NavCom Technology RT-3020 User manual


RT-3020 User Guide - Rev. E
Table of Contents
Table of Contents................................................. i
Notices.................................................................. ii
Chapter 1 Introduction.................................... 7
System Overview..................................................... 7
Applications .......................................................... 11
Unique Features .................................................... 11
Chapter 2 Interfacing..................................... 13
Electrical Power ..................................................... 13
Communication Ports............................................ 15
Indicator Panel ...................................................... 17
1 PPS..................................................................... 20
CAN Bus/Event...................................................... 20
Chapter 3 Installation .................................... 22
Tri-Mode Antenna ................................................. 22
GPS Sensor............................................................ 24
Communication Ports............................................ 27
GPS Antenna Connector........................................ 28
Chapter 4 Configuration................................ 30
Factory Default Settings......................................... 30
Advanced Configuration Settings........................... 33
Chapter 5 Safety Instructions ........................ 34
FCC Notice............................................................ 34
Transport .............................................................. 34
Maintenance ......................................................... 35
External Power Source ........................................... 35
Safety First............................................................. 35
A
GPS
Sensor Technical Specifications ......... 37
RT-3020S and RT-3020M ...................................... 37
BGPS Antenna Technical Specifications ...... 43
L1+L, L2 GPS Antenna ......................................... 43
CEvent Input Configuration ......................... 45
Glossary............................................................. 47
i

RT-3020 User Guide - Rev. E
Notices
RT-3020
GPS
Products User Guide
P/N
96-310005-3001
Revision E August 2005
Serial Number:
Date Delivered:
Copyright
2002 by NavCom Technology 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.
StarFire
is a registered trademark of
Deere & Company. All other product and brand names
are trademarks or registered trademarks of their
respective holders.
FCC Notice
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
ii

RT-3020 User Guide - Rev. E
(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 TECHNOLOGY, INC. 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 TECHNOLOGY, INC.
SPECIFICALLY DISCLAIMS ALL ASSOCIATED
WARRANTIES, WHETHER EXPRESS OR IMPLIED. IN NO
EVENT WILL NAVCOM TECHNOLOGY, INC. 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
TECHNOLOGY, INC. 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.
Limited Warranty
NavCom Technology, Inc., 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.,
iii

RT-3020 User Guide - Rev. E
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 TECHNOLOGY, INC.
This limited warranty period is one (1) year from date of
purchase.
iv

RT-3020 User Guide - Rev. E
USG FAR
Technical Data Declaration (Jan 1997)
The Contractor, NavCom Technology, Inc., hereby
declares that, to the best of its knowledge and belief,
the technical data delivered herewith under
Government contract (and subcontracts, if appropriate)
are complete, accurate, and comply with the
requirements of the contract concerning such technical
data.
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
RT-3020
GPS
sensor.
Use of this Document
This User Guide is intended to be used by someone
familiar with the concepts of
GPS
and satellite surveying
equipment.
v

RT-3020 User Guide - Rev. E
Note indicates additional information to make
better use of the product.
aIndicates a caution, care, and/or safety situation.
0Warning indicates potentially harmful situations.
Items that have been
ITALICIZED
indicate a term or
acronym that can be found in the Glossary.
Revisions to this User Guide can be obtained in a digital
format from
support.navcomtech.com
vi

RT-3020 User Guide - Rev. E
Chapter 1 Introduction
The RT-3020
GPS
sensor delivers unmatched accuracy
to the precise positioning community who need a
cost-effective, high performance
GPS
sensor. This
unique receiver can transmit or receive corrections via
an onboard
Spread Spectrum Radio (SSR)
.
System Overview
GPS
Sensor
The RT-3020 sensor consists of a 24-channel dual
frequency precision
GPS
receiver with two additional
channels for receiving
Satellite Based Augmentation
System (SBAS)
signals. 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 115
kbps
serial ports. The
RTK
software provides fast initialization. Testing shows that
the system resolves ambiguities at start-up or on
reacquisition of satellites typically within two seconds.
The RT-3020 has a built-in
Spread Spectrum Radio
providing an immediate solution for the system
integrator and real time surveyor. Utilizing the built in
radio for
RTK
measurements, the receivers
communicate using NavCom’s highly efficient
proprietary
RTK
format or other
RTK
formats, such as
RTCM
and CMR. Additionally, the receivers
simultaneously accept corrections for
DGPS
(
WAAS/EGNOS
) assuring seamless position output.
The RT-3020S is packaged for mobility. It can be used
for construction stakeout, boundary surveys, high order
control surveys and topographic surveys in rough
1-7

RT-3020 User Guide - Rev. E
terrain. The 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 RT-3020M is a
real-time kinematic
(
RTK
) sensor
specifically designed for machine control applications in
construction, agriculture, mining and many other fields.
It is equipped with additional features allowing
interconnectivity with a wide variety of antennas,
vehicle data buses and other instrumentation to suit
specific applications and configurations. The RT-3020M
also has a 1
PPS
output port and a combined Event/
CAN
Bus
interface port.
GPS
Antenna
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.
Although rated to 70K feet, this antenna is not
designed for aircraft installations. E-Mail
for aircraft solutions.
Controller
The RT-3020
GPS
sensor is designed for use with an
external c
ontroller
solution connected via one of two
serial
COM
ports.
This may be accomplished using an IBM compatible PC,
Tablet PC or
Personal Digital Assistant
(
PDA
) and a
software program which implements the rich control
language defined for NavCom
GPS
products.
See
the
User’s Guide of your
Controller
Solution for further
information.
1-8

