Flir BelgiumBA 18DD4KW Light Marine Navigational Radar User Manual 81313 1

Raymarine UK Ltd. Light Marine Navigational Radar 81313 1

User guide

Digital Radome ScannerUser GuideDocument Number: 81313_1Date: September 2008
Trademarks and registered trademarksAutohelm, HSB, RayTech Navigator, Sail Pilot, SeaTalk and Sportpilot are UK registered trademarks of Raymarine UK Limited. Pathfinder and Rayma-rine are UK registered trademarks of Raymarine Holdings Limited.45STV, 60STV, AST, Autoadapt, Auto GST, AutoSeastate, AutoTrim, Bidata, GSeries, HDFI, LifeTag, Marine Intelligence, Maxiview, On Board, Raychart, Raynav, Raypilot, RayTalk, Raystar, ST40, ST60+, Seaclutter, Smart Route, Tridata and Waypoint Navigation are trademarks of Raymarine UK Limited.All other product names mentioned are trademarks or registered trade-marks (if applicable) of their respective companies.© Raymarine UK Ltd 2008
 Contents                              iContentsImportant information ................................................................1Introduction........................................................................................... 1Intended use ......................................................................................... 1Safety notices........................................................................................ 1FCC Notice ............................................................................................ 2WARNING ............................................................................................. 2WARNING ............................................................................................. 2Waste Electrical and Electronic Equipment Directive............................. 2EMC conformance................................................................................. 2Declaration of conformity...................................................................... 2Multi-function display software version ................................................ 3Warranty ............................................................................................... 3Handbook information .......................................................................... 3Installation ....................................................................................5EMC installation guidelines................................................................... 5Box contents ......................................................................................... 6Required tools ....................................................................................... 6Digital Radome scanner dimensions...................................................... 718” Digital Radome scanner..............................................................  724” Digital Radome scanner..............................................................  7Planning the installation ....................................................................... 8Cable requirements ............................................................................... 9Scanner cables...................................................................................  9Running the cable to the scanner ......................................................  9Power requirements.........................................................................  10Grounding the radar system ............................................................  10Connecting the power and digital cables.........................................  11Mounting the scanner .....................................................................  14Setting up the scanner..................................................................... 15Maintenance and troubleshooting ..........................................17Introduction ..................................................................................... 17Maintenance.................................................................................... 17Troubleshooting............................................................................... 17Technical support............................................................................. 19Technical specification.............................................................. 21RD418D 18”Digital Radome scanner unit  ..........................................21RD424D 24”Digital Radome scanner unit  ..........................................23
ii        Digital Radome Scanner - User Guide
 Important information                              1Important informationIntroductionThis handbook contains an explanation of how to install, connect andmaintain your Digital Radome scanner and covers the following models:• RD418D - 18” 4 kW Digital Radome scanner.• RD424D - 24” 4 kW Digital Radome scanner.Your radar has been designed and manufactured to meet the rigorousdemands of the marine environment. However, no machine can perform itsintended function unless installed, operated and maintained properly.Please carefully read and follow the recommended procedures for installa-tion contained in this handbook.When properly installed and operated, the use of this radar will conform tothe requirements of:• IEEE C95.1 - 2005 - Standard for Safety Levels with respect to HumanExposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300GHz.• ICNIRP Guidelines 1998 - International Commission on Non-IonisingRadiation Protection: Guidelines for limiting exposure to time-varyingelectric, magnetic and electro-magnetic fields (up to 300GHz) 1998.Intended useThis product is a radar scanner intended for use within a navigational radarsystem. The intended application is for leisure marine boats and workboats not covered by IMO/SOLAS carriage requirements.Safety notices                    WARNINGRadio Frequency Radiation HazardThe radar antenna emits electromagnetic radio frequency (RF) energy which can be harmful particularly to your eyes. DO NOT look at the antenna at close range. It is important that the radar is turned off whenever personnel are required to come close to the scanner assembly or associated equipment. It is recommended that the radar scanner is mounted out of range of personnel (above head height).Distances from the face of the radar at which RF radiation levels of 100 W/m2 and 10 W/m2 exist are given belowModel Distance to 100 W/m2 pointDistance to 10 W/m2 pointRD418D Nil Worst case 1.0mRD424D Nil Worst case 1.0m
