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HD Digital Rad ome
Trademarks and registered trademarks
Autohelm, HSB, RayTech Navigator, Sail Pilot, SeaTalk and Sportpilot are UK registered trademarks of Raymarine UK Limited.
Pathfinder and Raymarine are UK registered trademarks of Raymarine Holdings Limited. 45STV, 60STV, AST, Autoadapt, Auto GST,
AutoSeastate, AutoTrim, Bidata, G Series, HDFI, LifeTag, Marine Intelligence, Maxiview, On Board, Raychart, Raynav, Raypilot,
RayTalk, Raystar, ST40, ST60+, Seaclutter, Smart Route, Tridata, UniControl, Hybridtouch, and Waypoint Navigation are trademarks of
Raymarine UK Limited.
All other product names are trademarks or registered trademarks of their respective owners.
Copyright ©2009 Raymarine UK Ltd. All rights reserved.
Document number: 81318-2
Date: 07 2009
Chapter 1 Important Information............................. 7
Introduction .................................................................... 7
Transmitted power density levels ..................................... 7
IMO and SOLAS............................................................. 7
Radar licensing............................................................... 7
FCC Notice - Radar ........................................................ 8
EMC conformance .......................................................... 8
Product disposal ............................................................. 8
Display compatibility ....................................................... 8
Warranty registration....................................................... 9
Technical accuracy ......................................................... 9
Chapter 2 Installation ............................................... 11
2.1 Planning ................................................................... 12
2.2 Installation procedures .............................................. 18
2.3 Post installation procedures ....................................... 25
Chapter 3 Maintenance & troubleshooting ............ 27
3.1 Safety ...................................................................... 28
3.2 Maintenance ............................................................. 28
3.3 Troubleshooting ........................................................ 29
3.4 Raymarine technical support...................................... 30
Chapter 4 Technical specification........................... 31
6 HD Digital Radome User's Guide
Chapter 1: Important Information Warning: Radio Frequency Radiation
Warning: Product installation and
The radar scanner transmits electromagnetic energy
operation at microwave frequencies which can be harmful,
This product must be installed and operated in particularly to the eyes. Do NOT look at the antenna
accordance with the Raymarine instructions provided. from close range. Ensure personnel are clear of the
Failure to do so could result in personal injury, damage radome when the radar is turned on.
to your boat and/or poor product performance. It is recommended that the radar is installed out of
range of personnel, e.g. above head height.
This user guide describes how to install, connect and maintain your
Transmitted power density levels
HD Digital Radome Antenna. The models covered are: · A power density level of 10 W/m2 is likely at distances of 1 m
· RD418HD - 18" 4 kW Digital Radome Antenna. or less from the radome.
· RD424HD - 24" 4 kW Digital Radome Antenna. · A power density level of 100 W/m2 does not occur at any point.
When properly installed and operated, the use of this radar
IMO and SOLAS
· IEEE C95.1 - 2005 - Standard for Safety Levels with respect to
Human Exposure to Radio Frequency Electromagnetic Fields, The equipment described within this document is intended for use
3 kHz to 300 GHz. on leisure marine boats and workboats not covered by International
· ICNIRP Guidelines 1998 - International Commission on Maritime Organization (IMO) and Safety of Life at Sea (SOLAS)
Non-Ionising Radiation Protection: Guidelines for limiting Carriage Regulations.
exposure to time-varying electric, magnetic and electro-magnetic
fields (up to 300 GHz) 1998.
The HD Digital Radome Antenna is designed and manufactured to Radar licensing
meet the rigorous demands of the marine environment. However,
it must be installed, operated and maintained properly. Please Installation and operation of this radar may be subject to individual
carefully read and follow the recommended procedures in this user licensing of the equipment, operator or vessel. You are strongly
guide. advised to check with the requirements of the licensing authority of
Important Information 7
your national administration. In case of any difficulties, contact your Product disposal
local Raymarine dealer.
Dispose of this product in accordance with the WEEE Directive.
Warning: High voltages
This product contains high voltages. Do NOT remove
any covers or otherwise attempt to access internal The Waste Electrical and Electronic Equipment (WEEE)
components, unless specifically instructed in this Directive requires the recycling of waste electrical and electronic
document. equipment. Whilst the WEEE Directive does not apply to some
Raymarine products, we support its policy and ask you to be aware
of how to dispose of this product.
Warning: Product installation and
This product must be installed and operated in Display compatibility
accordance with the Raymarine instructions provided.
