Raymarine DSM250 Owner's Handbook Manual

DSM250

Digital Sounder

Module

Owner’s

Handbook

Document number: 81211_1

Date: December 2002

DSM250 Digital Sounder Module iii

DSM250 Digital Sounder Module

Owner’s Handbook

December 2002

Intended Use

Raymarine DSM250 Digital Sounder Modules provide echo

sounder data that can be displayed on Raymarine PLUS Radar,

Chartplotter, or Fishfinder display units. DSM250 Digital

Sounder Modules are intended for recreational depth finding and

fishfinding purposes.

SAFETY NOTICES

This equipment must be installed and operated in accordance with

the instructions contained in this manual. Failure to do so can

result in personal injury and/or navigational inaccuracies. In par-

ticular:

HIGH VOLTAGE. The DSM250 contains high voltages. Adjust-

ments require specialized service procedures and tools only avail-

able to qualified service technicians – there are no user

serviceable parts or adjustments. The operator should never

remove the cover or attempt to service the equipment.

CAUTION:

Removing the transducer cable from the rear of the DSM250

while the sounder module is powered on can cause sparks. Only

remove the transducer cable after power has been removed from

the DSM250. As with any electronic device, be sure the sounder

module is mounted where it is well ventilated and free from

gasoline fumes.

If the transducer cable is accidentally removed while the DSM250

is powered on, remove power from the sounder module, replace

the transducer cable, and then return power to the module. As a

safety feature, the DSM250 only recognizes that the transducer is

connected at power-up.

iv DSM250 Digital Sounder Module

EMC Conformance

All Raymarine equipment and accessories are designed to the best

industry standards for use in the recreational marine environment.

The design and manufacture of Raymarine equipment and acces-

sories conform to the appropriate Electromagnetic Compatibility

(EMC) standards, but correct installation is required to ensure that

performance is not compromised.

Preface

This handbook describes the Raymarine DSM250 Digital

Sounder Module (200/50 kHz).

This device must be connected to an

hsb

2

PLUS Radar, Chartplot-

ter, or Fishfinder display unit to show echo sounder data. The

DSM250 will not work with older HSB (non-PLUS) displays.

Note: Older HSB (non-PLUS) display units must be upgraded to

hsb

2

before they can function with the DSM250.

Echo sounder systems require an appropriate Raymarine trans-

ducer unit and inter-connecting cable. Details for selecting and

installing the transducer are described in document number

81196, Transducers for Fishfinders Owner’s Handbook.

This handbook contains very important information on the instal-

lation and operation of your new equipment. In order to obtain the

best results in operation and performance, please read this hand-

book thoroughly.

Raymarine’s Technical Services representatives or your local

dealer will be available to answer any questions you may have.

Conventions

Raymarine echo sounding (sonar) devices with integrated dis-

plays are known as Fishfinders. In this document, the DSM250—

which does not have its own display—is alternatively called a

Digital Sounder Module, Sounder, or just Module. The DSM250’s

image data can be viewed on a display unit when that display is in

Sonar Mode.

DSM250 Digital Sounder Module v

Throughout this handbook, the dedicated (labelled) keys are

shown in bold capitals; for example, MENU. The soft key func-

tions, menu names and options are shown in normal capitals; for

example, SCREEN.

Operating procedures, which may consist of a single key-press or

a sequence of numbered steps, are indicated by a ➤ symbol in the

margin. When the procedure requires you to press a soft key, the

soft key icon is shown in the margin.

Technical Accuracy

The technical and graphical information contained in this hand-

book, to the best of our knowledge, was correct as it went to press.

However, the Raymarine policy of continuous improvement and

updating may change product specifications without prior notice.

As a result, unavoidable differences between the product and

handbook may occur from time to time, for which liability cannot

be accepted by Raymarine.

Warranty

To register your DSM250 Digital Sounder Module ownership,

please take a few minutes to fill out the warranty registration card

found at the end of this handbook. It is very important that you

complete the owner information and return the card to the factory

in order to receive full warranty benefits.

Raymarine Products and Services

Raymarine products are supported by a network of Authorized

Service Representatives. For information on Raymarine products

and services, contact either of the following:

United States Raymarine, Inc.

