Furuno FSV-75 - Page 9

TABLE OF CONTENTS
vii
3.6.2 Seabed AGC ..................................................................................................3-8
3.6.3 How to adjust the pulse length .......................................................................3-8
3.6.4 Noise suppression..........................................................................................3-9
3.7 How to Suppress Bottom and Sea Surface Reflections in Shallow Waters ...............3-9
3.8 How to Reject Sonar Interference and Noise ...........................................................3-10
3.8.1 How to identify the noise source ..................................................................3-10
3.8.2 Change the TX interval.................................................................................3-10
3.8.3 Interference rejector .....................................................................................3-11
3.8.4 How to shift the TX frequency ......................................................................3-11
3.8.5 How to adjust the RX bandwidth (Auto Filter) ..............................................3-12
3.8.6 Noise limiter..................................................................................................3-12
3.8.7 Reverberation...............................................................................................3-13
3.8.8 Echo average ...............................................................................................3-13
3.8.9 2nd echo rejection ........................................................................................3-13
3.9 How to Adjust Beam Width.......................................................................................3-13
3.10 How to Detect Schools of Fish Aurally .....................................................................3-14
3.10.1 How to turn the audio on/off .........................................................................3-14
3.10.2 How to select the audio sector .....................................................................3-15
3.10.3 How to set the audio bearing........................................................................3-15
3.10.4 Adjusting the audio volume ..........................................................................3-15
3.11 Fish Alarm ................................................................................................................3-16
3.11.1 How to activate/deactivate the fish alarm.....................................................3-16
3.11.2 Alarm Level ..................................................................................................3-17
3.12 Menu Items Descriptions..........................................................................................3-17
3.12.1 Display Setting menu ...................................................................................3-17
3.12.2 Picture Setting menu ....................................................................................3-20
4. FISH FINDER MODE .............................................................................................4-1
4.1 Basic Operating Procedure ........................................................................................4-1
4.2 Fish Finder Display Overview.....................................................................................4-2
4.3 How to Select a Display Range..................................................................................4-2
4.4 How to Adjust the Gain...............................................................................................4-3
4.5 How to Select Picture Advance Speed.......................................................................4-3
4.6 How to Measure Depth, Distance...............................................................................4-4
4.7 How to Reject Interference.........................................................................................4-4
4.8 How to Erase Weak Echoes.......................................................................................4-5
4.9 How to Reject Low Level Noise (Clutter)....................................................................4-5
4.10 How to Adjust TVG (Time Varied Gain)......................................................................4-6
4.11 Smoothing ..................................................................................................................4-7
4.12 How to Remove Unwanted Echoes near the Surface ................................................4-7
4.13 How to Customize the Colors for Fish Finder Display ................................................4-8
4.14 How to Change the Depth Scale Position ..................................................................4-9
4.15 How to Select the Fish Finder Model........................................................................4-10
4.16 [Transducer Setting] Menu .......................................................................................4-10
4.16.1 How to open the [Transducer Setting] menu................................................4-10
4.16.2 Menu items on the [Transducer Setting] menu ............................................4-10
4.17 [Calibration] Menu ....................................................................................................4-11
4.17.1 How to open the [Transducer Setting] menu................................................4-11
4.17.2 Menu items on the [Calibration] menu..........................................................4-11
5. 3D MODE ...............................................................................................................5-1
5.1 Basic Operating Procedure ........................................................................................5-1
5.2 3D Display Overview ..................................................................................................5-2
5.3 Basic Operation..........................................................................................................5-3
5.3.1 How to change the viewpoint angle................................................................5-3
5.3.2 How to reset the viewpoint position................................................................5-3