Koden CVS-126 Operation Manual

Declaration of Conformity

(As required by Article 7 (1) of Directive 89/336/EEC)

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 [phone] Telefax [phone]

Identified by the type number CVS-126 to which this declaration refers conforms to the

requirements of Directive 89/336/EEC amended by 92/31/EEC and 93/68/EEC and is in

conformity with the EMC, Health and Safety standards of

EN60945: 2002

Signed
Heinz Hoghoff,

Dated 10 Jun. 2008
Koden Elektronik GmbH.

Am Gewerbepark 15
D-64823, Gross–Umstadt
Germany.
Phone [phone]
Telefax+49 6078 73824

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

CVS-126

0093132702-02 i

CVS-126 Instruction Manual

Doc No. 0093132702

Document Revision History

No. Doc. No / Rev. No. Date Revised

Revised Content

0 0093132702-00 09/04/2008

First edition

1 0093132702-01 25/05/2008

Chapter all

2 0093132702-02 18/07/2008

ⅶ,ⅹ,ⅺ,1-2,1-3,1-9,1-11,2-3,2-4,2-5,2-13,3-2,5-5,5-10,6-1

3

4

5

6

7

8

9

10

Revision criteria for document number/version number

If any contents of the document has been revised, the version number is altered on the cover

sheet and corresponding chapter revised, while the other chapters remain unchanged. The

document number is designated lower right on the cover sheet and at the left or right part of every

footer.

Prohibition of copy/reprint

No part of this manual shall be reprinted or copied by any means without written permission by

Koden Electronics Co., Ltd.

Disclaimer

The specifications and technical issues described in this manual are subject to change without

notice. Koden Electronics Co., Ltd. has no responsibility for any human and physical damage or

failure caused by the interpretive error of this manual.

Important Notice CVS-126

ii 0093132702-02

Important Notice

• The re-use and transcription of Instruction Manual (hereafter called this manual) needs permission
of our company. Our company prohibits the un-authorized re-use and transcription.

• If this manual is lost or damaged, consult our dealer or our company.

• The specification of our products and the content in the Instruction Manual are subject to changed

without notice.

• In the explanation of this manual, the content displayed on the menu of product may be different.
The keys and menus in the illustration may differ in physical font and shape. And some parts may
be omitted.

• Our company is not liable for damage and trouble arisen from misunderstanding the content
described in this manual.

• Our company is not liable for earthquake, lightning, fire for which our company is not responsible,
action by third party, other accident, customer’s unintended error/abuse and damage caused by the
use under other abnormal condition.

• Our company is not liable for damage of accompaniment (change/loss of memorized content, loss
of business profit, stop of business) arisen from use or failure of our product.

• If the stored data is changed or lost, irrespective of any cause of trouble and damage, our company
is not liable for it.

• Our company is not liable for any damage arisen from malfunction caused by combination of
software and connected equipment we do not involve.

CVS-126 For Your Safe Operation

0093132702-02 iii

For Your Safe Operation

Pictorial used in this Instruction Manual

This Instruction Manual uses the following pictorials. Understand the meaning of each pictorial and

implement the maintenance and inspection.

Symbol Meaning

Mark for warning

This symbol denotes that there is a risk of death or serious injury when not
dealing with it correctly.

Mark for danger high voltage

This symbol denotes that there is a risk of death or serious injury caused by
electric shock when not dealing with it correctly.

Mark for caution

This symbol denotes that there is a risk of slight injury or damage of device
when not dealing with it correctly.

Mark for prohibition

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

Caution Item on Handling

Do not disassemble or modify. It may leads to trouble, fire, smoking or
electric shock. In case of trouble, contact our dealer or our company.

In case of smoke or fire, boat power off and the power of this unit. It may
cause fire, electric shock or damage.

Be cautious of remaining high voltage.
A high voltage may remain in the capacitor for several minutes after you
have powered off. Before inspecting inside, wait at least 5 minutes after
powering off or discharge the remaining electricity in an appropriate manner.
Then, start the work.

The information displayed in this unit is not provided directly for your
navigation. For your navigation, be sure to see the specified material.

For Your Safe Operation CVS-126

iv 0093132702-02

Use the specified fuse. If un-specified fuse is used, it may cause a fire,
smoke or damage.

Whenever transmitting, be sure to submerge the transducer in water first. If
transmitted without submerging the transducer, it may be damaged.

Caution Item on Equipment

Be careful of a high voltage inside.

A high voltage, which may risk your life, is used. This high voltage remains
in the circuit after you have powered off switch. To prevent touching the high
voltage circuit inadvertently, the hard cover is provided to the high voltage
circuit and the high voltage caution label is affixed. Ensure to power off
switch for your safety and discharge the electricity remaining in the capacity
before starting to check. An engineer authorized by our company should
inspect and maintain

Be sure to power off in the boat.

If the power switch is inadvertently powered on during work, you will be
electrified. To prevent such accident from occurring, ensure to power off in
the boat and the power of equipment. Furthermore, it is safer to hang the
caution tag described as [Under Work] near the power switch of equipment.

Be careful of dust

Inhaling dust may cause A respiratory disease. When cleaning the inside of
equipment, be careful not to inhale dust. Wearing a safety mask is
recommended.

Caution on location of equipment

Do not install the equipment where it is excessively damp and suffers from
excessive water drops.

Escaping from static electricity

The static electricity may be generated from the carpet on the floor in the
cabin or clothes made of synthetic fiber. The static electricity may destroy
the electronic parts on the circuit board. Handle the circuit board, taking the
measure of static electricity free.

Install the transducer at the location where it is not affected by bubble and
noise The bubble and noise seriously degrade the performance of this unit.

CVS-126 Contents

0093132702-02 v

Contents

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

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

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

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

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

System Configuration............................... ⅷ

Configuration of Equipment...................... ⅹ

Chapter 1 Basic Operation......................1-1

1.1 How to use the key .................... 1-1

How to remove the hard cover... 1-2

When removing the CVS-126

Display unit ................................ 1-2

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

Power on.................................... 1-3

Power off.................................... 1-3

Alarm of Power Voltage ............. 1-3

1.3 LCD Brilliance Adjustment ......... 1-4

Adjustment of LCD Brilliance ..... 1-4

Brightness Adjustment of Panel

Brilliance .................................... 1-4

1.4 Switch-over of Menu .................. 1-4

Normal Image (Low frequency,

High frequency).......................... 1-4

Dual frequency........................... 1-5

Zoom (Low frequency, High

frequency) .................................. 1-5

Navigation Menu

(NAV1, NAV2) ............................ 1-7

1.5 Switch-over of Range................. 1-8

Set the range switching to auto

range. ......................................... 1-8

1.6 Gain Adjustment......................... 1-8

Basic Operation of Gain............. 1-8

Selection of Echo sounder mode

and Depth mode ........................ 1-8

Fine-adjusting the Auto Gain ..... 1-9

Adjust the gain manually............ 1-9

Easy Gain Adjustment................ 1-9

Confirm the gain state.............. 1-10

1.7 Use of 【EVENT】 key.......... 1-10

Select the event. ...................... 1-10

Preset the destination. ............. 1-10

Store the image........................ 1-11

Start the homing....................... 1-11

1.8 Use of 【FUNC】 key ............ 1-12

How to use the 【FUNC】 key1-12

Preset of 【FUNC】 key ........ 1-12

1.9 Operation of VRM .................... 1-13

Chapter 2 How to use the Menu .............2-1

2.1 How to operate the menu .......... 2-1

Display the menu. / Stop the

display of menu.......................... 2-1

Menu Operation ......................... 2-1

2.2 Change of Image Speed ............ 2-2

2.3 Rejection of Interference............ 2-2

Interference Rejection................ 2-2

2.4 Color Rejection of Weak Echo ... 2-2

Color Rejection .......................... 2-2

2.5 Rejection of Noise ...................... 2-3

Noise Rejection.......................... 2-3

2.6 Setting of Shift............................ 2-3

Setting of Fixed Shift.................. 2-3

Setting of Auto Shift ................... 2-3

2.7 Setting of Zoom Range .............. 2-3

2.8 Setting of Zoom Start ................. 2-4

2.9 Setting of Background Color...... 2-4

2.10 Setting of White Line.................. 2-4

2.11 Preset of Range ......................... 2-5

2.12 Setting of Alarm.......................... 2-5

Stopping the alarm sound .......... 2-5

Setting the alarm........................ 2-6

Contents CVS-126

vi 0093132702-02

Release the alarm. .....................2-6

Confirm the alarm state. ............. 2-6

2.13 Preset/ WPT edit/ WPT delete of

Destination.................................2-6

NAV Start....................................2-6

Cancel the NAV. .........................2-7

Edit the destination.....................2-7

Delete the destination. ...............2-8

Recall the image stored and

preset it as a destination. ...........2-8

2.14 Store/Recall/Deletion of Image... 2-9

Store the image. ......................... 2-9

Recall the stored image. ............2-9

Delete the stored image. ............2-9

Add the comment to the stored

image........................................2-10

2.15 Selection of Zoom ....................2-10

2.16 Selection of NAV Display ......... 2-11

Type of NAV Display................. 2-11

Dividing Method of Display....... 2-11

Selection of NAV Menu ............ 2-11

2.17 Explanation of Sonar................ 2-12

Switch-over of Sonar Tone.......2-12

Connection of External

Speaker .................................... 2-12

2.18 Explanation of Menu Item ........2-12

TVG ..........................................2-12

Change the TX power. .............2-12

Display the A scope. / Stop the

display of A scope. ...................2-13

Change the display color of echo

sounder image..........................2-13

Change the depth value. ..........2-13

Display the water temp graph. /

Stop the display of water temp

graph. .......................................2-13

Disp Width ................................ 2-13

Image Swap .............................2-14

Chapter 3 How to use the system menu .3-1

3.1 Display of System Menu ............ 3-1

3.2 Setting of External In/Out ...........3-1

3.3 Setting of Correct Item ...............3-2

3.4 Setting of System Item ...............3-3

3.5 Setting of Basic Set Item ............ 3-4

3.6 Maintenance Menu.....................3-4

Chapter 4 Maintenance and Inspection...4-1

4.1 Inspection ................................... 4-1

4.2 Cleaning .....................................4-1

4.3 Fuse Replacement .....................4-1

4.4 If you suspect a trouble ..............4-2

4.5 Diagnostic Test ........................... 4-3

Chapter 5 Installation..............................5-1

5.1 Item of Caution on Installation.... 5-1

5.2 Installation of CVS-126 Display

unit ..................................................5-2

5.3 Installation of Transducer ........... 5-5

5.4 Wiring .........................................5-7

5.5 Serial Data................................ 5-11

Chapter 6 Table Attached........................ 6-1

6.1 Menu List....................................6-1

6.2 Specification ............................... 6-3

6.3 Appearance ................................ 6-4

CVS-126 Introduction

0093132702-02 vii

Introduction

The CVS-126 is a Dual frequency (50kHz/200kHz) Color LCD display echo sounder.