22 Cotton Road, Unit D

Nashua, NH 03063-4219

USA

Telephone:1-603-881-5200

1-800-539-5539

Fax: 1-603-864-4756

vi DSM250 Digital Sounder Module

Europe Raymarine Ltd

Anchorage Park

Portsmouth, Hampshire

England PO3 5TD

Telephone: +44 (0) 23 9269 3611

Fax: +44 (0) 23 9269 4642

Or, you may contact us on the World Wide Web at:

www.raymarine.com

This product contains technology provided under license by

Acorn Group plc. The copyright of this intellectual property is

acknowledged by Raymarine, Inc. as are Acorn’s trademarks and

patents. Acorn’s world wide web address is www.acorn.com.

Raymarine is a registered trademark of Raymarine Limited.

SeaTalk is a registered trademark of Raymarine Limited.

hsb

2

is a trademark of Raymarine Limited.

Pathfinder PLUS is a trademark of Raymarine Limited.

DSM250 Digital Sounder Module vii

Contents

SAFETY NOTICES ........................................................iii

EMC Conformance .......................................................... iv

Warranty ............................................................................ v

Raymarine Products and Services ..................................... v

Chapter 1: Overview .................................................................. 1-1

1.1 Introduction .......................................................... 1-1

How to Use This Handbook ...........................................1-2

What's New ....................................................................1-3

General ...........................................................................1-4

Sonar Mode Display Features ........................................1-5

1.2 Sonar Mode Display ............................................. 1-5

Operating Modes ...........................................................1-7

Sonar Options ................................................................1-8

Sounder Functions .........................................................1-9

Chapter 2: Installation .............................................................. 2-1

2.1 Introduction .......................................................... 2-1

Planning the Installation ................................................2-2

EMC Installation Guidelines .........................................2-2

2.2 Unpacking and Inspecting the Components ......... 2-4

2.3 Selecting the Equipment Location ........................ 2-4

Sounder Module Mounting Location ............................2-4

2.4 Cable Runs ............................................................ 2-5

2.5 Mounting the Sounder Module ............................. 2-8

2.6 System Connections ............................................. 2-9

DC Power Connection .................................................2-10

Ground Connection ......................................................2-11

hsb

2

Connection ............................................................2-12

Transducer Connection ................................................2-13

viii DSM250 Digital Sounder Module

EMC Conformance ......................................................2-15

Chapter 3: Getting Started ....................................................... 3-1

3.1 Introduction ...........................................................3-1

3.2 Powering on the Sounder Module .........................3-1

Status LED .....................................................................3-1

3.3 Updating Software on the Display Unit ................3-2

3.4 Selecting Repeater Mode ......................................3-2

3.5 Selecting Sonar Mode ...........................................3-3

3.6 Simulator Mode .....................................................3-5

Viewing Simulator Data .................................................3-6

Chapter 4: System Setup ........................................................... 4-1

4.1 Introduction ...........................................................4-1

4.2 Changing the Set Up Parameters ...........................4-1

4.3 System Set Up Parameters ....................................4-3

Data Boxes .....................................................................4-5

Bearing Mode .................................................................4-6

Cursor Reference ...........................................................4-6

Cursor Readout ..............................................................4-6

Day/Night ......................................................................4-6

Help ................................................................................4-7

Soft Keys ........................................................................4-7

Key Beep ........................................................................4-7

MOB Data ......................................................................4-7

Autopilot Pop Up ...........................................................4-7

Menu Timeout Period ....................................................4-7

Units ...............................................................................4-8

Variation Source .............................................................4-8

Bridge NMEA Heading .................................................4-9

NMEA-Out Set Up ........................................................4-9

Cursor Echo .................................................................4-11

DSM250 Digital Sounder Module ix

Date and Time Settings ................................................4-11

GPS SOG/COG Filter ..................................................4-12

Compass Set Up ...........................................................4-12

Language ......................................................................4-12

Simulator ......................................................................4-12

4.4 Sonar Set Up Parameters ..................................... 4-13

Target Depth ID ............................................................4-14

Color Bar ......................................................................4-14