Failure to do so could result in personal injury, damage The HD Digital Radome Antenna can be connected to Raymarine
to your boat and/or poor product performance. multi-function displays (MFDs) as follows:
· Direct connection to E-Series and to wide screen versions of
FCC Notice - Radar · Connection via a Raymarine SeaTalkhs switch to:
Changes or modifications to this equipment not expressly approved Wide screen versions of C-Series MFDs.
in writing by Raymarine Incorporated could violate compliance All versions of E-series MFDs.
with FCC rules and void the operator's authority to operate the
equipment. All versions of G-series MFDs.
Note: Some limitations of functionality in the above systems may
occur, depending on the software status.
Raymarine equipment and accessories conform to the appropriate Display software
Electromagnetic Compatibility (EMC) regulations for use in the
recreational marine environment. After fitting an HD Digital Radome Antenna, i.e. before it is used,
you must ensure that any associated multi-function display (MFD),
Correct installation is required to ensure that EMC performance is is using the latest software version.
8 HD Digital Radome User's Guide
To check the MFD software version, switch on the MFD and check
the version number on the navigation warning screen. Note that if a
scanner is not connected, the version number will only be displayed
for 10 seconds.
You can download the latest MFD software, from the Raymarine
website, at www.raymarine.com. Information on how to use the
download to update the MFD software, is also available on the
Raymarine website. Additional support information is available from
Raymarine technical support.
To register your HD Digital Radome Antenna ownership, please take
a few minutes to fill out the warranty registration card found in the
box, or visit www.raymarine.com and register on-line.
It is important that you register your product to receive full warranty
benefits. Your unit package includes a bar code label indicating the
serial number of the unit. You should stick this label to the warranty
To the best of our knowledge, the information in this document was
correct at the time it was produced. However, Raymarine cannot
accept liability for any inaccuracies or omissions it may contain. In
addition, our policy of continuous product improvement may change
specifications without notice. As a result, Raymarine cannot accept
liability for any differences between the product and this document.
Important Information 9
10 HD Digital Radome User's Guide
Chapter 2 Installation
· 2.1 Planning on page 12
· 2.2 Installation procedures on page 18
· 2.3 Post installation procedures on page 25
2.1 Planning · The product is supplied from a separate battery from that used
for engine start. This is important to prevent erratic behavior
Warning: Product grounding and data loss which can occur if the engine start does not have
a separate battery.
Before applying power to this product, ensure it has
· Raymarine specified cables are used.
been correctly grounded, in accordance with the
instructions in this guide. · Cables are not cut or extended, unless doing so is detailed in
the installation manual.
Caution: Do NOT connect to positive Note: Where constraints on the installation prevent any of
ground system the above recommendations, always ensure the maximum
possible separation between different items of electrical
Do NOT connect this product to a equipment, to provide the best conditions for EMC performance
positively-grounded system. throughout the installation
EMC installation guidelines Parts Supplied
Raymarine equipment and accessories conform to the appropriate Check that you have been supplied with the following parts:
Electromagnetic Compatibility (EMC) regulations, to minimize
electromagnetic interference between equipment and minimize the
effect such interference could have on the performance of your
Correct installation is required to ensure that EMC performance is
Center Line of Radome
For optimum EMC performance we recommend that wherever RadomeAntenna Drill 4 holes, 10 mm diameter
(18'' and 24'' Radomes)
Center Line of Radome
· Raymarine equipment and cables connected to it are:
M8 bolt (x4) Spring Flat
At least 1 m (3 ft) from any equipment transmitting or cables washer (x4) washer (x4) 233 mm
carrying radio signals e.g. VHF radios, cables and antennas. Forward
In the case of SSB radios, the distance should be increased
to 7 ft (2 m). 18'' or 24'' Radome Mounting Template
Artwork Number 3032-866-B
More than 2 m (7 ft) from the path of a radar beam. A radar Denso Paste Installation template
beam can normally be assumed to spread 20 degrees above D11693-1
and below the radiating element.
12 HD Digital Radome User's Guide
Items Required Dimensions - 18 inch antenna
247 mm (9.7 in)
3 mm drill bit 10 mm drill bit
346 mm (13.62 in)
521 mm (20.5 in)
Drill Adhesive tape diameter
13 mm socket Torque wrench
Dimensions - 24 inch antenna
247 mm (9.7 in)
346 mm (13.62 in)
652 mm (25.67 in)
The antenna must also be mounted where it is:
· Above head height.
· Easily accessible.
