Koden CVS-FX2BB, CVS-FX2 Basic Operation Manual

Declaration of Conformity

(As referred to in Annex IV 2. of Directive 2004/108/EC)

Declares under his sole responsibility that the produced Echo Sounder manufactured by

Koden Electronics Co., Ltd.

5278 Uenohara

Uenohara-Shi

Yamanashi-Ken

,

409-0112, Japan

Telephone +81 554 20 5860 Telefax +81 554 20 5875

Identified by the type number CVS-FX2 to which this declaration refers conforms to the

relevant essential requirements of Directive 2004/108/EC and is in conformity with the EMC requirements of EU harmonised standard

EN 60945: 2002 ( Clauses 9,10 & 12 )

Authorised representative in Europe

Heinz Hoghoff Koden Elektronik GmbH. Am Gewerbepark 15 D-64823, Gross–Umstadt Germany. Phone +49 6078 2056 Telefax+49 6078 73824

Signed : Heinz Hoghoff,

Dated : 19 Jul. 2012 Document No. 72-2731U-X004

N.B. As this product is for Maritime use compliance with Directive 72/23/EEC is not required.

Declaration of Conformity

(As referred to in Annex IV 2. of Directive 2004/108/EC)

Declares under his sole responsibility that the produced Echo Sounder manufactured by

Koden Electronics Co., Ltd.

5278 Uenohara

Uenohara-Shi

Yamanashi-Ken

,

409-0112, Japan

Telephone +81 554 20 5860 Telefax +81 554 20 5875

Identified by the type number CVS-FX2BB to which this declaration refers conforms to the

relevant essential requirements of Directive 2004/108/EC and is in conformity with the EMC requirements of EU harmonised standard

EN 60945: 2002 ( Clauses 9,10 & 12 )

Authorised representative in Europe

Heinz Hoghoff Koden Elektronik GmbH. Am Gewerbepark 15 D-64823, Gross–Umstadt Germany. Phone +49 6078 2056 Telefax+49 6078 73824

Signed : Heinz Hoghoff,

Dated : 17 Feb. 2012 Document No. 71-2731U-X013

N.B. As this product is for Maritime use compliance with Directive 72/23/EEC is not required.

CVS-FX2/FX2BB Document Revision History

CVS-FX2/FX2BB Basic Operational Manual

Doc No. 0093102002

Document Revision History

No. Doc. No-Rev. No.

0 0093102002-00 2012/02/20 First edition

1 0093102002-01 2012/12/10 Declaration

2 0093102002-02 2014/03/10

3 0093102002-03 2014/04/14

4

5

6

7

8

Date revised

(Y/M/D)

Revised content

Revision: (From software KM-F15 Ver. 1.01 34 to Ver. 1.** **) Revision: (From software KM-F15 Ver. 1.01 35 to Ver. 1.** **)

9

10

Document No. Revised Version Norm

When part of the document needs to be revised, the document has advanced revision number. The document No. is indicated at the lower right side on the cover and at the left or right side of the footer region of each page.

No part of this publication may be reproduced, transmitted, translated in any form by any means without the written permission of Koden Electronics Co., Ltd. The technical descriptions contained in this publication are subject to change without notice. Koden assumes no responsibility for any errors, incidentals or consequential damages caused by misinterpretation of the descriptions contained in this publication.

0093102002-03 i

Important Notice CVS-FX2/FX2BB

Important Notice

 For copy and transcription of this Operation Manual (hereinafter referred to as this

manual), permission from Koden is needed. Koden prohibits the un-authorized copy and transcription of this manual.

 If this manual is lost or damaged, consult a dealer of Koden or Koden.

 The specification of the products and the contents in this manual are subject to change

without notice.

 The contents displayed on the menu of product may be different from the expression of

this manual. The fonts and shapes of the keys and menus in the illustration may differ from the actual ones, and some parts may be omitted.

 Koden is not liable for damages and troubles arisen from misunderstanding of the

contents in this manual.

 Koden is not liable for any damages caused by earthquake, lightning, wind and flood

damage and fire for which Koden is not responsible, and actions by third parties, other accidents, customer’s unintended error/abuse and the use under other abnormal conditions.

 Koden is not liable for damages of accompaniment (change/loss of memorized content,

loss of business profit, stop of business) arisen from use or failure of our products.

 If the stored data are changed or lost, irrespective of causes of troubles and damages,

Koden is not liable for them.

 Koden is not liable for any damages arisen from malfunction caused by combination of

software and connected equipment in which Koden is not engaged.

ii 0093102002-03

CVS-FX2/FX2BB For Your Safe Operation

For Your Safe Operation

Symbol used in this Operation Manual

The following pictograms are used in this manual. The meaning of each symbols shall be well understood and the maintenance and inspection shall be carried out.

Symbol Meaning

Mark for warning

This mark denotes that there is a risk of death or serious injury when dealt

Warning

with incorrectly.

Mark for danger of high voltage

This mark denotes that there is a risk of death or serious injury due to

electric shock when dealt with incorrectly.

Mark for caution

This mark denotes that there is a risk of slight injury or damages of

Caution

devices when dealt with incorrectly.

Mark for prohibition

This mark denotes prohibition of specified conducts. Description of the prohibition is displayed near the mark.

Caution items on equipment

Be careful of high voltage inside

High voltage, which may risk your life, is used. This high voltage may

Warning

remain in the circuit even after the power is switched off. To prevent contact with the high voltage circuits accidentally, a protective cover or the label with this mark is provided on the high voltage circuit. When the inside is to be checked, ensure to switch off the power and to discharge the residual voltage for safety. An engineer authorized by Koden shall carry out the inspection and maintenance works.

Power off in the boat

An accidental power-on during works may result in worker’s electrification. To prevent such accident in advance, ensure that power in the boat and on the equipment are switched off. Furthermore, it is safer to hang a caution tag saying “Under work” near the power switch of equipment.

Be careful of dust

Inhaled dust may cause respiratory affection. At the time of cleaning the inside of equipment, be careful not to inhale dust. Wearing a safety mask is recommended.

0093102002-03 iii

For Your Safe Operation CVS-FX2/FX2BB

Caution on location of installment

Caution

Cautions on handling

Warning

The equipment shall not be installed at locations which are excessively damp and suffers from water drops. Otherwise, dew condensation may occur inside the display screen, and corrosion may occur inside the unit box.

Measures against static electricity

Static electricity may be generated from the carpet on the floor in the cabin or clothes made of synthetic fiber, and it may destroy the electronic components on circuit boards. The circuit boards shall be handled with appropriate measures against static electricity.

Caution at installation of transducer

Transducer shall be installed at locations where there is no effect by bubble and noise. Bubble and noise may seriously degrade the performance of this equipment.

No disassembly or modification of this equipment is allowed. It may lead to failure, firing, smoking or electric shock. In case of failure, please contact Koden’s dealers or Koden.

Warning

Caution

In case of smoking or firing, switch off the power in the boat and of this equipment. It may lead to firing, electric shock or damages.

Be careful of residual high voltage

High voltage may remain in capacitors for several minutes after switching off the power. Before inspection of the inside, please wait at least 5 minutes after switching off or discharge the residual electricity in an appropriate manner. Then, start the work.

The information displayed on this equipment is not intended to use for your navigation. For your navigation, be sure to see the specified materials.

Please use the specified fuses. If un-specified fuses are used, they may cause firing, smoking or damages.

