of your computer and
navigation software in use.
If you have received error messages, please specify the exact wording.
If you need to send a data file along with your inquiry, please compress the file using PKZIP or
WINZIP Software and name the file with the extension .ZIP.
Use one of the following methods to send the data file:
must be less than 2Mbyte in size in order for them to be received via the C&C Technologies,
Inc. mail-server.
• Place the file on an open FTP site and include the 'link' to the filename in your email (or
telephone) inquiry so that C-Nav Support can retrieve the file(s).
In the event that your equipment requires service, we recommend that you contact either your
regional agent or C&C Technologies, Inc., GPS Services Group to obtain a Return Material
Authorization (RMA) number before returning any items or product. You do need to provide a fault
or failure description before C&C Technologies, Inc., will issue an RMA number that must be used to
identify and track all returned equipment.
Note – Please see the Frequently Asked Questions (FAQ) on our WEB Site (ie;
http://www.cctechnol.com/cnav_faq.php )
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2050 User Guide
Chapter 1 Introduction
The 2050 GPS sensor delivers unmatched accuracy to the precise positioning community who
need a cost-effective, high performance GPS sensor. These unique receivers use the StarFire
Network, NavCom’s worldwide Differential GPS system, for instant decimeter level position
accuracy, virtually anywhere in the world, anytime.
System Overview
GPS Sensor
The 2050 sensor consists of a 10-channel dual frequency precision GPS sensor with two
additional channels for receiving Satellite Based Augmentation System (SBAS) signals and
an L-Band demodulator for reception of C-Nav StarFireNetwork correction service, for
decimeter-level position accuracy, anywhere in the world, anytime. The sensor can output
proprietary raw data as fast as 50Hz (optional) and Position Velocity Time (PVT) data as
fast as 25Hz (optional) through two 115kbps serial ports. The 2050 model sensors deliver
unmatched positioning accuracy to system integrators needing a cost-effective, high
performance differential GPS sensor.
The 2050 has a built-in L-Band demodulator for reception of C-Nav StarFireNetwork
correction service giving an immediate solution for the user utilizing the global Real-Time
Gypsy (RTG) and regional Wide area Correction Transform (WCT) solutions. Additionally,
the unit can accept corrections for DGPS, WAAS/EGNOS, assuring seamless position
output.
The 2050G is packaged for mobility. It can be used for Geographical Information System
(GIS),aerial and hydrographic surveying, and post-processed dual-frequency surveys. The
GPS sensor can be carried in a backpack with the antenna either pole-mounted from the
backpack or on a survey pole with a single cable connection.
The 2050M is ideal for vehicle mounting to suit a wide variety of machine guidance and
control applications in agriculture, mining, aerial, and hydrographic surveying. It is equipped
with additional features allowing interconnectivity with a wide variety of antennas, vehicle
data busses and other instrumentation to suit specific applications and configurations. The
2050M also has a 1PPS output port and a combined Event/CAN Bus interface port.
Both 2050 models can output proprietary raw data as fast as 50Hz (optional) and Position
Velocity Time (PVT) data as fast as 25Hz (optional) through two 115kbps serial ports with
less than 20ms latency. The horizontal accuracy of 1 cm or better and the vertical accuracy
of 2 cm or better are maintained as each output is independently calculated based on an
actual GPS position measurement, as opposed to an extrapolation between 1Hz
measurements.
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2050 User Guide
Integrated GPS and Inmarsat Band Antenna
The all-in-one housing incorporates our compact GPS antenna with excellent tracking
performance and a stable phase center for GPS L1 and L2. The robust housing assembly
features a standard 5/8” BSW thread for mounting directly to a surveyor’s pole, tripod, or
mast and is certified to 70,000 feet.
Note – Although rated to 70K feet, the ‘standard’ survey antenna is not designed for aircraft installations.
Controller
The 2050 GPS sensor is designed for use with an external Controller Solution connected
via one of the two COM ports (normally Com2 – Port B).
This may be accomplished using an IBM compatible PC, Tablet PC or Personal Digital
Assistant (PDA) and a software program which implements the rich NCT control language
defined for 2050 GPS products - see the User’s Guide of your Controller Solution for further
information.