This unit equipped with digital process displays the circumstance in the water under all conditions,
matching with the high luminance 5.7 inch LCD.

The main features of this unit are as follows.

• With the digital reception process, the compatibility of the high resolution in a shallow depth and the
noise rejection capability in a deep depth are established. The auto mode function provides the best
image.

• The unit can be installed in an open bridge and is highly waterproof.

• Up to 10 images can be stored. If you connect the optional GPS, the homing function, that directs

your board to navigate easily to the location desired, is available by marking the event mark when
recalling the stored image.

• The unit is designed to save power consumption. The white LED is adopted for illuminating the LCD
and the power consumption is minimal in this class. The unit emits less heat and the occurrence of
condensation is rare.

• The various alarm functions are available. (Bottom, school of fish, water temperature*, board
speed*, arrival*, XTE*, power) (Note: The mark * denotes that the connection of option is
mandatory)

• When flush-mounting, the unit can be easily installed from front side.

System Configuration CVS-126

viii 0093132702-02

System Configuration

Connection Diagram

GPS sensor

TD: transducer

* (Inner-hull, through-hull)

* TD-500T-2B (Inner-hull)
* TD-500T-3B (through-hull)
(Dual frequency combination
type 50/200kHz)

GPS-20A

External Navigation Equipment

External water temperature meter

External speaker

(For speaker with amplifier)

Water temperature sensor

/ speed sensor

ST-80/90/100

Requirement: Option cable (CW-840-0.3M)
Note: To use the water temperature sensor / speed
sensor, the wiring of transducer connector has
to be changed.

DC10.8 31.2V

: Standard

: Option

CVS-126 Display unit

(Prepared by a user)

CVS-126 System Configuration

0093132702-02 ix

-

CW264-2M

CVS-126 echo sounder unit
With mounting bracket and hard

cover

External power output (For GPS etc)

External speaker (For speaker with amplifier)

NMEA circuit input output
GPS sensor (GPS-20A)
External navigation equipment,

external water temperature meter

DC10.8~31.2V

Option cable (CW-840-0.3M)

Connection to the Transducer

Connection to the water temperature sensor

Connection to the speed sensor

Transducer TD-500T-3B (Dual frequency combination type 50/200kHz)
Bronze made Equipped with through-hull

Transducer TD-500T-2B (Dual frequency combination type 50/200kHz)
Plastic made Equipped with inner-

hull

Note: To use the water temperature sensor / speed sensor,
the wiring of transducer connector has to be changed.

Water temperature

sensor

/ speed sensor

ST/80/90/100

To

Transducer

To POWER connector

Red

Black

Legend

Standard configuration
Option

(Prepared by a user)

+

connector

Configuration of Equipment CVS-126

x 0093132702-02

Configuration of Equipment

Standard Equipment Configuration List

No

Name of item Type Remark Weight/

Length

Quantity

1 Transmission-receiver

display unit

CVS-126 600W output

with mounting bracket
and knob

1.3 kg

1

2 Hard cover

C38MB12020 150g 1

3 DC power cable

(Complex cable)

CW-264-2M With 12 connector at

one end/ un-treated at
the other end

2m 1

4 Fuse

F-7161-2A
Cylinder (ø6.3x32)

Normal fusion type for
main power

2

5 Trans Tapping Screw TPT5 x 20U For fixing CVS-126

Display unit

4

6 Cap

LTWCAP-DABCFXC1 For transducer cable

connector

1

7 Instruction Manual CVS-126.OM.E English 1

8 Quick Reference CVS-126.QR.E English 1

CVS-126 Configuration of Equipment

0093132702-02 xi

Essential Option

No

Name of item Type Remark Weight/

Length

Quantity

1 Transducer Type of transducer transducer cable (with

connector at one end)

9m 1

Type of transducer

No

Specification Frequency Material Mounting method

1 TD-500T-2B

50/200kHz Plastic Inner-hull

(The inner-hull kit is
needed.)

2 TD-500T-3B

50/200kHz Bronze Through-hull

Option List

No

Name of Item Specification Remark Weight/Length

ST-80 For transom mounting

Plastic made (with cable)

0.3kg/
8m

ST-90 For through-hull mounting

Plastic made (with cable)

0.6kg/
8ｍ

1 Water temperature

sensor / speed
sensor

ST-100 For through-hull mounting

Bronze made (with cable)

1.2kg/
8ｍ

2 GPS sensor GPS-20A-10M-3 For GPS measuring

(With power & signal cable)

250g/10m

3 Inner-hull kit MFB-04 Plastic made for installing the

transducer TD-500T-2

1.3kg

4 Cable for transducer CW-840-0.3M Needed when using the

optional water temperature
sensor / speed sensor.

30cm

5 Connector for GPS

sensor

LTWBD-06PMMP-LC Needed when using the

GPS-20A（Type B）sensor.

Chapter 1 Basic Operation CVS-126

1-1 0093132702-02

Chapter 1 Basic Operation

1.1

1.11.1

1.1 How to use the key

CVS-126 Display unit

In addition, for your convenience when operating keys other than keys in the menu by the【MENU】 key,
the menu displayed automatically closes.

No. Key Name Explanation

1 【DISP】

It switches to the High frequency or Low frequency of echo sounder
image, zoom and navigation menu.

2 【EVENT】

It notifies the external equipment of the present position. It presets the
menu. It begins a homing.

3 【Cursor】

It selects the menu item.
It changes the set value.
It moves the VRM marker.
It moves the marker for notifying the event.

4 【FUNC】 It recalls directly the item preset.
5 【MENU】 It opens or closes the menu.
6 【 RANGE 】 It changes the range setting.

7 【Knob】

Press: It recalls the gain adjustment.
Rotate: It changes the gain value.
It selects the item in the menu.

8 【BRILL 】/ Power

Press: Power on. It adjusts the brilliance and brightness of panel.
Long-press: Power off.

1
2

3

5
4

6

7

8

CVS-126 Chapter 1 Basic Operation

0093132702-02 1-2

How to remove the hard cover

While widening the claws at right and left sides of hard cover, draw the hard cover towards you.

Claw

When removing CVS-126 Display unit:

To prevent dust from entering, cap the connector at the rear of CVS-126 Display unit and the power
cable with caps.

Install the supplied cap to the transducer cable as shown in the figure and cap it.

Caution: Do not pull the cable strongly. If you do so, it will be broken.

The clean of CVS-126 Display :

The cleaning of the display goes after removing the front-frame. After removing the front-frame, use a
synthetic detergent and OA cleaner and wipe the display lightly. Then dry sufficiently, and return the
front- frame to original position.

Caution: The display has a special coating. Do not use a solvent such as paint thinner,

acetone, alcohol, and benzene, etc.

Caution: Strong rubbing may cause bruising, scratching.

Chapter 1 Basic Operation CVS-126

1-3 0093132702-02

1.2

1.21.2

1.2 Power On/Off

Power on

1

Press the 【BRILL 】 key to power on.
The startup menu is displayed. When
started up, the memories (ROM, RAM) are
automatically checked. When checking is
normally finished, the menu below is
displayed.

Caution: If an error occurs in the memory

check, the LED on the operation
panel blinks. The unit may not
function normally. If you suspect
trouble, contact the dealer of your
purchase or our company.

2

Language Selection at Initial Startup.

When powering on first, after the [Initialize] is
processed, the [Language] menu is displayed.

Select the language with 【】 key or 【】 key.
(The language can be selected by rotating the

【knob】.)

Press the 【MENU】 key to decide the language.

3

After a few seconds pass, the menu
selected in 【DISP】 is displayed.

Type of Gain
H: High frequency gain,

L: Low frequency gain

Type of Range
R: M: Manual Range, R: A: Auto Range,
R: AS: Auto Shift

Power off

1

When powering off, keep pressing the

【BRILL 】 key for 3 seconds.

The remaining time for the power to shut off
is displayed on the menu.

Alarm of Power Voltage

If detecting the malfunction of the voltage, the

icon blinks and the alarm beeps.

Caution: In case of the low voltage or the

high voltage, it shuts down. The
precision of Power Voltage is ±±±±

0.5 V.

Gain

Depth

School of fish

Oscillation line

Dual freq image

Range

Function icon

Time mark

Rainbow pattern

Fish

L H

Language

English

日本語

CVS-126 Chapter 1 Basic Operation

0093132702-02 1-4

1.3

1.31.3

1.3 LCD Brilliance

Adjustment

Adjustment of LCD Brilliance

The [Lcd brill] and [Panel brill] can be switched
every time when pressing the 【BRILL 】key.

1

Press the 【BRILL 】 key for a short period
of time to display the menu ([Lcd brill]).

2

Rotate the 【Knob】.
When “1” is selected, it is darkest. When
“10” is selected, it is brightest.

Lcd brill

10

3

Press the 【MENU】 key to close the menu.

Brightness Adjustment of Panel
Brilliance

The brightness of panel can be adjusted,

1

Press the 【BRILL 】 key for a short period
of time to display the menu ([Panel brill]).

2

Rotate the 【Knob】.
When “1” is selected, it is darkest. When
“10” is selected, it is brightest.

Panel brill

10

3

Press the 【MENU】 key to close the menu.

1.4

1.41.4

1.4 Switch-over of Menu

7 kinds of displays are provided in all. Select the
display suitable for your purpose.

1

Press the 【DISP】 key.

2

Select the display you desire to display.

Disp

NAV1/ Normal (H)

Normal (H)

Zoom (H)
Dual Freq
Zoom (L)
Normal (L)
NAV2/ Normal (L)

(High): High frequency

(Low): Low frequency

NAV1: Navigation display1

NAV2: Navigation display2

3

Press the 【MENU】 key to close the menu.

Normal Image (Low frequency, High
frequency)

Low frequency(50kHz)

Since the beam width is wide, the search range
becomes wide so that the beam can search the
deep depth.

High frequency(200kHz)

Since the beam width is narrow, it is hard to be
interfered by noise and bubble in the sea so that
the school of fish can be searched in a high
resolution.

(50 kHz)

(200 kHz)

Low frequency

High frequency

School of fish

Point B

Point A

Ultra-sonic

signal

Your boat

Sea level

Chapter 1 Basic Operation CVS-126

1-5 0093132702-02

Dual frequency

The High frequency image can be displayed in
the right half side and the Low frequency image
can be displayed in the left half side. Since the
beam width differs depending on frequency, the
school of fish and sea bottom look different.

Zoom (Low frequency, High frequency)

A part of normal image can be zoomed. (1) [Bottom], (2) [Bottom Discrimination], [zoom], (4) [Bottom
Zoom] and (5) [Bottom Follow Zoom] are provided for zoom.

The unit is set to (1) [Bottom] at ex-factory. To change to other zoom display, set it in the menu. (See
[2.7 Setting of Zoom Range].)

