Koden CVS-FX1 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-FX1 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 : 24 Jun. 2011 Document No. 71-2731U-X002 N.B. As this product is for Maritime use compliance with Directive 72/23/EEC is not required.

CVS-FX1 Document Revision History

0093101112-02 i

CVS-FX1 Basic Operational Manual Doc No. 0093101112

Document Revision History

No. Doc. No-Rev. No. Date revised

(Y/M/D) Revised content

0 0093101112-00 2011/11/09 First edition

1 0093101112-01 2014/03/10 Revision: (From software KM-F11 Ver. 1.01 34 to Ver. 1.** **)

2 0093101112-02 2014/04/11 Revision: (From software KM-F11 Ver. 1.01 35 to Ver. 1.** **)

3

4

5

6

7

8

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.

© 2011-2014 Koden Electronics Co., Ltd. All rights reserved.

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.

Important Notice CVS-FX1

ii 0093101112-02

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.

CVS-FX1 For Your Safe Operation

0093101112-02 iii

For Your Safe Operation

Pictograms 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 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

devices when dealt with incorrectly.

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

Precautions on equipment

Be careful of high voltage inside High voltage, which may risk you life, is used. This high voltage may 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.

Warning

Warning

Caution

Warning

For Your Safe Operation CVS-FX1

iv 0093101112-02

Caution on location of installment 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.

Precautions on handling

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.

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.

Caution

Caution

Caution

Warning

Warning

Caution

Caution

Caution

CVS-FX1 Contents

0093101112-02 v

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 ............................................................................................................................ 1-3 1.2.3 Power Voltage Alarm .......................................................................................................... 1-3

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 sounder02732697" ................................................................................... 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

Contents CVS-FX1

vi 0093101112-02

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 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

CVS-FX1 Introduction

0093101112-02 vii

Introduction

CVS-FX1 is an LCD color echo sounder that can display images in 4 optional frequencies.

This unit equipped with the latest digital process can accurately display circumstances in the water under all conditions, with a good match with the high brilliance 12.1 inch LCD.

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.

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.

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

Sona-ToneTM (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)

By flush mounting, the unit can be easily installed from the front side.

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).

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Chapter 1 Preparation CVS-FX1

1-6 0093101112-02

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

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CVS-FX1 Chapter 1 Preparation

0093101112-02 1-9

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CVS-FX1 Chapter 1 Preparation

0093101112-02 1-11

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. Header display

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

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

3 Shift mode icon Shift: All screens same Shift: Scr. Individual

Shift off 4 Range mode icon All screens same

Scr. Individual

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

109

6 7 8 5 4 3 2 1

11

12

Chapter 1 Preparation CVS-FX1

1-12 0093101112-02

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 CM1 on display

CM2 on display

CM3 on display

CM4 on display

CM5 on display

CM6 on display 7 Alarm setting status : Bottom Alarm ON

: Fish Alarm ON : Speed Alarm ON : Arrival Alarm ON : XTE Alarm ON : Water Temp Alarm ON No display: No Alarm activated

8 [EVENT] key status (indicates the settings)

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

9 Image scroll speed : High speed : Stop : Normal (1/1) : Low speed

10 [F1]/[F2] key status icon (indicates the settings)

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

CVS-FX1 Chapter 1 Preparation

0093101112-02 1-13

Display portion of echo sounder images

No. Name Description 11 Time marker indicates the image scroll speed.

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

: White/Black indicates 10 seconds. : Green/Black indicates 10 seconds. : White/Black indicates 1 minute. : Green/Black indicates 1 minute.

12 Image title : High frequency 1

: High frequency 2

: Low frequency 1

: Low frequency 2

: Mix A

: Mix B

: Mix C

: Mix D

: Fish school size

Numerical value: Frequency 13 Color Bar Scale Scale for color representation of images by echo

sounder 14 Zoom image title : 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 15 Gain knob icon : Individual gain, individual range, individual

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

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

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

Chapter 1

1-14

1.6 Adjust

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CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-1

Chapter 2 Basic operation

2.1 Switch screen images (Setting up of CM menu)

At setup of CM*1 Menu, images on screen can be switched over. 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: 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

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

CVS-FX1 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.

