TABLE OF CONTENTS

FOREWORD

xi

SYSTEM CONFIGURATION

xiii

1.

OPERATIONAL OVERVIEW

1-1

 

1.1

Control Description

1-1

 

1.2

Turning the Power On/Off

1-2

 

 

1.2.1 Turning the power on

1-2

 

 

1.2.2 Turning the power off

1-2

 

1.3

Lowering, Raising the Transducer

1-3

 

 

1.3.1

Lowering the transducer

1-3

 

 

1.3.2

Raising the transducer

1-3

 

1.4

Screen Brilliance

1-3

 

1.5

Control Panel Dimmer

1-4

 

1.6

Display Mode, Display Division

1-6

 

 

1.6.1 Selecting a display mode

1-6

 

 

1.6.2

Sample display mode pictures

1-7

 

1.7

Adjusting the Gain

1-13

 

1.8

Menu Overview

1-14

2.

HORIZONTAL MODE

2-1

 

2.1

Basic Operating Procedure

2-1

 

2.2

Indications and Marks

2-2

 

 

2.2.1

Horizontal mode

2-2

 

 

2.2.2

Horizontal2 mode

2-3

 

2.3

Display Range

2-7

 

2.4

Tilt Angle

2-8

 

 

2.4.1

Setting the tilt angle

2-8

 

 

2.4.2

Automatic tilt

2-9

 

 

2.4.3 Relation between bottom echo and tilt angle

2-11

 

 

2.4.4 Tilt angle for surface fish

2-12

 

 

2.4.5

Suitable tilt angle

2-13

 

2.5

Measuring Range and Bearing to a Target

2-14

 

2.6

Eliminating Weak Echoes

2-15

 

2.7

Suppressing Bottom Tail

2-17

 

 

2.7.1

Adjust AGC

2-17

 

 

2.7.2

Decrease pulse length

2-18

 

 

2.7.3

Adjust 2nd AGC

2-18

 

 

2.7.4

Adjust Near AGC

2-19

 

2.8

Suppressing Bottom and Sea Surface Reflections in Shallow Waters

2-20

 

2.9

Rejecting Sonar Interference and Noise

2-21

 

 

2.9.1

Identifying noise source

2-21

 

 

2.9.2

Interference rejector

2-21

 

 

2.9.3

Changing Tx interval

2-22

 

 

2.9.4

Shifting Tx frequency

2-22

 

 

2.9.5

Noise limiter

2-23

v

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Furuno FSV-84 manual Table of Contents