Leica GMX902 GG User manual

Leica GMX902 GG/
GMX902 GNSS
User Manual
Version 1.3
English

2 GMX902 GG/GMX902 GNSS, Introduction
Introduction
Purchase Congratulations on the purchase of a Leica GMX902 GG/GMX902 GNSS.
This manual contains important safety directions as well as instructions for
setting up the product and operating it. Refer to "4 Safety Directions" for
further information.
Read carefully through the User Manual before you switch on the product.
Product
identification
The type and serial number of your product are indicated on the type plate.
Enter the type and serial number in your manual and always refer to this infor-
mation when you need to contact your agency or Leica Geosystems authorised
service workshop.
Symbols The symbols used in this manual have the following meanings:
Trademarks • Windows is a registered trademark of Microsoft Corporation in the United
States and other countries.
All other trademarks are the property of their respective owners.
Validity of this
manual
This manual applies to the GMX902 GG and GMX902 GNSS.
Type: _______________
Serial No.: _______________
Type Description
Danger Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Warning Indicates a potentially hazardous situation or an unin-
tended use which, if not avoided, could result in death or
serious injury.
Caution Indicates a potentially hazardous situation or an unin-
tended use which, if not avoided, may result in minor or
moderate injury and/or appreciable material, financial and
environmental damage.
Important paragraphs which must be adhered to in prac-
tice as they enable the product to be used in a technically
correct and efficient manner.

GMX902 GG/GMX902 GNSS, Introduction 3
Available
documentation
Refer to the following resources for all GMX902 GG/GMX902 GNSS docu-
mentation/software:
• the Leica GMX900 CD
• https:myworld.leica-geosystems.com
myWorld@Leica Geosystems (https://myworld.leica-geosystems.com)
offers a wide range of services, information and training material.
With direct access to myWorld, you are able to access all relevant services
whenever it is convenient for you, 24 hours a day, 7 days per week. This
increases your efficiency and keeps you and your equipment instantly updated
with the latest information from Leica Geosystems.
Name Description/Format
Leica
GMX902 GG/
GMX902 GNSS
User Manual
All instructions required in order to operate the
product to a basic level are contained in the User
Manual. Provides an overview of the product
together with technical data and safety directions.

Leica GMX900
Series Getting
Start Guide
Included are detailed descriptions of necessary
steps to configure
GMX902 GG/ GMX902 GNSS with Leica GNSS
Spider.

Service Description
myProducts Simply add all Leica Geosystems products that you and your
company own. View detailed information on your products,
buy additional options or Customer Care Packages (CCPs),
update your products with the latest software and keep up-to-
date with the latest documentation.
myService View the service history of your products in Leica Geosystems
Service Centers and detailed information on the services
performed on your products. For your products that are
currently in Leica Geosystems Service Centers view the current
service status and the expected end date of service.
mySupport Create new support requests for your products that will be
answered by your local Leica Geosystems Support Team. View
the complete history of your Support and view detailed infor-
mation on each request in case you want to refer to previous
support requests.
myTraining Enhance your product knowledge with the Leica Geosystems
Campus - Information, Knowledge, Training. Study the latest
online training material or download training material on your
products. Keep up-to-date with the latest News on your prod-
ucts and register for Seminars or Courses in your country.

4 GMX902 GG/GMX902 GNSS, Table of Contents
Table of Contents
In this manual Chapter Page
1 Description of the System 5
1.1 Overview 5
1.2 System Components 5
1.3 Data Streaming 6
1.4 Power Supply 6
1.5 Operation using Leica GNSS Spider 7
1.6 Commands for Remote Control 7
1.7 Accessories 7
1.8 Instrument Components 8
2 Operation 9
2.1 Installation 9
2.2 Equipment Setup 9
2.3 Operating Principles 10
2.4 LED Indicators on GMX902 GG/GMX902 GNSS 11
3 Care and Transport 12
3.1 Transport 12
3.2 Storage 12
3.3 Cleaning and Drying 12
4 Safety Directions 13
4.1 General Introduction 13
4.2 Intended Use 13
4.3 Limits of Use 14
4.4 Responsibilities 14
4.5 Hazards of Use 15
4.6 Electromagnetic Compatibility EMC 18
4.7 FCC Statement, Applicable in U.S. 19
5 Technical Data 20
5.1 GMX902 GG/GMX902 GNSS Technical Data 20
5.1.1 Tracking Characteristics 20
5.1.2 Accuracy 22
5.1.3 Technical Data 23
5.1.4 Pin Assignments and Sockets 25
5.2 Antennas Technical Data 26
5.3 Conformity to National Regulations 28
5.3.1 GMX902 GG/GMX902 GNSS 28
6 International Limited Warranty, Software Licence Agreement 29
Index 30