· As near as possible to the boat's centerline.
(5.57 in) D11695-1 · On a rigid and stable platform, capable of securely supporting the
antenna under seagoing conditions.
· Clear of large objects such as the flybridge, large engine stacks,
searchlights, horns, masts etc.
· Clear of heat and fumes.
The optimum height for the HD Digital Radome Antenna (the
antenna) is a location that is high enough above the waterline to · At least 1 m (3.3 ft) from a magnetic compass or other antennae.
give a long range line-of-sight to the horizon, but not so high as to
be adversely affected by the boat's pitching and rolling. Antenna Mounting Angle
The radar beam from the HD Digital Radome Antenna is
approximately 25° wide in the vertical direction, to give good target
detection even when your boat pitches and rolls.
14 HD Digital Radome User's Guide
To power supply
To HD Digital Radome
The following digital cables are available:
Cable length Part number
Always mount the HD Digital Radome Antenna so that the scanner
rotates parallel to the water line. 5 m (16 ft 5 in) A55076D
Planing hull boats and some displacement hull boats adopt a higher 10 m (32ft 9 in) ft) A55077D
bow angle when the boat is at cruising speed, so on these boats
it may be necessary to shim the rear of the HD Digital Radome 15 m (46 ft) A55078D
Antenna, to compensate for the bow rise and ensure optimum 25 m A55079D
target detection. The amount of shimming should be such that
when the bow rises at cruising speed, the radar beam rotation is in The following extension cables are available:
the horizontal plane,
Extension length Part number
2.5 m (8 ft 2 in) A92141D
5 m (16 ft 5 in) A55080D
10 m (32ft 9 in) ft) A55081D
washers Important: Use only standard Raymarine cables. Do NOT make
D11360-1 your own cables for use with the HD Digital Radome Antenna.
Cables Mast Mounting
If the HD Digital Radome Antenna is mounted on a hollow mast, the
You need a digital cable, to connect both power and SeaTalkhs to
cable may be run inside the mast for connection to the unit.
the HD Digital Radome Antenna.
If you run the cable up a mast, take the appropriate measures to:
· Prevent the cable chafing where it enters and exits the mast. · In a 24 V system, protect the power supply with either a 5 A
thermal breaker, or an 8 A fuse.
· Minimize electrical interference by:
Not running the cable near other electrical equipment. Power cable lengths
Not running the cable alongside power cables or antenna The total permitted lengths of power conductor run (i.e. power cable
cables for other equipment. plus cable extension) from the power source to the HD Digital
Radome Antenna are :
Power requirement · for 12 V systems, 20 m (65 ft)
The HD Digital Radome Antenna must be supplied with power by · for 24 V systems, 35 m (115 ft)
either a 12 V dc or a 24 V dc supply. Do NOT connect to a 32 V If you want to connect to a 12 V power system but a total power
system. conductor run of more than 20 m is necessary, the use of a suitable
If you are replacing an existing Radome scanner with an HD Digital voltage converter is recommended, to convert the 12 V supply
Radome Antenna, you must also replace any existing cable with the voltage to 24 V, and thus enable you to extend the run up to 35 m.
appropriate digital cable, as described in section 2.7 Cables. We recommend using a converter with a minimum 200 W output
If you connect to the power supply via an isolator switch, the
minimum switch rating is:
· For a 12 V system, 20 A.
These grounding requirements are applicable for Raymarine
· For a 24 V system, 15 A. equipment supplied with a separate drain wire or screen.
Caution: Do NOT connect to positive · The product power cable drain conductor (screen) must be
ground system connected to a common ground point.
Do NOT connect this product to a · It is recommended that the common ground point is a bonded
positively-grounded system. ground, i.e. with the ground point connected to battery negative,
and situated as close as possible to the battery negative terminal.
If a bonded ground system is not possible, a non-bonded RF
Power Supply Protection ground may be used.
The power supply must be protected by a suitable thermal circuit
breaker or fuse, fitted close to the power source. The protection
requirements are the same for both 18" and 24" HD Digital Radome
Antennae, and are as follows:
· In a 12 V system, protect the power supply with either a 10 A
thermal breaker, or a 15 A fuse.
16 HD Digital Radome User's Guide
Bonded ground system (preferred) Implementation
If several items require grounding, they may first be connected
to a single local point (e.g. within a switch panel), with this point
connected via a single, appropriately-rated conductor, to the boat's
common ground. The preferred minimum requirement for the path
to ground (bonded or non-bonded) is via a flat tinned copper braid,
with a 30 A rating (1/4 inch) or greater. If this is not possible, an
equivalent stranded wire conductor maybe used, rated as follows:
· for runs of <1 m (3 ft), use 6 mm2 (#10 AWG) or greater.