RT-3020 User Guide - Rev. E
Included Items
Figure 1: RT-3020 Supplied Equipment
XRT-3020
GPS
sensor
(RT-3020S
P/N
92-310054-3001)
(RT-3020M
P/N
92-310054-3002)
YCompact
L1
/
L2
GPS
Antenna
(
P/N
82-001002-3002)
Z
GPS
Antenna Cable (
P/N
94-310058-3012)
1-9

RT-3020 User Guide - Rev. E
[
SSR
2.4GHz Radio Antenna (
P/N
82-001000-0003)
\
LEMO
7 Pin to DB9S Data Communications Cable
(
P/N
94-310059-3006)
]CD-Rom (
P/N
96-310006-3001) containing User
Guides to NavCom Technology, Inc. product line,
brochures, software utilities, and technical papers.
^
LEMO
4-Pin Univerasal AC/DC Power Adapter
12vdc 2 amp (
P/N
82-020002-5001)
_RT-3020 User’s Guide {Not Shown}
(Hard Copy
P/N
96-310005-3001)
`Ruggedized Travel Case {Not Shown}
(
P/N
79-100100-0002)
a
SSR
Antenna Adapter {Not Shown}
(
P/N
91-310020-3001
11 American 2-Pin AC power Cord {Not Shown}
1-10

RT-3020 User Guide - Rev. E
Applications
The RT-3020
GPS
sensors meets 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 RT-3020
GPS
sensors have many unique features:
Positioning Flexibility
The RT-3020 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 RT-3020 configures
itself to use the most suitable correction source available
and changes as the survey dictates.
1-11

RT-3020 User Guide - Rev. E
Data Sampling
GPS
L1
and
L2
raw data is 1 to 5Hz 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 5Hz in the
standard configuration and as an optional upgrade as
fast as 10, and 25Hz for high dynamic applications.
GPS
Performance
The NCT-2100
GPS
engine at the heart of the RT-3020
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-2100 to be the best receiver when
facing various
multipath
environments.
Rugged Design
The rugged design of the RT-3020 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.
1-12

RT-3020 User Guide - Rev. E
Chapter 2 Interfacing
This chapter details the RT-3020
GPS
sensor
connectors and status display. Appropriate sources of
electrical power, and how to interface the
communication ports.
Electrical Power
Electrical power is input thru a 4-pin
LEMO
female
connector located on the front panel of the RT-3020,
and labeled ‘DC PWR.’ The pin designations are shown
in Table 1; see Figure 2 for pin rotation on unit.
Pin Description
1
2
Return
3
4
Power Input 10 to 30 VDC
Table 1: External Power Cable Pin-Out
Pins 1 and 2 are connected together inside the RT-3020
GPS
sensor. Pins 3 and 4 are connected together inside
the
GPS
sensor.
When using an external power cable longer
than 5m (15ft), it is recommended that positive voltage
2-13

RT-3020 User Guide - Rev. E
DC be applied on both pins 3 and 4, and return on
both pins 1 and 2.
Navcom P/N 82-020002-5001 Universal AC/DC 12 V 2
Amp Power Adapter comes standard with the RT-
3020S/M GPS receivers. An optional external power
cable, NavCom
P/N
94-310060-3010 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 RT-3020
GPS
sensor. The wiring color code and pin designations are
labeled on this optional cable assembly.
The
GPS
sensor is protected from reverse polarity by an
inline diode. It will operate on any DC voltage between
10 and 30 VDC, capable of supplying the required
current, typically. Power Consumption of the RT-3020 is
typically 5 Watts Maximum.
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.
0Voltages 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.
2-14

RT-3020 User Guide - Rev. E
Communication Ports
The RT-3020
GPS
sensor is fitted with two 7-pin female
LEMO
connector communication ports labeled
COM
1
and
COM
2 located at the bottom front of the
GPS
sensor as shown in Figure 2. 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 (P/N 94-
310059-3006) is supplied with the RT-3020 for easy
startup. The cable construction is described in Figure 4.
LEMO
Pins
Signal Nomenclature
[
DCE
w/respect to
DB9S
]
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
2-15

RT-3020 User Guide - Rev. E
Figure 2: RT-3020 Front View
Figure 3: RT-3020M Only Back View
2-16

RT-3020 User Guide - Rev. E
Figure 4: NavCom Serial Cable 94-310059-3006
Pin 5 should connect to shield of cable at both ends.
Indicator Panel
Figure 5 RT-3020 Indicator Panel
The Indicator Panel provides the on/off (I/O) switch and
a quick view of the status of the RT-3020
GPS
sensor,
corrections source & type, and radio signal strength.
Each of the three indicators has three
LED
s, which
depict status as detailed in the following tables.
2-17

RT-3020 User Guide - Rev. E
To power the unit on or off, the I/O switch must be
depressed for more than 3 seconds. During power up of
the
GPS
sensor, all
LED
s will be on for a period of 3-5
seconds.
Link LEDs
The Link lights are software configurable via the
appropriate NavCom
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
Rapidly repeating Red to Amber to Green
indicates Searching for base radio signal.
Strong Signal Strength from the base radio.
Medium Signal Strength from base radio.
Weak Signal Strength from base radio.
Table 3: Link Light Indication
Base LEDs
If the RT-3020 has been configured as a
Base Station
,
the
LED
s indicate the type of
RTK
corrections being
produced. Where the color of the
LED
will indicate the
format of the correction, the blink rate indicates
specifically which message is being sent. Table 4
2-18
Table of contents
Other NavCom Technology GPS manuals