GMX902 GG/GMX902 GNSS, Description of the System 5
1 Description of the System
1.1 Overview
Design All instruments:
• were designed specifically for monitoring applications, e.g. on bridges
• are highly suited to system integration, the instrument communication
being handled by remote control software - Leica GNSS Spider
• can transmit data for real-time operation in the Leica LB2 format with suit-
able radio equipment, a mobile telephone or modem.
• For further information, refer to "5 Technical Data".
Special features The instruments are equipped with several special features:
• 50Hz (GMX902 GNSS) or 20Hz (GMX902 GG) data for monitoring of high-
frequency movements
• robust, compact metal housing
• low power consumption, including sleep mode
• wide supply voltage range of 10.5-28V
• including SmartTrack+ measurement engine for higher accuracy and higher
availability
• simple mounting
• two serial ports for raw data streaming
•PPSport
• seamless integration with Leica GNSS Spider
1.2 System Components
Main components
Instruments
Once the first operational Galileo satellites are available, a software update will
be required.
Component Description
Instrument To provide streaming of raw satellite data.
Antenna To receive the satellite signals from the GNSS (Global
Navigation Satellite System) satellites.
Leica GNSS Spider The office software including a series of help programs
which support working with GMX902 GG/GMX902 GNSS
instruments.
GMX902ConfigTool The office software required to configure the GMX902
GG/GMX902 GNSS instruments.
Instrument Description
GMX902 GG 72 channels, code and phase. L1/L2 GPS (including L2C),
L1/L2 GLONASS, 4 SBAS.
GMX902 GNSS 120 channels, code and phase. L1/L2/L5 GPS (including
L2C), L1/L2 GLONASS, E1/E5a/E5b/Alt-BOC Galileo,
Compass, 4 SBAS.

6 GMX902 GG/GMX902 GNSS, Description of the System
The GMX902 GNSS instruments are additionally designed to support Compass.
The Compass signal definition is not fully finalised, although test signals have
been tracked in a test environment. As changes can still occur, Leica Geosys-
tems cannot guarantee full Compass compatibility.
Antennas used
with instruments
AS10, AR10, AR25
Leica GNSS Spider The office software which supports configuration and control of GMX902
GG/GMX902 GNSS for reference station and structural monitoring applications.
For further information refer to "1.5 Operation using Leica GNSS Spider".
1.3 Data Streaming
Raw data The instrument can be configured remotely via GNSS Spider such that raw data
in proprietary Leica binary LB2 format can be output from communication ports
1 and 2.
1.4 Power Supply
External power
supply only
• 10.5 V-28 V DC power supply via a converter cable supplied by Leica
Geosystems
or
• A 12 V power supply connected via a cable
Dual power input The instrument can be connected to two independent power supplies via a Y-
cable. The instrument determines the power source with higher voltage.
On/Off behaviour On: The instrument will turn on as soon as the power supply is connected.
Off: If the power supply is disconnected or if the data streaming is disabled, the
instrument will turn off.
Total discharge If an instrument connected to a low powered external battery continues to
operate, total discharge of the battery can occur.

GMX902 GG/GMX902 GNSS, Description of the System 7
1.5 Operation using Leica GNSS Spider
GNSS Spider The reference station software GNSS Spider can be used to operate the instru-
ment.
Use
• to connect from a computer to an instrument locally or remotely.
• to configure instrument operation.
• to monitor instrument operation.
• to receive raw data streams automatically.
• to stream RTK corrections.
• to convert data to RINEX format automatically.
• to archive data files automatically.
• to distribute data files to FTP locations automatically.
• to compute and stream out positions.
Operating system
1.6 Commands for Remote Control
LB2 commands Special commands from Leica Binary (LB2) format can be used to communicate
with the instrument through the configured port. Documentation for LB2 is
available on request from a Leica Geosystems representative.
1.7 Accessories
Accessories Additional equipment such as cables, antennas and power supply are listed in
the setup sections. Any further description of accessories is not part of this
manual.
Refer to the following Equipment Lists:
• GNSS Networks and Reference Stations Equipment List
• Structural Monitoring Equipment List
Operating system Minimum service pack Recommended service
pack
XP Professional SP2 SP3
2003 Server 2 SP1 SP2
2008 Server SP1 SP1
VistaTM Ultimate -SP1