Be sure to submerge the transducer in water before transmission. If not, it may be damaged.

iv 0093102002-03

CVS-FX2/FX2BB Contents

Contents

Document Revision History ....................................................................................................... i

Important Notice ....................................................................................................................... ii

For Your Safe Operation .......................................................................................................... iii

Contents ................................................................................................................................... v

Introduction ............................................................................................................................. vii

Chapter 1 Preparation ............................................................................................1-1

1.1 To use keys ..................................................................................................................... 1-1

1.2 Power On/Off .................................................................................................................. 1-3

1.2.1 Power On ............................................................................................................................ 1-3

1.2.2 Power Off ............................................................................................................................ 1-4

1.2.3 Power Voltage Alarm .......................................................................................................... 1-4

1.3 Selection of language to be displayed ............................................................................ 1-4

1.4 To use Menu ................................................................................................................... 1-5

1.4.1 Open/Close the Menu ........................................................................................................ 1-5

1.4.2 Operation of the Menu ........................................................................................................ 1-6

1.4.3 Open/Close of Submenu .................................................................................................... 1-8

1.4.4 Operation of SUBMENU ..................................................................................................... 1-9

1.5 To read echo sounder’s screen ...................................................................................... 1-11

1.6 Adjustment of brilliance for comfortable viewing ....................................................... 1-14

1.6.1 Adjustment of LCD brilliance ............................................................................................ 1-14

1.6.2 Adjustment of panel brilliance .......................................................................................... 1-15

Chapter 2 Basic operation .....................................................................................2-1

2.1 Switch screen images (Setting up of CM menu) ............................................................. 2-1

2.1.1 Display of 1-frequency/displays of 2-frequency and more ................................................. 2-1

2.1.2 Setting frequency to match the transducer to be used ...................................................... 2-3

2.1.3 Displaying of zoom images ................................................................................................ 2-6

2.1.4 Display of mixed images .................................................................................................. 2-15

2.1.5 Selection of pulse length .................................................................................................. 2-19

2.1.6 Selection of frequency bandwidth .................................................................................... 2-22

2.1.7 Selection of gain changing method .................................................................................. 2-25

2.2 Adjustment of echo sounder ......................................................................................... 2-26

2.2.1 Switching of depth range mode ........................................................................................ 2-26

2.2.2 Switching of Normal/Zoom for range and shift operation ................................................. 2-28

2.2.3 Manual change of a range for normal image ................................................................... 2-29

2.2.4 Manual change of shift positions of normal images ......................................................... 2-36

2.2.5 Adjustment of image gain ................................................................................................. 2-46

2.2.6 Adjustment of TVG ........................................................................................................... 2-55

2.3 Changing of the image scroll speed ............................................................................. 2-67

2.4 Finding out depth of targets in images (VRM operation) .............................................. 2-69

2.4.1 Changing of VRM follow interval ...................................................................................... 2-70

2.4.2 Operation of VRM in Active Screen .................................................................................. 2-72

2.4.3 Operation of VRM on all Screens ..................................................................................... 2-74

2.5 Reduction of noise on images ...................................................................................... 2-76

2.5.1 To reject interference ........................................................................................................ 2-76

2.5.2 To erase the weak response from dust and plankton, etc. ............................................... 2-80

2.5.3 To reduce noise ................................................................................................................ 2-85

Chapter 3 To make the best of [CM] keys .............................................................3-1

3.1 To use [CM] keys ............................................................................................................ 3-1

0093102002-03 v

Contents CVS-FX2/FX2BB

3.1.1

To use [CM] key for switching screen modes ..................................................................... 3-2

3.1.2 To use [CM] keys as one touch switch to the memorized setting to the fishing positions .. 3-6

3.1.3 Use [CM] keys as screen mode switching and one touch switch of setting: .................... 3-10

Chapter 4 Useful operation ................................................................................... 4-1

4.1 Temporary change of images for better view .................................................................. 4-1

4.2 Use function keys ([F1]/[F2]) ........................................................................................... 4-1

4.2.1 To use function keys ([F1]/[F2]) .......................................................................................... 4-1

4.2.2 Assign intended operation to function keys ([F1]/[F2]) ....................................................... 4-2

4.3 Switching of range mode ................................................................................................ 4-3

4.3.1 Switch to manual operation ................................................................................................ 4-3

4.3.2 Setting of auto range .......................................................................................................... 4-4

4.3.3 Setting of auto shift ............................................................................................................. 4-6

4.4 To use event key ............................................................................................................. 4-8

4.4.1 Registration of waypoints.................................................................................................... 4-8

4.4.2 To store images .................................................................................................................. 4-8

4.4.3 Starting up Homing ............................................................................................................. 4-9

4.4.4 Selection of event key function ......................................................................................... 4-10

4.5 Shortcut to range registration menu .............................................................................. 4-12

4.6 To move the position of menu ....................................................................................... 4-13

Chapter 5 Index ...................................................................................................... 5-1

vi 0093102002-03

CVS-FX2/FX2BB Introduction

Introduction

CVS-FX2 is the 15inch LCD color echo sounder that can display images in 4 optional frequencies.

CVS-FX2BB is the Black Box type without the display unit of CVS-FX2, for which customer can select the display monitor of preference. The external monitor and connecting cable are user supply.

This unit equipped with the latest digital process can accurately display circumstances in the water under all conditions.

The main features of this unit are as follows:

 This unit is a multi-frequency echo sounder with broadband transducers.

 With a simple operation on a menu, frequencies up to 4 can be optionally set within a wide

range.

 With digital reception processing, the high resolution in shallow depth and the noise

reduction capability in deep depth are both attainable. In addition, optimum images can be displayed by the auto mode function.

 The high-performance LCD maintains high visibility under any conditions. (Only CVS-FX2 )

 With adoption of a special filter (AR coated), images can be seen clearly even under the

direct sunlight. Well protected against reflection on the LCD screen and dew condensation. (Only CVS-FX2 )

 This unit has high waterproof level and can be installed in an open bridge. (Only

CVS-FX2 )

 Sona-Tone

TM

(Sonar sound) function provides fish school status by sound..

 Up to 500 graphic images can be stored. Homing function is available by pushing event

key while recalling the stored images, to provide navigation guidance to the designated position (optional GPS is required).

 Various alarm functions are available (Bottom, school of fish, water temperature*, vessel

speed*, arrival*, XTE*, power source).

(Note: The mark * denotes that the connection of optional sensors is required)

 The display and the operation units can be easility installed from the front side by flush

mounting. (Flush mounting of monitor is only for CVS-FX2).

 RGB analog output to an external monitor is provided as standard. The use of external

monitor enables to observe the echo sounder images from the place distant from the main unit (External monitor is owner supply).

 The data for image, waypoint, and setting can be backed up in the USB memory and the

SD card, to be recalled later.

 As the operation unit is separated, operation away from the processor and the display units

is possible.

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1-

Chapter 1 Preparation CVS-FX2/FX2BB

1.4.2 Operation of the Menu

Press [▲] key or [▼] key of to select a menu item while Menu is displayed.

List of the setting items changes to the corresponding contents with the selected menu item.

Menu column Setting item column Setting value column

Press [ ] key of .

Then, a cursor appears in the Setting item column.

Menu column Setting item column Setting value column

Echo Adjust

IR

Press [▲] key or [▼] key of to select the item to change.

1-6 0093102002-03

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00

3102002-0

1-

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1-8

009310200

-03

CVS-FX2/FX2BB Chapter 1 Preparation

1.4.4 Operation of SUBMENU

Press [▲] key or [▼] key of to select a menu item during SUBMENU is displayed.

List of the setting items changes to the corresponding contents with the selected Submenu item.

Menu column Setting item column Setting value column

Press [

] key of .

Cursor appears in the setting item column.

Menu column Setting item column Setting value column

System

Event Key Usage

Press [▲] key or [▼] key of to select the item to change.

0093102002-03 1-9

Chapter 1

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1-10

009310200

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CVS-FX2/FX2BB Chapter 1 Preparation

1.5 To read echo sounder’s screen

A screen of echo sounder consists of the header display in a gray color stripe at upper portion and the image display part of the echo sounder.

The header display indicates setting status of various functions by icons for easier understanding.

The echo sounder image display part overlays the necessary information for fish school finding.