Zoom type

Zoom start position

Zoomed range

Purpose

Bottom It displays the position of

the bottom in the fixation
in the display bottom part.

It displays the bottom and
upper in the zoom.

It is convenient to see a
school of fish near the
bottom.

Bottom
Discrimination

It displays the position of
the bottom in the fixation
in the position of 1/4
under the display.

It displays the bottom and
upper in the zoom, it
displays under the bottom in
the ordinary.
(Under the bottom, it doesn't
display in the zoom).

It is convenient to see a
school of fish and a bottom
quality near the bottom.

Zoom It displays a zoom start

position in the fixation at
the top of the display.

It displays in the zoom from
the zoom start position to the
range you set.

It is convenient to see the
specified range in the
zoom.

Bottom Zoom It displays the position of

the bottom in the position
which is the same as the
ordinary display.

It displays upper side of the
bottom in the zoom except
the bottom.

It is convenient to see a
school of fish near the
bottom and the form of the
bottom.

Bottom Follow
Zoom

It always displays the
position of the bottom in
the lower part of the
display.

It displays the bottom and
upper and lower sides in the
zoom.

It is convenient to see a
school of fish near the
bottom and the form of the
bottom.

Low frequency image

High frequency image

CVS-126 Chapter 1 Basic Operation

0093132702-02 1-6

(1) Bottom

(2) Bottom Discrimination

(3) Zoom

Zoom start position

Zoomed range

The display width of zoom
is displayed in orange.

Normal image

Zoom image

30.0

Zoomed range

Zoomed range

30.0

The display width of zoom
is displayed in orange.

Normal image

Zoom image

The display width of zoom
is displayed in orange.

Normal image

Zoom image

30.0

Chapter 1 Basic Operation CVS-126

1-7 0093132702-02

(4) Bottom Zoom

(5) Bottom Follow Zoom

Navigation Menu (NAV1, NAV2)

The navigation menu can be displayed at the left side on the display. To display the information other
than depth, sensors need to be connected. (See [2.16 Selection of NAV Display].)

30.0

The display width of zoom
is displayed in orange.

Normal image

Zoom image

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

R:M 12.6VH:9.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

高

R:M 12.6VH:9.0

Depth

Water temp

Range

Total range

Zoomed range

Zoomed range

The image below the bottom
is not zoomed.

30.0

The display width of zoom
is displayed in orange.

Normal image

Zoom image

CVS-126 Chapter 1 Basic Operation

0093132702-02 1-8

1.5

1.51.5

1.5 Switch-over of Range

The range of measured depth displayed on the
display can be changed.

To meet your purpose, select the range of
measured depth.

Set the range switching to auto range.

By following automatically the bottom, the image
of echo sounder in the suitable range of
measured depth can be displayed.

This mode is convenient to display always the
range from sea level to bottom.

The range value
changes

1

Press the [MENU] key to display the menu.

2

Select [Display Range] → [Range Mode].

3

Select the [Auto Range].

Range Mode

Manual

Auto Range

Auto Shift

(See [2.6 Setting of Shift].)

4

Press the [MENU] to close the menu.
When the [Auto Range] is set, the [R : A] is
displayed a the upper side of menu.

Set the range switching to Manual
range.

1

Press the 【】 key of 【 range】 key or

【】 key.

2

Select the range you desire to set.

3

Press the 【MENU】 key to close the menu.
When the [Manual] is set, the [R : M] is
displayed at the upper side of menu.

Caution: By selecting the [D.range] →→→→

[Range preset], the range can be
preset.

1.6

1.61.6

1.6 Gain Adjustment

The gain can be adjusted in the auto mode (Echo
sounder mode, Depth mode) or manual mode.

[Cruising mode]

Eliminating the weak echo, it displays clearly the
sea bottom of strong echo.
It is suitable for cruising to the fishery ground.

[Fishing mode]

It displays clearly the weak echo reflected from
the school of fish.
It is suitable for searching the school of fish.

Basic Operation of Gain

Every time when rotating the 【Knob】, the [Gain]
and [Auto Gain Select] are switched.

By rotating the 【Knob】, the gain adjustment or
auto gain can be selected.

Selection of Echo sounder mode and
Depth mode

The gain adjustment can be set to [Auto Adjust].

1

Press repeatedly the 【Knob】 until the [Auto
Gain Select] menu is displayed.

2

Select the [Depth mode] or [Echo sounder
mode] by rotating the 【Knob】.

Range

5.0

10.0

50.0

80.0

100.0

150.0
300
500

Chapter 1 Basic Operation CVS-126

1-9 0093132702-02

3

Press the 【MENU】 key to close the menu.
When the [Cruising mode] is set, the [A : AC]
is displayed at the upper side of menu.
When the [Fishing mode] is set, the [A : AF]
is displayed at the upper side of menu.

Fine-adjusting the Auto Gain

When the [Cruising mode] or [Fishing mode] is
set, the gain can be fine-adjusted.

1

Press repeatedly the 【Knob】 until the [Auto
Gain Select] menu is displayed.

2

Select the [Cruising mode] or [Fishing mode]
by rotating the 【Knob】.

3

Press the 【Knob】 to display the Auto Gain
Adjustment].

4

Fine-adjust the gain by rotating the 【Knob】.
The 【 range】 key menu position can be
moved.

5

Every time when pressing the [Auto Gain
Select] and [Auto adjust high] or [Auto adjust
low] are alternately displayed.

6

Press the 【MENU】 key to close the menu.

7

When pressing the 【Knob】 again, the
previous menu before pressing the

【MENU】 key is displayed.

Adjust the gain manually.

When the image of High frequency only is
displayed on the display, the High frequency gain
can be adjusted.

When the image of Low frequency only is
displayed on the display, the Low frequency gain
can be adjusted.

When both of the High frequency image and Low
frequency image are displayed, by pressing the
[Knob], the adjustable frequency can be
changed.

Caution: If you increase the gain too much,

noise will appear on the entire
image, resulting in an unclear
image. Adjust properly the gain so
that the optimum image can be
always displayed.

Over-gain

Under-gainOptimum

1

Press the 【Knob】.

2

Select the [Manual] by rotating the 【Knob】.

3

Press the 【Knob】.

4

Adjust the gain by rotating the 【Knob】.
The 【 range】 key menu position can be
moved.

Gain (H)

0

Stop increasing the gain just before noise
appears on the image.

5

When the [Disp] is set to other than [Dual
freq],

every time when pressing the [Knob], the
[Gain (H)] or [Gain (L)] → [Gain select] is
displayed.
When the [Disp] is set to the [Dual freq],
every time when pressing the [Knob], the
[Gain (H)] -> [Gain (L)] → [Gain select] is
displayed.

6

Press the 【MENU】 to close the menu.

7

When pressing the 【Knob】 again, the
previous menu before pressing the

【MENU】 key is displayed.

Easy Gain Adjustment

Depending on the item of [Auto Gain Select], the
adjustment menu differs.

1

Rotate the 【Knob】.

2

The gain adjustment menu is displayed and
the gain can be adjusted.

3

Press the 【MENU】 to close the menu.

Gain select

Manual

Cruising

Fishing

Auto adjust high

0

CVS-126 Chapter 1 Basic Operation

0093132702-02 1-10

Confirm the gain state.

The present set value of frequency (High
frequency or Low frequency) adjusted last is
displayed at the upper left side of menu.

Example)
The High frequency gain is 8.0 → H: 8.0.

1.7

1.71.7

1.7 Use of 【EVENT】 key

By pressing the 【EVENT】 key, three functions
of [Store Position]. [Store Image] and [Homing]
are available.

The homing is the function to instruct your boat
to navigate easily to a point where you desire to
go back.

[Save pos]: The latitude and longitude of a point
can be stored.

[Store image]: An image of the fish finder can be
stored in the internal memory.

[Homing]: The WPT navigation starts, using the
latitude and longitude of a point which is set as a
destination by pressing the 【EVENT】 key.
Simultaneously, the latitude and longitude of the
point can be stored in the destination list.

Select the event.

Select the functions when pressing the

【EVENT】 key.

1

Press the 【MENU】 key.

2

Select [NAV] → [EVENT Key set].

3

Change the setting of [EVENT key set].

(Refer to [2.6 Setting of Shift ].)

4

Press the 【MENU】 to close the menu.

Preset the destination.

When you find the school of fish or tide, its
location can be preset as a destination.
(10 locations at maximum)

When presetting the destination, switch [NAV] →
[EVENT Key set] → [Store pos].

1

In the state that no other key is pressed,
press the 【】 key or 【 】key.

2

Move the cursor (Redline) with the 【】 key
or 【】 key to the location to be preset as
a destination.

3

Press the 【EVENT】 key.
When decided, the red line is drawn at the
designated location on the echo sounder
menu and the latitude and longitude of
designated location are registered in the
destination list.
At this moment, the list number of preset
destination is displayed.

EVENT Key set

Store pos

Store image

Homing

R:M

12.6V

H:8.0

Cursor (Redline)

L

H

Chapter 1 Basic Operation CVS-126

1-11 0093132702-02

4

After a certain time passes, the message
disappears and presetting the destination is
finished.

Caution: When pressing the 【【【【EVENT】】】】 key,

if [In out] →→→→ [NMEA output data] →→→→
[TLL] is set to ON, the latitude and
longitude of location
above-designated is output to the
navigation system connected.

Caution: If the destination list is full, the

preset destination list is not
deleted, showing the message
that the list is fully filled.
After a certain time passes, the
message disappears.

Store the image.

When you find the school of fish or tide, its
location can be stored as a destination.
(10 locations at maximum)

When storing the image, switch [NAV] →
[EVENT Key set] → {Store pos}.

1

Press the 【EVENT】 key.
The image of echo sounder presently
displayed is stored and the list number of
stored image is displayed.

2

After a certain time passes, the message
disappears and storing the image is finished.

Caution: If the destination list is fully filled,

the preset destination list is not
deleted, showing the message
that the image is fully filled. After
a certain time passes, the
message disappears.

Start the homing

When you find a school of fish or a tidal flow,
your boat can go back easily to that point.

Your boat can go back to any point on an image
you saved. (See [2.13 WPT navigation].)

To perform the homing, it is necessary to select
[Navigation] → EVENT key set → [Homing].

1

In the state that no other key is pressed,
press the 【 】 key or the 【 】 key.

2

Move the cursor (red line) to a point you
desire to go back with the【 】 key or 【 】
key.

L

H

L

H

Waypoint list # 1 is registered

A Wpt list is full.
Registration is not cpmpleted

A list of Pic is full.

Registration is not cpmpleted.

Image data list # 1 is registered

Cursor
(Redline)

CVS-126 Chapter 1 Basic Operation

0093132702-02 1-12

3

Press the 【EVENT】 key.
When you decide, the red line is drawn on
the image of the fish finder at the point you
designate and the latitude and longitude of
the point you designate is stored in the
destination list.
At this moment, the number of the stored
destination list is displayed.

