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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 2
nd
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