RACONRAdar beaCON, A radar transponder used to mark navigational hazards.
RATDMARandom Access Time Division Multiple Access
Global Navigation Satellite System (term specific to the satellite navigation
system operated by the Russian Federation)
Global Navigation Satellite system (general term used to refer to any satellite
navigation system)
International Association of Marine Aids to Navigation and Lighthouse
Authorities
Maritime Identification Digits
RS232Serial data communications standard - see TIA-232-F
RS422Serial data communications standard see TIA-422-B
SARTSearch And Rescue Transponder
SOLASSafety of Life at Sea
SDI-12Serial Data Interface at 1200 Baud
USBUniversal Serial Bus
UTCCoordinated Universal Time
VDLVHF Data Link
VHFVery High Frequency
VSWRVoltage Standing Wave Ratio
Page 5
Notices
!
This equipment must be installed in accordance with the instructions provided in this
manual. Failure to do so will seriously affect its performance and reliability. It is strongly
recommended that a trained technician installs and configures this product.
This equipment is intended as an aid to navigation and is not a replacement for proper
navigational judgement. Information provided by the equipment must not be relied upon as
accurate. User decisions based upon information provided by the equipment are done so
entirely at the users own risk.
!
!
The accuracy of a GNSS position fix is variable and affected by factors such as the antenna
positioning, how many satellites are used to determine a position and for how long satellite
information has been received.
!
2Notices
When reading this manual please pay particular attention to warnings marked with the
warning triangle symbol shown on the left. These are important messages for safety,
installation and usage of the transceiver.
2.1Safety warnings
2.2General notices
2.2.1Position source
All marine Automatic Identification System (AIS) transceivers utilise a satellite based location system such as
the Global Positioning Satellite (GPS) network. The general term for satellite based location systems is Global
Navigation Satellite System or GNSS. This manual refers to either GNSS or GPS depending on context.
2.2.2Product category
This product is categorised as 'exposed' in accordance with the definitions provided in IEC 60945.
2.2.3Disposal of the product and packaging
Please dispose of this product in accordance with the European WEEE Directive or with the applicable local
regulations for disposal of electrical equipment. Every effort has been made to ensure the packaging for the
product is recyclable. Please dispose of the packaging in an environmentally friendly manner.
2.2.4Accuracy of this manual
This manual is intended as a guide to the installation, setup and use of this product. Every effort has been made
to ensure the accuracy of this manual, however due to continuous product development this manual may not
be accurate in all respects, therefore no guarantee is offered. If you are in any doubt about any aspect of this
product, please contact your supplier.
The part number and revision number of this manual are shown on the lower right hand corner of the front
cover.
Page 6
Notices
2.3Regulatory information
2.3.1Declaration of conformity - R&TTE
We, SRT Marine System Solutions Ltd, of Wireless House, Westfield Industrial Estate, Midsomer Norton, Bath,
BA3 4BS declare under our own responsibility that the product Chronos AIS AtoN transceiver to which this
declaration refers conforms to the relevant sections of the following standards and / or other normative
documents.
For Article 3.1 (a) [Health & Safety]:
EN60950-1:2006/A2:2013, relevant sections not addressed by IEC60945:2002-08
IEC 60945:2002-08
For Article 3.1 (b) [EMC]:
IEC 60945:2002-08
For Article 3.2 [Spectrum usage]:
IEC62320-2:2008
IEC61108-1:2003-07
For Article 3.3 [Special requirements]:
IEC62320-2:2008
We, SRT Marine System Solutions Ltd, declare that all essential radio test suites have been carried out and
the above named product is in conformity with all essential requirements of Directive 1999/5/EC.
The conformity assessment procedure referred to in Article 10 and detailed in Annex [III] and [IV] of Directive
1999/5/EC has been followed with the involvement of the following Notified Body.
The technical documentation relevant to the above equipment will be held at:
SRT Marine Solutions Ltd, Wireless House, Westfield Industrial Estate, Midsomer Norton, Bath, BA3 4BS,
Name: Neil Peniket, Chief Operating Officer
Date: 26th January 2015
2.3.2CE Marking
The product carries the CE mark, notified body number and alert symbol as required by the R&TTE directive.
The product is intended for sale in the following member states:
Great Britain, France, Spain, Sweden, Austria, Netherlands, Portugal, Denmark, Norway, Belgium, Italy,
Restrictions of use: Some EU member states may require a licence to operate this equipment.