· for runs of >1 m (3 ft), use 8 mm2 (#8 AWG) or greater.
1 2 3 4
In any grounding system, always keep the length of connecting
braid or wires as short as possible.
RF ground system (alternative) Important: Do NOT connect this product to a positively-grounded
· BMEA code of practice
· NMEA 0400
1 2 3 4
1. Power cable to product
2. Drain (screen)
3. Bonded (preferred) or non-bonded RF ground.
2.2 Installation procedures
Vie w from above
Use the following procedures to install the HD Digital Radome
Antenna (the antenna):
· Mounting the antenna.
· Connecting to your system.
· Post installation procedures.
Caution: Mounting Bolts
Dri ' a
Do NOT screw the antenna mounting bolts into the
2 & 3
antenna base more than 25 mm (1 inch), or damage
to the antenna could occur. If necessary, use
shims or extra washers to prevent this happening. 1
Mounting the Antenna
Use a mounting location that: 1. Tape template to mounting IMPORTANT
platform. Ensure mountingplatform is
· Is robust enough to support the HD Digital Radome Antenna, 2. Drill 3 mm pilot holes in 4 positions
. adequately robust for this
under seagoing conditions. 3. Drill out the pilot holes to installation.
10 mmdiameter .
· Meets the requirements described under Antenna Position
2. Place the HD Digital Radome Antenna in position. If you are
Then: fitting it on a planing vessel, shim the rear of the antenna, so that
1. Prepare the mounting platform as in the following illustration. the beam points slightly down in the forward direction when the
boat is at rest, to compensate for the bow rising at cruising speed
18 HD Digital Radome User's Guide
non-planing boat FORWARD
planing boat (typical
planing angle shown)
Vie w from underneath
3. Lightly coat the threads of the four mounting bolts, with the
Denso Paste provided.
5. Tighten the bolts to a torque of 20 Nm (177 lbf/inch).
4. Ensuring that the bolts do not enter the antenna base more than
25 mm (1 inch), secure the antenna with the 4 bolts flat washers
and spring washers provided, as illustrated. If necessary, use Connecting
appropriate shims or extra washers to limit the length of bolt
When connecting your HD Digital Radome Antenna, use the
entering the antenna base.
instructions given here and also refer to the installation instructions
for the multi-function display (MFD) to which you are connecting.
Run the digital cable from the HD Digital Radome Antenna to the · Where a cable passes through an exposed bulkhead or deckhead,
signal and power connection points: use a suitable watertight feed-through.
· Run the signal connector to the appropriate MFD. · Do NOT run cables near to engines or fluorescent lights.
· Run the power cable to a suitable 12 V or 24 V connection point Always route data cables as far away as possible from:
on the boat's power system. We recommend connection is made
at the boats power distribution panel, wherever possible. · other equipment and cables,
· high current carrying ac and dc power lines,
Caution: Pulling cables
Do NOT use cords or ropes, attached to cable
connectors, to pull cables through restricted Connecting antenna
apertures (e.g. as in bulkheads), as this could
Ensuring that the arrow on the digital cable connector is aligned
cause damage to cables.
with the red triangular mark on the HD Digital Radome Antenna
connector, connect the digital cable to the connector on the HD
Routing cables Digital Radome Antenna, and fully hand-tighten. Do NOT use a
Cables must be routed correctly, to maximize performance and wrench or any other tool.
prolong cable life.
· Do NOT bend cables excessively. Wherever possible, ensure a
minimum bend radius of 100 mm.
Minimum bend Note: If the antenna connector is disconnected after initial
200 mm (8 in) installation, we recommend that before reconnecting, you lightly
diameter coat the connector thread with Renolit Aqua 2 Calcium grease.
Minimum bend of cable
100 mm (4 in) radius
Referring to the connection information for the multi-function display
(MFD) to which you are connecting, and to the Typical systems
· Protect all cables from physical damage and exposure to heat. diagrams given here, connect the digital cable signal connector
Use trunking or conduit where possible. Do NOT run cables to the appropriate MFD.
through bilges or doorways, or close to moving or hot objects.
· Secure cables in place using tie-wraps or lacing twine. Coil any
extra cable and tie it out of the way.
20 HD Digital Radome User's Guide
Direct connection to display
HD Digital Radome
Power cable To 12V/24V supply
via thermal breaker or fuse
Connection to networked displays (non G-series)
HD Digital Radome
Power cable To 12V/24V supply
via thermal breaker or fuse
22 HD Digital Radome User's Guide
Connection to G-Series Display
HD Digital Radome
(in UP position)
Power cable To 12V/24V supply
via thermal breaker or fuse
+VE bar -VE bar
When connecting power, refer to the Planning section and:
· Ensure that the total length of power cable will not exceed the Where possible, connect individual items of
maximum length, as described under Power cable lengths. equipment to individual circuit breakers.
· Connect power only via the correct value thermal breaker or fuse, Where this not possible, use individual in-line
as described under Power Supply Protection. fuses to provide the necessary protection.
Caution: Do NOT connect to positive Circuit breaker
Do NOT connect this product to a
Connect the power cable part of the digital cable to either a 12 V or
24 V dc supply, as follows:
1. Red wire to the supply +ve, either at the output of the battery
isolator switch or at a dc distribution panel.
2. Black wire to battery negative.
3. Drain connection (screen) to the common ground point (see
Sharing a breaker
Where more than 1 piece of equipment shares a breaker you must
provide protection for the individual circuits. E.g. by connecting an
in-line fuse for each power circuit.
24 HD Digital Radome User's Guide
2.3 Post installation procedures · change the default language settings.
4. Ensure that all personnel are clear of the antenna, then switch
Before using the product, carry out the following:
to transmit mode.
· Mechanical checks. 5. Carry out the radar operations described in the relevant MFD
· Switch on and initial setup. Owner's Handbook and check that all functions appear to be
6. Check the bearing alignment to ensure that targets appear
Mechanical checks at their correct bearing relative to the boat's bow. Adjust the
Before switching on the HD Digital Radome Antenna: alignment as necessary
7. Check the display timing before using the system for navigation.
· Ensure that:
All securing bolts are fully tightened and the appropriate Checking for interference
mechanical locking washers are in place.
Post installation check
All connections are securely made.
If you have installed any system aboard a boat or made other
All connecting cables and wires are secured and protected as
changes to the boat's electronic systems (radar, VHF radio etc.),
you need to check before casting off, that all electrical systems
· Ask your local Raymarine authorized installer to check the operate satisfactorily without any undue electrical interference,
installation. in order to conform with Electro Magnetic Compatibility (EMC)
regulations. To do this:
Switch on & initial setup 1. Ensuring it is safe to do so, turn on all electronic systems aboard
Use the information given here in conjunction with the relevant
information in your multi-function display (MFD) documentation, to 2. Check that the electronic systems all operate satisfactorily.
switch on, and to carry out the initial checks and setup tasks.
1. Press and hold down the power key of your MFD until the unit
The magnetron warm-up sequence should then start. When the
warm-up is complete, the unit should enter standby mode.
2. Use the appropriate soft key on your MFD to power on the HD
Digital Radome Antenna.
3. If necessary, at the MFD:
· adjust the MFD brightness.
26 HD Digital Radome User's Guide
Chapter 3: Maintenance & troubleshooting
· 3.1 Safety on page 28
· 3.2 Maintenance on page 28
· 3.3 Troubleshooting on page 29
· 3.4 Raymarine technical support on page 30
Maintenance & troubleshooting 27
3.1 Safety 3.2 Maintenance
Warning: Do not remove covers Once a year:
Do not remove any cover from this product. There are 1. Remove one of the antenna-securing bolts and associated
no user serviceable parts inside. washers.
2. Clean the bolt and washers.
Warning: Switch off power 3. Use Denso paste to lightly re-grease the bolt thread.
Before commencing any maintenance task, switch off 4. Replace the bolt and associated washers.
all power to the product. 5. Repeat steps 1 to 5 for all antenna-securing bolts.
6. Tighten all antenna-securing bolts to a torque of
20 Nm (177 lbf/inch).
Periodically, carry out these other maintenance tasks:
· Ensure the antenna is firmly attached to the mounting surface
· Check that the cable connections are in good condition and
· Examine all cables for signs of chafing, cuts or other damage. If
the antenna connector shows any sign of corrosion:
1. Disconnect it.
2. Clean the connector.
3. Lightly re-coat the connector threads with Renolit Aqua 2
4. Reconnect and hand-tighten the connection until it is secure.
28 HD Digital Radome User's Guide
3.3 Troubleshooting Symptom Action
The troubleshooting information provides possible causes and If the HD Digital Radome Antenna is
corrective action required for common problems associated with connected to the multi-function display
marine electronics installations. (MFD) via a SeaTalkhs switch, ensure that:
All Raymarine products are, prior to packing and shipping, subjected · All relevant equipment is correctly
to comprehensive test and quality assurance programs. However, connected to the SeaTalkhs switch.
if you experience problems with the operation of your HD Digital
Radome Antenna, this section will help you to diagnose and correct · The SeaTalkhs switch power supply is
problems in order to restore normal operation. satisfactory.
