SONAR User Manual

ManualsBrandsFuruno ManualsMarine EquipmentCSH-84

Table Of Contents

SAFETY INSTRUCTIONS
TABLE OF CONTENTS
FOREWORD
- A Word to CSH-83/84 Owners
- Features
- System Configuration
CONTROL DESCRIPTION
- Control Layout on Display Unit and Remote Control Box
- Main Panel
- Sub Panel 1
- Sub Panel 2 (data setting window)
- Remote Control Box
OPERATIONAL OVERVIEW
- Turning the Power On/Off
- Adjusting Screen Brilliance, Control Panel Backlighting
- Lowering the Transducer
- Selecting a Display Mode
- Selecting a Display Range
- Setting the Tilt Angle
- Adjusting the Gain
- Measuring Range and Bearing to a Target
FINE TUNING THE PICTURE
- Eliminating Unwanted Feeble Echoes
- Suppressing Seabed Tail
- Suppressing Seabed and Sea Surface Reflections in Shallow Waters
- Rejecting Sonar Interference and Noise
- Adjusting Beamwidth
MARKS AND DATA
- Marks, Data and Display Mode
- Permanently Displayed Marks and Data
- Erasable Marks and Data
MENU OVERVIEW
- USER Menu Operation
- USER Menu Description
- SYSTEM Menu Description
- DATA SET Menu Description
- INIT SET/TEST Menu Description
FUNCTION KEYS
- Programming the Function Keys
- Replaying a Function Key
- Function Key Fine Tuning
- Saving Function Key Settings to a Memory Card
- Replaying Function Key Settings from a Memory Card
ADVANCED LEVEL OPERATION
- Finding Fish School Center
- Tracking a Fish School (target lock)
- Detecting Fish Schools Aurally
- The Fish Alarm
- Relocating Fish School for Easy Observation
- Comparing of Fish School Concentration
- Measuring Fish School Speed
- The Event Mark
- True Motion Display
- Plotting Net Location Mark
- Observing Net Behavior
- Target Slice Display
PORT/STARBOARD, HORIZONTAL SLICE DISPLAYS
- Port/Starboard Display
- Horizontal Slice Display
MEMORY CARD OPERATIONS
- Initializing Memory Cards
- Saving the Picture
- Transferring Echo Data from Internal Memory to Memory Card
- Saving Net Shooting Data
- Replaying Saved Data
- Deleting Memory Card Contents
TURNING MARKS, DATA ON/OFF
INTERPRETING THE DISPLAY
- Seabed Echoes
- Fish Schools
- Sea Surface Reflections
- Wake
- False Echo by Sidelobe
- Noise and Interference
WARNINGS
- Overvoltage Warning
- Unretracted Transducer Warning
SELF TESTS
- Opening the Self Test Menu
- Self Test Description
- Interface Unit CS-120A Self Test
INPUT DATA SELECTION
- Selection of Data at Interface Unit CS-120A
- Setting Distances Between Net Sonde Transmitters
MAINTENANCE
- Display Unit Maintenance
- Hull Unit Maintenance
MENU TREE
SPECIFICATIONS
INDEX

3-6

Setting Noise limiter (data setting window: SIGNAL,

SIGNAL PROCESS)

Weak, unwanted reflections, colored light-blue or green, appear

when the water is dirty, plankton layers exists, or due to ship’s

noise. The noise limiter (NL) can reduce the effects of these

unwanted reflections–raising the setting causes them to become

bluish to background color. Normally a setting of 3 or 4 is suffi-

cient.

Adjusting Beamwidth

Beamwidth can be adjusted at SONR•BEAM, BEAM on the

data setting window.

Table 3-1 Beamwidth adjustment menus

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