22

21

6 7 8 5 4 3 2 1

11

12

13 15 14 16 17 18 19 20 14 15 12 19 20

Header display

9

10

No. Name Description

1 Range Mode [Auto Range] for Auto Range

No display for Manual [Auto Shift] for Auto Shift

2 [SHIFT] and [RANGE] status

icon

3 Shift mode icon Shift: All screens same

4 Range mode icon All screens same

0093102002-03 1-11

Shift/Range on normal screen Shift on partial zoom/Range zoom screen

Shift: Scr. Individual

Shift off

Scr. Individual

Chapter 1 Preparation CVS-FX2/FX2BB

5 Gain (TD) L2: Gain value of low frequency 2

L1: Gain value of low frequency 1 H2: Gain value of high frequency 2 H1: Gain value of high frequency 1

6 CM icons

7 Alarm setting status

8 [EVENT] key status

(indicates the settings)

9 Image scroll speed

10 F1]/[F2] key status icon

(indicates the settings)

CM1 on display CM2 on display CM3 on display CM4 on display CM5 on display CM6 on display

: Bottom Alarm ON : Fish Alarm ON : Speed Alarm ON : Arrival Alarm ON : XTE Alarm ON : Water Temp Alarm ON

No display: No Alarm activated

: Position storage and TLL output : Image storage : Start Homing

: High speed

: Stop : Normal (1/1) : Low speed

: Shift Digit Input : IR (Interference rejection) : Color Erase : Noise Reduction : Background color : TVG Adjust : White Line : A Scope : Image Swap : Image Title : VRM Interval : Nav Start : Image Recall : Frequency : Event Key Usage : Key Lock : Depth Unit : Color Tone : B.D. Mode

1-12 0093102002-03

CVS-FX2/FX2BB Chapter 1 Preparation

Display portion of echo sounder images

No. Name Description

11 Time marker

White/Black and Green/Black switch at every 5 minutes.

12 Image title

Numerical value: Frequency

13 Color Bar Scale Scale for color representation of images by echo

sounder

14 Zoom image title

15 Gain knob icon

None : Operation unavailable

16 Water temperature Value of water temperature ( ˚C or ˚F) 17 Vessel speed Vale of vessel speed (kn, km/h or mph) 18 Water depth Depth of sea bottom (m, J.fm, fm, I.fm, ft) 19 Scale Depth scale of normal images and zoom images 20 Zoom range bar

Alarm range bar

21 SD card icon : SD card connected

22 USB memory icon : USB memory connected

Bar to indicate the display range of zoom images against normal images Bar to indicate the alarm range against normal images

None : SD card not connected

None : USB memory not connected

indicates the image scroll speed.

: White/Black indicates 10 seconds.

: Green/Black indicates 10 seconds.

: White/Black indicates 1 minute.

: Green/Black indicates 1 minute.

: High frequency 1 : High frequency 2 : Low frequency 1 : Low frequency 2 : Mix A : Mix B : Mix C : Mix D : Fish school size

: Sea bottom-fixed zoom : Sea bottom discrimination zoom : Zoom : Bottom follow zoom : Bottom follow zoom with high frequency 1 : Bottom follow zoom with high frequency 2 : Bottom follow zoom with low frequency 1 : Bottom follow zoom with low frequency 2 : Individual gain, individual range, individual

shift and VRM operation are available.

: Individual gain operation is available : Individual range, shift and VRM operation are

available.

0093102002-03 1-13

Chapter 1

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00

3102002-0

1-1

CVS-FX2/FX2BB Chapter 2 Basic operation

Chapter 2 Basic operation

2.1 Switch screen images (Setting up of CM menu)

1

At setup of CM* If the setup of CM Menu is registered in [CM] keys, there is no need to operate CM Menu at every time of change of images. As for the details of [CM keys and the storing method into the [CM] keys, please see “Chapter 3 To make the best of [CM] keys”, p 3 - 1.

The main setup items in this chapter at this point are as follows:

2.1.1 Display of 1-frequency/displays of 2-frequency and more

Menu, images on screen can be switched over.

 Display of normal images  Change of frequency  Display of zoom images  Display of mixed images  Selection of pulse length  Selection of frequency bandwidth  Selection of changing method of gain

CVS-FX2/FX2BB can switch ON/OFF the display of 4-frequency images individually. To select Standard Echo Display:

1. Press [CM] key used ([CM] key lit red) When CM1 is lit red, press [CM1] key .

2. CM Menu is displayed.

3. Moving the cursor with key, select [Normal] or [OFF] of high frequency 1 in

Standard Echo Display items.

Standard Echo Display items

When [Normal] is selected, normal images are displayed on high frequency 1 screen. When [OFF] is selected, high frequency 1 screen is not displayed.

*1 CM (Condition Memory) : CM is the key to store the setting conditions of the echo sounder and to recall them by one

touch. There are 6 keys, CM1 to CM6, to store 6 types of setups.

0093102002-03 2-1

Chapter

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2-2

0093102

02-03

CV

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0093

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2-4

0093102

02-03

CVS-FX2/FX2BB Chapter 2 Basic operation

Setting up of frequency:

1. Relation between a transceiver and display screen

For CVS-FX2/FX2BB, there are two types of transceiver for high frequency and low frequency, and each transceiver has two channels of channel 1 and channel 2.

High frequency 1 is the channel 1 for high frequency. High frequency 2 is the channel 2 for high frequency. Low frequency 1 is the channel 1 for low frequency. Low frequency 2 is the channel 2 for low frequency.

2. Limitation in setting of high and low frequencies: In the case of a broadband transducer, the cable at high frequency side of the transducer

shall be connected to the high frequency terminal and the cable at low frequency side of transducer shall be connected to low frequency terminal.

The frequency range to be set has the following limitations per transducer.

Name of transducer Frequency range

of low frequency

TDM-052 38 to 75 kHz 130 to 210 kHz TDM-062 38 to 75 kHz 85 to 135 kHz

Caution: If the frequency setting exceeds the ranges above, gain will not be enough

to let the transducer perform to the designated specification.

Frequency range

of high frequency

When the other transducer than broadband type is connected, please connect the cable for low frequency of the transducer to the low frequency terminal and the cable for high frequency of the transducer to the high frequency terminal, and set the designated frequency of the transducer.

3. Simultaneous transmission and reception*

1

and alternate transmission and reception*2 Two transceivers for high frequency and low frequency transmit and receive simultaneously, and the channel 1 and channel 2 of each transceiver operate in alternate transmission and reception.

4. When the same frequency is set for high frequencies 1 and 2 or low frequencies 1 and 2, alternate transmission and reception do not operate. Transmission and reception are performed by only channel 1 and the image is displayed using the channel 1 data by the channel 2 gain setting.

5. The conditions when alternate transmission and reception can operate even when the same frequency is set for channels 1 and 2:

 If pulse width is different  If frequency bandwidth is different  If range is different.  If shift is different.  If the types of display zoom is different.

*1 Simultaneous transmission and reception: Each transmitter and receiver for high frequency and low frequency

*2 Alternate transmission and reception: Channels 1 and 2 of high frequency and channels 1 and 2 of low frequency

0093102002-03 2-5

operates simultaneously.

transmit and receive alternately by each channel. The image scroll speed will drop to a half of that of simultaneous transmission and reception

Chapter

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1. Press When

2. The CM

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Types of zoomed images

1. Bottom

Normal images

Bottom images

Zoom range bar

Sea bottom is fixed at 10% bottom of the screen, and the image above is displayed in the specified zoom range. As the image on sea bottom is magnified, this is an effective zooming mode to identify fish schools, etc. near the bottom.

Zoom range

0093102002-03 2-7

Chapter 2 Basic operation CVS-FX2/FX2BB

2. Bottom discrimination

Normal images

Bottom discrimination

Zoom range bar

Sea bottom is fixed at 30% bottom of the screen, and the image of bottom is displayed in the specified zoom range.

As the sea bottom image is magnified, this is an effective zoom mode to judge the sea bottom condition.

Zoom range

Expanded range

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Chapter 2 Basic operation CVS-FX2/FX2BB

4. Bottom zoom

Bottom zoom

Normal images

Mixed images above bottom in a specified zoom range are displayed onto the normal image.

This is an effective mode to identify fish schools, etc. near sea bottom with watching the geomorphic changes of sea bottom.

Zoom range

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2.1.4 Display of mixed images

Mixed images are combination of high and low frequency images by signal processing. The main purpose is to identify small fish, such as whitebait, from other fish school. There are 5 types for mixing methods and they are switchable in application.

Types of mixed images:

1. Mix type A Images in high frequency and low frequency are compared. The red level signal indicates high frequency images. For the signal at lower level than that, the high frequency signal is displayed in gray color. As fish schools with strong high frequency signal are highlighted, this is helpful for identification of fish schools near own boat’s position.