Chapter 2

2-2

4. Pres

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12-02

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CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-5

Setting up of frequency: 1. Relation between a transceiver and display screen

For CVS-FX1, 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

Frequency range of high frequency

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

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.

Caution: If the frequency setting exceeds the ranges above, gain will not be enough to let the transducer perform to the designated specification.

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

*2 Alternate transmission and reception: Channels 1 and 2 of high frequency and channels 1 and 2 of low frequency transmit and receive alternately by each channel. The image scroll speed will drop to a half of that of simultaneous transmission and reception

Chapter 2

2-6

2.1.3 Disp

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CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-7

Types of zoomed images

1. Bottom

Normal images

Bottom images

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

Zoom range bar

Chapter 2 Basic operation CVS-FX1

2-8 0093101112-02

2. Bottom discrimination

Normal images

Bottom discrimination

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 bar

Expanded rangeZoom range

CVS

0093

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101112-02

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Chapter 2 Basic operation CVS-FX1

2-10 0093101112-02

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

CVS

0093

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101112-02

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Chapter 2

2-12

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00931011

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CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-15

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.

Chapter 2

2-16

To display

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Chapter 2

2-18

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CVS

00931011

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S-FX1

12-02

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CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-19

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

Chapter 2

2-20

4. Press [E

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Chapter 2 Basic operation CVS-FX1

2-22 0093101112-02

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 up 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.

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2-23

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Chapter 2

2-24

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Chapter 2

2-26

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CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-27

When [Auto Range] is set, [Auto Range] is displayed in the header showing Range Mode.

When [Manual] is set, display of the header showing the Range Mode disappears.

When [Auto Shift] is set, [Auto Shift] is displayed in the header showing Range Mode.

As for the details of [Auto Range], see “4.3.2 Setting of auto range”, p 4 - 4.

As for the details of [Manual], see “2.2.3 Manual change of a range for normal image”, p 2 - 29.

As for the details of [Auto Shift], see “4.3.3 Setting of auto shift”, p 4 - 6

Chapter 2

2-28

2.2.2 Swit

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2-29

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9

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Chapter 2

2-30

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2-31

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Chapter 2

2-32

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2-33

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Chapter 2

2-34

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2-35

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Chapter 2

2-36

2.2.4 Man

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2-37

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7

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Chapter 2

2-38

6. [Shift Opand sel

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2-39

.

or [▼] keys

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9

s

Chapter 2

2-40

6. [Shift Ty

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S-FX1

101112-02

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c operation

2-41

reset8] can

tered range

tered range

is specified

nge:

.

n

n

e

e

d

Chapter 2

2-42

4. [Range

keys of

5. Press [

6. [Shift P

numeric

With With With With

7. When [S

8. To set th

9. Press [M

Hinnuis f

2 Basic op

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f .

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peration

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key

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to 7.

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CVS

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CVS

0093

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S-FX1

101112-02

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c operation

2-43

to .

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n

3

h

f

Chapter 2

2-44

To switch

1. Each tim

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S-FX1

101112-02

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2-45

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n

5

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Chapter 2 Basic operation CVS-FX1

2-46 0093101112-02

2.2.5 Adjustment of image gain

On CVS-FX1,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-FX1, 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.