Page 7
Notices
2.3.3FCC and Industry Canada notices
A. FCC Part 15.19(a) statement:
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.
A. Part 15 Clause 15.105 [EMC Class A/B statement]:
Note: 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 reception, 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 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.
B. Part 15 Clause 15.21 [Do not modify warning]
Changes or modifications not expressly approved by the party responsible for compliance could void the user's
authority to operate the equipment.
C. RSS-Gen license-exempt notice:
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the
following two conditions: (1) this device may not cause interference, and (2) this device must accept any
interference, including interference that may cause undesired operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de
licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de
brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le
brouillage est susceptible d'en compromettre le fonctionnement.
D. RSS-Gen antenna notice:
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and
maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio
interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically
radiated power (e.i.r.p.) is not more than that necessary for successful communication.
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une
antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le
but de réduire les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type
d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente (p.i.r.e.) ne dépasse pas
l'intensité nécessaire à l'établissement d'une communication satisfaisante.
E. FCC & IC RF Exposure related information
RF Exposure Guidance: This equipment complies with FCC and Industry Canada radiation exposure limits set
forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance
20cm between the radiator and your body. This transmitter must not be co-located or operating in conjunction
with any other antenna or transmitter not described under this FCC ID and IC certification number, except in
accordance with FCC and Industry Canada multi-transmitter product procedures.
Guide d'Exposition RF : ce matériel est conforme aux normes FCC et Industrie Canada relatives aux limites
maximales d'exposition aux radiations en milieu non-contrôlé. Cet équipement doit être installé et opéré à une
distance de plus de 20cm entre la source de radiation et le corps de l'utilisateur. Cet émetteur ne peut être situé
à proximité de ou opérer conjointement avec tout autre émetteur ou toute antenne non-classifiés sous le
numéro de certification FCC ID et IC, sauf s'ils respectent la procédure FCC et Industrie Canada concernant
tout produit multi-émetteurs.
Page 8
Introduction
3Introduction
3.1About AIS
The marine Automatic Identification System (AIS) is a location and vessel information reporting system. It
allows vessels equipped with AIS to automatically and dynamically share and regularly update their position,
speed, course and other information such as vessel identity with similarly equipped vessels. Position is derived
from GNSS and communication between vessels is by Very High Frequency (VHF) digital transmissions.
There are a number of types of AIS device as follows:
● Class A transceivers. These are designed to be fitted to commercial vessels such as cargo ships
and large passenger vessels. Class A transceivers transmit at a higher VHF signal power than Class
B transceivers and therefore can be received by more distant vessels, they also transmit more
frequently. Class A transceivers are mandatory on all vessels over 300 gross tonnes on international
voyages and certain types of passenger vessels under the SOLAS mandate.
● Inland AIS stations. Similar to Class A transceivers with additional features for use on Inland
waterways.
● Class B transceivers. Similar to Class A transceivers in many ways, but are normally lower cost due
to the less stringent performance requirements. Class B transceivers transmit at a lower power and at
a lower reporting rate than Class A transceivers.
● AIS base stations. AIS base stations are used by Vessel Traffic Systems to monitor and control the
transmissions of AIS transceivers.
● Aids to Navigation (AtoN) transceivers. AIS AtoNs are transceivers mounted on buoys or other
hazards to shipping which transmit details of their location to the surrounding vessels.
● AIS receivers. AIS receivers receive transmissions from Class A transceivers, Class B transceivers,
AIS AtoNs and AIS base stations but do not transmit any information about the vessel on which they
are installed.
This product is an AIS Aid to Navigation (AtoN) transceiver.
Figure 1The AIS network
Page 9
Introduction
3.2System overview
This AIS AtoN is a self contained device supporting both Type 1 (transmit only) and Type 3 (transmit and
receive) operation. It is primarily designed for installation in enclosed environments such as buoy equipment
cabinets on physical AtoN structures. The AIS AtoN transceiver can be supplied with an optional Sensor
Interface which interfaces to sensors (such as weather instruments) and transmits measured data via AIS
messages to surrounding vessels and shore stations.
The AIS AtoN has an exceptionally low power consumption making it suitable for installation on floating Aids
to Navigation with solar charged power systems. The lowest power consumption is achieved when operating
as a Type 1 AIS AtoN transmitting only position information. Further description of Type 1 and Type 3 operation
is provided below.