2. Mix type B Only when high frequency signal is stronger than low frequency signal, the low frequency signal is subtracted from the high frequency signal, and the difference is displayed with color gradation. The images existing only in high frequency are highlighted. Small fish such as whitebait can be displayed in high frequency, but not in low frequency. This is helpful, therefore, for identification of schools of small fish.

3. Mix type C Images in high frequency and low frequency are compared. The red level signal indicates high frequency images. For the signal at lower level than that, only when the high frequency signal is stronger than the low frequency signal, the low frequency is subtracted from the high frequency and the difference is displayed with color gradation. Strong signal with high frequency and images only in high frequency are highlighted. This is helpful, therefore, for identification of fish school near own boat and school of small fish such as whitebait.

4. Mix type D Signals of images of high and low frequencies are compared, and the stronger signal is displayed with color gradation. This is completely combined image of high and low frequencies. Without viewing of each of high and low frequencies images, only this one image can tell the conditions in water.

5. Fish size in fish school size Comparing signals of high and low frequencies, only signal with higher level of high frequency is displayed as difference in the order of strength, from red (strongest) to greenish yellow with color gradation. Low frequency images are indicated in greenish yellow to light blue with color gradation and the mixed image of them is displayed. For example, when high frequency is 200 kHz, the wavelength of underwater acoustic wave is 0.75 cm, and when low frequency is 50 kHz, the wavelength of underwater acoustic wave is 3.0 cm. In the image of low frequency 50 kHz, fish smaller than 3 cm is hardly detected. As school of small fish such as whitebait is clearly displayed in high frequency signal with short wavelength, only school of small size fish is displayed in warm color from red to greenish yellow in fish school mode. By this, it is easy to identify smaller size than 3.0 cm.

0093102002-03 2-15

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Chapter

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2.1.5 Selection of pulse length

Pulse length can be switched to 4 steps: of Short, Medium, Long and Fixed.

This change of pulse length causes changes in resolution of images from the echo sounder and the signal to be displayed changes. Shorter pulse length increases resolution, but its power decreases. Other way around, longer width decreases resolution but increases power. By this nature, the pulse length is switched depending on the range: to Short (narrow) at shallow range and to Long (wide) at deep range, except for the case of setting at [Fixed].

When pulse length is switched:

1. For the setup up of pulse length, based on the setup at [Medium] as reference, at [short], the pulse length is switched to the same pulse length as [Medium] pulse length with 1/2 of the range used, and at [Long], to the same pulse length as [Medium] pulse length with 1.5 times of the range used.

When signals in images of fish are not visible at the range used, setup at [Short] increases small response, and setup at [Long] highlights larger response while decreasing small responses.

2. When pulse length is set at [Fixed], the width is constant regardless of switching of range. Please set at [Fixed], to avoid change of response from fish by switching of range.

To select pulse length:

1. Press [CM] key (lights red) used. When CM1 is lit red, press [CM1] key .

2. CM menu is displayed.

3. Moving the cursor with , select [Short], [Medium], [Long] or [Fixed] of high

frequency 1 in Pulse Length items.

Pulse Length item

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Chapter 2 Basic operation CVS-FX2/FX2BB

2.1.6 Selection of frequency bandwidth

Frequency bandwidth can be switched to 4 steps: Narrow, Medium, Wide and Fixed. The change of frequency bandwidth results in change of the resolution of echo sounder and change of signals in the displayed images. If the frequency bandwidth is wide, the resolution becomes high. Other way around, if it is narrow, resolution becomes low. By this nature, the frequency bandwidth is switched depending on the range: to wide at shallow range and to narrow at deep range, except for the case of setting at [Fixed].

When frequency bandwidth is switched:

1. For the setup of frequency bandwidth, based on the setup at [Wide] as reference, at [Medium], the bandwidth is switched over to the same bandwidth of [Wide] bandwidth that is 1.5 times of the range used, and at [Narrow], to the minimum bandwidth. When size of target fish matches the frequency wavelength in use, setup up at [Medium] or [Narrow] highlights the images and increase visibility. When pulse length is set at [Short] and frequency bandwidth at [Narrow], response smaller than wavelength is reduced and noise reduction effect is expected.

2. When frequency bandwidth is setup at [Fixed], the bandwidth is constant regardless of switching of range.

To select frequency bandwidth:

1. Press [CM] key (lights red) used. When CM1 is lit red, press [CM1] key .

2. CM menu is displayed.

3. Moving the cursor with , select [Narrow], [Medium], [Wide] or [Fixed] of high

frequency 1 in frequency bandwidth items.

Bandwidth items

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0093102

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 

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2-26

0093102

02-03

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29.

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hen [Aut

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0093

102002-03

2-2

Chapter

2

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The range of zoome and “to ch

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2-28

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0093

102002-03

2-2

Chapter

2

g

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M

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Basic op

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Switchin [Scr. Indi

1. Press [

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.

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.

0093102

02-03

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0093

Cauti

the

102002-03

ll

Screens S

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2-31

Chapter

2

e

M

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e

h

t

S

c

[

a

V

k

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0

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Basic op

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C

S-FX2/F

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To regist

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▲] or [▼]

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.

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4. [Range

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e menu is

displayed.

Move the

ursor to [R

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keys

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.

0093102

02-03

CV

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displayed

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keys of

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lue increa lue decrea

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alue auto

ressed, th

tion, the pr

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sign smal

arranged, d [▼] for d

key.

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atically sh

menu ret

cedures 4

enu disa

er number

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pper digit.

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larger

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0093

102002-03

2-3

Chapter

2

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Basic op

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S-FX2/F

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To chang

1. When t

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2. When [

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When th

ranges:

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range is c

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2-34

0093102

02-03

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2. T

switch ov

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d) change

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0093

102002-03

2-3

Chapter

2

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S-FX2/F

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2.2.4 Ma

When Ra In the man with [All S The manu Dependan In [Numeri In [Range per range. In [Preset In [Range

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3. Press [

The he

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2-36

0093102

02-03

CV

S

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[▲] or [▼

5. P

ess [

0093

102002-03

] ke

of

.

2-3

Chapter

2

p

M

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Basic op

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C

S-FX2/F

2BB

6. [Shift O and sel

7. Press [ comple

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ect [

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te.

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nd the me

ditions in

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setup of

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th

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2-38

0093102

02-03

CV

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witch ove

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the shift

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operatio

1. P

2. T

3. P

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.

4. [S

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5. P

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0093

102002-03

] of

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2-3

Chapter

2

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[

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10 26

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Value] wit

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[▲] or [▼

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2-40

0093102

02-03

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Chap

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▼] keys of

.

3. P

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0093

102002-03

] ke

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2-41

Chapter

2

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Basic op

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C

S-FX2/F

2BB

4. [Range

keys o

5. Press [

Setup] of t

.

] key of

e menu is

.

displayed.

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ursor to [S

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[▼]

6. [Shift P

numeri

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7. When [

8. To set t

9. Press [

Hin

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reset1] of

values wi [◄] key, th

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key, th

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be moved be moved

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a shift ch

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0093

102002-03

2-4

Chapter

2

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Basic op

ration

C

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2BB

To switch

1. Each ti

The i

Shift

Shift at

Ico

ON/OFF o

e [SHIF

on showin

t [All Scre

[Scr. Indivi

for shift st

shift:

/M OFF] k

the shift c

ns Same] :

ual] : ON

atus

y is

nditions i

ON

pressed , t

header di

e shift is s

play chan

Shift :

itched on

es:

[OFF]

or off.

To switch

1. At the l

Range display

the opera

wer left sid

red) or

peration c

d.