4

The navigation display (NAV1) is displayed
and the WPT navigation starts.

Note: The display of NAV1/Normal (H) is

displayed.

1.8

1.81.8

1.8 Use of 【FUNC】 key

When factory-shipped, the [Image Speed] is
assigned to the 【FUNC】 key. The function
settable to the 【FUNC】 key can be selected
among [Image Speed], [Interference Rejection],
[Color Rejection], [Noise Rejection], [Range
Mode], [Shift], [Zoom Range], [Zoom Start],
[Background] and [White Line]. Set the function
frequently used for your convenience.

How to use the 【【【【FUNC】】】】 key

1

Press the 【FUNC】 key.

2

Change the setting by rotating the 【Knob】.

In case of [Image speed]

Image Speed

2/1

1/1

stop
1/1.5
1/2
1/2.5
1/3
1/3.5
1/4
1/4.5

3

Press the 【MENU】 key to close the menu.

Preset of 【【【【FUNC】】】】 key

1

Press the 【MENU】 key.

2

Select [System] → [FUNC key set].

3

Select the function.

12.6V

37.0m

FUNC key set

Image Speed

IR
Color Rejection
Noise Rejection
Range Mode
Shift
Zoom Range
Zoom Start

Background Color

White L

Cursor (Redline)

L

H

Chapter 1 Basic Operation CVS-126

1-13 0093132702-02

4

Press the 【MENU】 key to close the menu.
The icons of functions preset are displayed
at the upper right side on the menu.

Image Speed
IR
Color Rejection
Noise Rejection
Range Mode
Shift
Zoom Range
Zoom Start
Background Color
White Line L

1.9

1.91.9

1.9 Operation of VRM

The VRM (movable marker) shown by the green
line can be moved up and down.

It is convenient to measure the depth by aligning
with the target such as school of fish.

1

Press the 【】 key or 【】 key. The
movable marker (straight line) is displayed.

2

Press the 【】 key or 【】 key. The
movable marker moves up and down.
The movable marker and the numerical of
marker depth are simultaneously
highlighted.

When displaying dual images, if the 【】
key or 【】 key is pressed, the movable
marker moves to the neighboring image.

Caution: When several seconds pass after

finishing the VRM operation, the
numerical of marker depth
becomes normal display.

Movable marker

Marker Depth

CVS-126 Chapter 2 How to use the Menu

0093132702-02 2-1

Chapter 2 How to use the Menu

2.1

2.12.1

2.1 How to operate the

menu

Display the menu. / Stop the display

of menu.

1

Press the 【MENU】 key.
The menu and explanation of operation are
displayed.

2

Press the 【MENU】 key.
The menu and explanation of operation
close.

Menu Operation

1

When the menu is displayed, press the

【】 key or 【】 key to select the menu

name. Depending on the selected menu
name, the content in the set item column at
the right side changes.
(The menu name can be selected by
rotating the 【Knob】.)

Range mode

Shift

Zoom select

Zoom range

Zoom start

Range preset

Return

Manual

0m

10.0m

0m

Bottom

Adjust

Image

D.range

Alarm1
Alarm2
NAV
Disp
Sonar
Next

2

Press the 【】 key.
The cursor appears in the set item column.
(The cursor appears by pressing the

【Knob】.)

3

Select the set item you desire to change
with the 【】 key or 【】 key.
(The set item can be selected by rotating
the 【Knob】.)

Range mode

Shift

Zoom select

Zoom range

Zoom start

Range preset

Return

Manual

0m

0m

10.0m

Bottom

Adjust

Image

D.range

Alarm1
Alarm2
NAV
Disp
Sonar
Next

4

Press the 【】 key.
The set menu corresponding to the
selected item is displayed.
(It can be displayed by rotating the

【Knob】.)

Shift

10

0~300 m

Range mode

Auto range

Manual

Auto shift

10

5

Change the set content with the 【】 key
or 【】 key.
(It can be changed by rotating the [Knob].)

6

Press the 【】 key.
The cursor returns to the set item column.
(It can be displayed by rotating the

【Knob】.)

7

To select the menu name of other, press

Menu column

Adjust

Image

D.range

Alarm1

Alarm2

NAV
Disp

Sonar

Next

Image speed

IR

Color rejection

Noise rejection

TGV

TX power
Return

1/1

Strong

0%

0

Medium

Auto

Guide

Name of menu selected

Setting item column

I

t is displayed when the [Operation Guide] is set to ON.

(See [3.4 Setting of System Item].)

Setting value

Cursor

Chapter 2 How to use the Menu CVS-126

2-2 0093132702-02

the 【】 key.
The cursor returns to the menu column.

8

Press the 【MENU】 key to close the
menu.

2.2

2.22.2

2.2 Change of Image
Speed

The image speed of echo sounder can be
changed. Even if the school of fish and bottom
are same, the image changes depending on the
image speed.

The setting of image speed is shown by the
comparison with the normal image speed “1/1”.

“2/1” image speed is two times the normal
image speed. “1/2” is a half time the normal
image speed. When “Stop” is selected, the
image speed is stopped.

1

Press the 【MENU】 key.

2

Select the [Adjust] → [Image Speed].

3

Change the setting of [Image Speed].

Image speed

2/1

1/1

Stop
1/1.5
1/2
1/2.5
1/3
1/3.5
1/4
1/4.5

4

Press the 【MENU】 key to close the menu

2.3

2.32.3

2.3 Rejection of
Interference

Interference Rejection

The interference noise from the echo sounder
of other boats can be reduced.

If a neighboring boat uses the echo sounder

having the same frequency and same firing
times as those your boat has, the interference
noise may be displayed. If you set the
interference rejection, the interference noise
can be reduced. In the order of weak → strong,
the noise rejection capability becomes high.

OFF

Weak

Strong

Image of school of fish

Interference image

1

Press the 【MENU】 key.

2

Select the [Adjust] → [Interference Rejection].

3

Change the setting of [Inference
Rejection].

IR

OFF

Weak

Strong

4

Press the 【MENU】 key to close the
menu.

2.4

2.42.4

2.4 Color Rejection of
Weak Echo

Color Rejection

The color of weak echo can be rejected.

Rejecting noise on the entire image and weak
echo around the school of fish makes it easier
to see the school of fish. It is the convenient
function when displaying the echo stronger
than the specific signal. (setting:0～50%)

1

Press the 【MENU】 key.

2

Select the [Adjust] → [Color Rejection].

CVS-126 Chapter 2 How to use the Menu

0093132702-02 2-3

3

Change the setting of [Color Rejection].

4

Press the 【MENU】 key to close the
menu.

2.5

2.52.5

2.5 Rejection of Noise

Noise Rejection

The influence of noise can be reduced.

Due to echo reflected from plankton and trash,
the speck-like noise may appear on the entire
image. Setting the [Noise Rejection] reduces
the speck-like noise and makes it easier to see
the image of school of fish.(setting:0～10)

The greater the set value becomes, the
stronger the effect of noise rejection becomes.

1

Press the 【MENU】 key.

2

Select [Adjust] → [Noise Rejection].

3

Change the setting of [Noise Rejection].

Noise Rejection

5

4

Press the 【MENU】 key to close the
menu.

2.6

2.62.6

2.6 Setting of Shift

The [Fixed Shift] and [Auto Shift] are provided.

Fixed Shift:

The image range is shifted up and
down.(setting:except ft:0～300,ft:0～1000)

Auto Shift:

Since the bottom is always displayed in the
lower side, if the depth changes, the image is
shifted automatically. (In the depth direction)

Setting of Fixed Shift

The scope of range starting with the shift value
is displayed.

1

Press the 【MENU】 key.

2

Select [D. Range] → [Shift].

3

Change the set value of [Shift].

Shift

10

0~300 m

4

Press the 【MENU】 key to close the
menu.

Setting of Auto Shift.

The image is automatically shifted so that the
bottom is always displayed.

1

Press the 【MENU】 key.

2

Select [D. Range] → [Range Mode].

3

Select the [Auto Shift].

Range Mode

Auto Range

Manual

Auto Shift

10

4

Press the 【MENU】 key to close the menu.
[R: AS] is displayed at the upper side of
menu.

2.7

2.72.7

2.7 Setting of Zoom Range

Set the zoom range in each mode of [BTM],
[Bottom Discrimination], [Zoom], [Bottom Zoom]

Color Rejection

0

%

Chapter 2 How to use the Menu CVS-126

2-4 0093132702-02

and [Bottom Follow Zoom]

The zoom range of each mode is identical.

(See [1.4

Switch-over of Menu

].)

(setting:except ft:2.5～200,ft:10.0～650)

Zoom Range

1

Press the 【MENU】 key.

2

Select [D. Range] → [Zoom Range].

3

Change the set value of [Zoom Range].

Zoom Range

10.0

m

4

Press the 【MENU】 key to close the
menu.

2.8

2.82.8

2.8 Setting of Zoom Start

Select the zoom start in the [Zoom].

(See [1.4

Switch-over of Menu

].)

(setting:except ft:0～800,ft:0～2800)

Zoom Start

1

Press the 【MENU】 key

2

Select [Display Range] → [Zoom Start]

3

Change the set value of [Zoom Start].

Zoom start

10

0~800 m

4

Press the 【MENU】 to close the menu.

2.9

2.92.9

2.9 Setting of Background
Color

Responding to the ambient brightness, the
background color of display can be changed.

1

Press the 【MENU】 key.

2

Select [Display] → [Background Color].

3

Change the setting of [Background Color].

4

Press the 【MENU】 to close the menu.

2.10

2.102.10

2.10 Setting of White Line

As the surface of bottom is marked with the
white line of constant width, the school of fish at
the bottom can be easily identified.

White line

1

Press the 【MENU】 key

Background

Pale blue

Marine blue

Blue
Dark blue
Black
Pale gr. bl.
Sea green
Dark sea gr.
White

Night mode

CVS-126 Chapter 2 How to use the Menu

0093132702-02 2-5

2

Select [Disp] → [White Line].

3

Change the setting of [White Line].
“1” is narrowest. “5” is widest.
In the auto mode, responding to the
strength of echo reflected from the bottom,
the width of white line changes.

White line

OFF

1

2
3
4
5
Auto

4

Press the 【MENU】 key to close the
menu.

2.11

2.112.11

2.11 Preset of Range

The range switched with the 【 range 】 key
can be set.

Preset the set value suitable for you purpose.

(setting:except ft:0～800,ft:0～2800)

1

Press the 【MENU】 key.

2

Select [Display Range] → [Range Preset]
→ [Range 1 to 8].

3

Select the set value of [Range 1 to 8].

Range1

20.0

m

4

Press the 【MENU】 key to close the
menu.

2.12

2.122.12

2.12 Setting of Alarm

6 alarms of bottom alarm, fish alarm, water temp
alarm, speed alarm, arrival alarm and XTE alarm
can be set.

