Furuno FR-8051 manual Performance Monitor, Operating a performance monitor

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Appendix A DESCRIPTION OF OPTIONAL EQUIPMENT

This appendix provides a brief description of op- tional equipment which can be connected to the FR-8051/8111/8251. For more detailed informa- tion, see the respective operator’s manual.

A.1 Performance Monitor

A performance monitor is required for a radar in- stalled on vessels of 300 GT and upward engaged in international voyages. For X-band radars, the FURUNO PM-30 satisfies the requirement cov- ering 9410 ±50 MHz.

The performance monitor is an independent unit, namely, it is not interconnected with any unit of the radar system except for the 100 VAC power cable. In some radars the power cable is not routed via the power switch or other control of the radar and the monitor is operated as completely a sepa- rate device.

Operating a performance monitor

Transmit the radar on the 24 nm range scale and select a long pulse. The radar screen will show several arcs, opposite to the heading marker (pro- vided that the performance monitor is installed behind the radar antenna as is normally the case.) If the radar transmitter and receiver are in good working conditions inasmuch as the original state when the monitor was tuned, the innermost arc should appear at 12 nm and there should be a to- tal of 4 arcs.

The range of the innermost arc reduces 3 nm with every 3 dB loss of transmitted power. The receiver sensitivity can be evaluated from the number of visible arcs; one arc is lost every 3 dB deteriora- tion of the sensitivity.

Transmitter

Receiver

performance

performance

 

 

 

 

Range to

Loss

No. of

Loss

innermost

 

arcs

 

arc

 

 

 

 

 

 

 

12 nm

0 dB

4

0 dB

 

 

 

 

9 nm

3 dB

3

3 dB

 

 

 

 

6 nm

6 dB

2

6 dB

 

 

 

 

3 nm or

10 dB

1

9 dB

less or none

 

 

 

 

 

 

 

 

 

0

12 dB

 

 

 

 

Display

Meaning

 

TRANSMITTER: normal

 

RECEIVER: normal

12 nm

 

TRANSMITTER: 3 db loss

 

(Transmitter system has lost

 

half of initial power.

9 nm

Suspect magnetron and

 

feeder system.)

 

RECEIVER: normal

 

TRANSMITTER: 3 db loss

 

(Transmitter system has lost

 

half of initial power.

9 nm

Suspect magnetron and

 

feeder system.)

 

RECEIVER: 3 db loss

 

(Receiver has lost half of

 

normal sensitivity. Suspect

 

receiver front end, water

 

leakage in feeder system,

 

etc.

A – 1

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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 Features Word to FR-8051/8111/8251 Owners ForewordVii Configuration of FR-8051/8111/8251 Specifications Antenna UnitTransceiver Module Power Supply and Power Consumption Display UnitEnvironmental Conditions OthersEquipment Lists Standard SetXii Name Type Qty RemarksOptional Equipment Spare PartsXiii Name Type Code No RemarksCategorization by Specification XivFunction Type Operation Control DescriptionDisplay Indications 25 NMDisplay indications lower part Turning the Radar On/Off Selecting RangeTransmitting, Stand-by Presentation Mode Selecting presentation modePresentation mode Description Representative display Presentation mode DescriptionMenu Overview Basic menu operationChanging pages on the Initial menu 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 PictureZoom Inscribing Marks on the DisplayFunction key Own Ship Speed Turning on a functionAutomatic speed input Ship’s Graphic Interference RejectorEcho Trails Manual speed inputCanceling echo trail Starting echo trailTrail time Trail referenceElectronic Plotting E-plot Trail brilliancePlotting a target 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 PulselengthWaypoint Display Outputting Cursor Position TLL dataSelecting pulselength set to use Alarm Output Signal On/Off Selecting Unit of Range Measurement, Bearing ReferenceSector Blanking Range Resolution Radar ObservationRadar Picture, Target Properties and Radar Pulse 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 RemarksTroubleshooting Simple TroubleshootingProblem Remedy Advanced-level Troubleshooting Serviceman qualificationProblem Check point and probable Remedy Cause 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 normalAuto Plotter ARP-15 Video Plotter RP-15Fluxgate Heading Sensor C-2000 Page