Gain kno

ion scree

e of each s

(gree

an be perf

icon

for scree

creen, not

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rmed on t

(red

individu

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ed.

e screen

l shift:

yed or [G

here [Gai

(gre

in knob ic

knob ico

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-FX2/FX2

turn [Gai

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knob icon

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to

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s [GAIN-L

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Chap

SEL]

on]

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or the left

operatio

screen an

3. W

[Shi

1. If v

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2. P

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[Shift Sync

lues regar

for the se

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up on [F1]

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pressed,

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setup of [

[F2] keys,

[F2] key

x is displa

Gain knob

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] key

hift Type].

lease see

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icon] turns

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operation

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t range by

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increasing

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0093

102002-03

2-4

Chapter 2 Basic operation CVS-FX2/FX2BB

2.2.5 Adjustment of image gain

On CVS-FX2/FX2BB, gain of 4-frequency images can be adjusted individually. For gain adjustment, there are two modes: individual mode and synchronized mode. In the individual mode, the gain is adjusted individually on a selected operation screen. In synchronized mode, the gain on all screens are adjusted all together by one gain adjustment knob after gain adjustment is optimized individually for each screens. In the synchronized gain, the gain of all screens change keeping the gain difference between screens. On CVS-FX2/FX2BB, the gain of all screens including images in the past changes by operation of the gain knobs. Also, it can be switched to a mode in which only the gain of the current image changes, to watch changes by the gain operation.

If the gain is increased too much, there is too much noise to make distinctions with signs of fish. If the gain is decreased too much, images and fish signs become too faint to distinguish.

Adjust the gain to your preference while watching the image.

Too low Appropriate Too high

For gain adjustment (individual) per screen:

1. At CM1, press [CM1] key (lights red [CM1] key)

2. CM menu is displayed. Point the cursor to “Individual” of gain item with .

Gain item

2-46 0093102002-03

CV

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For

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key (lights

of gain p

single fre

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uency scr

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individual

en:

close CM

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Chap

menu.

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operatio

R

If

tu

 In

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an

[GAIN-R/S

gardless o

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the case o

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d the right

frequency

L]

The gain k

dual frequ

he left side

ide with [

operate w

s turned t

ob at the l

ncy scree

screen is

AIN-R/SE

ith [GAIN-

right, the

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/SEL]

gain incre

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the gain d

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0093

102002-03

2-4

Chapter

2

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Basic op

ration

C

S-FX2/F

2BB

When [

increas

 In the c

Regardl

and the

[GAIN-

AIN-L/SE

s, and wh

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/SEL]

] or [

n turned to

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left, the ga

en:

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en and the

] are

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right side

urned to ri

s.

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creen are

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with [GAI

perated wi

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th

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When [

increas

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until [G

can be ad

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s and whe

gain adju

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wer left of

]

turned to

tment at t

n]

e screens

creen are

and [GAI

left the gai

e center a

(red) ap

n which

displayed.

-R/SEL]

decrease

d the right

ears on th

(re

ar

.

side, pres

lower left

) or

turned t

[Gain-R/S

f the aime

(green)

right, the

EL]

screen.

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gain

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the gain o

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right scree

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To

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switch th

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switch th

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gain adj

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gain adju

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at the low

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stment at

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stment at

creen in

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left side

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IN-R/SEL

[G

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0093

102002-03

un

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il [Gain kn

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2-4

Chapter

2

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Basic op

ration

C

S-FX2/F

2BB

To adjust

The gain

(

When gai

to be adju

frequency

[Gain kno

When [G

frequency

the gain in

When the effective s or decrea

the gain:

an be adju

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knob is n

sted keep

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icon] of

IN-L/SEL]

1) or [G

creases, a

gain knob

reen and

e dependi

ted on the

played at t

t displaye

[GAIN-L/S

IN-R/SEL]

(red)

is t

-R/SEL]

d when tu

is turned,

ain value i

g on the o

screens o

he lower le

on the lo

L]

for r

ppears at

rned to th

in the

ned to the

ain adjust

indicated. eration.

which [Ga

t.

er left of t

pressed

ight side (H

he lower l

e right in

ight scree

eft, the gai

ent box i

The nume

in knob ico

e screen o

or the left

igh freque

ft of the ai

he left scr

(High fre

decrease

displayed ic value an

] of

which the

ide (Low

cy 2/High f

ed screen

en (Low

uency 2/Hi

.

in the app

d the progr

(red) or

gain is int

requency

requency 1

.

requency

gh frequen

licable ope

ess bar inc

nded

/Low

) until

/Low

y 1),

ation ease

t the

increases/

<Indicatio

C

ame time

ecreases

of gain va

2: ow frequenc

ution: Th

completio The gain

, indicatio

in the head

lues in hea

L1:

2 Low freq

gain adju

of operati

alue per s

of gai

er display

H2:

ency1 Hig

tment box

on. It also

reen is ref

values

lso increa

frequency2

automatic

isappears

ected in th

of the c

es or decr

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when the

header di

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ars after 5

enu key is

play.

g screen

seconds fr

pressed.

also

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s [CM1] ke

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(

t the sam

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time (sy

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chronized

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operatio

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menu is

ain item

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chronized

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At s

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for left s

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gain, oper

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et in [Syn s to

dicates th

tive scree

reen, [GAI

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to close

tion of on

at the sa

screen se

chronized],

(red).

screen w

s for VRM

-R/SEL]

M menu (li

gain knob

e time, by

individuall

[Gain kn

ere VRM

and [F1]/[F

for ri

ghts red [C

can chang

ncreasing/

.

b icon]

peration is

] keys, pr

ht screen.

M] key)

the gain f ecreasing

(red

valid and

ss [GAIN-

r maximu

with the s

at the lo

hen TVG

/SEL]

4 screen

me chang

er side o

is assigne

0093

102002-03

2-51

Chapter

2

a

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Basic op

ration

C

S-FX2/F

2BB

For gain

1. If [GAI display

This [S the gai

2. If [G

and if t

The gai referen

djustmen

-L/SEL] d.

nchronize

individuall

IN

-L/SEL]

rned to th

n of all scr

e.

aution: S

seconds the men

of all scr

or [G

Gain] bo

y set per e

or [G

left, the g

ens can b

nchronize from the key.

ens at sa

IN-R/SEL]

indicates

ch screen.

IN-R/SEL]

in decreas

changed

gain adj

ompletion

e time (s

is t

amount of

i

s.

simultane

stment b f operatio

nchronize

rned, the

change in

turned to

usly taking

x disappe

. It also di

):

Synchroni

value co

he right, th

the gain o

rs automa

sappears

ed Gain]

monly gi

e gain incr

each scre

tically afte

y pressing

ox is

en to

ases,

n as

5

of

The val the hea

L2: Low freq

ues of gain

der display

<Exa

ple of indi

L1: ency2 Low

per scree

ation>

Changing

frequency1

plus the a

the synch

H2:

High frequen

djusted val

onized gai

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ue of sync

to 1.0

2: ow frequenc

ronized g

L1:

2 Low frequ

in is indica

H2:

ency1 High

ed in

frequency2

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Typ

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s of gain

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hange:

Chap

er 2 Basi

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The that the

<Ex

To s

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he gain of ain of the

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all screens

urrent ma

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change t

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Current i

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the other

Gain 3 Gain

ages only

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Gain 10

1. P

2. T

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the cursor

to [System

with [▲] o

[▼] keys

f .

3. P

ess [

0093

102002-03

of

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2-5

Chapter

2

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Basic op

ration

C

S-FX2/F

2BB

4. [Syste

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5. Press [

] of the S

.

] key of

BMENU i

ystem

.

displayed

Gain

Move the

ype

cursor to [

Gain Type]

with [▲]

[▼]

6. [Gain T

Image]

7. Press [ set.

pe] of the

with [▲] or

Cau

ion: Whe

i

because

f previous

fter scroll

ENU] key

UBMENU

[▼] keys o

, an

the Gain

hat the dis

ype are dif

f one scre

is displaye

.

the SUB

ype is swit

lay metho

erent.

n, normal i

. Move th

ENU disa

hed, the c

of image

mages will

cursor to [

pears and

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for the s

be on displ

Retractive

the select

st images

itched gai

ay.

ain] or [C

d [Gain Ty

changes. type and

rrent

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his

hat

2-54

0093102

02-03

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In th

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Adjustm

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e charact

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between [

ection dep

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ting of [Str

s sensitivit

lower posi

ristics of pth and t

ctive, fish

ir depth is

ptimized]

nding on t

orption att

ngth], [De

Chap

due to at

ions are d

ultrasonic

equalize t

schools of

different.

nd [Manua

e depth, b

nuation d

pth] and [

er 2 Basi

tenuation,

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sound, to he gain of

the same

l].

ased on th

pending o

djust] to fit

operatio

s depth i

ronger an

correct th the image

ize can b

correctio frequenc

the image

To s

1. P

2. T

itch bet

ess [MEN

e menu is

een [Opti

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isplayed.

ized] and

.

ove the c

[Manual]:

rsor to [T

G] with [▲

or [▼] ke

s of

.