2     Digital Radome Scanner - User GuideFCC NoticeChanges or modifications to this equipment, not expressly approved in writing by Raymarine Inc., could violate compli-ance with FCC rules and void the operator’s authority to operate the equipment.Waste Electrical and Electronic EquipmentDirective          The Waste Electrical and Electronic Equipment (WEEE) Direc-tive requires the recycling of waste electrical and electronicequipment. Whilst the WEEE Directive does not apply to someof Raymarine’s products, we support its policy and ask you tobe aware of how to dispose of this product.The crossed out wheelie bin symbol, illustrated above, and found on ourproducts signifies that this product should not be disposed of in generalwaste or landfill.Please contact your local dealer, national distributor or Raymarine Tech-nical Services for information on product disposal.EMC conformance All Raymarine equipment and accessories are designed to the best industrystandards for use in the recreational marine environment. The design andmanufacture of Raymarine equipment and accessories conform to theappropriate Electromagnetic Compatibility (EMC) standards, but correctinstallation is required to ensure that performance is not compromised.Declaration of conformityRaymarine UK Limited hereby declare that the products to which thismanual relates comply with the appropriate requirements and provisions ofthe R&TTE Directive 1999/5/EC.The full Declaration of Conformity may be viewed on the relevant product pages at www.raymarine.com          WARNINGHigh VoltageThe scanner unit contains high voltages. Adjustments require specialized service procedures and tools only avail-able to qualified service technicians - there are no user serviceable parts or adjustments. The operator should never remove the scanner unit internal covers or attempt to service the equipment.          WARNINGProduct installationThis equipment must be installed in accordance with the instructions contained in this handbook. Failure to do so could result in poor product performance, personal injury and/or damage to your boat.
 Important information                              3Multi-function display software versionThe Digital Radome scanner can be connected directly to a C-Series orE-Series display, or to a C-Series, E-Series or G-Series display via aSeaTalkhs switch. For operation of your scanner, the multi-function display unit requires theappropriate software version. This is as follows:• C90W, C120W, and C140W C-Series displays - Version 1 or later.• E80, E120 E-Series displays - Version 5 or later.• G120, G150, G170, and G190 G-Series displays - Version 2 or later.The software version can be confirmed by switching on the multi-functiondisplay and checking the version number on the navigation warningscreen. However, if a scanner is not connected to the multi-functiondisplay, the version number will only be displayed for 10 seconds.WarrantyTo register your new Raymarine product, please take a few minutes to fillout the warranty card. It is important that you complete the owner infor-mation and return the card to receive full warranty benefits. Alternativelyyou can register your product on line at www.raymarine.comHandbook informationThe technical and graphical information contained in this handbook, to thebest of our knowledge, was correct as it went to press. However, our policyof continuous improvement and updating may change product specifica-tions without prior notice. As a result, unavoidable differences between theproduct and handbook may occur from time to time.
4     Digital Radome Scanner - User Guide
 Installation                              5InstallationEMC installation guidelinesAll Raymarine equipment and accessories are designed to the best industrystandards for use in the recreational marine environment.Their design and manufacture conforms to the appropriate ElectromagneticCompatibility (EMC) standards, but correct  installation is required toensure that performance is not compromised. Although every effort hasbeen taken to ensure that they will perform under all conditions, it isimportant to understand what facts could affect the operation of theproduct.The guidelines here describe the conditions for optimum EMC performance,but it is recognized that it may not be possible to meet all of these condi-tions in all situations. To ensure the best possible conditions for EMCperformance within the constraints imposed by any location, always ensurethe maximum separation possible between different items of electricalequipment.For optimum EMC performance, it is recommended wherever possible:• Raymarine equipment and cables connected to it are:• At least 3 ft. (1m) from any other equipment transmitting orcarrying radio signals. In the case of Single Side Band (SSB) radio,the distance should be increased to 7 ft. (2m).• More than 7 ft. (2m) from the path of a radar beam. A radar beamcan normally be assumed to spread 20 degrees above and belowthe radiating element.• The equipment is supplied from a separate battery to that used forengine start. Voltage drops below 10.8 V, and starter motor transients,can cause the equipment to reset. This will not damage the equipment,but may cause the loss of some information and may change the oper-ating mode.• Only Raymarine-specified cables must be used. Cutting and rejoiningthese cables can compromise EMC performance.