<Example of gain adjusted images>

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

CVS

0093

3. Pr

4. Pr

For a

In

Re

If

tur

In

Th

an

S-FX1

101112-02

ress [ENT] k

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adjustment

the case of

egardless of

[GAIN-R/SE

rned to left.

the case of

he gain for t

d the right s

key .

key (lights r

t of gain pe

f single freq

f frequency,

EL] i

The gain kn

f dual freque

he left side

side with [G

red [CM] ke

er screen (

quency scre

, operate w

is turned to

nob at the le

ency screen

screen is o

GAIN-R/SEL

ey) to

(individuall

een:

ith [GAIN-R

o right, the

eft side is in

n:

operated wit

L]

o close CM

ly):

R/SEL]

gain incre

nvalid.

th [GAIN-L/S

.

Chapt

menu.

.

ases, and

SEL]

ter 2 Basic

the gain d

c operation

2-47

ecreases if

n

7

f

Chapter 2

2-48

When [G

increase

In the ca

Regardle

and the g

[GAIN-R

The gainknob ico

When [G

increase

To switch

until [Ga

2 Basic op

GAIN-L/SEL

es, and whe

ase of 3-freq

ess of frequ

gain at the

R/SEL]

n can be adon] on the lo

GAIN-L/SEL

es and when

h gain adjus

ain knob ico

peration

L] or [G

en turned to

quency scre

uency, the g

center scre

.

justed of thower left of s

L]

n turned to

stment at th

n]

GAIN-R/SEL

left, the ga

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ain at left s

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e screens oscreen are d

and [GAIN

left the gain

he center an

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in decrease

ide screen

right side s

on which displayed.

N-R/SEL]

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turned to rig

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screen are o

(red

are

s.

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with [GAIN

operated wi

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s [Gain-R/SE

of the aimed

CVS

00931011

n

N-L/SEL]

th

(green)

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EL]

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S-FX1

12-02

,

[Gain

gain

CVS

0093

In

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Hig

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If [

an

To

[GA

aim

To

[GA

aim

S-FX1

101112-02

the case of

egardless of

erated with

gh frequenc

he gain can

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[GAIN-L/SE

d if turned t

switch the

AIN-L/SEL]

med screen

switch the

AIN-R/SEL]

med screen

f 4-frequenc

f frequency

h [GAIN-L/S

cy 1) with [G

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.

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.

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ted of the s

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or [GAIN-R/

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til [Gain kno

of two left sc

and the ga

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screen in w

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/SEL]

reases.

left side (

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right side (

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creens (Low

ain of two

which [Gain

creen.

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High freque

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Chapt

w frequency

right screen

n knob icon

d to the righ

ency 2/Low

d) appears

ency 2/High

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ter 2 Basic

y 2/Low freq

ns (High fr

n] of

ht, the gain

w frequency

at the lowe

h frequenc

at the lowe

c operation

2-49

quency 1) is

equency 2/

(red) or

n increases,

y 1), press

er left of the

y 1), press

er left of the

n

9

s

/

r

,

s

e

s

e

Chapter 2

2-50

To adjust

The gain c

(g

When gain

to be adju

frequency

[Gain knob

When [GA

frequency

the gain in

When the effective scor decreas

At the sincreases/d

<Indication

LL

Ca

2 Basic op

the gain:

can be adjus

green) is dis

n knob is no

sted keep

1) and [GA

b icon] of

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same timedecreases

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L2: Low frequency

aution: ThecompletionThe gain v

peration

sted on the

splayed at t

ot displayed

[GAIN-L/SE

IN-R/SEL]

(red) a

is tu

N-R/SEL]

nd when tur

is turned, ggain value isng on the op

, indicationin the head

lues in head

L1: y2 Low frequ

e gain adjusn of operativalue per sc

screens on

he lower lef

d on the low

EL]

for ri

appears at t

urned to th

in the r

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gain adjustms indicated. peration.

n of gainer display a

der display>

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stment box on. It also dcreen is refl

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ft.

wer left of th

pressed f

ight side (H

the lower le

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right screen

left, the gain

ment box is The numer

n values also increas

>

h frequency2

automaticadisappearslected in the

in knob icon

he screen of

for the left s

igh frequen

eft of the aim

the left scre

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of the coses or decre

ally disappewhen the me header dis

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f which the

side (Low f

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med screen

een (Low f

uency 2/Hig

s.

in the appld the progre

orrespondineases.

ars after 5 menu key is splay.