Depth Digit Size ...........................................................4-14

Sonar HSB Mode .........................................................4-14

Depth Offset .................................................................4-15

Speed Calibrate ............................................................4-16

Temperature Calibrate .................................................4-16

Sonar History ...............................................................4-16

Sonar Interference Rejection .......................................4-16

Sonar Simulator ...........................................................4-17

Version/Serial Numbers ...............................................4-17

Chapter 5: Basic Display Controls ............................................ 5-1

5.1 Introduction .......................................................... 5-1

Simulator ........................................................................5-1

5.2 Setting Color and Brightness ................................ 5-1

Lighting and Contrast (Monochrome Displays) ............5-1

Brightness and Color Settings (Color Displays) ............5-2

5.3 Controlling the Display ......................................... 5-5

Selecting the Display Mode ...........................................5-6

Switching Between Sounder and Other Modes ...........5-12

5.4 Display Control Functions .................................. 5-13

Viewing Data Boxes ....................................................5-14

Changing the Scroll Speed ...........................................5-14

Selecting the Power Setting .........................................5-15

Changing the Sounder Range ......................................5-16

Selecting the Frequency ...............................................5-19

Using Bottom Lock ......................................................5-20

Using A-Scope .............................................................5-22

x DSM250 Digital Sounder Module

Using Zoom .................................................................5-24

Chapter 6: Sonar Mode Operation ........................................... 6-1

6.1 Introduction ...........................................................6-1

6.2 Interpreting and Adjusting the Sounder Image .....6-1

Fish Indications ..............................................................6-2

Bottom Indications .........................................................6-3

Using White Line ...........................................................6-5

Adjusting Display Gain (Sensitivity) .............................6-5

Using Alarms .................................................................6-8

6.3 Using VRM to Determine Depth & Distance from

Vessel ...................................................................6-10

6.4 Waypoints ............................................................6-12

Placing a Waypoint ......................................................6-13

6.5 MOB ....................................................................6-14

Chapter 7: Maintenance and Problem Solving ...................... 7-1

7.1 Maintenance ..........................................................7-1

Routine Checks ..............................................................7-1

Cleaning Instructions .....................................................7-1

EMC Servicing and Safety Guidelines ..........................7-2

7.2 Resetting the System .............................................7-3

7.3 Problem Solving ....................................................7-4

Status LED .....................................................................7-6

How to Contact Raymarine ............................................7-7

Worldwide Support ......................................................7-10

Appendix: Specifications ........................................................A-1

Chapter 1: Overview 1-1

Chapter 1: Overview

1.1 Introduction

This handbook describes the DSM250 Digital Sounder Module.

The DSM250 receives sonar signals from a transducer mounted in

the water and transmits data via

hsb

2

to a Pathfinder PLUS Radar

or Chartplotter display unit already installed in your vessel, elimi-

nating the need for a separate display unit. You may also connect

the module to an existing PLUS Fishfinder display for improved

performance.

Note: Older HSB (non-PLUS) display units must be upgraded to

hsb

2

before they can function with the DSM250.

Figure 1-1: DSM250 Digital Sounder Module

The DSM250 employs a very high transmission repetition or

“ping” rate which, along with the digital adaptive high sample

rate receiver, ensures that fish and bottom structure are presented

in superb detail and optimal color allocation (in color LCD dis-

plays). The DSM250 digital bandwidth adaptation adjusts the

receiver band width dynamically from very wide to very narrow,

as required by the actual water conditions. This provides superior

fish and bottom detection in conditions where other fishfinders

see very little or nothing at all.

D

6

1

5

9

-1

1-2 DSM250 Digital Sounder Module

The DSM250 features dual frequency (200 kHz and 50 kHz)

operation and—depending on the transducer installed and condi-

tions—up to 1000 watts RMS output power and performance

from 3 ft (1m) up to 5000 ft (1700 m).

This handbook describes DSM250 functions and how to use

hsb

2

PLUS Radar, Chartplotter, or Fishfinder display unit controls to

operate sonar operations. Controls that are specific to either

Radar, Chartplotter, or Fishfinder display unit functions are not

described in this document but can be found in the handbook for

that display.

Note: Many illustrations in this handbook show example screens.

The screen you see on your display depends on your system configu-

ration and set up options, so it may differ from the illustration.

How to Use This Handbook

If you are installing the DSM250 yourself, you should read

Chapter 2 before you start the installation.

For an overview of the display unit controls, read Chapter 5.

Chapter 3 will help you start using your system.

For detailed information on sounder module operations, refer to

Chapter 6.

To change the system set up default settings, read Chapter 4.

Chapter 1 gives an overview of the display unit controls and

sonar operation.

Chapter 2 provides planning considerations and detailed instruc-

tions for installing the DSM250 and connecting the unit to the dis-

play unit via

hsb

2

.

Chapter 3 provides instructions for setting up your system to suit

your preferences. You should read this chapter to determine how

to change the sonar system from the default settings.

Chapter 4 shows how to start using the display and viewing sonar

echo data.

Chapter 5 details operating the display unit’s controls in Sonar

mode.

Chapter 1: Overview 1-3

Chapters 6 provides detailed information for operating the sonar

functions - selecting depth range limits, adjusting gain, color and

STC, setting alarms, using the VRM marker, marks and man over-

board.

Chapter 7 provides information on user maintenance, and what

to do if you experience problems.

The Appendix lists the technical specifications for the DSM250.

What's New

The DSM250 operates much like traditional Raymarine fishfind-

ers. If you are already familiar with our displays, you won’t have

much difficulty using the DSM250. Below is a list of DSM250

features that differ from our traditional fishfinder displays.

• No integral display. You connect the DSM250 to an

hsb

2

PLUS

Radar, Chartplotter, or Fishfinder display unit to show echo

sounder data.

• Digital sonar. The DSM250 employs a digital dynamic adaptive

receiver and transmitter for dramatically improved fish and bot-

tom detection in any water conditions.

• New automatic Gain modes. These automatic modes make the

gain adjustments for you, based on depth and water conditions.

The DSM250 provides three pre-defined automatic gain settings

for Cruising, Trolling, and Fishing. See Adjusting Display Gain

(Sensitivity) on page 6-5.

• Bottom hunt feature. The DSM250 features a digital “Hunt

mode” that automatically searches for the bottom when the

sounder is in Auto Range. Unlike our fishfinder displays, the

DSM250 stays in manual range when placed there—it does not

switch to auto mode by itself. When you are trying to automati-

cally find bottom, you need to have the sounder module set to

Auto Range mode. Refer to Hunt Mode on page 5-18.

• Auto frequency. When set to Auto Frequency, the DSM250 also

alternates frequencies when hunting for bottom. If set for Manual

frequency, the unit does not switch frequencies when bottom

hunting. This differs from traditional Raymarine fishfinder dis-

plays. Details are found in Selecting the Frequency on page 5-19.

• New Auto STC mode. You can now let the sounder unit automat-

ically choose the optimal STC level for reducing background

noise that often appears in shallow water. See STC on page 6-8.

1-4 DSM250 Digital Sounder Module

• Transducer detection. For safety reasons, if the transducer is

disconnected and then reconnected while the sounder is powered

on, the DSM250 does not detect that the transducer has been re-

attached. In this case, you must power down the DSM250, recon-

nect the transducer cable, and then power the sounder module

back on before it operates properly.

• Status LED. The LED on the connector panel provides valuable

status information. The LED blinks green while the module is

operating normally. If the unit detects a problem, the LED blinks

amber to indicate a warning or red for an error. The number of

times the LED blinks is a code representing the nature of the prob-

lem. Refer to Status LED on page 7-6.

General

The DSM250 system, illustrated below, is comprised of the Dig-

ital Sounder Module, an

hsb

2

PLUS Radar, Chartplotter, or Fish-

finder display unit, transducer, and associated cables.

Figure 1-2: Basic Echosounder System using the DSM250

The DSM250 module is waterproof to CFR46 and can be installed

either above or below deck.

The unit includes connections to:

• power

• the transducer

• the display unit, via

hsb

2

• ground

hsb

2

PLUS Display Unit

D6160-1

Transducer

Digital Sounder Module

hsb

2

Chapter 1: Overview 1-5

Transducer

The DSM250 requires a transducer, mounted either thru-hull, in-

hull, or on the transom.

