Furuno FR-8051 manual RF Transceiver Unit, Modulator Trigger

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5.2 RF Transceiver Unit

IF Amplifier	Limiter S-LX5B or RU-9099

MIC

RU-5072

or RU-9253Circulator RU-3686

MODULATOR TRIGGER

Board (RFC-9163)

N photo No. 3190

Figure 5-2 RF transceiver unit (FR-8251)

Pulse Transformer RT-4037

Magnetron M5187F or 9M752

N photo No. 3191

MODULATOR Board

MD-5145

Figure 5-3 RF transceiver unit (FR-8251), bottom view, cover removed

5 – 2

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Contents Marine Radar First Edition NOV Safety Information Do not diassemble or modify the equipment Radio Frequency Radation Hazard IiiUse the correct fuse Table of Contents Maintenance Vii Features Word to FR-8051/8111/8251 OwnersForeword Configuration of FR-8051/8111/8251 Transceiver Module SpecificationsAntenna Unit Power Supply and Power Consumption Display UnitEnvironmental Conditions OthersEquipment Lists Standard SetXii Name Type Qty RemarksOptional Equipment Spare PartsXiii Name Type Code No RemarksFunction Type Categorization by SpecificationXiv Operation Control DescriptionDisplay Indications 25 NMDisplay indications lower part Transmitting, Stand-by Turning the Radar On/OffSelecting Range Presentation mode Description Representative display Presentation ModeSelecting presentation mode Presentation mode DescriptionChanging pages on the Initial menu Menu OverviewBasic menu operation Menu tree MK Erase erase all fixed marksInitial Tune SET AUTO, Manu SPD Mode MAN, LOG, NAV Tuning the Receiver Adjusting SensitivityAdjusting Picture Brilliance Selecting tuning modeAdjusting Brilliance of Control Panel and Markers Adjusting Range Ring BrillianceSuppressing Sea Clutter Automatic anti-clutter controlSuppressing Rain Clutter Heading and North MarkersMeasuring the Range Measuring range by the range ringsMeasuring Bearing Canceling the cursor offset Collision Assessment by Measuring Range Offset EBLIndex Lines Off-centering the PictureFunction key ZoomInscribing Marks on the Display Automatic speed input Own Ship SpeedTurning on a function Ship’s Graphic Interference RejectorEcho Trails Manual speed inputCanceling echo trail Starting echo trailTrail time Trail referencePlotting a target Electronic Plotting E-plotTrail brilliance Canceling target plotting Target dataTrue or relative vector Vector timeSetting a Guard Alarm Zone Setting a guard zoneSelecting guard zone type Activating the guard zonesWatch Alarm Silencing the aural alarmCanceling the guard zone and guard alarm How to turn on echo averagingSuppressing Second-Trace Echoes 26 Echo averagePresetting pulselength Echo StretchNoise Rejection Selecting PulselengthSelecting pulselength set to use Waypoint DisplayOutputting Cursor Position TLL data Sector Blanking Alarm Output Signal On/OffSelecting Unit of Range Measurement, Bearing Reference Radar Picture, Target Properties and Radar Pulse Range ResolutionRadar Observation Bearing Resolution False EchoesIndirect echoes Multiple echoesMinimum and Maximum Ranges Side-lobe echoesMinimum range Blind and shadow sectorsLocating a Ship or Survival Craft in Distress by Sart Gain Maintenance When Working on the Antenna UnitInterval Check point Check and measures Remarks Part Type Life expectancy RemarksProblem Remedy TroubleshootingSimple Troubleshooting Problem Check point and probable Remedy Cause Advanced-level TroubleshootingServiceman qualification Problem Check point and probable Remedy Cause Problem Check point and probable Remedy Cause Diagnostic Test Diagnostic test, test patternLocation of Parts Antenna UnitRF Transceiver Unit Modulator TriggerRF transceiver unit FR-8051/8111 Display Unit common to all models Display unit, top viewDisplay unit, right side view Performance Monitor Operating a performance monitorTransmitter Receiver Performance Display Meaning Transmitter normal Receiver normalFluxgate Heading Sensor C-2000 Auto Plotter ARP-15Video Plotter RP-15 Page