6         Digital Radome Scanner - User Guide Box contents          Components are dependant on your system package, but are either:• 18” 4 kW Digital Radome scanner, or• 18” 4 kW Digital Radome scanner and 10 m digital cable.• 24” 4 kW Digital Radome scanner, or• 24” 4 kW Digital Radome scanner and 10 m digital cable.• Fixing bolts and washers.• Denso Paste.• Handbook.Required tools          Radome ScannerInstallation templateD11364-1Drill 4 holes, 10 mm diameter(18'' and 24'' Radomes)141.5 mm27.5 mm18'' or 24'' Radome Mounting TemplateCenter Line of Radome3026-136-CArtwork Number 3032-866-BCenter Line of RadomeForward233 mmDenso PasteM8 bolt (x4) Springwasher (x4)Flatwasher (x4)Digital cableDrill Adhesive tape10 mm  drill bitTorque  wrench13 mm socketD11365-1
 Installation                              7Digital Radome scanner dimensions18” Digital Radome scanner          24” Digital Radome scanner          346 mm (13.62 in)diameter521 mm (20.5 in)diameter233 mm(9.17 in)D11356-1247 mm (9.7 in)116.5 mm(4.58 in)141.5 mm(5.57 in)27.5 mm(0.92 in)D11357-1247 mm (9.7 in)233 mm(9.17 in)116.5 mm(4.58 in)141.5 mm(5.57 in)27.5 mm(1.08 in)346 mm (13.62 in)diameter652 mm (25.67 in)diameter
8         Digital Radome Scanner - User Guide Planning the installation          Mount the scanner as high as possible above the waterline for better long range performance, but make sure it:• is above head height.• is easily accessible.• is as near to the boat’s centerline as possible.• is on a rigid and stable platform.• is clear of large objects such as the flybridge, large engine stacks, searchlights, horns or masts.• is clear of heat and fumes.• is at least 1 m away from a magnetic compass or other equipment antenna.Don’t put the scanner so high, that it is affected by the pitching and rolling of the boat.          Mount the scanner so that the array rotates parallel to the waterline.The radar beam is approximately 25o wide in the vertical direction, giving good target detection when your boat pitches and rolls.           Planing hull and some displacement hull boats adopt a higher bow angle when the boat is at cruising speed, giving poor target detection. It may be necessary to lower the radar beam back towards the parallel, by shimming the rear of the radar, so that the beam points slightly down when the boat is at rest. Refer to the diagram on page 14 for more information.D11358-112.5°12.5°D11359-1Wedge orwashersForwardD11360-1
 Installation                              9Cable requirementsYou must consider the following points before installing the system cables:• You need to connect the scanner to the multi-function display unit and power (and, if appropriate, via a SeaTalkhs switch).• All cables should be adequately clamped and protected from physical damage and exposure to heat - avoid running cables through bilges or doorways, or close to moving or hot objects.• Acute bends must be avoided. The digital cable for connecting the Digital Radome scanner to a multi-function display and power source has a minimum bend radius of 45mm (or diameter of 90mm).• Where a cable passes through an exposed bulkhead or deckhead, a watertight gland or swan neck tube should be used.• Avoid cutting and rejoining cables. Scanner cablesRunning the cable to the scannerDO NOT pull the cable through bulkheads using a cord attached to the connector. This could damage connections.The cable connector is at the rear of the scanner unit. If the unit is mounted on a hollow mast, the cable may be run inside the mast and connected to the unit. Make sure that the cable does not chafe where it enters and exits the mast. To minimize electrical interference try to avoid running radar cables near other onboard electrical equipment. It is also good practice to avoid running radar cables in parallel with other antenna or power cables.Digital cableThe digital cable, illustrated below, provides both power and SeaTalkhs signals to the Digital Radome scanner. It is fitted with a SeaTalkhs plug and power cores for connecting to the scanner.          For Digital Radome scanners that are purchased with a cable, the length should be sufficient to complete the cable run on most small boats. For longer runs, and for Digital Radome scanners that are purchased without a cable, optional cables and extension cables are available. Optional cable lengths available are:• Part No. A55076 - 5 m cable.• Part No. A55077 - 10 m cable.• Part No. A55078 - 15 m cable.• Part No. A55079 - 25 m cable.The following extension cables are also available:• Part No. A92141 - 2.5 m extension cable.• Part No. A55080 - 5 m extension cable.• Part No. A55081 - 10 m extension cable.For boats with 12 V DC power systems, the maximum cable length is 25 m (including any extension). If you need to run a longer cable length with a 12v supply, please contact Raymarine technical support for further advice.Note: Do not make your own cables for use with the Digital Radome scanner. Only use official Raymarine cables. To Digital Radome scanner To display and powerD11371_1