Transducers can measure water depth, and if so equipped, temper-

ature, distance traveled, and/or speed. It is important to position

your transducer correctly. For details on transducers, including

location and installation instructions, see document number

81196, Transducers for Fishfinders Owner’s Handbook.

Note: If speed, temperature, or distance travelled are being input to

the display unit via SeaTalk, the SeaTalk value is displayed instead of

the value transmitted by the DSM250.

Sonar Mode Display Features

When connected to a display unit and switched to Sonar mode,

the following data can be viewed:

• Depth, speed, and temperature, if the transducer is so equipped

• Single or split frequency sonar display – 50 kHz, 200 kHz

• Display options – sonar window, zoom, bottom lock, and A-

Scope

• Horizontal and vertical half-screen windows to display additional

data. Position data requires GPS.

1.2 Sonar Mode Display

When you first switch the display unit into Sonar mode, the

scrolling bottom graph is displayed. This is a graphical represen-

tation of the echoes seen by the DSM250. As time passes, this dis-

play scrolls from right to left and becomes a record of the echoes

seen. A typical display is shown in Figure 1-3 .

The images at the right hand side of the display are the most

recent echoes. Some echoes indicate fish, and others show the

bottom. It can also indicate bottom structures, such as a reef or

shipwreck. The upper and lower depth range limits are shown.

The sonar screen includes a status bar that displays transducer fre-

quency and indicates which auto settings are enabled (Gain, Color

Gain, Range, Zoom and Frequency), and alarm status (fish and

shallow/deep water depths).

1-6 DSM250 Digital Sounder Module

You can customize the sounder by choosing what is displayed and

how it is displayed (including language and units). For example,

you can set the scroll speed of the bottom graph display, and you

can select the range to adjust the depth displayed.

You can view the cursor position and a variety of data (such as

speed and depth) from the transducer and other equipment in user-

selectable data boxes. These data boxes can be moved around the

screen and they can be switched on or off.

Chapter 3 includes details on adjusting the display, other set up

options are described in Section 4.4.

Figure 1-3: Typical Display in Sonar Mode

D6181-1

ZOOMFREQUENCY

BTM.LOCK A-SCOPE

AUTO GCRZFH

50kHz

0

SD

60

20

40

18

22

38

35

36

33

32

36

37

42

ft

Gain

Color gain

Range

Cursor,

controlled

by trackpad

Auto

Mode

Indicators

Water surface

Frequency

Target Depth ID On

Alarm enabled

Frequency

Power

Zoom

Shallow, Deep

Alarm

Indicators

Fish

Depth markers

Target image (fish arch)

Range

Bottom depth

Target image depth

Chapter 1: Overview 1-7

Operating Modes

Depending on the types of display(s) you have connected via

hsb

2

,

up to four full-screen modes – sonar, chart, radar, and data log are

available. You select the operating mode using the DISPLAY key

as described in Chapter 3.

You can also set Windows On to split the display into two half-

screen windows (horizontal or vertical) to show supplementary

data, or to display sonar and chart or radar simultaneously.

Horizontal Half -Screen Window Options

Using horizontal half screens, the main operating mode is dis-

played in the upper window; you choose what is displayed in the

lower window. The following information, if available on your

system, can be shown:

Vertical Half -Screen Window Options

This option splits the sounder vertically. The left hand window dis-

plays data boxes; there are three different sets of data (A, B, and C)

that you can select for display. The following information is avail-

able only in Sonar Mode:

Table 1-1: Horizontal Half-Screen Window Options

Full-screen

mode Horizontal Half-Screen Window Options

Sonar Mode Course Deviation Indicator (CDI), Bearing and Distance

Indicator (BDI), Depth/Temp graph, Chart plotter, Radar

Chart Mode CDI, BDI, Navigation Data (databoxes), Radar, Sonar

Radar Mode CDI, BDI, Navigation Data, Chartplotter, Sonar

Data Log Mode Half-screens not available

Table 1-2: Vertical Half-Screen Window Options

Full-screen

mode

Vertical Half-Screen Window Options

A Temperature, Speed, Depth

B Position (latitude and longitude), Course Over Ground

(COG), Speed Over Ground (SOG), Depth

C Waypoint Range and Bearing, COG, SOG, Depth

1-8 DSM250 Digital Sounder Module

Note: Receiving and displaying position data requires that a GPS is

connected to your Raymarine system.

Figure 1-4: Half-Screen Windows in Sonar Mode

Details on selecting windows are given in Chapter 3.

For details on the radar, chartplotter or fishfinder display, please

refer to the Owner’s Handbook supplied with that unit.

Sonar Options

The DSM250 provides controls to select additional modes:

• Frequency – you can select the transducer frequency: 50 kHz for

wide coverage and deep water, 200 kHz for a detailed view, both

frequencies simultaneously or auto-frequency. The default set-

ting is auto-frequency, which determines the optimum frequency

of operation based on the current depth.

• Bottom Lock – changes the operating mode to re-set the bottom.

It provides a bottom-up view: the bottom is used as the reference,

its image is flattened and depths are displayed here.

Bottom lock mode is used primarily to filter out the bottom struc-

ture and display fish details only.

• A-Scope – displays a real-time image of the bottom structure and

fish directly below the transducer. The A-Scope window also dis-

plays the patented Bottom Coverage width indication.

ZOOMFREQUENCY

BTM.LOCK A-SCOPE

AUTO GCRZFH

50kHz

0

60

STEER PORT

WAYPOINT 001

XTE

WPT BRG

WPT RNG

TTG

0.28nm

26.8nm

03

h:59m

351°T

20

40

ZOOMFREQUENCY

BTM.LOCK A-SCOPE

AUTO GC FH

50kHz

0

DEPTH

ft

SPEED

kts

20.1

15.1

10.1

F

30 0MINUTES

20

40

TEMPERATURE

ft

60

Horizontal Half-Screen

D6206-1

Vertical Half-Screen

Chapter 1: Overview 1-9

• Zoom – enlarges all or part of the bottom graph display. You can

select x2, x4, or x6 magnification and the zoom area can be auto-

matically or manually adjusted.

You can select the Zoom or Bottom Lock image to be displayed in

place of the regular bottom graph display. Alternatively, you can

set the display window to be split vertically with the bottom graph

displayed in the right hand screen and the Zoom or Bottom Lock

image displayed in the left hand screen. See Figure 1-5 .

If you choose dual frequency, the scrolling bottom graph is dis-

played in both frequencies, split horizontally. Zoom, Bottom

Lock, or A-Scope can be displayed with the dual frequency graph.

All of these options are available when the sonar data is displayed

in a half-screen window.

Sounder Functions

The DSM250 includes the following functions:

• Automatic or manual selection of scroll speed for bottom graph

display

• Automatic or manual selection of transducer frequency

• Automatic or manual selection of depth range limits

• Automatic or manual selection of Gain, Color Gain, and STC set-

tings

• Set up alarms for Fish, Shallow water and Deep water

• VRM marker to determine depth and distance

Operation of these functions is described in Chapter 3 and

Chapter 6.

1-10 DSM250 Digital Sounder Module

Figure 1-5: Sonar Display Options

ZOOMFREQUENCY

BTM.LOCK A-SCOPE

AUTO GC Z H

0

80

200kHz

50kHz

200kHz

50kHz

200kHz

50kHz

SPLIT

0

ZOOMFREQUENCY

BTM.LOCK A-SCOPE

AUTO GC Z H

0

80 6.8

27.2

200kHz

50kHz

200kHz

50kHz

SPLIT

0

80

ZOOMFREQUENCY

BTM.LOCK A-SCOPE

AUTO GC Z H

200kHz

10

20

30

80

0

ZOOMFREQUENCY

BTM.LOCK A-SCOPE

AUTO GC Z H

SPLIT

D6202-1

0

X4

Split Frequency Split Frequency with A-Scope

Bottom Lock Split with Bottom Graph Zoom Split with Split Frequency

20

40

60

20

40

60

20

40

60

20

40

20

40

60

20

40

60

20

60

40

ft

80

60

ft

80

0

ft

0

55

75

55

BL

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Raymarine DSM250 Owner's Handbook Manual

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