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2050 User Guide
Included Items
2050 GPS Sensor either (2050G C&C P/N 025G001-0)
or (2050M C&C P/N 025M001-0)
Compact L1/L2 Tri-Mode GPS Antenna (C&C P/N 8250001-0)
12 ft GPS Antenna Cable (C&C P/N 4250001-12)
LEMO 4-Pin External Power Cable (C&C P/N 4250005-10)
LEMO 7 Pin to DB9S Data Communications Cable (C&C P/N 4250003-6)
Dual Data Interface Cable [Not Shown] (C&C P/N 4250004-0)
CD-Rom (C&C P/N 6250001-xx) containing User Guide, software utilities (STARUTIL) etc...
2050 User’s Guide - Hard Copy {Not Shown} (C&C P/N 5250001-xx)
Ruggedized Travel Case {Not Shown} (C&C P/N 3250004-0)
Figure 1: 2050 Supplied Equipment
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2050 User Guide
Applications
The 2050 GPS sensors meet the needs of a large number of applications including, but not
limited to:
Land Survey / GIS
Asset Location
Hydrographic Survey
Photogrammetric Survey
Machine Control
Railway, Ship and Aircraft Precise Location
Unique Features
The 2050 GPS sensor has many unique features:
C-Nav StarFire[Subscription Required]
The ability to receive the C-Nav StarFirecorrection service is fully integrated within each
unit. No additional equipment is required. A single set of Real-Time Gypsy (RTG)
corrections can be used globally enabling a user to achieve decimeter level positioning
accuracy without the need to deploy a separate base station. Thus saving time and capital
expenditure.
Regional Wide area Correction Transform (WCT) is also available from the StarFire
correction service where applicable.
Positioning Flexibility
The 2050 is capable of using two internal Satellite Based Augmentation System (SBAS)
channels that provide Wide Area Augmentation System (WAAS) or European
Geostationary Navigation Overlay Service (EGNOS) code corrections. The 2050 self
configures itself to use the most suitable correction source available and changes as the
survey dictates.
Data Sampling
GPS L1 and L2 raw data is 1 to 5 Hz in the standard configuration, and as an optional
upgrade as fast as 10, 25, and 50Hz via either of the two serial ports. The PVT (Position,
Time, & Velocity) data is also 1 to 5 Hz in the standard configuration, and as an optional
upgrade as fast as 10, and 25Hz for high dynamic applications.
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2050 User Guide
GPS Performance
The NCT-2000D GPS engine at the heart of the 2050 incorporates several patented
innovations. The receiver provides more than 50% signal to noise ratio advantage over
competing technologies. The benefit to the user is improved real time positioning.
Independent tests have proven the NCT-2000D to be the best receiver when facing various
multipath environments.
Rugged Design
The rugged design of the 2050 system components provides protection against the harsh
environments common to areas such as construction sites, offshore vessels and mines.
Units have been tested to conform to MIL-STD-810F for low pressure, solar radiation, rain,
humidity, salt fog, sand, and dust.
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2050 User Guide
Chapter 2 Interfacing
This chapter details the 2050 GPS sensor connectors and status display. Appropriate sources of
electrical power, and how to interface the communication ports.
Electrical Power
The electrical power input comprises a 4-pin LEMO female connector located on the bottom
front panel of the 2050, and is labeled ‘DC PWR’ as shown in Figure 2. The pin
designations of this connector are shown in Table 1; see Figure 2 for pin rotation on unit.
Pin Description
1 Return
2 Return
3 Power Input 10 to 30 VDC
4 Power Input 10 to 30 VDC
Table 1: External Power Cable Pin-Out
Note – Pins 1 and 2 are connected together inside the 2050 GPS sensor. Pins 3 and 4 are connected
together inside the GPS sensor.
C&C P/N 4250005-10 is a 3m (10ft) unterminated power cable fitted with a LEMO plug type
(Mfr. P/N FGG.1K.304.CLAC50Z) and red strain relief, is suitable for supplying power to the
2050 GPS sensor. This cable is supplied with the 2050 series of GPS sensors.
The GPS sensor is protected from reverse polarity by an inline diode. It will operate on any
DC voltage between 10 and 30 VDC, which is capable of supplying the required current.