3. P

ess [

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] ke

of

.

2-5

Chapter

2

o

y

M

e

y

s

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u

s

T

V

[

a

G

X

0

m

Basic op

ration

C

S-FX2/F

2BB

4. [TVG]

of

f the men

.

u is displa

ed. Move

the cursor

to [TVG

ype] with

▲] or [▼]

keys

5. Press [

6. [TVG T

with [▲

7. Press [

] of

pe] of the

] or [▼] ke

ENU] key

.

menu is di

s of

, an

played. M

.

d the men

ve the cur

disappear

or and sel

and the s

ect [Manu

lected TV

l] or [Opti

is set.

ized]

2-56

0093102

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CVS-FX2/FX2BB Chapter 2 Basic operation

To use of optimized TVG:

 Optimized TVG corrects the reflected signal from shallower than the [Depth] where color is

produced with maximum level. This is done by having room for gain adjustment, in reference to the diffusional attenuation and absorption attenuation of ultrasonic sound.

 By optimized TVG, unnecessary reflection such as noise is eliminated, and necessary

reflection from single fish and fish schools is clearly displayed at the same sensitivity regardless of their depth.

 As optimized TVG always corrects optimized TVG, no adjustment is basically needed. Only

fitting to a desired gain with a gain knob is required. However, when it is felt that the gain is short due to the excess correction of TVG for shallower range, please adjust to a desired gain by changing the [Adjust].

Without TVG Optimized TVG

When adjustment is needed due to excess TVG correction for shallower range:

There are two ways of TVG adjustment: to adjust in the main menu and to assign [F1]/[F2] keys to adjust by the function keys.

0093102002-03 2-57

Chapter

2

M

n

f

e

s

m

d

t

e

t

▼

s

V

X

0

]

Basic op

ration

C

S-FX2/F

2BB

To adjust

1. Press [

2. The me

TVG Adju

ENU] key

u is displa

t in main

.

yed. Move

enu:

he cursor

o [TVG] wi

h [▲] or [

] keys of

.

3. Press [

4. [TVG] o

of

] key of

the menu

.

is displaye

. Move th

cursor to

TVG Adju

t HF1] with

[▲] or [▼

keys

5. Press [

2-58

] key of

.

0093102

02-03

CV

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gicoTh[TV

]

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9

d

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b

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6. [

-FX2/FX2

VG Adjust

BB

HF1] of t

e menu i

displayed

. Set [TV

Chap

Adjust H

er 2 Basi

1] by incr

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asing an

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7. P

8. T

To a

1. At

2. P

3. T

creasing th

With [▲ With [▼

ess [SUB

set the ne

just TVG

first, assig

for the se

ys ([F1]/[F

ess [F1] k

e [TVG Ad

e numeric

key, the v key, the v

ENU] key

t [TVG Adj

Adjust wit

[MENU]

tup metho

])”, p 4 - 2

y o

ust XXX] b

alue with [

lue increa lue decrea

to r

ust HF2], r

[F1]/[F2]

ey

of [F1]/[F

[F2] key

ox is displ

▲] or [▼]

es.

ses.

turn to [TV

peat the p

keys:

r [F2] key

] keys, see

.

yed.

eys of

].

rocedures

with

“4.2.2

ss

.

to 7.

[TVG].

gn intende

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to functio

4. S

W

hen the lef

ri

lect the sc

ht hand s

n]

e title displ

G Adjust

Caution

gain s

een for ad

hand scr

reen is to

blinking at

ay of [TVG

F1] [TVG

: [Gain kno

tting is [In

ustment o

en is to b

be select

the lower l

Adjust XX

djust HF2

icon] at th

ividual] an

TVG.

selected,

d, press [

ft on the s

] box chan .

lower left

to

press [G

AIN-R/SE

reen to be

ges to [TV

f the scree

(red) when

-L/SEL]

]

operated.

Adjust LF

changes t

[Synchroni

, an

to show

1] [TVG Ad

(

ed].

when th

[Gain kno

ust LF2] o

red) when

0093

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Chapter

2

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S

e

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s

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u

f

l

h

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y

X

k

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A

m

V

u

]

a

X

0

s

Basic op

ration

C

S-FX2/F

2BB

5. Adjust t

With With

6. Press [ disapp

Ca

To adjust

There ar keys to ad

<Example

e numeric [▲] key, th

[▼] key, th

UBMENU] ars.

tion: [TV

of a key.

with man

two ways

ust by the

of manua

value with

e value inc e value de

key

Adjust X

al TVG:

of TVG ad unction ke

TVG imag

▲] or [▼]

eases. reases.

r [MENU]

X] box aut

ustment: t

s.

es>

eys of

key ,

matically

adjust in

to se

and [TVG

isappears

he main

[TVG Adj

djust XXX

seconds

enu and to

st HF1].

] box

after relea

assign [F1

e

]/[F2]

Wit

out TVG

Man

al TVG

2-60

0093102

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Tke

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y

a

i

e

M

t

u

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t

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c

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]

To

1. P

-FX2/FX2

anually a

ess [MEN

BB

just TVG i

] key

n main m

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nu:

Chap

er 2 Basi

operatio

2. T

3. P

ess of [

4. [

VG] of the

e main me

]

nu is displ

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menu is d

yed. Move

.

splayed.

the cursor

ove the c

o [TVG] wi

rsor to [T

h [▲] or [

G Strength

] keys of

HF1] with

.

[▲] or [▼

5. P

ys of

ess [

] ke

.

of

.

0093

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2-61

Chapter

2

t

S

e

a

[

h

[

a

[

t

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1

u

U

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1

u

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p

a

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s

▼

e

s

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j

V

u

b

X

0

e

Basic op

ration

C

S-FX2/F

2BB

6. [TVG S

[▲] or [

With With

7. Press [

8. Point th

9. Press [

10. [TVG

decre

With With

rength HF1

▼] keys of

[▲] key, th [▼] key, th

UBMENU]

cursor to

] key of

Depth HF

sing the n

[▲] key, th [▼] key, th

] of the me

to s

e value inc e value de

key

[TVG Dept

.

] of the

meric valu

e value inc e value de

nu is displ

et [TVG St

eases. reases.

to return

HF1] with

enu is dis

e with [▲]

eases. reases.

yed. Incre

ength HF1

to [TVG].

[▲] or [▼]

played. S

[▼] key

se or decr

.

keys of

t [TVG D

of .

ase the n

.

pth HF1]

meric valu

y increasi

with

g or

11. Press

12. Point t

13. Press

14. [TVG

decre

With With

SUBMEN

e cursor t

] key of

Adjust HF

sing the n

[▲] key, th [▼] key, th

] key

[TVG Adj

.

] of the

meric valu

e value inc e value de

to return t

st HF1] wi

enu is dis

e with [▲]

eases. reases.

[TVG].

h [▲] or [

played. S

[▼] key

] keys of

t [TVG Ad

of .

.

ust HF1]

y increasi

g or

15. Press

16. For se

2-62

SUBMEN

ting of the

] key

next TVG,

to return

epeat the

to [TVG].

rocedures

4 to 15.

0093102

02-03

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S

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d

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To

1. At

-FX2/FX2

anually a

first, assig

BB

just TVG

[MENU]

ith [F1]/[

ey

2] keys:

r [F2] key

with

Chap

[TVG].

er 2 Basi

operatio

2. P

3. T

4. S

bl

T

for the se

ys ([F1]/[F

ess [F1] k

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ch time [

ong [TVG

[TVG

lect the sc

hen the sc

reen at th

inking at th

e title dis

VG XX HF

ting metho

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y or

ent box is

1] key or

Strength],

Strength]

een to per

reen at the

right sid

e lower left

lay of TV

1] and [TV

of [F1]/[F

F2] key

isplayed.

[F2] key is [TVG Dept

orm TVG

left side is

is select

of the scre

djustment

XX HF2].

