Furuno FSV-85, Operator'S Manual

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TABLE OF CONTENTS
FOREWORD ...................................................................................................................ix
SYSTEM CONFIGURATION ...........................................................................................x
1. OPERATIONAL OVERVIEW .................................................................................1-1
1.1 Control Description..................................................................................................... 1-1
1.1.1 Control unit..................................................................................................... 1-1
1.1.2 Sub control unit (option) ................................................................................. 1-2
1.1.3 Remote controller (option).............................................................................. 1-3
1.2 Turning the Power On/Off .......................................................................................... 1-4
1.3 Lowering, Raising the Transducer ............................................................................. 1-4
1.3.1 Lowering the transducer................................................................................. 1-5
1.3.2 Raising the transducer ................................................................................... 1-5
1.4 Screen Brilliance, Panel Dimmer ............................................................................... 1-5
1.4.1 Screen brilliance............................................................................................. 1-5
1.4.2 Panel dimmer ................................................................................................. 1-5
1.5 Display Mode, Display Division .................................................................................. 1-6
1.5.1 How to select a display mode ........................................................................ 1-8
1.5.2 Display mode pictures.................................................................................... 1-8
1.6 How to Adjust the Gain ............................................................................................ 1-11
1.7 How to Use the Menu............................................................................................... 1-12
2. HORIZONTAL MODE ............................................................................................2-1
2.1 Basic Operating Procedure ........................................................................................ 2-1
2.2 Indications and Markers ............................................................................................. 2-2
2.2.1 Horizontal mode, full-screen display .............................................................. 2-2
2.2.2 Horizontal2 mode ........................................................................................... 2-3
2.3 Display Range............................................................................................................ 2-4
2.4 Tilt Angle .................................................................................................................... 2-5
2.4.1 How to set the tilt angle.................................................................................. 2-5
2.4.2 Automatic tilt................................................................................................... 2-5
2.4.3 Relation between bottom echo and tilt angle ................................................. 2-7
2.4.4 Tilt angle for surface fish ................................................................................ 2-8
2.4.5 Suitable tilt angle............................................................................................ 2-8
2.5 How to Measure Range and Bearing to a Target....................................................... 2-9
2.6 How to Eliminate Weak Echoes ................................................................................. 2-9
2.7 How to Adjust Strong, Weak Echoes ....................................................................... 2-12
2.7.1 AGC ............................................................................................................. 2-12
2.7.2 Near AGC..................................................................................................... 2-12
2.7.3 2nd AGC ...................................................................................................... 2-13
2.7.4 How to shorten pulse length......................................................................... 2-14
2.8 How to Suppress Bottom and Sea Surface Reflections in Shallow Waters ............. 2-15
2.9 How to Reject Sonar Interference and Noise........................................................... 2-16
2.9.1 How to identify the noise source .................................................................. 2-16
2.9.2 Change TX interval ...................................................................................... 2-16
2.9.3 Interference rejector ..................................................................................... 2-17
2.9.4 Shift TX frequency........................................................................................ 2-17
2.9.5 Noise limiter ................................................................................................. 2-18
2.9.6 Reverberation............................................................................................... 2-19
2.9.7 Echo average ............................................................................................... 2-19
2.9.8 Reference bearing in frequency shift ........................................................... 2-19
2.9.9 How to suppress sidelobes .......................................................................... 2-19
2.10 How to Adjust Beam Width ...................................................................................... 2-20