10          Digital Radome Scanner - User Guide Power cablesDigital Radome radar systems are intended for use on boat’s DC power systems operating in the range 12 to 24 V DC. The Digital Radome scanners should not be used on nominal 32 V systems.If you are replacing an existing (Analog) Radome scanner with a Digital Radome scanner, you must replace the existing cable with the cable that is included with (or purchased separately for) the Digital Radome scanner. Power requirementsThis radar is NOT recommended for use on ‘positive’ ground boats. The power cable earth screen must be connected to the boat’s ground.The boat’s power system should be either:• Negative grounded, with the negative battery terminal connected to the boat’s ground, or,• Floating with neither battery terminal connected to the boat’s ground. The following diagram shows the cable’s power and ground connections:Fuse requirementsThe power connection to the Digital Radome scanner should be made at either the output of the battery isolator switch, or at a DC power distribu-tion panel. The power connection must be protected by a thermal circuit breaker or fuse, fitted close to the power source. The following table details the fuse requirements for both 18” and 24” Digital Radomes:WARNING: If there is not a thermal circuit breaker or fuse in your power circuit (for example, fitted to your DC distribu-tion panel), you must fit an inline breaker or fuse to the positive (red) connection of the power cable.Grounding the radar systemIt is important that an effective radio frequency (RF) ground is connected to the radar system.You must ground the radar by connecting the drain wire (screen) of the power cable to the nearest ground point of your boat’s RF ground system. Full details can be found in the Owner’s Handbook for your multi-function display unit.If you need to extend the wire, the extension wire should be an 8 mm braid or 6 mm2 (AWG 10) multi-strand cable.If your vessel does not have an RF system, connect the drain wire to the negative battery terminal.Note: Use only this ground connection.Red - Battery +ve (12/24 V)Black - Battery -ve (0 V)GroundD8865_1Table 2-1: Fuse requirementsPower supply Device Rating12 V Isolator Switch 20 AThermal Breaker 10 AFuse 15 A24 V Isolator Switch 15 AThermal Breaker 5 AFuse 8 A
 Installation                              11Connecting the power and digital cablesThe following must be observed:• The threads of the Digital Radome digital cable external connector should be lightly greased with “Renolit Aqua 2 Calcium” grease if disconnected after the initial installation.• Preferred connection of the power cable is directly to your boat’s power distribution panel.• Care should be taken to ensure a firm connection between the Digital Radome’s external connector and the digital cable connector.• The digital cable connection to the Digital Radome scanner must be hand-tightened only.The following diagrams show the various configurations in which the Digital Radome scanner may be connected to your multi-function display:Digital Radome connected directly to C-Series displayNote: you must use a SeaTalkhs Crossover Coupler for direct connections.C-Series displayRadarD11372-1SeaTalkhsCrossoverCoupler12/24V power
12          Digital Radome Scanner - User Guide Digital Radome connected to networked E-SeriesRadarD11391-112/24V powerSeaTalkhsSeaTalkhsSeaTalkhs Switch
 Installation                              13Digital Radome connected to G-Series displayD11373-112/24V powerSeaTalkhsNetworkselectorswitch(in UP position)MonitorGPM 400SeaTalkhsRadarSeaTalkhs Switch
14          Digital Radome Scanner - User Guide Mounting the scanner          Preparing the mounting holes          Mounting platform,non-planing boat(level install)Mounting platform,planing boat (typicalplaning angle shown)FORWARDFORWARD12D11361-1Mounting platformD11362-1IMPORTANTEnsure mounting platform is adequately robust for this installation.FORWARD11. Tape template to mounting  platform.2. Using template, drill 10 mm   diameter hole in 4 positions. Drill 4 holes, 10 mm diameter(18'' and 24'' Radomes)141.5 mm27.5 mm233 mm18'' or 24'' Radome Mounting TemplateCenter Line of Radome3026-136-AArtwork Number 3032-866-ACenter Line of RadomeForward2
 Installation                              15Securing the scanner to the mounting platform          Note: The M8 bolts that secure the Digital Radome scanner to the mounting platform require a torque of 20Nm (177lbf.in). Use the supplied "Denso Paste" to lightly coat the mounting bolts.To prevent damage to the base of the Digital Radome scanner, you must not insert more than 25mm (1 inch) of each bolt in to the base of the scanner, as shown in the following diagram:Setting up the scannerBefore you go to seaIt is important to check the installation before you go to sea. This involves aligning the scanner and checking the system timing, using your multi-function display.These checks are described in the following sections.EMC conformance checkAlways check the installation before going to sea to make sure that it is not affected by radio transmissions, engine starting, etc.FORWARDD11363-1Mounting platform25 mm (1.0 inch)maximumD11368-1
16          Digital Radome Scanner - User Guide System checksSystem checkBefore performing any functional tests, make sure:• All securing bolts are fully tightened and mechanical locking washers as specified are in place.• All connections have been made.• All connecting wires are secured and protected as necessary.If you have installed the radar yourself, ask your local Raymarine autho-rized installation dealer to check the installation.Set up, alignment and timing checksSwitch on and initial set up1. Press and hold the POWER key of your multi-function display unit until the unit beeps. The magnetron warm-up sequence should start, after which the unit should enter standby mode.2. Power on the Digital Radome scanner, using the relevant softkey on your multi-function display.3. If necessary, adjust the brightness on your multi-function display unit.4. If necessary, change the default language settings.Transmission checkEnsure that all personnel are clear of the scanner and switch to transmit mode. Run through the radar operations as described in the relevant multi-function display unit’s Owner’s Handbook and check that all the expected data is displayed.Bearing alignmentWith the system correctly installed, check the bearing alignment to ensure that targets appear at their correct bearing relative to the boat’s bow. Adjust the alignment as necessary.Display timing adjustmentIt is advisable to check the display timing before using the system for navi-gation. For instructions on how to do this, refer to the installation guide for your multi-function display.
 Maintenance and troubleshooting                              17Maintenance and troubleshootingCAUTION: System powerAlways turn the radar system OFF before carrying out any routine maintenance on the scanner or nearby equipment.IntroductionDO NOT remove the rear cover of the multi-function display or the external cover of the Digital Radome scanner. There are no user serviceable parts or adjustments. DO NOT attempt to service the equipment.MaintenanceMaintenance is limited to the following periodical checks:• Examine the cables for signs of damage, such as chafing, nicks and cuts. If the connector is showing signs of corrosion, lightly grease the threads of the connector with “Renolit Aqua 2 Calcium” grease.• Check that the cable connectors are firmly attached.• Make sure the scanner is still securely attached to the mounting surface.• Once a year, remove, grease and re-attach the mounting bolts securing the scanner.TroubleshootingThe following table will help you identify the most likely cause of a problem, and the corrective action required to restore normal operation.          Problem Possible causes and solution“No Data” or “No Scanner” message1. Check that the cable connecting the Digital Radome scanner to the multi-function display unit is firmly attached and undamaged.2. Check relevant scanner fuses and breakers.3. Check that the power source is of the correct voltage and sufficient current.4. Software mismatch between equip-ment may prevent communication. Contact Raymarine technical support.If using a SeaTalkhs Switch:5. Check that all radar scanners are correctly connected to the SeaTalkhs switch.6. Check the status of the SeaTalkhs switch.7. Check that SeaTalkhs cables are free from damage.The bearing displayed on the multi-function display is not the same as the actual bearing.Perform the bearing alignment proce-dure described in the installation guide for the relevant multi-function display unit.
18            Digital Radome Scanner - User GuideIf you still have a problem after referring to this table, contact your local dealer, national distributor or Raymarine technical support for further advice.Always quote the product serial number. The multi-function display unit serial number can be found on the back of the unit, the scanner serial number can be found on the back of the scanner near the connector.