] keys, se

.

pressed,

] and [TV

[TVG De

djustment.

selected,

d, press [

en to be a

ox will ch

“4.2.2 As

he TVG a

Adjust]. S

th]

ress [GAI

AIN-R/S

justed.

nge to [TV

ign intende

justment

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-L/SEL]

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XX LF1]

d operatio

ox will sw

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, an

make

and [TVG

to functio

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.

d when th

(red

X LF2], o

5. In

t

6. P disappears

Caution: [

gain sett

the case

e numeric

With [▲] With [▼]

ess [SUB

Cautio

rele

ain knob i

ing is [Indivi

f [TVG Str

value with

ey, the val ey, the val

ENU] key

.

: [TVG S

se of a ke

on] at the l

dual] and t

ngth HF1]

▲] or [▼]

e increas e decreas

or [

rength XX

.

wer left of t

(r

set [TVG

eys of

s

ENU] key

] box au

he screen c

d) when [S

trength H

.

, an

omatically

anges to

nchronize

1] by incr

[TVG Stre

disappear

(re

].

asing and

ngth XXX]

5 secon

) when

decreasin

ox

s after

0093

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Chapter

2

c

S

a

c

[

p

a

e

V

h

G

h

U

G

H

c

o

g

c

X

T

]

t

d

G

n

G

V

r

X

0

n

s

Basic op

ration

C

S-FX2/F

2BB

7. In the

numeri

With With

8. Press [ disappe

C

9. In the c

numeri

ase of [T

value wit

[▲] key, th [▼] key, th

UBMENU]

rs.

ution: [TV

of a key.

se of [TV

value wit

G Depth

[▲] or [▼]

e value inc e value de

key

Depth X

Adjust Hi

[▲] or [▼]

F1], set [

keys of

eases. reases

r [MENU]

X] box au

h 1], set [

keys of

VG Depth

.

key

omatically

VG Adjus

.

HF1] by in

, and [TV

isappears

HF1] by i

creasing o

Depth XX

5 seconds

creasing o

decreasi

] box

after relea

r decreasi

g the

e

g the

With With

10. Press

disap

C

[▲] key, th

[▼] key, th

SUBMEN

ears.

ution: [TV

of a key.

e value inc e value de

] key

Adjust X

eases. reases.

or [MENU

X] box au

] key

omatically

, and [TV

disappears

Adjust X

5 seconds

X] box

after relea

e

2-64

0093102

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CVS-FX2/FX2BB Chapter 2 Basic operation

(Dep

)

To manually correct TVG:

The reflected signals of echo sounder have less sensitivity due to attenuation, as depth is deeper. In the TVG correction for CVS-FX2/FX2BB, a reference point of depth for correction is to be determined. This reference point is [TVG Depth]. Reflected signals from a shallower depth than this reference point are corrected to have the same sensitivity as that of the reference point. In [Strength], the amount of change in this correction is set. The larger the value of [Strength] becomes, the larger the amount of change becomes. (See the figure below) For reflected signals from shallower positions, amount of correction becomes larger. When [Strength] is set large, the correction amount for shallow depth may seem too much. In such cases, if the [Adjust] is set at the depth at which correction seems too much, the correction amount at shallower depth than the depth becomes the same as the correction amount at the starting position, and can set off the over correction.

Setting should be performed in combination of the items above.

Adjustment of TVG strength of manual TVG:

[TVG Strength] decides the amount of change for TVG correction. The larger the value of [TVG Strength] is, the bigger the amount of change is.

Change in TVG correction by change in strength

0

10 20 30 40 50

0

th 140 m/Adjust 1 m

TVG correction (-dB)

20

40

60

Depth (m)

80

100

1 5 10 15 20 25 30 35 40 45 50

120

140

The far left side line is Strength 1 and the far right side line is Strength 50 in the graph.

0093102002-03 2-65

Chapter 2 Basic operation CVS-FX2/FX2BB

t

Adjustment of TVG Depth of manual TVG

[TVG Depth] is the reference point of depth for correction. The deeper the setup becomes, the wider the correction range becomes.

Change in TVG correction by change in depth

010203040 50

0

20

(Strength 50/Adjust 1 m)

TVG correction (-dB)

40

Depth (m)

60

80

140m 120m 100m 80m 60m 40m 20m

Adjustment of TVG Adjust (start point) of manual TVG

[TVG Adjust] adjusts the excessive correction by TVG against shallow signals, making the amount of correction at the point shallower than the start point to be the same correction amount at the start point.

Change in TVG correction by change in adjus

0

20

40

60

Depth (m)

80

(Strength 50/Depth140m)

TVG correction (-dB)

01020 30 40 50

60m 50m 40m 30m 20m 10m 1m

100

120

140

The far left line is at correction depth 20 m, and the line at far right is at correction depth 140 m in the graph.

100

120

140

The far left line is at correction depth 60 m, and the line at far right is at correction depth 1 m in the graph.

2-66 0093102002-03

CVS-FX2/FX2BB Chapter 2 Basic operation

1

2.3 Changing of the image scroll speed

The image scroll speed can be changed at 14 steps of [Speed -2], [Speed -1], • • • [Stop], [Speed 2], • • • [Speed 9]. The larger the speed number is, the slower the image scroll speed becomes.

The image scroll speed of echo sounders is faster for shallow ranges and slower for deeper ranges depending on the display ranges.

When the image speed at shallow ranges seems too fast, [Image Speed] is used to make the speed slower.

When sea bottom is bedrock and has strong reflection strength, the multipath reflection between seawater surfaces remains as reverb and may display false image*1. To eliminate the false images, the image scroll speed may be slowed down to wait the next transmission and reception until the reverb disappears.

The scroll of images can be stopped.

Speed 0 : The image scroll speed is 2 times faster by enlarging the original image 2 times. Speed -2: The image scroll speed is 4 times faster by enlarging the original image 4 times.

To change image scroll speed:

1. Press [Image Speed] key .

[Image Speed] adjustment box is displayed.

Speed -2 4 times faster Speed -1 3 times faster

Speed 0 2 times faster Speed 1 1.5 times faster Speed 2 Normal speed Speed 3 Speed 4 Speed 5 Speed 6 Speed 7 Speed 8 Speed 9

The image speed

becomes slow in order.

To speed up image scroll speed:

1. While [Image Speed] adjustment box is displayed, press [Image Speed] key .

Move upward the cursor, and [Image Speed] is set to a faster speed.

*

False image: When sea bottom material is bedrock with high reflection ratio of ultrasonic sound, the reflected signals at

the sea bottom are reflected by the seawater surface and again by the sea bottom. This may be repeated many times. This repeat of reflection remains as reverb. If the reverb remains at the next transmission and reception, the image is a mixture with normal reflection and the reverb. This reverb is called as false images.

0093102002-03 2-67

Chapter 2 Basic operation CVS-FX2/FX2BB

To stop image scroll:

1. While [Image Speed] adjustment box is displayed, move the cursor to [Stop] with [▲ ] key

of .

When the cursor is at [Speed 2 (1/1)], press [Image speed] key , and the cursor moves to [Stop].

To slow down image scroll speed:

1. While [Image Speed] adjustment box is displayed, move the cursor downward with [▼] key

of , and [Image Speed] is set to a slower speed.

To wipe out false images:

1. While [Image Speed] adjustment box is displayed, move the cursor one step down with [▼]

key of to observe images.

While false images remain, move the cursor one more step down and observe the image.

Repeat this operation and adjust the image speed by making slower until the false images disappear.

2-68 0093102002-03

CVS-FX2/FX2BB Chapter 2 Basic operation

2.4 Finding out depth of targets in images (VRM operation)

VRM (Variable Range Marker) is a mobile marker to measure the depth of targets such as fish

schools, and indicates lines and depth values of the lines.

This can be also used as an indication of depth for casting net, etc.

VRM can display the second VRM set at a certain interval under the first VRM. This second VRM follows the movement of the first one with the interval. This can be used as a measure for depth of casting net.

There are two modes: to display on only one screen of the 4 frequencies and to display across the all 4 screens.

In the display on the whole screen mode, the same depth is indicated on all screens at synchronized range/shift. Display and operation can be done on each screen at individual range/shift.