They are notified by alarm sound and alarm
display.

[Bottom alarm] issues the alarm when the
position recognized as the bottom is shallower
than the upper limit or deeper than the lower
limit. It is convenient when keeping the specific
depth.

(setting:except ft:0～800,ft:0～2800)

[Fish alarm] issues the alarm when an echo
recognized as school of fish exists in the set
range.

(setting:except ft:0～800,ft:0～2800)

It is convenient for you to judge whether the
echo of school of fish is present or not.

(setting:except ft:0～800,ft:0～2800)

Caution: In the [Level], select the strength

of echo reflected from the school
of fish in the [Fish alarm].

[Water temp alarm] issues when the water temp
is within or out of the set range. It is convenient
to keep the specific water temp region.(setting:-5
～45℃,23～113ºF)

[Speed alarm] issues when the boat speed is
faster or slower than the set range. It is
convenient when the speed limit is
obliged.(setting:0～80)

[Arrival alarm] can be used in the state that the
destination is set. The alarm is issued when your
boat arrives within a certain range of destination.
A certain range is set in the [NAV alarm range].

(See [1.7

Use of 【Event】 key.)

[XTE alarm] can be used in the state that the
destination is set. The alarm is issued when your
boat is off a certain distance from the course on
the line drawn straightly from destination to the
location when setting the destination. A certain
distance is set in the [NAV alarm range].

In the [NAV alarm range], select the alarm
range of [Arrival alarm] and [XTE
alarm].(setting:5～999m)

Stopping the alarm sound

To stop the alarm sound and the alarm display,
press 【MENU】 key.

Chapter 2 How to use the Menu CVS-126

2-6 0093132702-02

Setting the alarm

1

Press the 【MENU】 key.

2

Select your desired alarm from [Alarm 1] or
[Alarm 2].

3

Select the [ON] of alarm you desire.

4

If the setting of [Alarm range] is provided in
the alarm desired, select the alarm range.

5

Change the set value of alarm range.

6

Press the 【MENU】 key to close the
menu.

Release the alarm.

1

Press the 【MENU】 key.

2

Select the alarm to be released from
[Alarm 1] or [Alarm 2].

3

Select the [OFF] of alarm to be released.

4

Close the menu with the 【MENU】 key.

Confirm the alarm state.

The set state of [Bottom alarm] and [Fish alarm]
can be confirmed on the bar at the right corner
of display. However, when the display is out of
the range, they are not displayed.

The set state of [Water temp alarm], [Speed
alarm], [Arrival alarm] and [XTE alarm] can be
confirmed by the icons at the upper side of
display.

[Bottom alarm]

[Fish alarm]

[Water temp alarm]

[Speed alarm]

[Arrival alarm]

[XTE alarm]

2.13

2.132.13

2.13 Preset/ WPT edit/ WPT

delete of Destination

NAV Start.

The NAV can be started by selecting the
destination from the destination list.

To perform the NAV start, the destination must
be preset.

(See [1.7

Use of 【Event】 key].)

1

Press the 【MENU】 key.

2

Select [NAV] → [NAV start].

3

Select the [Destination list] preset.

Bottom alarm

Upper depth

Lower depth

Fish alarm

Position

Range

Level

Return

Water temp warm

Upper temp alarm

Lower temp alarm

Speed alarm

Speed limit

Arrival alarm

XTE alarm

NAV alarm range

Return

OFF

5m

50m

OFF

5m

50m
Medium

OFF

C

C

20.0

15.0

OFF

0kt

OFF
OFF

10m

Adjust

Image

D.range

Alarm1

Alarm2

NAV
Disp
Sonar
Next

Adjust

Image

D.range

Alarm1

Alarm2

NAV
Disp
Sonar

Next

CVS-126 Chapter 2 How to use the Menu

0093132702-02 2-7

Caution: The list No. selected is reversed

in red.

4

After selecting the number, press the 【】
key or the 【Knob】.

5

Select the [Yes] in the confirmation menu
and press the 【MENU】 key.
Then, the NAV starts.

NAV starts

Yes

No

Cancel the NAV.

The NAV started can be canceled halfway.

1

Press the 【MENU】 key

2

Select [NAV] → [NAV cancel].

3

Press the [Yes].

NAV cancel

Yes

No

4

Press the 【MENU】 key. Then, the NAV is
released.

Edit the destination.

By entering the latitude and longitude, the
destination can be preset.

The list preset in the past can be edit.

1

Press the 【MENU】 key.

2

Select [NAV] → [WPT edit].

3

Select the list No. to be edited from the

[WPT edit] list.

4

After selecting the number, press the 【】
key or the 【Knob】.

5

Select the character with the 【 】 key or

【 】 key. ( character: A～Z,blank,0～

9,+,-./)

6

Move the position of characters to be
reversed with the 【】 key or 【 】key.

Caution: At this moment, if the [Knob] is

Chapter 2 How to use the Menu CVS-126

2-8 0093132702-02

pressed, the setting is cancelled
and the menu returns to the
menu item.

Caution: If the values of latitude and

longitude are abnormal or are
not entered, they cannot be
preset.

7

After finishing the edit work, press the

【MENU】 key.

8

Select the [Preset] in the confirmation
menu and press the 【MENU】 key. Then,
the edit is finished.

Edit is finished

Yes

No

Delete the destination.

The destination list preset in the past can be
deleted.

The deletion takes some time.

1

Press the 【MENU】 key.

2

Select [NAV] → [WPT delete].

3

Select the list number of destination to be
deleted from the [WPT delete].

4

After selecting the number, press the 【】
key or the 【Knob】.

5

Select the [Yes] in the confirmation menu
and press the 【MENU】 key.
Then, the destination is deleted.

Caution: If the 【【【【Knob】】】】 is pressed at this

moment, it is canceled.

6

Press the 【MENU】 key. Then, the
destination is deleted and the menu closes.

Recall the image stored and preset it

as a destination.

Call the image stored in the past and it can be
preset as a destination.

(See [1.7

Use of

【Event】 key].)

1

Press the 【MENU】 key.

2

Select [NAV] → [Image recall].

3

Select the image No. from the [Image
recall] list.

Image recall

No. Comment
1

2

3
4

5

6
7

8

9
10

PIC00001
PIC00002
PIC00003
PIC00004
PIC00005

PIC00006
PIC00007

PIC00008
PIC00009

PIC00010

4

Press the 【 】key or the 【Knob】.

5

Move the cursor to the location preset as a
destination with the【】key or 【 】 key
and select it.

Destination is delete

Yes

No

CVS-126 Chapter 2 How to use the Menu

0093132702-02 2-9

Caution: You can switch to other stored

image with the 【【【【

】】】】

or 【【【【

】】】】

key.

6

When starting the NAV, press the

【EVENT】key.

7

When you do not start the NAV, press the

【MENU】 key.

2.14

2.142.14

2.14 Store/Recall/Deletion
of Image

Store the image.

The present image of echo sounder can be
stored.

To memorize, it takes some time.

To memorize the image, the 【EVENT】 key
must be switched to the [Store image].

1

Press the 【MENU】 key.

2

Select [NAV] → [EVENT key set].

3

Select the [Store image].

4

Press the 【MENU】 key to close the
menu.

5

When the echo sounder image to be stored
appears, press the 【EVENT】 key.

6

When the image store is fully filled, it
shows that the [Store image] is fully filled.
After deleting the unwanted image, try it
again.

Recall the stored image.

The image stored in the past can be recalled.

During recalling, the image cannot be stored.

1

Press the 【MENU】 key.

2

Select [NAV] → [Image recall].

3

Select the number of image to be recalled
from the [Image recall] list.

Image recall

No. Comment
1

2

3
4

5

6
7

8

9
10

PIC00001
PIC00002
PIC00003
PIC00004
PIC00005

PIC00006
PIC00007

PIC00008
PIC00009

PIC00010

4

After selecting the number, press the 【】
key or 【Knob】 to enter.

5

Press the 【MENU】 key to return to the
normal menu.

Caution: When other stored image exists

beside the recall image, switch
to other image with the 【【【【

】】】】

and

【【【【

】】】】

key.

Delete the stored image.

The image stored in the past can be deleted.

To delete, it takes some time.

1

Press the 【MENU】 key.

2

Select [NAV] → [Image delete].

3

Select the number of image to be deleted
from the [Image delete] list.

Cursor

（

red line

）

H

L

EVENT key set

Store pos

Store image

Homing

Chapter 2 How to use the Menu CVS-126

2-10 0093132702-02

Image delete

No. Comment
1

2

3
4

5

6
7

8

9
10

PIC00001
PIC00002
PIC00003
PIC00004
PIC00005

PIC00006
PIC00007

PIC00008
PIC00009

PIC00010

4

After selecting the number, press the 【】
key or 【Knob】 to enter.

5

Select the [Yes] in the confirmation menu
and press the 【MENU】 key.
Then, the preset image is deleted.

Add the comment to the stored

image.

It is convenient to judge the stored image.

1

Press the 【MENU】 key.

2

Select [NAV] → [Image comment].

3

Select the number of image to which the
comment is added from the [Image
comment].

Image comment

No. Comment
1

2

3
4

5

6
7

8

9
10

PIC00001
PIC00002
PIC00003
PIC00004
PIC00005

PIC00006
PIC00007

PIC00008
PIC00009

PIC00010

4

After selecting the number, press the 【】
key or the 【Knob】.

5

Select the character with the 【】 key or

【】 key.( character: A～Z,blank,0～

9,+,-./)

Image comment

No. Comment
1

2

3

P I C00001

P I C00002

P I C00003

6

Select the comment position with the 【】
key or 【】 key.

1

2

3

P I C00001
P I C00002
P I C00003

Image comment

No. Comment

Caution: At this moment, if the 【【【【Knob】】】】 is

pressed, the setting is cancelled
and the menu returns to the
menu item.

7

After finishing the edit, press the 【MENU】
key.

8

Select the [Register] in the confirmation
menu and press the 【MENU】 key. Then,
the edit is finished.

Edit is finished

Register

Not register

2.15

2.152.15

2.15 Selection of Zoom

Set the zoom display with the display mode
([zoom (H)] or [zoom (L)].

The [Bottom], [Bottom Discrimination], [Zoom],
[[Bottom Zoom] and [Bottom Follow Zoom] are
provided.

(See [1.4

Switch-over of Menu

].)

1

Press the 【MENU】 key.

2

Select [Display range] → [Zoom image].

3

Select the zoom image.

Confirm image

Yes

No

CVS-126 Chapter 2 How to use the Menu

0093132702-02 2-11

4

Press the 【MENU】 key to close the
menu.

For each zoom display, refer to [1.4 Switch-over
of display].

2.16

2.162.16

2.16 Selection of NAV
Display

The information can be displayed on the NAV
display (NAV 1, NAV2).

Type of NAV Display

Depending on the division method (2 division, 4
division), the information to be displayed differs.

