Si-tex CVS-126 User's Manual

CVS-126

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

1 0093132702-01 25/05/2008

2

3

4

5

6

7

8

9

10

Revision criteria for document number/version number

First edition

Chapter all

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.

0093132702-01 i

Important Notice CVS-126

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.

ii 0093132702-01

CVS-126 For Your Safe Operation

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.

0093132702-01 iii

For Your Safe Operation CVS-126

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 protection 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.

iv 0093132702-01

CVS-126 Contents

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 protection

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

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

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

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

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

0093132702-01 v

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

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

Contents CVS-126

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

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

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 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 ...............3-2

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

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

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

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

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................................ 5-10

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

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

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

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

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

Display the water temp graph. /

Stop the display of water temp

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

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

vi 0093132702-01

CVS-126 Introduction

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 boat 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.

0093132702-01 vii

System Configuration CVS-126

GPS sensor

TD: transducer

External water temperature meter

/ speed sensor

System Configuration

Connection Diagram

CVS-126 Display unit

GPS-20A

External Navigation Equipment

* (Inner-hull, through-hull)

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

Water temperature sensor

External speaker

(For speaker with amplifier)

(Prepared by a user)

viii 0093132702-01

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 System Configuration

DC10.8~31.2V

Connection to the water temperature sensor

hull

sensor

Transducer

To POWER connector

connector

CVS-126 echo sounder unit
With mounting bracket and protection cover

Legend

Standard configuration

To

CW264-2M

External power output (For GPS etc)

Option

External speaker (For speaker with amplifier)

(Prepared by a user)

NMEA circuit input output
GPS sensor (GPS-20A)
External navigation equipment,
external water temperature meter

Red

Black

-

Option cable (CW-840-0.3M)

Connection to the Transducer

Connection to the speed sensor

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

Water temperature

/ speed sensor

ST/80/90/100

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

0093132702-01 ix

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

Configuration of Equipment CVS-126

Configuration of Equipment

Standard Equipment Configuration List

No

1 Transmission-receiver

2 Protection cover

3 DC power cable

Name of item Type Remark Weight/

display unit

(Complex cable)

Quantity

Length

CVS-126 600W output

with mounting bracket
and knob

C38MB12020 150g 1

CW-264-2M With 12 connector at

one end/ un-treated at
the other end

1.3 kg

2m 1

1

4 Fuse

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

6 Cap

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

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

F-7161-2A
Cylinder (ø6.3x32)

LTWCAP-DABCFXC1 For transducer cable

Normal fusion type for
main power

Display unit

connector

2

4

1

x 0093132702-01

CVS-126 Configuration of Equipment

Essential Option

No

1 Transducer Type of transducer transducer cable (with

Name of item Type Remark Weight/

Length

9m 1

connector at one end)

Quantity

Type of transducer

No

1 TD-500T-2B

2 TD-500T-3B

Specification Frequency Material Mounting method

Option List

No

1 Water temperature

Name of Item Specification Remark Weight/Length

sensor / speed
sensor

50/200kHz Plastic Inner-hull

(The inner-hull kit is
needed.)

50/200kHz Bronze Through-hull

ST-80 For transom mounting

Plastic made (with cable)

ST-90 For through-hull mounting

Plastic made (with cable)

0.3kg/
8m

0.6kg/
8ｍ

ST-100 For through-hull mounting

Bronze made (with cable)

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

(With power & signal cable)

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

transducer TD-500T-2

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

optional water temperature
sensor / speed sensor.

0093132702-01 xi

1.2kg/
8ｍ

250g/10m

1.3kg

30cm

Chapter 1 Basic Operation CVS-126

Chapter 1 Basic Operation

1.1

1.1 How to use the key

1.11.1

CVS-126 Display unit

1
2

3

5
4

6

7

8

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】

2 【EVENT】

3 【Cursor】

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】

8 【BRILL 】/ Power

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

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

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

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

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

1-1 0093132702-01

CVS-126 Chapter 1 Basic Operation

How to remove the protection cover

While widening the claws at right and left sides of protection cover, draw the protection 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.

When :

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.

0093132702-01 1-2

Chapter 1 Basic Operation CVS-126

L H

1.2

1.2 Power On/Off

1.21.2

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.

Rainbow pattern
Time mark

Gain

School of fish

Range

Oscillation line

Fish

Depth

Type of Gain
H: High frequency gain,

Dual freq image

Function icon

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.

Language

English

日本語

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.

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 the power voltage drops below a certain level,
the icon blinks and the alarm beeps.

1-3 0093132702-01

CVS-126 Chapter 1 Basic Operation

Ultra-sonic

2

1.3

1.3 LCD Brilliance

1.31.3

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.

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.

Low frequency

(50 kHz)

1.4

1.4 Switch-over of Menu

1.41.4

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

1

Press the 【DISP】 key.

0093132702-01 1-4

Point A

Sea level

School of fish

High frequency

(200 kHz)

Your boat

Point B

signal

Chapter 1 Basic Operation CVS-126

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.

Low frequency image

High frequency image

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

Bottom It displays the position of

Bottom
Discrimination

Zoom It displays a zoom start

Bottom Zoom It displays the position of

Zoom start position

the bottom in the fixation
in the display bottom part.

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

position in the fixation at
the top of the display.

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

Zoomed range

It displays the bottom and
upper in the zoom.

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

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

Purpose

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

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

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

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

Bottom Follow
Zoom

1-5 0093132702-01

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.

CVS-126 Chapter 1 Basic Operation

Zoom image

(1) Bottom

Zoomed range

(2) Bottom Discrimination

The display width of zoom
is displayed in orange.

Normal image

30.0

Zoom image

The display width of zoom
is displayed in orange.

Normal image

(3) Zoom

Zoom start position

Zoomed range

Zoomed range

30.0

Zoom image

The display width of zoom
is displayed in orange.

Normal image

30.0

0093132702-01 1-6

Chapter 1 Basic Operation CVS-126

The display width of zoom
is displayed in orange.

(4) Bottom Zoom

Normal image

Zoomed range

(5) Bottom Follow Zoom

Zoomed range

30.0

Zoom image

The image below the bottom
is not zoomed.

The display width of zoom
is displayed in orange.

Normal image

30.0

Zoom image

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].)

R:M 12.6VH:9.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

Depth

高

Water temp

Range

Total range

R:M 12.6VH:9.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

70.0

70.0

1-7 0093132702-01

CVS-126 Chapter 1 Basic Operation

1.5

1.5 Switch-over of Range

1.51.5

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

Range

5.0

10.0

50.0

80.0

100.0

150.0
300
500

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

1.6 Gain Adjustment

1.61.6

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

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.

[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 range you desire to set.

0093132702-01 1-8

2

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