CVS

00931011

(red) or

gain is inte

frequency 2

frequency 1

.

frequency 2

gh frequenc

licable operress bar incr

ng screen

seconds fropressed.

S-FX1

12-02

ended

2/Low

) until

2/Low

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ration rease

also

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CVS

0093

For g

1. At

2. CM

G

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to [F

To sw

S-FX1

101112-02

gain adjust

CM1, pres

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Gain item

ress [ENT] k

ress [CM1]

ynchronizedcreens inclu, from the g

n gain is sens will turn

(red) in1/F2] keys.

witch the ac

for left sc

tment of al

s [CM1] key

displayed. M

key

key

d gain, operauding zoom)ain of each

set in [Synns to

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ctive screen

creen, [GAIN

l screens a

y (L

Move the cu

.

to close C

ation of one) at the sam screen set

chronized], (red).

e screen wh

ns for VRM a

N-R/SEL]

at the same

Lights red [C

ursor to [Sy

CM menu (li

e gain knob me time, by it individually

[Gain kno

here VRM o

and [F1]/[F2

for rig

e time (syn

CM] key).

nchronized]

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ob icon]

operation is

2] keys, pre

ght screen.

Chapt

nchronized

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e the gain fodecreasing

(red)

valid and w

ess [GAIN-L

ter 2 Basic

d):

n item with

or maximumwith the sa

) at the low

when TVG

L/SEL]

c operation

2-51

.

m 4 screensme change

wer side of

is assigned

n

s e

f

d

Chapter 2

2-52

For gain a

1. If [GAINdisplaye

This [Sythe gain

2. If [GAIN

and if tu

The gaireferenc

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<Exam

C

L2: Low frequ

2 Basic op

adjustment

N-L/SEL] ed.

ynchronizedn individuall

N-L/SEL]

urned to the

n of all screce.

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mple of indic

Caution: Syseconds the menu

L1: uency2 Low

peration

t of all scre

or [GA

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or [GA

e left, the ga

eens can be

per screen

cation>

Changing

ynchronizedfrom the c

u key.

frequency1

eens at sam

AIN-R/SEL]

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AIN-R/SEL]

ain decrease

e changed

n plus the a

the synchr

d gain adjuompletion o

H2: High frequenc

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] is tu

amount of

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simultaneo

adjusted val

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ynchronize

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change in

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ox disappean. It also di

L2: Low frequency

d):

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L1: y2 Low frequ

CVS

00931011

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ain is indicat

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H2: uency1 High

S-FX1

12-02

box is

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ases,

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r 5 of

frequency2

CVS

0093

Type

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S-FX1

101112-02

es of gain c

re are two tthe gain of

gain of the c

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witch over

ress [SUBM

he SUBMEN

ress [ ] key

change:

ypes of gaiall screens

current mag

mages of ga

All screen

r change ty

MENU] key

NU is displa

y of

n change w including im

ges is chang

ain change

ns

ype of gain:

.

ayed. Move

.

Ga

when gain amages in thged.

types>

:

the cursor

ain 3 Gain5

adjustment he past is c

to [System]

Chapt

Gain 10

is done withanged and

Current im

] with [▲] or

ter 2 Basic

Gain 3 Gain5

th a gain knd the other

mages only

r [▼] keys o

c operation

2-53

5 Gain 10

nob. One isis that only

of .

n

3

s y

Chapter 2

2-54

4. [System

keys of

5. Press [

6. [Gain Ty

Image]

7. Press [Mset.

CautisoA

2 Basic op

m] of the SU

.

] key of

ype] of the S

with [▲] or

MENU] key

tion: Whens because tof previous tAfter scroll o

System

peration

UBMENU is

.