Figure 2Typical AIS AtoN system
3.2.1Type 1 AIS AtoN
A Type 1 AIS AtoN is a transmit only device using the FATDMA (Fixed Access Time Division Multiple Access)
access scheme. This requires that the AIS AtoN is configured with fixed AIS time slots in which it will transmit
AIS messages. Mobile AIS stations operating in the area where a Type 1 AIS AtoN is installed need to be aware
of the time slots allocated to the AIS AtoN. The slots allocated to the AIS AtoN are 'reserved' by AIS Base
Station transmissions covering the area in which the AIS AtoN is installed.
This mode of operation therefore requires that an AIS base station is operating in the same area as the AIS
AtoN and is configured to make the necessary slot reservations.
3.2.2Type 3 AIS AtoN
A Type 3 AIS AtoN has transmit and receive capability and can therefore use either the FATDMA or RATDMA
(Random Access Time Division Multiple Access) access schemes. The RATDMA scheme allows the AIS AtoN
to internally allocate slots for transmission of AIS messages without reservation from an AIS Base Station.
AIS receive capability also allows a Type 3 AIS AtoN to be configured and queried for status via AIS messages
sent from a shore station (known as VDL configuration). An extension of VDL configuration is 'Chaining' where
configuration and query commands are passed along a 'chain' of AIS AtoN stations to a distant station beyond
the range of direct communication with a shore station.
Page 10
3.3Supported AIS messages
The transceiver supports the following AIS message types.
Introduction
ITU-R
M.1371-4
Message
number
6Binary addressed message
7Binary acknowledge message
8Binary broadcast messageTransmitted
12
Description
Addressed safety related
message
Transmitted /
Received by
AtoN
Transceiver
Transmitted
and received
Transmitted
and received
Transmitted
Application
The transceiver uses message 6 to send
binary data (relating to connected
sensors and systems) to a specific shore
station. The transceiver can also receive
addressed binary messages for the
purpose of configuration and control.
This message is transmitted to
acknowledge receipt of a binary
message. The transceiver can also
receive acknowledgements relating to its
own addressed binary transmissions.
The transceiver uses message 8 to
broadcast binary data (relating to
connected sensors and systems) to all
other AIS stations in range.
The transceiver can be configured to
transmit an addressed safety related
message to a specific shore station to
alert the operator to an off position,
vessel proximity or built in test failure
condition.
13
14
Acknowledgement of received
addressed safety related
message
Safety related broadcast
message
Received
Transmitted
The transceiver receives message 13 in
acknowledgement of its transmission of
message 12.
The transceiver can be configured to
transmit a broadcast safety related
message to all AIS stations in range to
warn of an off position, vessel proximity
or built in test failure condition.
Page 11
Introduction
ITU-R
M.1371-4
Message
number
20Data link management messageReceived
21Aids to Navigation reportTransmitted
25Single slot binary message
Description
Transmitted /
Received by
AtoN
Transceiver
Transmitted
and received
Application
When operating as a Type 3 transceiver
slot reservations made by a shore
station using message 20 will be
observed by the transceiver.
This is the primary message transmitted
by the transceiver. It contains the
position, identification and status of the
transceiver.
This message can be used for remote
(over the air) configuration of the
transceiver and configuration of a ‘chain’
of transceivers.
Page 12
AIS AtoN product variants
A system of icons is used throughout this manual to highlight which AIS AtoN configurations
a particular section, paragraph or illustration applies to. Sections without any icons apply to
all configurations.
!
3S
4AIS AtoN product variants
The AIS AtoN transceiver can be operated with or without connection to the optional Sensor Interface product
which is available to purchase separately.
The AIS AtoN transceiver can be configured to operate as either type 1 or type 3 either with or without
connection to the Sensor Interface.
Type 1 AIS AtoN transceiver without Sensor Interface
Type 1 AIS AtoN transceiver with Sensor Interface
Type 3 AIS AtoN transceiver without Sensor Interface
Type 3 AIS AtoN transceiver with Sensor Interface
Installation of an AIS AtoN transceiver without connection to a Sensor Interface will limit the functionality of the
installation to transmission of AIS message 21 including the following information:
● Name of AtoN
● Position of AtoN
● Status of AtoN (including AtoN health, Light health and status and RACON status)
Installation without connection to a Sensor Interface is recommended when their is limited power availability
and no requirement for the AIS AtoN to broadcast other information such as meteorological or hydrological
data.