 Maintenance and troubleshooting                              19Technical support          www.raymarine.comUnited StatesRaymarine Technical Support(603)-881-5200Product Repair and ServiceRaymarine Product Repair Center21  Manchester Street,Merrimack,  NH03054 - 48011-800-539-5539Opening hours:Monday through Friday 0815 - 1700Eastern Standard or Eastern Daylight Savings Time.EuropeTechnical SupportServicesAccessoriesRaymarine UK LimitedAnchorage ParkPortsmouthPO3 5TDEnglandTel:+44(0)23 9271 4713Fax:+44(0)23 9266  1228Help us to help youWhen requesting service, please quote the following product information:Equipment type      Model number      Serial number  D8867_1
20            Digital Radome Scanner - User Guide
                               21Appendix A: Technical specification RD418D 18”Digital Radome scanner unit             GeneralApprovalsCE - conforms toFCC - conforms toIndustry Canada - conforms to1999/5/EC47CFR Part 2 and Part 80RSS138Dimensions Φ521 x 247 mm (20.5 x 9.7 in)Weight 9.5 kg (21 lbs)Input Voltage  12 - 24 V DC (from multi-function display unit)Power Consumption 40 W (20 W Standby)Environmental Waterproof to IPX 6Temperature range: -10° to +55°CHumidity limit: up to 95% at 35°C Maximum wind speed for satisfactory operation: 100 Kts Maximum Range Scale 48 Nautical miles (Nm)            TransmitterTransmitter Fre-quency 9405 ± 25 MHzPeak Power Output 4.0 kW (nominal)Transmitter Solid-state modulator driving MagnetronRange (Nm) Expanded Range (Nm) Pulse Width (ns) PRF (kHz)0.125, 0.25 N/A 75 ± 10ns 3.0 0.50, 0.75 0.125, 0.25 100 ± 10ns 3.0N/A 0.5, 0.75 150 ± 10ns 3.01.5 N/A 250 ± 5% 3.03 1.5 350 ± 5% 2.0N/A 3.0 450 ± 5% 1.5N/A N/A 600 ± 5% 1.36.0 6.0 1.0 μs ± 5% 740 HzStandby Mode magnetron heater and control left on, all other services offDuplexer Circulator
22       Digital Radome Scanner - User Guide            AntennaAntenna Type Patch arrayBeam Width (nominal) 4.9° horizontal, 25° verticalPolarization HorizontalRotation Rate 24 rpm (nominal)            ReceiverIF Frequency 60 MHz (nominal)Receiver Characteristic LogarithmicReceiver Noise Figure Less than 5 dB (including Low Noise Converter/Limiter & IF Receiver)Receiver Bandwidth 12/3/0.7/0.5 MHz
                               23RD424D 24”Digital Radome scanner unit             GeneralApprovalsCE - conforms toFCC - conforms toIndustry Canada - conforms to1999/5/EC47CFR Part 2 and Part 80RSS138Dimensions Φ652 x 247 mm (25.67 x 9.7 in)Weight 10.0 kg (22 lbs)Input Voltage  12 - 24 V DC (from multi-function display unit)Power Consumption 40 W (20 W Standby)Environmental Waterproof to IPX 6Temperature range: -10° to +55°CHumidity limit: up to 95% at 35°C Maximum wind speed for satisfactory operation: 100 Kts Maximum Range Scale 48 Nautical miles (Nm)            TransmitterTransmitter Fre-quency 9405 ± 25 MHzPeak Power Output 4.0 kW (nominal)Transmitter Solid-state modulator driving MagnetronRange (Nm) Expanded Range (Nm) Pulse Width (ns) PRF (kHz)0.125, 0.25 N/A 75 ± 10ns 3.0 0.50, 0.75 0.125, 0.25 100 ± 10ns 3.0N/A 0.5, 0.75 150 ± 10ns 3.01.5 N/A 250 ± 5% 3.03 1.5 350 ± 5% 2.0N/A 3.0 450 ± 5% 1.5N/A N/A 600 ± 5% 1.36.0 6.0 1.0 μs ± 5% 740 HzStandby Mode magnetron heater and control left on, all other services offDuplexer Circulator
24       Digital Radome Scanner - User Guide            AntennaAntenna Type Patch arrayBeam Width (nominal) 3.9° horizontal, 25° verticalPolarization HorizontalRotation Rate 24 rpm (nominal)            ReceiverIF Frequency 60 MHz (nominal)Receiver Characteristic LogarithmicReceiver Noise Figure Less than 5 dB (including Low Noise Converter/Limiter & IF Receiver)Receiver Bandwidth 12/3/0.7/0.5 MHz

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