SUBMENU

[▼] keys o

, and

n the Gain Tthat the disptype are diffof one scree

G

m

G

s displayed.

is displayed

f .

d the SUBM

Type is switcplay methodferent. en, normal i

GainType Gain Type

. Move the

d. Move the

MENU disap

ched, the cod of images

mages will

cursor to [

e cursor to [

ppears and

olor of the ps for the sw

be on displ

Gain Type]

Retractive G

the selecte

ast images witched gain

ay.

CVS

00931011

with [▲] o

Gain] or [Cu

ed [Gain Ty

changes. Tn type and t

S-FX1

12-02

or [▼]

urrent

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This that

CVS

0093

2.2.6

The deep

This those

TVGreflecalong

In thdispl

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To sw

1. Pr

2. Th

3. Pr

S-FX1

101112-02

6 Adjustme

reflected sper.

means thae at deeper

is the functed signalsg the chang

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hod of TVG

imized] is the optimizedtrasonic.

nual] is the eference.

witch betw

ress [MENU

he menu is d

ress [ ] key

ent of TVG

ignals of ec

at the samer positions a

nction, accos attenuatege of depth.

depth wherhe same se

can be swit

he mode wit by diffusion

mode to ad

ween [Optim

U] key

displayed. M

y of

G

cho sounde

e fish schoare displaye

ording to thd according

re TVG funensitivity eve

tched over

th gain corrnal attenuat

djust the set

mized] and

.

Move the cu

.

er have les

ools at shaled weaker.

he characteg to their de

nction is effeen when the

between [O

rection depetion and abs

tting of [Stre

[Manual]:

ursor to [TV

s sensitivity

lower posit

eristics of epth and to

ective, fish eir depth is

Optimized] a

ending on thsorption att

ength], [De

VG] with [▲]

Chapt

y due to att

tions are di

ultrasonic so equalize t

schools of different.

and [Manua

he depth, baenuation de

pth] and [Ad

] or [▼] key

ter 2 Basic

ttenuation, a

isplayed st

sound, to the gain of

the same s

al].

ased on theepending on

Adjust] to fit

ys of

c operation

2-55

as depth is

ronger and

correct thethe images

size can be

e correctionn frequency

the images

.

n

5

s

d

e s

e

n y

s

Chapter 2

2-56

4. [TVG] o

of

5. Press [

6. [TVG Ty

with [▲

7. Press [M

2 Basic op

of the men

.

] of

ype] of the

] or [▼] key

MENU] key

peration

u is display

.

menu is dis

ys of

, an

yed. Move

splayed. Mo

.

d the menu

the cursor

ove the curs

u disappear

to [TVG T

sor and sel

s and the s

Type] with [

ect [Manua

elected TVG

CVS

00931011

[▲] or [▼]

al] or [Optim

G is set.

S-FX1

12-02

keys

mized]

CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-57

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].

<Example of optimized TVG images>

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.

Chapter 2

2-58

To adjust

1. Press [M

2. The men

3. Press [

4. [TVG] of

of

5. Press [

2 Basic op

TVG Adjus

MENU] key

nu is displa

] key of

f the menu

.

] key of

peration

st in main m

.

yed. Move

.

is displayed

.

menu:

the cursor t

d. Move the

to [TVG] wit

e cursor to

th [▲] or [▼

[TVG Adjus

▼] keys of

st HF1] with

CVS

00931011

.

h [▲] or [▼]

S-FX1

12-02

keys

CVS

0093

6. [T

de

7. Pr

8. To

To ad

1. At

Aske

2. Pr

3. Th

4. Se

W

rig

ico

Th[TV

S-FX1

101112-02

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2-59

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Chapter 2

2-60

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101112-02

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2-61

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Chapter 2

2-62

6. [TVG St

[▲] or [

With With

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101112-02

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2-63

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Chapter 2

2-64

7. In the c

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CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-65

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-FX1, 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.

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

Change in TVG correction by change in strength (Depth 140 m/Adjust 1 m)

0

20

40

60

80

100

120

140

0 10 20 30 40 50

TVG correction (-dB)

Depth (m)

15101520253035404550

Chapter 2 Basic operation CVS-FX1

2-66 0093101112-02

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.

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.

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

Change in TVG correction by change in depth(Strength 50/Adjust 1 m)

0 10 20 30 40 50 TVG correction (-dB)

140m120m100m80m60m40m20m

0

20

40

60

80

100

120

140

Depth (m)

Change in TVG correction by change in adjust(Strength 50/Depth140m)

0

20

40

60

80

100

120

140

0 10 20 30 40 50TVG correction (-dB)

Depth (m)

60m50m40m30m20m10m1m

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

CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-67

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.

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.

*1False 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.

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 speedbecomes slow in order.

Chapter 2 Basic operation CVS-FX1

2-68 0093101112-02

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.

CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-69

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.

<Example of display VRM on specific screen>

VRM 1 line VRM VRM 2 lines VRM

<Example of display of VRM whole screen (All screens same range)>

VRM one line VRM VRM 2 lines VRM

Chapter 2

2-70

<Example

2.4.1 Cha

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101112-02

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2-71

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n

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a

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Chapter 2

2-72

2.4.2 Ope

To switch

1. Press [M

2. The men

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keys of

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CVS

00931011

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101112-02

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2-73

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Chapter 2

2-74

2.4.3 Ope

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CVS

00931011

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101112-02

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2-75

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Chapter 2 Basic operation CVS-FX1

2-76 0093101112-02

2.5 Reduction of noise on images

Images of echo sounders display noise due to various causes.

The causes of noise are:

1. Interference caused by reception of signals transmitted by other echo sounders 2. Blur due to micro animate beings such as plankton 3. Noise caused by electric signal synchronized with transceiver

CVS-FX1 is equipped with functions to weaken the effect by each cause.

2.5.1 To reject interference

Interference is generated by the reception of signals transmitted by other echo sounders.

CVS-FX1 can eliminate interference by the following two methods:

1. To shift your own frequency from the frequency used by other echo sounders, to avoid reception of interference wave.

2. To reject interference by setting [IR (Interference Rejection) ] function.

<Example of IR (Interference Rejection) images>

Image with interference Image after rejection of interference

CVS

0093

To av

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2-78

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CVS

00931011

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101112-02

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2-79

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Chapter 2 Basic operation CVS-FX1

2-80 0093101112-02

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

To erase the weak response from dust and microbes such as plankton in seawater, there are following 4 methods: 1. Setting TVG 2. Shortening pulse length and narrowing frequency bandwidth 3. Setting [Color Erase] function 4. Setting [IR] (Interference rejection) function

When TVG is effective: In order to erase the response from dust and plankton at shallow depth of the displayed screen, setting TVG is effective. TVG can be set in two ways, [Optimized TVG] and [Manual TVG]. In the case of setting in [Optimized TVG], the images are clear with less interference noise down to water depth of approximately 100 m.

As for the setting of [Optimized TVG], see “To use of optimized TVG”, p 2 - 57. By setting [Manual TVG], noise reduction setting is possible to preference.

As for the setup of [Manual TVG], see “To adjust with manual TVG”, p 2 - 60.

When shortening pulse length and narrowing frequency bandwidth are effective: When the range used is less than 100 m and the response from dust and plankton on whole screen is to be erased, it would be effective to set the pulse length at [Short] and the frequency bandwidth at [Narrow]. By this setting, fine images such as dust and plankton are erased. It can be used for highlighting of images of aimed fish and erasing of response smaller than those.

As for the setup of [Pulse Length], see “2.1.5 Selection of pulse length”, p 2 - 19. As for the setup of [Frequency Bandwidth], see “2.1.6 Selection of frequency bandwidth”, p 2 - 22.

When [Color Erase] is effective:

When the response from dust and plankton displayed in light bluish color is to be erased, it is effective to use [Color Erase] function. The response of dust and plankton displayed in stronger color than green could not be erased. The color of aimed fish images and appearance of expanding response are displayed as it is and unnecessary response from dust and plankton is erased.

<Example of images with color erasing>

Color erase 0 % Color erase 50 %

CVS

0093

To se

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S-FX1

101112-02

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2-81

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Chapter 2

2-82

6. The men

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With

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CVS

00931011

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S-FX1

12-02

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CVS-FX1 Chapter 2 Basic operation

0093101112-02 2-83

When [Noise Reduction] is effective:

When the response from dust and plankton is to be diminished regardless of water depth and color, [Noise Reduction] is effective.

For [Noise Reduction] function, by narrowing the dynamic range and reducing tone graduation of colors, the color of weak response level becomes less visible.

<Example of Noise Reduction images>

Noise Reduction 0 Noise Reduction 5

Noise Reduction 10

Chapter 2

2-84

To set [No

1. Press [M

2. The men

3. Press [

4. The men

keys of

5. Press [

2 Basic op

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MENU] key

nu is displa

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the cursor t

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00931011

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101112-02

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CVS-FX1 Chapter 3 To make the best of [CM] keys

0093101112-02 3-1

Chapter 3 To make the best of [CM] keys

3.1 To use [CM] keys

[CM] (Condition Memory) key is used to memorize setting conditions of an echo sounder and recall them with one touch of a key button. For example, it is possible to switch the setting for seine fishing to the setting of squid fishing with one touch of a key button. CVS-FX1 is equipped with six [CM] keys, so can be used as if six units of echo sounders were used at a time.

[CM] key has three major functionality:

Switching screen mode Switching all settings with one touch of a button (setting values for each fishing

method can be memorized, recalled and switched with one touch of a button) Usually it is used for switching screen modes, and when the type of fishing is

changed, a particular setting can be switched to the other setting with one touch of a button, if specific values are memorized.

Please proceed to the corresponding pages for the functionality of your interest.

To use as a switching key of screen modes:

Types of screen (4-frequency, 2-frequency, Single-frequency, Zoom) are switched over frequently. Settings of menu, shift and gain, etc. are not decided.

Please proceed to “3.1.1 To use [CM] key for switching screen modes”, p 3-2.

To use as one touch switching key of all settings

Types of screen are rarely changed. Settings of menu, range, shift and gain, etc. have been determined by fishing methods, and all settings should be changed at once when fishing method is changed.

Please proceed to “3.1.2 To use [CM] keys as one touch switch to memorized setting to the fishing positions”, p 3-6.

Usually the key is used for switching screen modes, and when fishing method is changed, it is used as one touch switching key.

Types of screen (4-frequency, 2-frequency, Single-frequency, Zoom) are switched over frequently. Type of screen, menu setup, range, shift and gain, etc. have been determined by fishing methods, and all settings should be changed at once when fishing method is changed.

Please proceed to “3.1.3 Use [CM] keys as screen mode switch and one touch switch of setting”, p 3-10.

*1 A

Chapter 3

3-2

3.1.1 To u

CVS-FX1 conventionkeys of CM

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S-FX1

101112-02

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Chapter 3

3-4

5. Press [

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00931011

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S-FX1

12-02

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CVS

0093

6. Fofrequ

7. Se

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ZoomDisp

8. Pr

9. Fore

10. P

11. S

S-FX1

101112-02

or selectionuency 2, rep

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Chapter 3

3-6

3.1.2 To upos

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CVS

00931011

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CVS

0093

To se

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S-FX1

101112-02

et [CM] key

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3-7

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Chapter 3

3-8

5. Press [

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CVS

00931011

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S-FX1

12-02

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CVS

0093

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S-FX1

101112-02

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Chapter 3

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Chapter 3 To make the best of [CM] keys CVS-FX1

3-10 0093101112-02

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

This is to use [CM] key as screen mode switching normally, and to change to one touch switch of setting when fishing method changes.