If after referring to this section you are still having problems with your · The SeaTalkhs switch is in good
unit, please contact Raymarine Technical Support for further advice. condition.
· SeaTalkhs cables are securely connected
Troubleshooting procedure and in good condition.
Use the following table to identify problems and remedial actions. Displayed bearing is different to Carry out the bearing alignment procedure
the true bearing. described in the installation guide for the
Symptom Action relevant MFD.
No Data Source or No Scanner Ensure the digital cable is securely
message on display. connected at both ends and is in good
Ensure power supply thermal breaker
has not tripped or fuse has not blown. If
necessary, reset breaker or replace fuse
ONCE ONLY. If breaker keeps tripping or
fuse keeps blowing, contact Raymarine
technical support for assistance.
Ensure power supply maintains the correct
voltage when the system is switched on.
Ensure all products in the system have
the correct software. Contact Raymarine
technical support for assistance.
Maintenance & troubleshooting 29
3.4 Raymarine technical support
Raymarine provides a comprehensive customer support service, on
the world wide web, through our worldwide dealer network and by
telephone help line. If you are unable to resolve a problem, please
use any of these facilities to obtain additional help.
Please visit the customer support area of our website at:
This contains Frequently Asked Questions, servicing information,
e-mail access to the Raymarine Technical Support Department and
details of worldwide Raymarine agents.
In the USA call:
+1 603 881 5200 extension 2444
In the UK, Europe, the Middle East, or Far East call:
+44 (0)23 9271 4713
If you need to request service, please have the following information
· Product name.
· Product identity.
· Serial number.
· Software application version.
You can obtain this product information using the menus within your
30 HD Digital Radome User's Guide
Chapter 4 Technical specification
USA: 47CFR FCC Part 2 & Part 80
Certificate of Approval
Canada: RSS138 Iss. 1
Technical Acceptance Certificate
European Union & EFTA: R & TTE Directive 1999/05/EC
Certificate of Opinion
Australia/New Zealand: ACMA Declaration of Conformity
Compliance level 3
18 in antenna (RD418HD) 521 mm x 247 mm (20.5 in x 9.7 in)
24 in antenna (RD424HD): 652 mm x 247 mm (25.67 in x 9.7 in)
18 in antenna (RD418HD) 9.5 kg (21 lbs)
24 in antenna (RD424HD): 10 kg (22 lbs)
Supply voltage: Either 12 V dc or 24 V dc nominal
Maximum: 33 V
Power consumption: 60 W (25 W standby)
Waterproof to: IPX6
Operating temperature range: -10°C to +55°C
Humidity: Up to 95% at 35°C
Maximum wind speed: 100 kts
Maximum range scale: 48 Nautical miles (Nm)
Technical specification 31
Type: Solid-state modulator, driving magnetron
Transmit frequency: 9405 MHz ±25 MHz
Peak power output: 4 kW
Standby mode: Magnetron heater - ON
Magnetron control - ON
All other services - OFF
Range (Nm) Expanded range (Nm) Pulse width (ns) PRF
1/8, 1/4 75 3 kHz
1/2 100 3 kHz
3/4 1/8, 1/4 150 3 kHz
1/2 200 3 kHz
11/2 3/4 330 2 kHz
3 430 1.5 kHz
11/2 520 1.3 kHz
6, 12, 24 & 48 3, 6, 12, 24 & 48 900 820 Hz
Type: Patch array
Beamwidth (nominal) Horizontal: 4.9° (18 in antenna), 3.9° (24 in antenna)
32 HD Digital Radome User's Guide
Rotation speed: 24 rpm nominal
48 rpm with compatible displays
Intermediate frequency: 70 MHz
Receiver characteristic: Linear
Receiver noise: Less than 5 dB (including low noise converter and IF amplifier)
Bandwidth: Matched digital filter for each pulse length
Technical specification 33
34 HD Digital Radome User's Guide