2 division

Information displayed in 1 and 2
Simple plotter, speed meter and compass

4 division

Information to be displayed in 1 to 4
Wpt dist dir., Time required, Wind dir., Wind
speed, depth, Lat/Lon, Boat speed, course,
water temp, Heading and XTE

Dividing Method of Display

1

Press the 【MENU】 key.

2

Select [Display] → [NAV 1] → [NAV 2].

3

Select the dividing method (2 division, 4
division).

4

Press the 【MENU】 key to close the
menu.

Selection of NAV Menu

1

Press the 【DISP】 key.

2

Select the [NAV1/Normal (H)] or the
[NAV2/Normal (L)].

3

Press the 【 】key.
The [NAV1 display1] is displayed.

4

Select by rotating the 【Knob】.

5

To change the [NAV 2], press the 【】

2

4

NAV1

Zoom select

BTM.

Zoom
B.Z.

B.D.

B.F.Z.

NAV display1

Simple Plotter

Simple plotter

Speed meter

Compass

display1

display2

RNG

BRG

HDG

Water temp

The time required

Course

Wind dir.

XTE

Lat/Lon

Boat speed

Wind speed

Depth

display1

display2

display3

display4

Chapter 2 How to use the Menu CVS-126

2-12 0093132702-02

key.

Caution: Every time when pressing the

【【【【

】】】】

key, the [Display] switches

in the order of [NAV1] to [NAV4].

6

Select the [NAV] by rotating the 【Knob】.

7

Press the 【MENU】 key to close the
menu.

2.17

2.172.17

2.17 Explanation of Sonar

Switch-over of Sonar Tone

The sonar can be outputted to the built-in
speaker by selection.

The school of fish and condition of bottom on
the display of echo sounder can be confirmed
by hearing the sonar.

Sonar tone

OFF

ON

1

Press the 【MENU】 key.

2

Select the [Sonar] → [Sonar tone].

3

Select the [ON] or [OFF] of Sonar tone].

Caution: When set to [OFF], the built-in

speaker does not output the
sonar.
When set to [ON], the built-in
speaker outputs the sonar.

4

Press the 【MENU】 key to close the
menu.

Connection of External Speaker

Connect the external speaker with amplifier
(option) so that you can hear the sonar easily.

The sonar is always outputted. Adjust the
speaker volume with the volume provided on
the speaker.

Caution: The external speaker is an option.

2.18

2.182.18

2.18 Explanation of Menu
Item

The various items in the menu are explained.

TVG

The TVG corrects the difference of strength
between echo reflected from the shallow depth
and echo reflected from deep depth so that the
reflection can be uniformed.

The deeper the depth is, the weaker the
reflected signal of echo sounder becomes due
to attenuation. Thus, comparing with the signal
reflected from the same size fish in the shallow
depth, the signal reflected from the fish in the
deep depth becomes weak. The TVG corrects
the echo signal reflected from the deep depth to
be equal to that reflected from shallow depth by
increasing the receiver gain so that the effect
that the strength of echo signal reflected from
the deep depth looks same as that reflected
from the shallow depth provided. The correction
gain due to the depth increases in the order of
weak → medium → strong. When set to “weak”,
the TVG also provides the effect that reduces
noise in the shallow depth.

1

Select the [Adjust] → [TVG].

2

Select the [weak, medium, strong].

TVG

Weak

Medium

Strong

Change the TX power.

The strength of transmission output (power)
can be changed.

When the noise of interference with the
neighboring echo sounder occurs, if the powers
of transmission outputs at both sides are
weakened, the interference noise can be
suppressed.

In the [Auto] setting, the transmission output is
automatically adjusted.

CVS-126 Chapter 2 How to use the Menu

0093132702-02 2-13

Image speed

IR

Color Rejection

Noise Rejection

Clutter

TGV

TX power

Return

1/1

Strong

0%

0.0

5

Medium
Auto

Adjust

Image

D.range

Alarm1
Alarm2
NAV
Disp
Sonar
Next

1

Select the [Adjust] → [TX power].

2

When selecting the smaller number, the
transmission power becomes weak.

TX power

1

Auto

20
30
40
50

60
70
80
90
100

Display the A scope. / Stop the

display of A scope.

The echo strength of latest echo can be
displayed at the right side of echo sounder
display.

The strength of echo sounder image is
expressed by the horizontal width. This
expression is called [A scope].

The width for strong echo is wide and the width
for weak echo is narrow. This makes it easier
for your to see the echo.

A scope

White line

Background color

Color tone

Depth value

Water temp graph

Return

OFF

OFF

Marine blue

64 color

Large

OFF

Adjust

Image

D.range

Alarm1
Alarm2
NAV
Disp
Sonar
Next

1

Select the [Display] → [A scope].

2

To display the A scope, select the [ON].
To stop the display of A scope, select the
[OFF].

Change the display color of echo

sounder image

The [Monochrome], [8 color], [16 color] and [64
color] can be selected.

1

Select the [Display] → [Color tone].

2

Select the [Color tone].

Change the depth value.

The display size of depth value and the scale
value can be changed.

1

Select the [Display] → [Depth display].

2

Select the size of display.

Display the water temp graph. / Stop

the display of water temp graph.

The latest water temp value and the graph of
past water temp data can be displayed.

1

Select the [Display] → [Water temp graph].

2

To display the water temp graph, select the
[ON].
To stop the display of water temp graph,
select the [OFF].

Disp Width

When the image is zoomed or the High
frequency / Low frequency displayed, the disp
width can be changed.

Chapter 2 How to use the Menu CVS-126

2-14 0093132702-02

Disp width

Image swap

NAV 1

NAV 2

Return

Center

A B

2

4

Adjust

Image

D.range

Alarm1
Alarm2
NAV
Disp
Sonar
Next

1

Select the [Disp] → [Disp. width].

2

Select the width of image.

Image Swap

The images of echo sounder at the right and left
sides can be swapped.

1

Select the [Display] → [Image swap].

2

Select the swap state.

CVS-126 Chapter 3 How to use the system menu

0093132702-02 3-1

Chapter 3 How to use the system menu

3.1

3.13.1

3.1 Display of System Menu

After powering on, besides the menu displayed
first with the 【MENU】 key, the system menu, of
which setting is not frequently changed, is
provided.

[In out],[Correct],[System],[Setting],[Maintain]

Display the system menu

1

Press the 【MENU】 key.

2

Select the [Next].

In out

Correct

System

Setting

Maintain

Adjust

Image

D.range

Alarm1
Alarm2
NAV
Disp
Sonar
Next

3

Press the 【】 key to display the system
menu.

Prev

Correct

In out

System
Setting
Maintain

Adjust

Image

D.range

Alarm1

Alarm2

NAV
Disp

Sonar

Return to the normal menu.

1

Select the [Prev].

2

Press the 【】 key to display the normal
menu.

3.2

3.23.2

3.2 Setting of External
In/Out

Set the setting related to the input/output.

Buzzer Setting

Temp source

Speed source

Baud rate

NMEA monitor

OFF

Sensor

Sensor

4800

OFF

NMEA output data

Return

Prev

Correct

In out

System
Setting
Maintain

Buzzer Setting

Set the buzzer sound to ON/OFF.

Temp Source

Switch the Sensor/NMEA.

Use the built-in water temp meter for sensor.

Use the external input value for NMEA.

Speed Source

Switch the Sensor/NMEA.

Use the built-in speed meter for sensor.

Use the external input value for NMEA.

Baud Rate

Change the transmission speed of external
input/output.

Match the transmission speed with that of
external equipment connected.(setting:
4800,9600,19200,38400)

Chapter 3 How to use the system menu CVS-126

3-2 0093132702-02

NMEA Monitor

The external input data can be displayed.

To return to the original menu, press the

【MENU】 key.

NMEA Output Data

The output of NMEA sentence can be set to
ON/OFF.

1

Select the sentence name.

2

Press the 【】 key.

Prev

DBT

DPT

GGA

MTW

TLL

VHW

VTG

ZDA

ON

ON

OFF

OFF

ON

OFF

OFF

OFF

Return

Prev

Correct

In out

System
Setting
Maintain

3

Select the ON/OFF.

4

Select the [Prev].

5

Press the 【】 key.

Caution: If you omit steps 4 and 5, the

setting is valid. But, when
selecting the [In out] menu next,
the [NMEA out data] is displayed.

3.3

3.33.3

3.3 Setting of Correct Item

Draft Set

The tolerance of depth can be corrected.

Set the depth from the sea level to the set depth
of your transceiver/receiver. Normally set draft
value of your boat.(setting: expect ft:-10.0～

10.0,ft:-30.0～30.0)

Sonic Speed

Set the [Seawater] or [Freshwater].
Change to meet the usage,

Water Temp

The error of water temp value can be corrected.

(setting:-10.0～10.0℃,-10～10°F)

Boat Speed

The tolerance of boat speed value can be
corrected.

When the [Speed source] is set to the [Sensor], it
is corrected by %. (setting:-50～50%)

When the [Speed source] is set to the [NMEA], it
is corrected by numeral. (setting:-10.0～10.0)

Draft set

Sonic speed

Water temp

Boat speed

Return

Seawater

0.0m

C

0.0

0%

Prev

Correct

In out

System
Setting
Maintain

Inner-hull

0

CVS-126 Chapter 3 How to use the system menu

0093132702-02 3-3

Inner-hull

The reduction in sensitivity due to signal
attenuation in inner-hull use can be corrected.

（setting:0～10: through-hull: 0）

1

Select the ［Correct］→［Inner-hull］.

2

Press 【 】key. The image displays bottom
only. It may show very strong fish targets.

3

Adjust the number to have the thickness of
bottom to be 4-5mm on the image with High
frequency (200 kHz) at 50-100m depth.

4

Press 【 】key.

Caution: Inner-hull setting value widely

varies upon installation
conditions such as material of
hull and installation method. Low
frequency (50 kHz) may not be
used due to large signal
attenuation.

3.4

3.43.4

3.4 Setting of System Item

Simple Menu

Set the simple menu display.

The items displayed in the menu are limited only
to the setting items of minimum requirement.

When making the setting change fewer, it is
convenient.

Operation Guide

When displaying the menu, it sets whether or not
the operation guide is displayed at the lower part
on the display.

When setting to “No display of operation guide”,
the echo sounder image can be easily seen at
the menu operation.

FUNC key set

Set the function assigned to the 【FUNC】 key.

(See [1.8

Use of 【FUNC】 key

].)

Language

Switch to the language to be displayed.

(See [1.2

Power On/ Off

].)

Simple menu

Operation Guide

FUNC.key setting

Language

Return

ON

OFF

Image speed

English

Prev

Correct

In out

System
Setting

Maintain

Inner-hull image

4-5mm

Bottom

Chapter 3 How to use the system menu CVS-126

3-4 0093132702-02

3.5

3.53.5

3.5 Setting of Basic Set
Item

Range & Speed Unit

It switches the display unit to [nm, kt] or [km,
km/h].