8 GMX902 GG/GMX902 GNSS, Description of the System
1.8 Instrument Components
GMX902 GG/
GMX902 GNSS
components
Do not open the instrument or remove any connector as this action will impair
the protection against water, dust and sand.
Dimensions
a) Housing
b) PWR: power input
c) P1: serial interface for data
d) P2: serial interface for data
input/output
e) PPS: Pulse-per-second output
f) Venting membrane
g) ANT: Antenna port
GMX902_01
b
a
c
d
e
f
g
123 mm
100 mm
40 mm74 mm
167 mm
132 mm
151 mm
GMX902_02

GMX902 GG/GMX902 GNSS, Operation 9
2 Operation
2.1 Installation
Installation
location
It is recommended that the instrument is installed so that it is
• protected from mechanical influences and lightning
• close to the antenna
Installation
orientation
• For inside assembly, the instrument can be installed in any direction
• When installing the instrument outside, orientate the instrument vertically
so that the connector points are pointing downwards
Mounting The instrument must be fastened with four M6 screws (or equivalent).
Cable installation Ensure that the cables between the instrument and antenna are positioned to
prevent them from becoming bent, stretched or squeezed. For the installation
of the cables, the general rules for the installation of electrical wiring apply.
Please consider that a well-planned and thoroughly carried out electric installa-
tion not only protects the cables against damage, but also looks professional.
2.2 Equipment Setup
Setup with direct
serial
The following diagram shows the basic equipment setup for an instrument
connected locally to GNSS Spider via serial cable.
Remote set up with
radio
The following diagram shows the basic equipment setup for an instrument
connected locally to GNSS Spider via radio.
a) Computer
b) Power supply
c) GMX902 GG/GMX902 GNSS
d) Surge arrestor
e) GNSS antenna
GMX902_03
ab
c
d
e
a) Computer
b) Radio modem
c) Power supply
d) GMX902 GG/GMX902 GNSS
e) Surge arrestor
f) Radio modem
g) GNSS antenna
GMX902_04
ac
d
e
g
b
f

10 GMX902 GG/GMX902 GNSS, Operation
Setup with
LAN/WAN
The following diagram shows the basic equipment setup for an instrument
connected locally to GNSS Spider via LAN/WAN.
Connecting
instrument to
GNSS Spider
Any further description of the configuration of the instrument is not part of the
User Manual.
Refer to the "GMX900 Series Getting Started Guide with Leica GNSS Spider"
which is included on the GMX900 CD.
2.3 Operating Principles
GMX902
GG/GMX902 GNSS
operation
Recommended operation of the GMX902 GG/GMX902 GNSS is with the GMX902
GG/GMX902 GNSS Web interface or Leica GNSS Spider software or with the
Leica Binary 2 (LB2) interface. Contact your Leica Geosystems representative
for information on LB2 documentation.
The GMX902 GG/GMX902 GNSS instrument is delivered with default settings
which cover the needs of the typical user. Use the Web interface or Leica GNSS
Spider to adjust the GMX902 GG/GMX902 GNSS settings.
Sleep mode The instrument reverts to sleep mode when
• the power falls below 10.5 V.
• there is no traffic on the ports P1/P2 for more than 10 minutes after the
initial instrument start up, or for more than the configured sleep mode
time.
The sleep mode is switched off per default.
Use the tool "GMX902ConfigTool" on the GMX900 CD to change the sleep
mode.
When in sleep mode, the PWR LED is off. Any traffic on the serial port will wake
up the instrument again.
a) Computer
b) Power supply
c) Serial-IP convertor
d) GMX902 GG/GMX902 GNSS
e) Surge arrestor
f) GNSS antenna
g) Connection via LAN/WAN
GMX902_05
ab
d
e
f
c
g
LAN/
WAN

GMX902 GG/GMX902 GNSS, Operation 11
2.4 LED Indicators on GMX902 GG/GMX902 GNSS
LED indicators Each GMX902 GG/GMX902 GNSS has four LED’s (Light Emitting Diode) on its
cover. The LED’s indicate basic instrument status.
Description of the
LED’s
a) PWR: Power LED
b) P1: Port 1 LED
c) P2: Port 2 LED
d) TRK: Tracking LED
GMX902_06
abcd
IF the is THEN
PWR LED off power is off, low (below 10.5 V) or in sleep
mode.
green power is okay.
orange power below 11 V.
red instrument is starting up.
TRK LED off no satellites are tracked.
orange sufficient satellites are tracked to calculate
the position.
flashing orange satellites are tracked, but position is not yet
available.
P1 LED off data is not being transferred.
flashing orange data is being transferred.
P2 LED off data is not being transferred.
flashing orange data is being transferred.

