Furuno 841, 821 manual Table of Contents

Page 4

TABLE OF CONTENTS

FOREWORD

ii

SPECIFICATIONS

iii

EQUIPMENT LIST

vii

CONFIGURATION

viii

1. PRINCIPLE OF OPERATION

1

1.1

What is Radar?

1

1.2

How Ships Determined Position Before

 

Radar

1

1.3

How Radar Determines Range

1

1.4

How Radar Determines Bearing

1

1.5

Radar Wave Speed and Antenna Rota-

 

tion Speed

1

1.6

The Radar Display

1

2.26

Watchman

18

2.27

Erasing the Heading Marker

19

2.28

Deselecting Ranges

19

2.29

Displaying Navigation Data During

 

 

Stand-by

19

2.30

Outputting Cursor Position to

 

 

Navigator

20

2.31

Displaying Cursor Position, Range

 

 

and Bearing to Cursor

20

2.32

Visual Alarm Indications

20

3. INTERPRETING THE DISPLAY

3.1The Radar Wave and Radar Horizon . 21

3.2Target Properties and Radar Wave

 

Reflection

21

3.3

Range Resolution

22

3.4

Bearing Resolution

22

3.5

False Echoes

22

3.6

Nautical Chart and Radar Picture

24

2. OPERATION

 

2.1 Control Description

3

2.2 Display Indications and Markers

4

2.3 Turning the Radar On and Off

4

2.4 Transmitting

5

2.5 Selecting the Range

5

2.6 Adjusting LCD Backlighting and

 

Display Tone

5

2.7 Adjusting Control Panel Brilliance

5

2.8 Adjusting GAIN, STC, A/C RAIN

 

and FTC

6

2.9 Tuning the Receiver

7

2.10

Measuring the Range

8

2.11 Measuring the Bearing

8

2.12

Menu Operation

9

2.13

Selecting the Display Mode

11

2.14 The Window Display

12

2.15

Selecting the Presentation Mode

12

2.16

Guard Alarm

13

2.17

Suppressing Radar Interference

14

2.18

Suppressing Noise Interference

15

2.19

Selecting Pulselength

15

2.20

Off Centering the Display

15

2.21

Echo Trails

16

2.22 The Navigation Data Display

16

2.23

Echo Stretch

17

2.24

Selecting Unit of Measurement

 

 

for Range

18

2.25

Selecting Bearing Reference

18

4.MAINTENANCE & TROUBLESHOOTING

4.1

Safety Information

25

4.2

Preventative Maintenance

26

4.3

Replacing the Fuse

26

4.4 Troubleshooting

27

4.5

Self Test

28

5. INSTALLATION

 

5.1 Antenna Unit Installation

29

5.2

Display Unit Installation

36

5.3

Installation Check List

39

5.4

Initial Adjustment of Picture

40

5.5

Displaying the Installation Menus

40

5.6

Entering Initial Settings

41

5.7

Relative Bearing Alignment

41

5.8

Sweep Timing

42

5.9

Closing the Installation Menus

42

5.10 Signal cable connection

44

OUTLINE DRAWINGS

D-1

INTERCONNECTION

 

DIAGRAMS

S-1

SCHEMATIC DIAGRAMS

S-3

Declaration of Conformity

 

i

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Contents Marine Radar First Edition AUG Safety Arrangements Electrical Shock HazardGround both the Display Unit and the Antenna Unit Useable EnvironmentTable of Contents Features ForewordSPECIFICATIONS- Model Antenna UnitTransceiver Module contained in radome Display UnitPower supply & power consumption Protection featuresWarm-up time Modulator switching method 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 OffAdjusting LCD Backlighting and Display Tone Adjusting Control Panel BrillianceTransmitting Selecting the RangeAdjusting GAIN, STC, A/C Rain and FTC STC MAN AutoTuning the Receiver Adjusting A/C RainAdjusting FTC 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 modesWindow Display Selecting the Presentation ModeCU course-up Guard Alarm WPT-UP waypoint-upSuppressing Radar Interference GuardOff Centering the Display Suppressing Noise InterferenceSelecting Pulselength Echo Trails Navigation Data DisplayEcho Stretch magnifying long range echoes Press the Menu key Select Nav Data and press the ENT keySelecting Bearing Reference Selecting Unit of Measurement for RangeWatchman Deselecting Ranges Erasing the Heading MarkerDisplaying Navigation Data During Stand-by Outputting Cursor Position to Navigator Visual Alarm IndicationsDisplaying Cursor Position, Range and Bearing to Cursor Interpreting the Display Radar Wave and Radar HorizonTarget Properties and Radar Wave Reflection Super-refractionRange Resolution Bearing ResolutionFalse Echoes Multiple echoes Nautical Chart and Radar Picture Blind and shadow sectorsMaintenance & Troubleshooting Safety InformationForming any maintenance or Troubleshooting procedurePreventative Maintenance Replacing the FuseTroubleshooting Troubleshooting tableSelf Test Self TestInstallation Antenna Unit InstallationMounting platform Removing packing materialsVent tube 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