Per each [CM] key for one touch switch of setting, 6 types (CM1 to CM6) of screen mode can be set up.

Therefore, total 36 types of screen modes, 6 types per CM1 to CM6, can be stored.

To store settings per fishing method in [CM] keys:

1. Change [CM] keys to [One touch switch of setting]. Refer to “To set [CM] key to [One touch switch of setting]”, p 3-7 for details.

Change [CM Key Usage] to [CM].

The [CM] key with the same CM number as in the header display lights red.

2. Settings are stored in [CM] keys. Refer to “To store in [CM] keys”, “To store in a new [CM] key” and “To store a new setting in another [CM] key based on a particular setting in a [CM] key”, p 3-8 for details.

To store screen mode in the setting of [CM] key per fishing method:

1. Press the [CM] key in which screen mode to store. To store in CM1, press [CM1] key . The header display turns to CM1.

2. Change [CM] key to [Screen mode switching]. Refer to “To set [CM] key to [Screen mode switching], p 3-3, [CM] key is changed to [Screen mode switching].

3. Store the screen mode in [CM1] to [CM6] keys, as described in “To set screen mode per CM key”, p 3-4, the screen mode is preset to [CM1] to [CM6] key. The CM number in the header display does not change. The [CM] key pressed lights red.

4. Store the screen mode in each CM key, by repeating procedures 1 and 2 above.

CVS-FX1 Chapter 3 To make the best of [CM] keys

0093101112-02 3-11

To use [CM] keys normally as [Screen mode switching]:

1. Press the [CM] key that is set as normal in use. In the case of CM1, press [CM1] .

2. Change [CM] key to [Screen mode switching] by referring to “To set [CM] key to [Screen mode switching]”, p 3-3.

3. Each time CM1, CM2, • • • CM6 is pressed, the screen mode switches.

To recall the setting when fishing method changes:

1. Change [CM] key to [One touch switch of setting] , by referring to “To set [CM] key to [One touch switch of setting]”, p 3-7.

Change [CM Key Usage] to [CM]. [CM] key with the same number as CM number in the header display lights.

2. Press the [CM] key that is set as normal in use. In the case of CM1, press [CM1] .

Each time CM1, CM2, • • • CM6 is pressed, the setting switches to the setting stored in the [CM] key pressed.

Caution: [CM* CM*] is displayed for a few seconds, during the time until setting is switched after [CM] key is pressed.

CVS

0093

4.1 T

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4.2

[F1]/toucharea

4.2.1

1. Pr

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4. Th

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4-1

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Chapter 4

4-2

4.2.2 Ass

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4.3

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4.3.1

To sw

1. Ke

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3. Pr

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101112-02

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to display s

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sea bottom

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anual].

l operation

4-3

sea bottom

ge key and

m always on

d.

n

3

m

d

n

Chapter 4

4-4

4.3.2 Sett

[Auto Rangon the disp

When sea with deepefrequent at

The sea bbottom is ncycle perio

To reduce range.

To switch

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3. Press [E

[Auto Ra

C

4 Useful op

ting of auto

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bottom faller range aftt shallower

bottom searnot found qod of transm

this deterio

depth rang

ressed [SHI

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ange] is disp

Caution: Duaddition, thrange and

peration

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unction to swen.

s outside oter a specifrange and

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oration of cy

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FT/M OFF]

nd select [A

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played in th

ring the opehe range opthe [Scr. Ind

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has a deepumber of traomes longe

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range:

key

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range auto

ay screen, itof transmisnt at deepe

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there is a fu

until [Rang

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omatically to