The 2050 GPS receiver typically uses:
0.87 Amps at 12VDC (10.4 Watts)
0.45 Amps at 24VDC (10.8 Watts)
0.38 Amps at 30VDC (11.4 Watts)
Note – When using an external power cable longer than 5m(15ft), it is recommended that positive voltage DC
be supplied on both pins 3 and 4, and return on both pins 1 and 2.
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2050 User Guide
Note – Voltages less than 10VDC will shut the unit down. When power is restored, the ON switch will need to
be held down for more than 3 seconds.
Voltages in excess of 30VDC will damage the unit. It is extremely important to ensure that the power
supply is well conditioned with surge protection. This is especially true for vehicular electrical
systems, which can create voltage spikes far in excess of 30VDC.
Communication Ports
The 2050 GPS sensor is fitted with two 7-pin female LEMO connector communication ports
located at the bottom front of the GPS sensor as shown in Figure 2 labeled COM1 and
COM2. Each conforms to the EIA RS232 standard with data speeds between 1200 bps and
115.2kbps. The pin-outs for these connectors are described in Table 2. An interface data
cable (C&C P/N 4250003-6) is supplied with the 2050 for easy startup. The cable
construction is described in Figure 4.
LEMO
Pins
Signal Nomenclature
[DCE w/respect to DB9]
DB9S
Pins
1 CTS Clear To Send 8
2 RD Receive Data 2
3 TD Transmit Data 3
4 DTR Data Terminal Ready 4
5 RTN Return [Ground] 5
6 DSR Data Set Ready 6
7 RTS Request To Send 7
Table 2: Serial Cable Pin-Outs
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2050 User Guide
Figure 2: 2050 Front View
Figure 3: 2050M Only Back View
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2050 User Guide
Figure 4: 6ft Serial Cable C&C P/N 4250003-6
Note – Pin 5 should connect to shield of cable at both ends.
Indicator Panel
Figure 5: 2050 Indicator Panel
The Indicator Panel provides the on/off (I/O) switch and a quick view of the status of the
2050 GPS sensor, corrections source & type, and StarFiresignal strength. Each of the
three indicators has three LEDs, which depict status as detailed in the following tables.
To power the unit on or off, the on/off (I/O) switch must be depressed for more than 3
seconds. During power up of the GPS sensor, all LEDs will be on for a period of 3-5
seconds.
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2050 User Guide
Link LEDs
Note – The Link lights are software configurable via the appropriate NCT proprietary command. Because of
the numerous scenarios available for the Link light, only the factory default configuration [Rover Mode] is
discussed.
LINK Status
Command Mode
Repeating Red to Amber to Green indicates
Searching StarFiresignal
Strong Signal Strength from StarFire
Medium Signal Strength StarFire
Weak Signal Strength StarFire
Table 3: Link Light Indication
Base LEDs
BASE Status
The BASE LEDs are not utilized in the
2050 GPS sensor
Table 4: Base station Indication
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2050 User Guide
GPS LEDs
GPS Status
Power is off
Power is on. No satellites tracked
Tracking satellites, position not available yet
Non-differential positioning
Code based differential positioning
Dual frequency Phase positioning
Table 5: GPS Light Indication
Note – The GPS LEDs will blink at the PVT positioning rate selected (1, 2, 5, 10 and 25 Hz).
1 PPS
The 2050M has the ability to output a precise pulse every second with a relative accuracy to
within 12.5ns, and an absolute accuracy better than 100ns. The 1 PPS is 50-Ohm, TTL
level. By using the appropriate NCT proprietary command, the 1PPS pulse width is user
configurable between 0.01 and 0.50 seconds, with the default width set to 0.10 seconds.
The delay default is set to 0.0 seconds from the GPS zero second mark and is configurable
between 0.0 seconds and 0.999 seconds.
This precise pulse can be used for a variety of time mark applications where precise timing
is a must. The 1PPS pulse is user configurable to sync on the rising or falling edge of the
pulse. Connecting the 1PPS output requires a cable with a BNC male connector.
C&C P/N 425006-3 provides a 0.9m (3ft) long BNC male to BNC male connection.
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