When the AIS AtoN transceiver is installed with a Sensor Interface the capability is extended to enable the
broadcasting of data from connected sensors and systems. However the power consumption of the combined
AIS AtoN transceiver and Sensor Interface will be higher and therefore suited to an installation where power
consumption is less critical.
1
1S
3
Page 13
Installation
AIS AtoN
Transceiver
VHF antenna
GPS antenna
Light (optional)
RACON (optional)
12/24V DC supply
PC (Conguration only)
Earth bond
Other sensors and
monitoring equipment
(optional)
AIS AtoN
Transceiver
VHF antenna
GPS antenna
Light (optional)
RACON (optional)
12/24V DC supply
PC (Conguration only)
Sensor
Interface
Earth bond
5Installation
1
1S
3
3S
The AIS AtoN transceiver has been designed for ease of installation. The transceiver is self contained requiring
only an external VHF antenna, GPS antenna and power source for a basic installation. A typical system and
connection diagram is provided in
Figure 3. The AIS AtoN transceiver can be connected to a Sensor Interface
when a more extensive range of sensors and external devices are required as part of the AIS AtoN installation.
Figure 4 shows a typical installation with a Sensor Interface included.
Figure 3Typical AIS AtoN transceiver system connections
Figure 4Typical AIS AtoN transceiver and Sensor Interface system con nections
The main installation and commissioning steps are:
1. Mount the Transceiver in a suitable location on the physical Aid to Navigation.
2. Install a VHF antenna according to the manufacturers instructions.
3. Install the supplied GNSS antenna.
4. Connect any sensor interfaces and light / RACON monitoring signals.
5. Connect power to the AIS AtoN transceiver and optional Sensor Interface.
6. Configure and commission the AIS AtoN transceiver and optional Sensor Interface via USB (note that
this step can be carried out on shore prior to installation in a remote location).
Page 14
Installation
Power and USB cable
Backshell
connector
AIS AtoN Transceiver
Product CD
GPS antenna
USB conguration cable
Quick Start
Guide
Fixings
5.1What’s in the box (AIS AtoN transceiver)
1
3
Figure 5 shows the items included with the AIS AtoN transceiver. The following section gives a brief overview
of each item. Please ensure all items are present and if any are missing please contact your supplier.
Figure 5What’s in the box (AIS AtoN transceiver)
● AIS AtoN transceiver - The AIS AtoN transceiver unit.
● Fixings - Fixing screws for mounting the transceiver to the physical AtoN structure and for connection
of the earth stud to a suitable earth point.
● Power and USB cable - Cable for connection of power and USB.
● USB configuration cable - USB cable for connection to a PC when configuring the transceiver. This
cable mates with the Power and USB cable.
● Support tools CD - CD containing the product manual, transceiver PC configuration and diagnostic
tools (proAtoN).
● Quick Start Guide - A brief introduction to installation and configuration of the AIS AtoN transceiver.
● Backshell connector - Connectors required for making connection to the sensor interfaces as
described in section
6.1.2.
● GPS antenna - GPS antenna and 10m cable.
Page 15
Installation
1S
Quick Start
Guide
Sensor Interface
Product CD
Link cable
Fixings
Backshell
connectors (x2)
USB conguration cable
5.2What’s in the box (Sensor Interface)
3S
Figure 5 shows the typical items included with the optional Sensor Interface. The following section gives a brief
overview of each item. Please ensure all items are present and if any are missing please contact your supplier.
Figure 6What’s in the box (Sensor Interface)
● Sensor Interface - The Sensor Interface unit.
● Fixings - Fixing screws for mounting the Sensor Interface to the physical AtoN structure.
● Link cable - Cable for connection of the Sensor Interface to the AIS AtoN transceiver as defined in
section
6.
● USB configuration cable - USB cable for connection to a PC when configuring the Sensor Interface.
● Support tools CD - CD containing the product manual, transceiver PC configuration and diagnostic
tools (proAtoN).
● Quick Start Guide - A brief introduction to installation and configuration of the Sensor Interface.
● Backshell connectors - Connectors required for making connection to the sensor interfaces as
described in section
7.2.
Page 16
Installation
5.3Preparing for installation
In addition to the items provided with the AIS AtoN transceiver and Sensor Interface the following items will be
required to complete the installation.
5.3.1Tools and wiring accessories
The following tools and wiring accessories are required for installation:
● Posidriv screwdriver (size PZ2).
● M4 spanner.
● Soldering equipment for wiring of the connectors included (only required if external sensors are
required).