Depth Unit

It switches the unit of depth to fm, l.fm and ft.

Temperature Unit

It switches the unit of temperature to °C, °F.

Local time Offset

The local time offset can be set by 0.5 hours (30
minutes) unit. (setting:-11.0～14.0h)(UTC:0.0)

GPS select

It selects whether the GPS sensor is the KODEN
made one or not.

GPS initialize

It is valid only when KODEN GPS is connected.

The GPS sensor is initialized.

When connecting the GPS sensor other than
KODEN GPS, do not use this item.

3.6

3.63.6

3.6 Maintenance Menu

Simulation

When the [Simulation] is set to ON, the pseudo
image of echo sounder is displayed.

Initialize

It returns all the settings in the menu to the
factory settings. However, the memorized data of
display remains unchanged.

Caution: It returns to the factory settings

and the power is automatically
shut down.

System Check

It is used for diagnostic test.

(See [4.5

Diagnostic Test ].)

All WPTs deletes

All WPT lists can be deleted.

All stored image deletes

All stored image lists can be deleted.

Simulation

Initialize

System check

All WPTs:DLT

Return

No

OFF

Prev

Correct

In out

System
Setting

Maintain

All IMG DT:DLT

CVS-126 Chapter 4 Maintenance and Inspection

0093132702-02

4-1

Chapter 4 Maintenance and Inspection

4.1

4.14.1

4.1 Inspection

The daily maintenance and inspection extends the life of equipment. To always keep the equipment in
the best condition, implement periodically the inspection shown in the table below.

Item Content of Inspection

Connector at the rear of
CVS-126 Display unit

Check the looseness.

Wiring of cables Check the wiring of cables connecting the equipment and the

damage of cable.

Grounding of display unit Scrape the rust off the ground terminal and make its contact well.

4.2

4.24.2

4.2 Cleaning

CVS-126 Display unit

To protect the LCD and enhance the visibility of display, the acrylic filter is installed to the surface of
CVS-126 Display unit. If this part is dirty, an image becomes unclear. So, dip the soft cloth in the neutral
or alcohol detergent and wipe the filter surface lightly with the cloth wrung lightly.

Transducer

In case of through-hull equipped transducer, check the surface of opening of transducer (portion form
which the ultra-sonic is emitted). If shells and oil are stuck, scrub the surface with a wooden or bamboo
knife with caution not to damage the surface and remove stuck matters. If you scrub strongly, the
surface will be damaged, resulting in deteriorated performance of transducer.

4.3

4.34.3

4.3 Fuse Replacement

If the input voltage is too high, the over-current flows or a trouble occurs inside, the fuse will blow out.
The fuse is housed in the power cable.

Caution

NEVER use a

thinner solvent. If done so, the filter

surface will chemically decompose, resulting in
of transparency.

Thinner

Warning

Use the specified fuse. If you use a fuse other than
specified one, it may lead to a serious accident.

Chapter 4 Maintenance and Inspection CVS-126

4-2 0093132702-02

4.4

4.44.4

4.4 If you suspect a trouble

Symptom Trouble cause Countermeasure

Even if the power is
powered on, nothing is
displayed.

• Blown fuse.

• The power voltage is out of

specification (10.8 to 31.2
VDC).

• Poor connection between
power cable and battery.

• Exchange a fuse.(See [4.3 Fuse
Replacement])

• Use a proper power as per
specification.

• Confirm a connection between the
power cable and the battery.

The unit starts up. But,
nothing is displayed on
the display.

• Connection between
transducer and display unit.

• Defect of LCD display block.

• Confirm a connection between

Transducer and Display unit.

• Consult a repair shop or the
distributor in your market.

Too much interference
and noise.

• Installed position of
transducer.

• Interference from the echo
sounder on other boat.

• Confirm the position of transducer.
(See [5.3 Installation of
Transducer])

• Apply the interference rejection.
(See [2.3 Rejection of
Interference])

The display of water
temperature / boat speed
is abnormal or not
displayed.

• Connection of sensor
connector.

• Input source of water
temperature sensor / speed
sensor.

• Confirm the connection of the sensor
connector.

• Confirm the input source.

The display of present
location/course is
abnormal or not
displayed.

• Connection between this unit
and navigation equipment.

• Confirm a connection between
Display unit and the navigation
equipment.

CVS-126 Chapter 4 Maintenance and Inspection

0093132702-02

4-3

4.5

4.54.5

4.5 Diagnostic Test

Perform the operation diagnosis.

When checking the operation diagnosis of panel
key, the state of sensor inside and the version of
software, it is using.

Diagnose.

① displays the diagnostic result.

The result of ROM and RAM check displays OK
when normal and NG when abnormal.

Caution: To test the NMEA, TEMP and

SPEED, the special jig is
necessary.

② implements the key input test. When pressing
the key, the color of a part corresponding to the
pressed key changes.

When pressing the [Knob], the LCD test is
performed.

Confirm the version.

③ displays the information on the version of
software.

When inquiring, inform us of verXX.XXX.

Return to the normal menu.

Press the 【MENU】 key for more than 3
seconds.

R O M
R A M
N M E A O K N G
V O L T
T E MP

S P E E D

G A I N

①

②

③

KM-E67 Ver1.00 20080408
FishSnd ver01.00 Jan 23 2008 09:18:54
Ipl ver01.00 Jan 24 2008 15:21:33

SimData ver01.00 Jan 24 2008 15:21:33
TOP.ncd 3s400ft256 2008/03/26 14:38:31

Chapter 5 Installation CVS-126

5-1 0093132702-02

Chapter 5 Installation

5.1

5.15.1

5.1 Item of Caution on Installation

To exercise fully the performance of echo sounder, the installation of CVS-126 must be performed by
an engineer who is officially authorized by our company. The installation work includes the following
content.

(1) Unpacking the configuration items

(2) Inspection of configuration unit, spare, accessories and material for installation

(3) Check of power voltage and capacity of current

(4) Decision of installing location

(5) Installation of CVS-126 Display unit and transducer

(6) Installation of accessories

(7) Plan and execution of cable laying and connection

(8) Adjustment after completion of installation

Unpacking the configuration parts

Unpack the configuration items and confirm that all of the items match with the contents on the
equipment configuration list. If not matched, Contact the dealer you purchased or our sales company.

Inspection of configuration items and accessories

Inspect the appearance of each configuration item and accessories and check that no dents or
damage exist.

If any dents or damage exists and they are believed to be caused by accident during transportation,
contact the transportation and insurance company and consult our sales company or our dealer
nearest to you.

Decision of Installing Location

To exercise fully the performance of equipment, install the equipment, considering the points
mentioned below.

(1) Install the equipment at the location in the bridge so that its display can be easily seen.

(2) Select a safe location where the equipment is not exposed to humidity, water splash, rain and

direct sunshine.

(3) Keep enough space for maintenance. Especially, secure enough space at the rear panel where

many cables are concentrated.

(4) Keep the equipment as far away from the wireless transmitter/receiver as possible.

CVS-126 Chapter 5 Installation

0093132702-02 5-2

The equipment is not waterproofed. Avoid excessively damp place. Do not
install the equipment in place suffering from excessive water-drops.
Otherwise, the inside of display window mists over or corrosion may occur
inside.

Laying and Connection of Cable

(1) Keep the transducer and power cable as far away from the cables of other electronic equipment

as possible.

(2) The cabinet of CVS-126 Display unit is securely grounded to the hull, using the ground terminal on

the rear panel.

Caution: The ground side of power input of this equipment is connected to the ground

terminal.
In case of + (positive) ground, it cannot be used. The power may short-circuit.

(3) If you connect the power cable directly to the battery, the interference from other electronic

equipment is not subject to occurrence. (See Fig. 5.1.)

Fig. 5.1 Connection of Power Line

Confirmation after Installation

Be sure to confirm the following items before starting up this equipment. The confirmation is mandatory
to operate the equipment normally.

(1) Is the power voltage in the boat within the appropriate voltage range? Is the current capacity

enough?
Voltage Range: 10.8 to 31.2V when measured at the power connector input.

(2) Is the wiring of transducer cable correct? Is the wiring shorted?

5.2

5.25.2

5.2 Installation of CVS-126 Display unit

CVS-126 Display unit can be desk-top installed or flush-mount installed.

It cannot be installed in other method (Example: Suspended installation). Install in the following
procedure.

Good example

Bad example

CVS-126 Display unit

CVS-126 Display unit

Battery Battery

Noise

Noise

Chapter 5 Installation CVS-126

5-3 0093132702-02

Desk-top Installation

Fig. 5.2 Desk-top Installation

(1) Loosen the knob bolt fixing CVS-126

Display unit to the mounting bracket, push
the unit to the left side and pull the unit
upward.

(2) Place the removed unit to a safe and flat

place.

(3) Place the mounting bracket on the location

for the unit to be installed and fix it with
four screws (trans-tapping screws)
supplied with installing materials.

(4) Connect the connectors for power and

transducer to the unit respectively.

(5) Install the unit to the mounting bracket and

fix the unit by turning clockwise the knob
bolt

Flush-mount Installation

(1) Make a square hole (160mm x 160mm) at the location to be installed. (See Fig. 5.4.)

(2) Turn counter-clockwise the knob bolt fixing CVS-126 Display unit to the mounting bracket to

loosen it, push the unit to the left side and pull the unit upward. The mounting bracket and knob
bolt are no longer used.

(3) Confirm that the unit matches with the square holes. If not matched, correct the square hole.

(4) Remove the front frame of CVS-126 Display unit, pulling it toward you. (See Fig. 5.3.)

(5) Connect the connectors for power and transducer to the unit respectively.

(6) Install the CVS-126 Display unit in the installing location (square hole) and fix it with four tapping

screws (4mm) (M4 or pan-head). (Prepare 4mm screws suitable for thickness of installing
location.)

(7) Install the front frame removed in step (4).

Fixing screw 4

Knob bolt

Turn two turns the knob bolt to
loosen it and pull the unit upward.

CVS-

126 Display unit

Mounting bracket

CVS-126 Chapter 5 Installation

0093132702-02 5-4

Figure 5.3 Flush-mount Installation

Figure 5.4 Work of flush-mount installation hole

Fixing screw 4mm 4 pieces

R30

160 16

Not supplied

Threading hole

Front frame

Chapter 5 Installation CVS-126

5-5 0093132702-02

5.3

5.35.3

5.3 Installation of Transducer

The standard installation of this echo sounder is shown in figure 5.5.

Figure 5.5 Installation of Transducer

In case of Inner-Hull

Using the optional inner-hull kit (MFB-04), install the transducer to the inner side of ship’s bottom.

Caution on installation

(1) Select the location where no bubble is

generated during navigation.

(2) Select the relatively thin location of ship’s
bottom.