12 GMX902 GG/GMX902 GNSS, Care and Transport
3 Care and Transport
3.1 Transport
Transport in a road
vehicle
Never carry the product loose in a road vehicle, as it can be affected by shock
and vibration. Always carry the product in its transport container and secure it.
Shipping When transporting the product by rail, air or sea, always use the complete orig-
inal Leica Geosystems packaging, transport container and cardboard box, or its
equivalent, to protect against shock and vibration.
3.2 Storage
Product Respect the temperature limits when storing the equipment, particularly in
summer if the equipment is inside a vehicle. Refer to "5 Technical Data" for
information about temperature limits.
3.3 Cleaning and Drying
Product and
accessories
• Use only a clean, soft, lint-free cloth for cleaning. If necessary, moisten the
cloth with water or pure alcohol. Do not use other liquids; these may attack
the polymer components.
Damp products Dry the product, the transport container, the foam inserts and the accessories
at a temperature not greater than 40°C/104°F and clean them. Do not repack
until everything is dry. Always close the transport container when using in the
field.
Cables and plugs Keep plugs clean and dry. Blow away any dirt lodged in the plugs of the
connecting cables.

GMX902 GG/GMX902 GNSS, Safety Directions 13
4 Safety Directions
4.1 General Introduction
Description The following directions enable the person responsible for the product, and the
person who actually uses the equipment, to anticipate and avoid operational
hazards.
The person responsible for the product must ensure that all users understand
these directions and adhere to them.
4.2 Intended Use
Permitted use • Computing with software.
• Carrying out measurement tasks using various GNSS measuring techniques.
• Recording GNSS and point related data.
• Data communication with external appliances.
• Measuring raw data and computing coordinates using carrier phase and
code signal from GNSS satellites.
Adverse use • Use of the product without instruction.
• Use outside of the intended limits.
• Disabling safety systems.
• Removal of hazard notices.
• Opening the product using tools, for example screwdriver, unless this is
permitted for certain functions.
• Modification or conversion of the product.
• Use after misappropriation.
• Use of products with recognisable damages or defects.
• Use with accessories from other manufacturers without the prior explicit
approval of Leica Geosystems.
• Inadequate safeguards at the working site, for example when measuring on
roads.
• Controlling of machines, moving objects or similar monitoring application
without additional control- and safety installations.
Warning Adverse use can lead to injury, malfunction and damage.
It is the task of the person responsible for the equipment to inform the user
about hazards and how to counteract them. The product is not to be operated
until the user has been instructed on how to work with it.

14 GMX902 GG/GMX902 GNSS, Safety Directions
4.3 Limits of Use
Environment Suitable for use in an atmosphere appropriate for permanent human habitation:
not suitable for use in aggressive or explosive environments.
Danger Local safety authorities and safety experts must be contacted before working
in hazardous areas, or close to electrical installations or similar situations by the
person in charge of the product.
4.4 Responsibilities
Manufacturer of
the product
Leica Geosystems AG, CH-9435 Heerbrugg, hereinafter referred to as Leica
Geosystems, is responsible for supplying the product, including the user manual
and original accessories, in a safe condition.
Manufacturers of
non
Leica Geosystems
accessories
The manufacturers of non Leica Geosystems accessories for the product are
responsible for developing, implementing and communicating safety concepts
for their products, and are also responsible for the effectiveness of those
safety concepts in combination with the Leica Geosystems product.
Person in charge of
the product
The person in charge of the product has the following duties:
• To understand the safety instructions on the product and the instructions
in the user manual.
• To be familiar with local regulations relating to safety and accident preven-
tion.
• To inform Leica Geosystems immediately if the product and the application
becomes unsafe.
• To ensure that the national laws, regulations and conditions for the opera-
tion of radio transmitters are respected.
Warning The person responsible for the product must ensure that it is used in accord-
ance with the instructions. This person is also accountable for the training and
the deployment of personnel who use the product and for the safety of the
equipment in use.

GMX902 GG/GMX902 GNSS, Safety Directions 15
4.5 Hazards of Use
Warning The absence of instruction, or the inadequate imparting of instruction, can lead
to incorrect or adverse use, and can cause accidents with far-reaching human,
material, financial and environmental consequences.
Precautions:
All users must follow the safety directions given by the manufacturer and the
directions of the person responsible for the product.
Caution Watch out for erroneous measurement results if the product has been dropped
or has been misused, modified, stored for long periods or transported.
Precautions:
Periodically carry out test measurements and perform the field adjustments
indicated in the user manual, particularly after the product has been subjected
to abnormal use and before and after important measurements.
Warning During dynamic applications, for example stakeout procedures there is a danger
of accidents occurring if the user does not pay attention to the environmental
conditions around, for example obstacles, excavations or traffic.
Precautions:
The person responsible for the product must make all users fully aware of the
existing dangers.
Warning Inadequate securing of the working site can lead to dangerous situations, for
example in traffic, on building sites, and at industrial installations.
Precautions:
Always ensure that the working site is adequately secured. Adhere to the regu-
lations governing safety and accident prevention and road traffic.
Warning If computers intended for use indoors are used in the field there is a danger of
electric shock.
Precautions:
Adhere to the instructions given by the computer manufacturer regarding field
use with Leica Geosystems products.
Caution If the accessories used with the product are not properly secured and the
product is subjected to mechanical shock, for example blows or falling, the
product may be damaged or people can sustain injury.
Precautions:
When setting-up the product, make sure that the accessories are correctly
adapted, fitted, secured, and locked in position.
Avoid subjecting the product to mechanical stress.

16 GMX902 GG/GMX902 GNSS, Safety Directions
Danger If the product is used with accessories, for example on masts, staffs, poles, you
may increase the risk of being struck by lightning. Danger from high voltages
also exists near power lines. Lightning, voltage peaks, or the touching of power
lines can cause damage, injury and death.
Precautions:
• Do not use the product in a thunderstorm as you can increase the risk of
being struck by lightning.
• Be sure to remain at a safe distance from electrical installations. Do not use
the product directly under or close to power lines. If it is essential to work
in such an environment contact the safety authorities responsible for elec-
trical installations and follow their instructions.
• If the product has to be permanently mounted in an exposed location, it is
advisable to provide a lightning conductor system. A suggestion on how to
design a lightning conductor for the product is given below. Always follow
the regulations in force in your country regarding grounding antennas and
masts. These installations must be carried out by an authorised specialist.
• To prevent damages due to indirect lightning strikes (voltage spikes) cables,
for example for antenna, power source or modem should be protected with
appropriate protection elements, like a lightning arrester. These installa-
tions must be carried out by an authorised specialist.
• If there is a risk of a thunderstorm, or if the equipment is to remain unused
and unattended for a long period, protect your product additionally by
unplugging all systems components and disconnecting all connecting cables
and supply cables, for example, instrument - antenna.
Lightning
conductors
Suggestion for design of a lightning conductor for a GNSS system:
1) On non-metallic structures
Protection by air terminals is recommended. An air terminal is a pointed
solid or tubular rod of conducting material with proper mounting and
connection to a conductor. The position of four air terminals can be
uniformly distributed around the antenna at a distance equal to the height
of the air terminal.
The air terminal diameter should be 12 mm for copper or 15 mm for
aluminium. The height of the air terminals should be 25 cm to 50 cm. All air
terminals should be connected to the down conductors. The diameter of
the air terminal should be kept to a minimum to reduce GNSS signal
shading.
2) On metallic structures
Protection is as described for non-metallic structures, but the air terminals
can be connected directly to the conducting structure without the need for
down conductors.
Air terminal
arrangement, plan
view
a) Antenna
b) Support structure
c) Air terminal
GS_039
a
b
c

GMX902 GG/GMX902 GNSS, Safety Directions 17
Grounding the
instrument/
antenna
Warning If the product is improperly disposed of, the following can happen:
• If polymer parts are burnt, poisonous gases are produced which may impair
health.
• If batteries are damaged or are heated strongly, they can explode and cause
poisoning, burning, corrosion or environmental contamination.
• By disposing of the product irresponsibly you may enable unauthorised
persons to use it in contravention of the regulations, exposing themselves
and third parties to the risk of severe injury and rendering the environment
liable to contamination.
Precautions:
Product-specific treatment and waste management information can be down-
loaded from the Leica Geosystems home page at http://www.leica-
geosystems.com/treatment or received from your Leica Geosystems dealer.
Warning Only Leica Geosystems authorised service workshops are entitled to repair
these products.
a) Antenna
b) Lightning conductor array
c) Antenna/instrument connection
d) Metallic mast
e) Connection to earth
GS_040
e
d
c
a
b
The product must not be disposed with household waste.
Dispose of the product appropriately in accordance with the
national regulations in force in your country.
Always prevent access to the product by unauthorised
personnel.

18 GMX902 GG/GMX902 GNSS, Safety Directions
4.6 Electromagnetic Compatibility EMC
Description The term Electromagnetic Compatibility is taken to mean the capability of the
product to function smoothly in an environment where electromagnetic radia-
tion and electrostatic discharges are present, and without causing electromag-
netic disturbances to other equipment.
Warning Electromagnetic radiation can cause disturbances in other equipment.
Although the product meets the strict regulations and standards which are in
force in this respect, Leica Geosystems cannot completely exclude the possi-
bility that other equipment may be disturbed.
Caution There is a risk that disturbances may be caused in other equipment if the
product is used with accessories from other manufacturers, for example field
computers, personal computers, two-way radios, non-standard cables or
external batteries.
Precautions:
Use only the equipment and accessories recommended by Leica Geosystems.
When combined with the product, they meet the strict requirements stipulated
by the guidelines and standards. When using computers and two-way radios,
pay attention to the information about electromagnetic compatibility provided
by the manufacturer.
Caution Disturbances caused by electromagnetic radiation can result in erroneous
measurements.
Although the product meets the strict regulations and standards which are in
force in this respect, Leica Geosystems cannot completely exclude the possi-
bility that the product may be disturbed by intense electromagnetic radiation,
for example, near radio transmitters, two-way radios or diesel generators.
Precautions:
Check the plausibility of results obtained under these conditions.
Warning If the product is operated with connecting cables attached at only one of their
two ends, for example external supply cables, interface cables, the permitted
level of electromagnetic radiation may be exceeded and the correct functioning
of other products may be impaired.
Precautions:
While the product is in use, connecting cables, for example product to external
battery, product to computer, must be connected at both ends.

GMX902 GG/GMX902 GNSS, Safety Directions 19
4.7 FCC Statement, Applicable in U.S.
The greyed paragraph below is only applicable for products without radio.
Warning
Warning Changes or modifications not expressly approved by Leica Geosystems for
compliance could void the user's authority to operate the equipment.
Labelling
GMX902 GG/
GMX902 GNSS
This equipment has been tested and found to comply with the limits for a Class
B digital device, pursuant to part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television recep-
tion, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
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.
Advisory notice: this receiver uses the P-Code signal,
which by U.S. policy, may be switched off without notice.
Type: GMX... Art.No.
XXXXXX
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .
. . . . . . . . . . . .
Manufactured: XX.2005 S.No.
Made in Switzerland XXXXX
GMX902_07

20 GMX902 GG/GMX902 GNSS, Technical Data
5 Technical Data
5.1 GMX902 GG/GMX902 GNSS Technical Data
5.1.1 Tracking Characteristics
GNSS technology SmartTrack+
Satellite reception
Instrument
channels
Supported codes
and phases
GPS
GLONASS
Galileo
GMX902 GG: Dual frequency, GPS and GLONASS
GMX902 GNSS: Multi-frequency, GPS, GLONASS and Galileo
GMX902 GG: 72 channels, GPS L1/L2, GLONASS L1/L2, 20Hz.
GMX902 GNSS: 120 channels, GPS L1/L2/L5, GLONASS L1/L2, Galileo
L1/E5a/E5b/E5 Alt-BOC, 50Hz*.
*Restrictions to the number of tracked satellites and signals can apply when
operating at 50Hz. For best operation at 50Hz, it is recommended to
stream GPS only data on L1/L2 (and optionally L5) frequencies with no
Doppler.
Type L1 L2 L5
GMX902 GG Carrier phase,
C/A-code
Carrier phase, C-
code (L2C) and
P2-code
-
GMX902 GNSS Carrier phase,
C/A-code
Carrier phase, C-
code (L2C) and
P2-code
Carrier phase,
code
Type L1 L2
GMX902 GG Carrier phase, C/A-code Carrier phase, P-code
GMX902 GNSS Carrier phase, C/A-code Carrier phase, C-code and
P-code
Type E1 E5a E5b Alt-BOC
GMX902GG----
GMX902 GNSS Carrier
phase, code
Carrier
phase, code
Carrier
phase, code
Carrier
phase, code