VRM 1 line VRM VRM 2 lines VRM

VRM 1 line VRM VRM 2 lines VRM

0093102002-03 2-69

Chapter

2

a

t

c

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M

n

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V

,

e

a

y

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V

p

v

t

(

n

e

t

n

h

M

S

g

y

d

t

V

a

▼

X

0

w

n

Basic op

ration

C

S-FX2/F

2BB

<Example

2.4.1 Ch

Under the movemen depth for

of display

VRM

nging of

first VRM

of the first

asting a n

f VRM wh

1 line

RM follow

another

VRM kee

t.

le screen

interval

RM with i

ing the int

Screen ind

terval ca

rval, and t

ividual ran

be displa

is is inten

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RM 2 lines

V

ed. This

ed to use

RM follo s a guida

s the

ce of

To chang

1. Press [

2. The me

the displ

ENU] key

u is displa

yed inter

.

ed. Move

al of the s

he cursor

econd VR

o [Display

:

etup 2] wi

h [▲] or [

] keys of

.

3. Press [

2-70

] key of

.

0093102

02-03

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S

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a

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c

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]

a

l

4. T

-FX2/FX2

e menu [

BB

isp. setup

] is displa

ed. Move

the cursor

Chap

to [VRM In

er 2 Basi

terval] with

operatio

[▲] or [▼

5. P

6. T

eys of

ess [

] ke

e menu [

.

of

RM Inter

.

al] is disp

layed. Set

an interv

l by incre

sing or d

creasing

n

7. P

meric valu

With [ ] With [ ] With [▲] With [▼]

ess [MEN

i

set.

e with [▲]

ey, the digi

ey, the val ey, the val

] key

[▼] keys

can be m

e increas e decreas

, and the

.

o

ved to larg

ved to sm

s.

menu dis

er side.

ller side.

ppears an

the select

d VRM fol

low interva

0093

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Chapter

2

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M

n

e

V

l

S

v

d

t

M

e

R

V

X

0

o

Basic op

ration

C

S-FX2/F

2BB

2.4.2 Op

To switch

1. Press [

2. The me

ration of

RM disp

ENU] key

u is displa

RM in Act

ay to Acti

.

yed. Move

ve Screen

e Screen:

he cursor

o [Disp. S

tup 2] with

[▲] or [▼]

keys of

.

3. Press [

4. The m

keys of

] key of

nu [Disp.

.

etup2] is

isplayed.

ove the c

ursor to [V

M Image]

with [▲]

[▼]

5. Press [

2-72

] key of

.

0093102

02-03

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S

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r

m

▼

p

s

m

▲

p

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A

a

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6. T

7. P

Ope

To

-FX2/FX2

e menu [V lect [Activ

ess [MEN

ation of

ove VRM

BB

RM Image]

Screen] a

] key

RM:

ownward

is display

d [All Sc

, and the

:

d. Move th

ens].

enu disa

cursor wi

pears and

Chap

h [▲] or [

he selecte

er 2 Basi

] keys of

VRM ima

operatio

, an

e is set.

If [

displ

ayed in do

Kee

Whe

n the seco

n it comes

Whe adju

To

If [

displ

ayed in do

Kee

Whe

n the seco

Whe

n it comes

adju

To

] of

pressing

tment of t

ove VRM

】of

pressing

tment of t

ove VRM

is presse

ble sized

▼], and V

d VRM is

near the a

e position

pward:

is presse

ble sized

▲],and V

d VRM is

near the a

e position

mage to

, the line

haracters.

M moves

isplayed, t

imed positi

an be don

, the line

haracters.

M moves u

isplayed, t

imed positi

an be don

ctive Scre

f VRM is

ownward.

he second

on, releas

.

f VRM is

pward. Th

he second

on, releas

.

n:

ighlighted

he displa

RM also

the key.

highlighted

display of

RM also

the key.

with black

of value is

oves simu

nd by pre

with black

alue is up

oves simu

nd by pre

edge and

updated a

ltaneously

sing a few

edge and

ated at th

ltaneously

sing a few

its value i

the depth.

downward.

times, fin

its value i

depth.

upward.

times, fin

To s

elect the l

[G

I

N-R/SEL]

oper

ated.

ft screen,

, an

press [G

display

IN-L/SEL]

(red

and

blinking a

o select t

the botto

e right sc

of the s

een, pres

reen to b

aution: [G

setting is

ain knob ic

Individual]

n] at the b

nd to

ttom of scr

(red) wh

en change

n [Synchr

to

nized].

(red) whe

n gain

0093

102002-03

2-7

Chapter

2

e

M

n

►

e

V

S

A

d

s

t

M

e

[

R

V

k

X

0

o

Basic op

ration

C

S-FX2/F

2BB

2.4.3 Op

To switch

1. Press [

2. The me

ration of

over VRM

ENU] key

u is displa

RM on all

Image to

.

yed. Move

Screens

ll Screen

he cursor

:

o [Disp. S

tup2] with

▲] or [▼]

eys of

.

3. Press [

4. The m

keys of

] key of

nu [Disp.

.

etup2] is

isplayed.

ove the c

ursor to [V

M Image]

with [▲]

[▼]

5. Press [

2-74

] key of

.

0093102

02-03

CV

S

h

u

r

m

c

p

h

s

m

c

p

s

m

e

a

s

n

V

U

o

u

n

h

o

u

[

n

h

m

f

e

m

k

e

h

n

d

c

e

h

R

d

c

p

a

y

c

e

n

o

h

e

a

V

u

h

e

N

n

g

w

V

e

h

e

V

e

s

w

e

n

d

i

d

m

A

t

m

A

g

h

t

S

c

e

d

a

s

S

h

m

c

a

R

d

R

e

v

r

c

w

n

5

e

s

e

s

e

,

s

e

6. T

-FX2/FX2

e menu [

BB

RM Image

] is display

ed. Select

[Active Scr

Chap

en] [All S

er 2 Basi

reens] by

operatio

moving th

c

7. P

ess [MEN

Ope

To

Pres

s [▼] of

ated in do

indi

Kee dept

n the seco

Whe Whe

n it comes

adju

rsor with [

ation of V

ove VRM

pressing

.

tment of t

▲] or [▼]

] key

RM:

f [All Scr

, and

ble sized c

[▼] key, a

d VRM is near the a

e position

eys of

, and the

ens] dow

the line of

aracters.

d VRM m

isplayed, t

imed positi

an be don

.

menu disa

ward:

VRM is hi

ves down

he second

on, releas

.

ppears an

hlighted w

ard. The

RM also

the key.

the select

th black e

isplay of v

oves simu

nd by pre

d VRM Im

ge and V

alue is up

ltaneously

sing a few

ge is set.

M value i

ated at th

downward.

times, fin

To

ove VRM

Pres

s [▲] of

indi

ated in do

Kee

pressing

Whe

n the seco

Whe

n it comes

adju

ove VRM I

To

to s

lect the le

[GAI

N-R/SEL]

oper

ated.

tment of t

Caution:

screen VRM i

f [All Scr

, and t

ble sized c

▲] key, V

d VRM is near the a

e position

At [All Scr

moves si

dividually

age to an

t screen,

, to

ens] upw

e line of

aracters.

M moves

isplayed, t

imed positi

an be don

ens Same

ultaneousl

oves per A

active scr

ress [GAI

display

rd:

RM is hig

pward. Th

he second

on, releas

.

(range)] a . At [Scr. In

tive Scree

en at [Scr

-L/SEL]

(red)

lighted wi

display of

RM also

the key.

d [All Scr

dividual (ra

.

en individu

and

linking at

h black ed

value is up

oves simu

nd by pre

ens Same

ge)] and [

al range]/[

to select t

the botto

ge and V

dated at th

ltaneously

sing a few

(shift)], VR

cr. Individu

creen indi

e right sc

of the s

M value i

depth.

upward.

times, fin

M on all

l (shift)],

idual shift]

een, pres

reen to b

0093

Caution:

setting

102002-03

[Gain knob

is [Individu

icon] at the

l] and to

bottom of

(red)

creen chan

hen [Sync

es to

ronized].

(red)

hen gain

2-7

Koden CVS-FX2BB, CVS-FX2 Basic Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual