Leica Zeno GG04 plus User manual

Leica Zeno GG04 plus
User Manual
Version 1.0
English

Introduction
Congratulations on the purchase of a Leica GG04 plus GNSS instrument.
This manual contains important safety directions as well as instructions for set-
ting up the product and operating it. Refer to "2 Description of the System" for
further information.
Read carefully through the User Manual before you switch on the product.
The model and serial number of your product are indicated on the type plate.
Always refer to this information when you need to contact your agency or
Leica Geosystems authorised service centre.
•Windows is a registered trademark of Microsoft Corporation in the United
States and other countries
•
Bluetooth
®is a registered trademark of Bluetooth SIG, Inc.
•The operating system is using the Android Open Source Project (AOSP).
The license associated with it is available at https://source.android.com/
source/licenses.html#android-open-source-project-license.
•iPad and iPhone are trademarks of Apple Inc., registered in the U.S. and
other countries. iPad Air, iPad pro and iPad mini are trademarks of Apple
Inc
Refer to the Apple Trademark List at www.apple.com/legal/intellectual-
property/trademark/appletmlist.html for the correct trademark symbol.
All other trademarks are the property of their respective owners.
This manual applies to all models of the Leica GG04 plusGNSS instrument.
Where there are differences between the various instruments they are clearly
described.
Name Description/Format
LeicaGG04
plus Quick
Guide
Provides an overview of the product together with
technical data and safety directions. Intended as a
quick reference guide.

LeicaGG04
plus 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.
-
Refer to the myWorld web page for all GG04 plus documentation/soft-
ware:
•https://myworld.leica-geosystems.com
Purchase
Product Identification
Trademarks
Validity of this man-
ual
Available documenta-
tion
2

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Table of Contents
1 Safety Directions 5
1.1 General Introduction 5
1.2 Definition of Use 6
1.3 Limits of Use 6
1.4 Responsibilities 6
1.5 Hazards of Use 7
1.6 Electromagnetic Compatibility EMC 11
1.7 FCC Statement, Applicable in U.S. 13
2 Description of the System 15
2.1 General Information 15
2.2 System Components 16
2.3 Data Collection 17
2.4 Power Concept 17
2.5 Leica Zeno GIS Software 18
2.6 Accessories 18
3 Operation 19
3.1 Guidelines for Correct Results with GNSS Surveys 19
3.2 Batteries 19
3.2.1 Operating Principles 19
3.2.2 Battery for GG04 plus 19
3.3 Equipment Setup as a Real-Time Rover 20
3.3.1 Setup with Leica Zeno GIS Hardware and Software 20
3.3.2 Setup with Third-Party Mobile Devices 21
3.4 Connection with Leica Zeno GIS Software 23
3.5 Correction Service Spot Lite and Spot Prime (PPP) 26
4 Care and Transport 27
4.1 Transport 27
4.2 Storage 27
4.3 Cleaning and Drying 27
5 Technical Data 29
5.1 Tracking Characteristics GG04 plus 29
5.2 Accuracy 29
5.3 Technical Data 30
5.4 Conformity to National Regulations 32
5.4.1 Dangerous Goods Regulations 33
6 Software Licence Agreement 34
Appendix A Firmware Upgrade 35
Appendix B Pin Assignments and Sockets 36
4 Table of Contents

1 Safety Directions
1.1 General Introduction
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.
Warning messages are an essential part of the safety concept of the instru-
ment. They appear wherever hazards or hazardous situations can occur.
Warning messages...
•make the user alert about direct and indirect hazards concerning the use
of the product.
•contain general rules of behaviour.
For the users‘ safety, all safety instructions and safety messages shall be
strictly observed and followed! Therefore, the manual must always be available
to all persons performing any tasks described here.
DANGER, WARNING, CAUTION and NOTICE are standardised signal words for
identifying levels of hazards and risks related to personal injury and property
damage. For your safety, it is important to read and fully understand the fol-
lowing table with the different signal words and their definitions! Supplemen-
tary safety information symbols may be placed within a warning message as
well as supplementary text.
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 unintended use which, if not avoided,
could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation or
an unintended use which, if not avoided,
may result in minor or moderate injury.
NOTICE
Indicates a potentially hazardous situation or
an unintended use which, if not avoided,
may result in appreciable material, financial
and environmental damage.
☞Important paragraphs which must be adhered
to in practice as they enable the product to
be used in a technically correct and efficient
manner.
Description
About Warning Mes-
sages
Safety Directions 5

1.2 Definition of Use
•Measuring raw data using carrier phase and code signal from GNSS satel-
lites.
•Computing with software.
•Recording measurements.
•Recording GNSS and point related data.
•Carrying out measurement tasks using various GNSS measuring techni-
ques.
•Data communication with external appliances.
•Use of the product without instruction.
•Use outside of the intended use and 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 recognizable damages or defects.
•Use with accessories from other manufacturers without the prior explicit
approval of Leica Geosystems.
•Inadequate safeguards at the working site.
•Controlling of machines, moving objects or similar monitoring application
without additional control and safety installations.
1.3 Limits of Use
Suitable for use in an atmosphere appropriate for permanent human habita-
tion: not suitable for use in aggressive or explosive environments.
DANGER
▶Local safety authorities and safety experts must be contacted before work-
ing in hazardous areas, or close to electrical installations or similar situa-
tions by the person in charge of the product.
1.4 Responsibilities
Leica Geosystems AG, CH-9435 Heerbrugg, hereinafter referred to as Leica
Geosystems, is responsible for supplying the product, including the user man-
ual and original accessories, in a safe condition.
Intended use
Reasonably foreseea-
ble misuse
Environment
Manufacturer of the
product
6 Safety Directions

The person responsible for the product has the following duties:
•To understand the safety instructions on the product and the instructions
in the user manual.
•To ensure that it is used in accordance with the instructions.
•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 the product are respected.
1.5 Hazards of Use
DANGER
Because of the risk of electrocution, it is dangerous to use poles, levelling
staffs and extensions in the vicinity of electrical installations such as power
cables or electrical railways.
Precautions:
▶Keep at a safe distance from electrical installations. If it is essential to
work in this environment, first contact the safety authorities responsible
for the electrical installations and follow their instructions.
Person responsible
for the product
Safety Directions 7

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 vol-
tages 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
electrical 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 pro-
tected with appropriate protection elements, like a lightning arrester. These
installations 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.
WARNING
During dynamic applications, for example stakeout procedures there is a dan-
ger of accidents occurring if the user does not pay attention to the environ-
mental 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
regulations governing safety, accident prevention and road traffic.
8 Safety Directions

WARNING
If the product is used with accessories, for example masts, staffs, poles, you
may increase the risk of being struck by lightning.
Precautions:
▶Do not use the product in a thunderstorm.
WARNING
High mechanical stress, high ambient temperatures or immersion into fluids
can cause leakage, fire or explosions of the batteries.
Precautions:
▶Protect the batteries from mechanical influences and high ambient temper-
atures. Do not drop or immerse batteries into fluids.
WARNING
If battery terminals are short circuited e.g. by coming in contact with jewellery,
keys, metallised paper or other metals, the battery can overheat and cause
injury or fire, for example by storing or transporting in pockets.
Precautions:
▶Make sure that the battery terminals do not come into contact with metal-
lic objects.
WARNING
Incorrect fastening of the external antenna to vehicles or transporters poses
the risk of the equipment being broken by mechanical influence, vibration or
airstream. This may result in accident and physical injury.
Precautions:
▶Attach the external antenna professionally. The external antenna must be
secured additionally, for example by use of a safety cord. Ensure that the
mounting device is correctly mounted and able to carry the weight of the
external antenna (>1 kg) safely.
Safety Directions 9

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:
▶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 per-
sonnel.
Product-specific treatment and waste management information can be
received from your Leica Geosystems distributor.
WARNING
Only Leica Geosystems authorised service centres are entitled to repair these
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.
CAUTION
During the transport, shipping or disposal of batteries it is possible for inappro-
priate mechanical influences to constitute a fire hazard.
Precautions:
▶Before shipping the product or disposing of it, discharge the batteries by
running the product until they are flat.
When transporting or shipping batteries, the person in charge of the prod-
uct must ensure that the applicable national and international rules and
regulations are observed. Before transportation or shipping contact your
local passenger or freight transport company.
10 Safety Directions

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 con-
nection 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 alumi-
nium. The height of the air terminals should be 25 cm to 50 cm. All air ter-
minals 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.
GS_039
a
b
c
a Antenna
b Support structure
c Air terminal
GS_040 e
d
c
a
b
a Antenna
b Lightning conductor array
c Antenna/instrument connec-
tion
d Metallic mast
e Connection to earth
1.6 Electromagnetic Compatibility EMC
The term Electromagnetic Compatibility is taken to mean the capability of the
product to function smoothly in an environment where electromagnetic radia-
Lightning conductors
Air terminal arrange-
ment, plan view
Grounding the instru-
ment/antenna
Description
Safety Directions 11

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 possibil-
ity that other equipment may be disturbed.
CAUTION
There is a risk that disturbances may be caused in other equipment if the prod-
uct is used with accessories from other manufacturers, for example field com-
puters, personal computers or other electronic equipment, non-standard cables
or external batteries.
Precautions:
▶Use only the equipment and accessories recommended by Leica Geosys-
tems. When combined with the product, they meet the strict requirements
stipulated by the guidelines and standards. When using computers or other
electronic equipment, pay attention to the information about electromag-
netic 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 possibil-
ity 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.
CAUTION
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.
12 Safety Directions

Use of product with Bluetooth:
WARNING
Electromagnetic radiation can cause disturbances in other equipment, in instal-
lations, in medical devices, for example pacemakers or hearing aids and in air-
craft. It can also affect humans and animals.
Precautions:
▶Although the product meets in combination with radio or digital cellular
phone devices recommended by Leica Geosystems the strict regulations
and standards which are in force in this respect, Leica Geosystems cannot
completely exclude the possibility that other equipment may be disturbed
or that humans or animals may be affected.
•Do not operate the product with radio or digital cellular phone devices
in the vicinity of filling stations or chemical installations, or in other
areas where an explosion hazard exists.
•Do not operate the product with radio or digital cellular phone devices
near to medical equipment.
•Do not operate the product with radio or digital cellular phone devices
in aircraft.
1.7 FCC Statement, Applicable in U.S.
WARNING
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 fre-
quency 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 reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to cor-
rect the interference by one or more of the following meas-
ures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and the
receiver.
•Connect the equipment into an outlet on a circuit differ-
ent from that to which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician
for help.
Bluetooth
Safety Directions 13

WARNING
This Class (B) digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe (B) est conforme à la norme NMB-003 du
Canada.
WARNING
Changes or modifications not expressly approved by Leica Geosystems for
compliance could void the user's authority to operate the equipment.
0015185_001
0
015185_00
1
This device contains
a transmitter:
IC: 5325A-0946
FCC-ID: PVH0946
R 204-210003
Model: GG04 Art.No.: 123456
Equip. No.: 1234567 S.No.: 1234567
Power: 12V --- nominal / 0.3 A max.
Leica Geosystems AG
CH-9435 Heerbrugg
Manufactured: 20XX
Made in Switzerland
005044_003005044
_003
Labelling GG04 plus
Labelling internal bat-
tery GEB212
14 Safety Directions

2 Description of the System
2.1 General Information
The instrument
•is designed to be used on a pole. It calculates a position from the compu-
ted ranges to all visible and activated GNSS (Global Navigation Satellite
System) satellites.
•can be used with any existing Leica Zeno GIS hardware, like the CS25,
CS25 plus, CS25 GNSS, CS25 LRBT, Zeno 5, Zeno 10, Zeno 15 or with the
following third-party hardware in combination with Zeno Connect:
•Selected Android phones with Android version > 4.1,
•Selected Android tablets with Android version > 4.1,
•Windows 7/Windows 8/Windows 10 PC/Laptop,
•on selected iOS tablets,
•on selected iOS phones.
•can communicate with Leica Zeno GIS software:
•Zeno Mobile,
•Zeno Connect (on Windows 7/Windows 8/Windows 10, Android ver-
sion > 4.1 or iOS), or
•Zeno Field
•can be configured to track all currently available satellite systems with all
included signals (multi-frequency and multi-satellite system).
•can be used for high accuracy data collection with real-time corrections
coming by L-band satellites (Precise Point Positioning - PPP).
•can increase positioning accuracy through various correction services, like
SBAS, RTCM corrections or Spot options (Precise Point Positioning - PPP).
The instrument contains several special features:
•Robust instrument with integrated antenna and built-in ground plane.
•Low power consumption.
•Simple mounting.
•Seamless integration with all available Leica Zeno GIS software.
•LED indicators for power, Bluetooth and signal reception.
•Multiple upgrade options.
•Provide NMEA messages output on different Bluetooth ports.
The instrument has two different firmware types where the GNSS calculation is
done:
•the system engine firmware,
•the measurement engine firmware.
The instrument is delivered with the latest firmware versions installed. If new
firmware versions are released at a later point in time, refer to "A Firmware
Upgrade" on how to upgrade the instrument.
Design
Special features
Firmware concept
Description of the System 15

☞To ensure best tracking performance, verify to have the most recent
Leica Zeno GIS measurement engine firmware installed on the instru-
ment.
2.2 System Components
The GG04 plus represents the so called instrument.
Component Description
Integrated antenna Receiving signals from a GNSS (Global Navigation
Satellite System).
Bluetooth To wireless pair with Leica Zeno GIS hardware or
third-party hardware.
Battery The battery compartment holds the GEB212 battery
for power supply.
LEDs Indication of power, Bluetooth and signal reception.
LEMO-1 connector Serial by RS232 or USB communication.
5/8" Whitworth
thread
Mounting the instrument for observation.
012209_001
c
d
a
b
e
f
g
a LEMO-1 connector,
RS232 and USB port
b Whitworth thread, for
instrument mounting
c Tracking LED
d Bluetooth LED
e Power LED
f ON/OFF key
g Battery compartment
Do not open the instrument or remove any connector as this action impairs the
protection against water, dust and sand. Open the instrument for battery han-
dling without exception in dry and clean conditions only.
The GG04 plus has Light Emitting Diode indicators. They indicate the basic
instrument status.
Main components
Interface
☞
LED Indicators
16 Description of the System

abc
012264_001
a Tracking LED
b Bluetooth LED
c Power LED
Description of the LEDs
LED LED Status Status of the Instrument
Tracking LED Green Enough satellites tracked to compute position.
Dark No position computed.
Bluetooth LED Green The antenna is ready to be connected to.
Blue Connection established to a Bluetooth device.
Power LED Off Power is off.
Green Power is 100%…20%.
Red Power is 20%…5%.
Flashing red Power is low (<5%).
2.3 Data Collection
The instrument can be connected with Leica Zeno GIS software and Leica Zeno
hardware or selected Android, iOS or Windows devices to collect or verify
assets in the field and to collect raw data. Our office software fully supports
the collected GG04 plus data either to review and adapt or to post-process col-
lected raw data. The setting for the GG04 plus smart antenna can be adjusted
with different provided tools.
2.4 Power Concept
Use the batteries, chargers and accessories recommended by Leica Geosystems
to ensure the correct functionality of the instrument.
Power for the instrument can be supplied internally only.
Internal power supply: One battery (GEB212) fits into the instrument.
Live and raw data col-
lection
General
Power options
Description of the System 17

•On: The instrument turns on as soon as the power supply is connected
and the power key is pressed.
•Off: To turn off the instrument push either the power key or disconnect
the power supply.
If an instrument connected to a low powered external battery continues to
operate, total discharge of the battery can occur.
2.5 Leica Zeno GIS Software
All Leica Zeno GIS hardware and software can utilise the GG04 plus with a sur-
vey pole. The compatible hardware includes the Zeno 5, Zeno 10, Zeno 15,
CS25, CS25 plus, CS25 GNSS, CS25 LRBT and selected Android, iOS or Windows
devices.
With the Leica Zeno GIS software you can do different things:
•Seamlessly connect to the GG04 plus smart antenna through Bluetooth.
•Compute positions.
•Configure the smart antenna.
•Collect raw data from the smart antenna.
•Collect live data.
•Configure RTK connections to improve positioning accuracy.
•Export collected data in different formats.
Refer to the respective software documentation for further information.
A Leica
Zeno Connect license is already included with the GG04 plus in order to use the
antenna on Android/iOS moblile devices (smartphones/tablets) by Zeno Con-
nect from the Google Play Store or Apple App Store (iOS).
For third-party devices, only Zeno Connect is available through the App Store.
2.6 Accessories
Extra equipment such as cables and universal pole holders are listed in the
setup sections. Any further description of accessories is not part of this man-
ual.
Refer to the Leica Zeno GIS Equipment List.
On/Off behaviour
Total discharge
Description
Leica Zeno Connect
on third-party devices
Description
18 Description of the System

3 Operation
3.1 Guidelines for Correct Results with GNSS Surveys
Successful GNSS measurements require undisturbed satellite signal reception,
especially at the instrument which serves as a base. For kinematic use, be sure
to select measurement positions with best satellite reception possible. Use the
instrument in location which is free of obstructions such as trees, buildings or
mountains for best measurement results.
Centre the instrument precisely over the target positions.
3.2 Batteries
3.2.1 Operating Principles
•The battery must be charged before using it for the first time because it is
delivered with an energy content as low as possible.
•The permissible temperature range for charging is from 0 °C to +40 °C/
+32 °F to +104 °F. For optimal charging, we recommend charging the bat-
teries at a low ambient temperature of +10 °C to +20 °C/+50 °F to +68 °F
if possible.
•It is normal for the battery to become warm during charging. Using the
chargers recommended by Leica Geosystems, it is not possible to charge
the battery once the temperature is too high.
•For new batteries or batteries that have been stored for a long time
(> three months), it is effectual to make only one charge/discharge cycle.
•For Li-Ion batteries, a single discharging and charging cycle is sufficient. We
recommend carrying out the process when the battery capacity indicated
on the charger or on a Leica Geosystems product deviates significantly
from the actual battery capacity available.
•The batteries can be operated from −20 °C to +55 °C/−4 °F to +131 °F.
•Low operating temperatures reduce the capacity that can be drawn; high
operating temperatures reduce the service life of the battery.
3.2.2 Battery for GG04 plus
012536_001012536
_
00
1
12
4
3
5
76
Undisturbed satellite
signal reception
Centred instrument
First-time Use/Charg-
ing Batteries
Operation / Discharg-
ing
Change Qattery btep-
by-step
Operation 19

Step Description
☞Turn the GG04 plus over to gain access to the battery compartment.
1. Push the slide fastener in the direction of the arrow with the open-
lock symbol.
2. Open the battery compartment.
3. Pull the battery from the battery compartment.
4. A pictogram of the battery is displayed inside the battery compart-
ment. It is a visual aid to help in placing the battery correctly.
5. Place the battery into the battery compartment, ensuring that the
contacts are facing outward. Click the battery into position.
6. Close the battery compartment.
7. Lock the battery compartment by pushing the slide fastener in the
direction of the arrow with the close-lock symbol.
3.3 Equipment Setup as a Real-Time Rover
3.3.1 Setup with Leica Zeno GIS Hardware and Software
The equipment setup is used for real-time rover with extended periods of use
in the field.
This chapter shows a possible pole setup with Leica Zeno GIS hardware and
software.
Connection between the GG04 plus instrument and the field controller is made
through Bluetooth. All hardware is fixed on a Leica carbon pole in this example.
•The antenna is mounted directly using screw fitting.
•Carbon fibre poles are used. They can be replaced with their aluminium
equivalent without any change to these instructions.
Use
Description
☞
20 Operation