(3) Be sure to remove oil on the contact
surface. File the contact surface with sand
paper (#400) so that the adhesive strength will
increase.

(4) The adhered surface will dry in about two
hours.

(5) Leave the unit for a whole day and fill in
the coolant. More than 80% of the transducer
should be submerged in the coolant.

Caution: Confirm a place of the installation of inner-hull in the manufacturer of the ship and

so on. The inner-hull device is for more effective performance method. The gain falls
in comparison with the through-hull performance dramatically. Low frequency (50
kHz) may not be used due to large signal attenuation. Depth range performance
using 200 kHz Transducer in case of inner-hull will also be less about 50% than that
of through-hull.

Figure 5.6 Inner-Hull installation

CVS-126 Chapter 5 Installation

0093132702-02 5-6

In case of through hull

Install the transducer directly to the ship’s bottom

Installation Procedure

(1) Select the installing location.

(2) Remove the fixing nut and one piece of rubber packing.

(3) If the slope of ship’s bottom is greater than 5°, make a wooden base to fit to the slope of ship’s

bottom. To reduce the water resistance, cut the bow direction tip of wooden base at the outer side
of ship’s bottom in the triangle shape.

(4) Make holes at the installing location. If the wooden base is used, make holes in the wooden base.

(5) Thread the rubber packing in the transducer and then the cable.

(6) To prevent water from seeping through the gap between the transducer and the hole, fill out the

gap with FRP or silicon glue. (Glue the wooden base likewise.)

(7) Thread the rubber packing and fix it with the fixing nut firmly.

(8) Connect the transducer cable to the connector of CVS-126 Display unit.

Figure 5.7 Through-hull Installation

In case that the slope of ship

,

s bottom is less than 5

Fixing nut

Fixing nut

Rubber packing

Rubber packing

Rubber packing

Rubber packing

Less than 5

T

ransducer

T

ransducer

Ship

,

s bottom

Ship

,

s bottom

In case that the slope of ship

,

s bottom is greater than 5

Wooden base

Wooden base

Chapter 5 Installation CVS-126

5-7 0093132702-02

5.4

5.45.4

5.4 Wiring

Connection of Cable to CVS-126 Display unit

Connect the power cable and transducer to the connectors of CVS-126 Display unit.

Pin Assignment of Rear Connector

Pin assignment viewed from the rear of CVS-126 Display unit.

POWER TD

Power input

10.8~31.2VDC
NMEA data input output

GPS, plotter etc

Sonar tone output

Line output for speaker with amplifier

Power output

For power of GPS etc

T

ransducer

For 50/200kHz in common
Speed sensor data input
Water temperature sensor data input

GND

Sonar tone R

Sonar tone L
Power +
GND
NM E

A T

X

-

NM E

A T

X+

NM E

A R

X+

NM E

A R

X

­Power ­Shield
Sonar tone COM
Outside power

Speed sensor input

Speed sensor power

Transducer input output
Transducer shield
Transducer input output
Water temperature sensor power
Water temperature sensor input
Speed sensor GND

TD

POWER

CVS-126 Chapter 5 Installation

0093132702-02 5-8

Connection of Power Cable and Transducer

Connect the power cable to the [POWER] connector and the transducer to the [TD] at the rear of
CVS-126 Display unit connector.

Connection of DC power cable (CW-264-2M)

To [POWER] connector

3.5 stereo jack

DC+ (Red)

DC- (Black)

Caution: Wind the insulation tape around the un-used lead wire for core-wires not to contact

each other.

Connection of transducer

To [TD] connector

Grounding

• Use heavy gauge cable for grounding wire.

• Connect the grounding wire to the grounding material in a short distance.

• When connecting the external equipment of which positive polarity is connected to the ground line,

do not connect the ground of signal line to the cabinet ground.

Chapter 5 Installation CVS-126

5-9 0093132702-02

Connection with external equipment

The DC power cable contains the connection cables for external equipment such as navigation
equipment and KODEN GPS sensor.

Color Pin

Remark

Red ③ Power input+ (with 2A fuse)

Black ⑨ Power input- (with 2A fuse)

Orange ⑥ NMEA data output +

Blue ⑤ NMEA data output -

White ⑦ NMEA data input +

Green ⑧ NMEA data input -

Color Pin

Remark

White ②

Red ①

Black ⑪

External speaker output
(with ø3.5 stereo jack)

Yellow ⑫ Outside power

Gray ④ GND

Shield ⑩

Connection with GPS-20A

After soldering, implement the waterproof and insulation treatment on the connected part with the
self-melting tape.

CVS-126

DC power cable

(CW-264-2M)

GPS-20A（No Type）

Connecting up without using a

connector

GPS-20A（Type B）

Connecting up using a

connector*

Color Remark Color

Pin

Orange

NMEA data output +

Orange

②

Blue NMEA data output -

Blue

③

White NMEA data input + White

④

Green NMEA data input - Green

⑤

Yellow

Outside power Red

⑥

Gray GND Black

①

*Optional connector (LTWBD-06PMMP-LC) is necessary.

CVS-126 Chapter 5 Installation

0093132702-02 5-10

Connection with Speed Sensor or Water Temperature Sensor (Option)

When installing the optional speed sensor or water temperature sensor, connect to the [TD] connector
together with the transducer via the transducer cable (Type: CW-840-0.3M). For wiring, see the figure
below.

After soldering, implement the waterproof and insulation treatment on the connected part with the
self-melting tape.

Structure of Transducer Cable

Connection Table of Transducer

Transducer Cable Transducer

TD-500T-2 No. of 2 core shield Color of 2 core shield

TD-500T-3
3 Orange Red
4 Shield Shield
5 White White

Connection Table of Speed Sensor and Water Temperature Sensor

Transducer Cable Water Temperature Sensor / Speed Sensor

No, of lead

wire

Color of lead

wire

T-81 ST-80

ST-80-1

ST-90

ST-90-1

ST-100

ST-100-1

1 Blue — Green Green Green

2 Violet — Red Red Red

6 Green Gray White White White

7 Red Gray Brown Brown Brown

8 Black — Shield Shield Shield

2 core shield wire

TD1 (Orange)

TD2 (White)

Shield

SPD.PULSE (Blue)

SPD.VCC (Violet)

SPD.GND (Black)

TEMP.VCC (Green)

TEMP.SIG (Red)

lead wire

To the speed sensor

To the water temperature sensor

Chapter 5 Installation CVS-126

5-11 0093132702-02

Connection of External Speaker (Prepared by a customer)

The ø3.5 stereo jack is provided to the power cable.
If you connect the speaker with the amplifier to the external, you can clearly hear the sonar sound.
Adjust the volume of speaker with the amplifier equipped to the speaker

3.5 stereo jack

5.5

5.55.5

5.5 Serial Data

Input Data

The sentences of GGA, GLL,HDT, MTV, MWV, RMC, VHW, VTG and ZDA can be received.
The type of NMEA0183 Ver.1.5, Ver.2.0 and Ver.3.0 can be inputted.

Information Priority Order of Sentence Information Priority Order of Sentence

Latitude,
Longitude

GGA>RMC>GLL Wind Direction MWV

Course VTG>RMC Wind Speed MWV

Haeding HDT Date ZDA>RMC

Ground Speed VTG>RMC Time ZDA>GGA

Water Speed VHW Water

Temperature

MTW

Output Data

The sentences of DBT, DPT, GGA, GLL, HDT,MTW, MWV,RMC, TLL, VHW, VTG and ZDA can be
transmitted.
The output is performed in the type of NMEA0183 Ver.2.0. However, the DBT is performed in Ver.1.5.

Sentence Information Sentence Information
DBT Depth MWV Wind Direction, Wind Speed
DPT Depth from the transducer RMC Latitude/Longitude, Course,

Ground Speed, Date
GGA Latitude/Longitude, Time TLL Target Position
GLL Latitude/Longitude VHW Water Speed
HDT Heading VTG Course, Ground Speed
MTW Water Temperature ZDA Date,Time

CVS-126 Chapter 6 Table Attached

0093132702-02 6-1

Chapter 6 Table Attached

6.1

6.16.1

6.1 Menu List

The factory set value is shown by the bold and underline.

Chapter 6 Table Attached CVS-126

6-2 0093132702-02

Inner-hull (-10～10:0)

,Homing

KODEN GPS

Other

HDT
MWV
RMC

GLL

All WPTs:DLT

All IMG DT:DLT

CVS-126 Chapter 6 Table Attached

0093132702-02 6-3

6.2

6.26.2

6.2 Specification

Item Content

Model CVS-126

Transmission
Frequency

50kHz/200kHz

Transmission
Method

Single or alternate

Transmission
Power

600W

Transmission
Firing Times

5000 times/minute at maximum

Transmission
Pulse Width

50µs to 30ms

Overall

Minimal
Reception Gain

0dBµV

Display 5.7 inch color TFT LCD QVGA

Display Mode Normal, Dual frequency, Zoom, NAV (homing mode, compass), A scope, Tide

Zoom Mode Bottom, bottom discrimination, zoom, bottom zoom, bottom follow zoom

Range 2.5 to 800m (It can be set at arbitrary 8 locations.)

Range Unit m, fm, l.fm, ft

Shift Amount 0 to 300m (Maximum depth 1200m using Shift)

Zoom Range 2.5m to 200m

Image Speed 10 stages (2/1, 1/1, stop, 1/1.5, 1/2, 1/2.5, 1/3, 1/3.5, 1/4, 1/4.5)

Function
Registration

Image speed, range method, shift, interference rejection, color rejection,
noise rejection, zoom range, zoom depth, white line, background color

Indicator

Color tone Monochrome, 8 color, 16 color, 64 color

Type NMEA0183 Ver.1.5/2.0/3.0 Input Data

GGA, GLL, MTW, MWV, RMC, VHW, VTG, ZDA

Type NMEA0183 Ver.2.0 (DBT only Ver.1.5)

Serial

Data

Output Data

DBT, DPT, GGA, GLL, MTW, RMC, TLL, VHW, VTG, ZDA

Power DC10.8—31.2V 10W

Range of
Operating
Temperature

-15°C to +55°C

Upper limit of
Store
Temperature

+70°C

Upper limit of
humidity

93% ± 3% (At +40°C)

Waterproof IPX5

Vibration
Resistant

When the following vibration is applied to equipment respectively under
specified condition, its performance should not be affected.

• From 2 - 5Hz up to 13.2Hz vibration width ±1mm ±% (Maximum
acceleration 7m/s2 constant at 13.2Hz)

• From 13.2Hz up to 60Hz Maximum acceleration 7m/s2 constant

Size of Cabinet Maximum 182x208x130 (Unit 182x182x85)

Environment Condition

Weight 1.3kg

Chapter 6 Table Attached CVS-126

6-4 0093132702-02

6.3

6.36.3

6.3 Appearance

CVS-126 Chapter 6 Table Attached

0093132702-02 6-5