● Suitable multi-core cable for connection of sensor devices via the included backshell connector. The
cable should have a minimum outer diameter of 6.5mm and a maximum outer dimension of 9.5mm. It
is important to select cable which meets this criteria to ensure the assembled cable and connector is
waterproof. Please contact your supplier for recommendations of suitable cable.
● Self amalgamating tape for use with the VHF and GPS connections.
● A mounting pole with a one inch (1”) 14 TPI thread and fixings to screw the supplied GPS antenna
onto.
5.3.2VHF antenna and cable
Connection of a suitable VHF antenna will be required for the AIS AtoN transceiver to operate. A robust marine
band VHF antenna suited to the environment in which the AtoN will operate should be selected. The antenna
cable should be terminated with a male N type connector. Any joins in the antenna cable should be made with
co-axial connectors and sealed appropriately. It is recommended that RG-213 cable (or equivalent) is used to
connect the VHF antenna. See section
Suggested models are:
● Shakespeare MD-70
● AC Marine CX4AIS, CELmar0-1AIS, CELmar1-1AIS
● Procomm CXL 2-3LW/hm, CXL 2-1/h-N
5.3.3PC for configuration
A PC running Windows XP/Vista/7 with at least one USB port is required for configuration of the AIS AtoN
transceiver and Sensor Interface.
7 for further details.
Page 17
Installation
The supplied link cable which connects the AIS AtoN transceiver to the Sensor Interface is
0.5m in length. When using the optional Sensor Interface it is important to locate the Sensor
Interface unit and AIS AtoN transceiver unit close enough for the cable to reach between the
relevant connectors without stressing the cable.
!
5.4Mounting the AIS AtoN transceiver and Sensor Interface
The AIS AtoN transceiver and optional Sensor Interface can be mounted to a physical aid to navigation using
supplied fixing screws, washers and nuts. The screws are inserted through the four mounting holes on the
product. Refer to
dimensions for the AIS AtoN transceiver are provided in Figure 31 and for the Sensor Interface in Figure 32.
Consideration should be given to cable routing and VHF and GNSS antenna location when selecting an
installation location.
Figure 7 for guidance on mounting the AIS AtoN transceiver and Sensor Interface. Overall
Figure 7Mounting the AIS AtoN transceiver and Sensor Interface
Page 18
Transceiver and Sensor Interface connections
The supplied sealing cap must be fitted to all unused connections.
!
Link
Power/USB
GPS antenna
VHF antenna
Earth stud
Power connections should be kept as short as possible in order to minimise any reduction in
voltage at the product power supply interface. Cable used to connect power to the supplied
power cable should have conductors with a minimum cross sectional area of 0.75mm
2
.
!
When the Link connector is used to connect to the Sensor Interface it cannot be used to
connect direct to a light and/or RACON. In this configuration such connections should be
made via the Sensor Interface.
!
6Transceiver and Sensor Interface connections
6.1AIS AtoN transceiver connections
The function of each connector is identified in Figure 8.
1
1S
3
3S
Figure 8Transceiver connector locations
6.1.1Power and USB connector
This connector provides power to the transceiver along with access to the USB port for configuration. To
connect to the AIS AtoN transceiver via USB the USB accessory cable must be connected to the Power/USB
accessory cable. When configuration is complete the USB accessory cable can be disconnected and the
supplied sealing cap fitted to the USB connector on the Power/USB accessory cable.
The transceiver requires a nominal 12VDC or 24VDC supply and will operate between 9.6VDC and 32.6VDC.
The peak current drawn when operating from 12VDC is 3A and when operating from 24VDC is 1.5A. Power
should be connected using the supplied interface connector and cable. It is recommended that 5A rated fuses
are installed in line with the power supply positive and negative connections.
Overall power consumption is dependent on the configuration of the AIS AtoN transceiver messaging and
whether a Sensor Interface is in use. Minimum power consumption figures are provided in section
6.1.218 way Link connector
The 18 way Link connector has two functions, only one of which can be used at any time:
1. To provide connection to a Light, RACON and an external NMEA0183 port.
2. To connect to the Sensor Interface via the Link cable supplied with the Sensor Interface.
1
1
1S
1S
3
3
3S
12.
3S
Page 19
Transceiver and Sensor Interface connections
3
The cable should have a minimum outer diameter of 6.5mm and a maximum outer dimension
of 9.5mm. It is important to select cable which meets this criteria to ensure the assembled
cable and connector is waterproof. Please contact your supplier for recommendations of
suitable cable.
!
12
3
7
12
16
4
8
13
17
5
9
14
6
10 11
15
18
6.1.3Using the 18 way link connector for direct connection of external equipment
1
When using the Link connector to connect to a Light and/or RACON, the supplied backshell connector should
be wired to suitable cable of the required length.
Figure 9 shows the pin numbering and assembly method for
the supplied backshell connector and Table 1 shows the corresponding pin functions.
Figure 9Pin numbering for the 18 way Lin k connector
PinSignal nameFunction and notes
1N/CDo not use
2N/CDo not use
3NMEA0183_TX1_AConnection A of the NMEA0183 TX1 port
4NMEA0183_RX1_AConnection A of the NMEA0183 RX1 port
5NMEA0183_TX1_BConnection B of the NMEA0183 TX1 port
6NMEA0183_RX1_BConnection B of the NMEA0183 RX1 port
7NMEA0183 GNDGround reference for the NMEA0183 port
8LIGHT_PWR+Positive ON/OFF connection to an external light
9LIGHT_PWR-Negative ON/OFF connection to an external light
10LIGHT_HEALTH+Positive power connection to an external light health status
11LIGHT_HEALTH-Negative power connection to an external light health status
12RACON_STATUS+Positive status connection to an external RACON
13RACON_STATUS-Negative status connection to an external RACON
14N/CDo not use
Page 20
Transceiver and Sensor Interface connections
It is essential that the AIS AtoN transceiver be connected to a local earth point via the earth
stud on the VHF connector.
!
The performance and reliability of the VHF antenna is essential to correct operation of the
transceiver. Ensure that a high quality antenna suitable for use in harsh environmental
conditions is selected. Ensure all co-axial connections are well made and watertight.
!
The VHF antenna should be installed according to the manufacturer's instructions.
!
The VHF antenna must be installed with at least 1 metre horizontal separation from any other
VHF antenna mounted at the same level.
!
PinSignal nameFunction and notes
15N/CDo not use
16N/CDo not use
17N/CDo not use
18N/CDo not use
Table 1Pin numbers and functions for the supplied 18 way backshell connector
6.1.4VHF antenna connector
The VHF antenna connector is a female 'N' type co-axial connector. The antenna ground is galvanically
isolated from the AIS AtoN system ground. The connector and mating half must be sealed with self
amalgamating tape once mated. A lightning protector may be installed in line with the VHF antenna connector.
The recommended lightning protector is Huber+Suhner part number 3401.17.C with gas discharge tube
9071.99.0547.
The VHF antenna should have the following specification:
● Centre frequency 159~162MHz
● VSWR < 2.0
● Impedance 50 Ohms
● Power handling 12.5 Watts
● Gain 3dBi or better
It is recommended that high quality RG213 or RG214 co-axial cable is used to connect the VHF antenna to the
transceiver. The antenna cable should be as short as possible and no more than 30 metres (100 feet) in length.
6.1.5GNSS antenna connector
The GNSS antenna connector is a female 'TNC' co-axial connector. The connector and mating half must be
sealed with self amalgamating tape once mated.
When installing the supplied GNSS antenna:
● Make sure the antenna has a clear view of the sky with no overhead obstructions.
● Position the antenna as far as possible from any VHF or other transmitting antennas.
● Position the antenna as high as possible on the physical aid to navigation.
Page 21
Transceiver and Sensor Interface connections
Link
Sensor 2
Sensor 1
USB
6.1.6Earth connection stud
The earth connection stud is a M5 stud connected to the VHF antenna ground. This point should be connected
to a common grounding point for lightning protection using the supplied crimp terminal, nut and washer.
6.2Sensor Interface connections
The function of each connector is shown in Figure 10.
Figure 10 Sensor Interface connections
6.2.1USB connector
The USB connector is used solely to connect the Sensor Interface to a PC for configuration using the supplied
USB accessory cable.
6.2.2Sensor 1 connector
The Sensor 1 connector can be used to connect sensors and systems to the Sensor Interface. Further details
can be found in section
7.2.
6.2.3Sensor 2 connector
The Sensor 2 connector can be used to connect sensors and systems to the Sensor Interface. Further details
can be found in section
7.2.
6.2.4Link connector
The Link connector is used solely to connect the Sensor Interface to the AIS AtoN transceiver via the supplied
Link cable accessory.
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