Furuno 841, 821 manual First Edition AUG

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9 - 5 2 , A s h i h a r a - c h o , N i s h i n o m i y a , J a p a n

Tel ephone:	0798	- 65	- 2111
Tel efax :	0798	- 65	- 4200

All rights reserved .

Printed in Japan

	PUB. No. OME-34160
(Y OS H)	M O DE L 821/841

Your Loc al A gent/Deal er

FIRST EDITION : AUG. 1995

G : JAN . 11, 2001

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Contents Marine Radar First Edition AUG Ground both the Display Unit and the Antenna Unit Safety ArrangementsElectrical Shock Hazard Useable EnvironmentTable of Contents Features ForewordTransceiver Module contained in radome SPECIFICATIONS- ModelAntenna Unit Display UnitWarm-up time Modulator switching method Power supply & power consumptionProtection features VibrationAmbiont temperature Receiver front end MIC Michoeave IC Bandwidth 7 MHz DuplexerInterface Nmea Model 821/841 Page Configuration Model 821/841Principle of Operation How radar works Operation Control DescriptionDisplay Indications and Markers Turning the Radar On OffTransmitting Adjusting LCD Backlighting and Display ToneAdjusting Control Panel Brilliance Selecting the RangeAdjusting GAIN, STC, A/C Rain and FTC STC MAN AutoAdjusting FTC Tuning the ReceiverAdjusting A/C Rain How to tune manuallyMeasuring the Range Measuring the BearingMenu Operation Target on collision course with your vessel?Menu description Selecting the Display Mode 11 Display modesCU course-up Selecting the Presentation ModeWindow Display Guard Alarm WPT-UP waypoint-upSuppressing Radar Interference GuardSelecting Pulselength Suppressing Noise InterferenceOff Centering the Display Echo Trails Navigation Data DisplayEcho Stretch magnifying long range echoes Press the Menu key Select Nav Data and press the ENT keyWatchman Selecting Unit of Measurement for RangeSelecting Bearing Reference Displaying Navigation Data During Stand-by Erasing the Heading MarkerDeselecting Ranges Displaying Cursor Position, Range and Bearing to Cursor Visual Alarm IndicationsOutputting Cursor Position to Navigator Target Properties and Radar Wave Reflection Interpreting the DisplayRadar Wave and Radar Horizon Super-refractionFalse Echoes Bearing ResolutionRange Resolution Multiple echoes Nautical Chart and Radar Picture Blind and shadow sectorsForming any maintenance or Maintenance & TroubleshootingSafety Information Troubleshooting procedurePreventative Maintenance Replacing the FuseTroubleshooting Troubleshooting tableSelf Test Self TestInstallation Antenna Unit InstallationVent tube Removing packing materialsMounting platform How to fasten the radome base To the mounting platform Ships bow Removing packing materials 10 Antenna unit Model 841, inside view, shield cover removed 12 Optional mounting bracket installation for sailboat Display Unit Installation 13 How to mount the display unit 14 Display unit, rear view Option connector ProcedureInstallation Check List Initial Adjustment of Picture Displaying the Installation MenusEntering Initial Settings Relative Bearing AlignmentClosing the Installation Menus Sweep TimingSignal cable connection Page Page Page Page Page Page Page