DSM25
Digital Sounder
Module
Owner’s Handbook
Document number: 81254-2
Date: March 2006
Tr ademarks and registered trademarks
Raymarine is a registered trademark of Raymari ne plc.
All other product names are trademarks or registered trademarks of their
respective owners.
Contents of this handbook © Raymarine 2006.
3
Contents
Important Information .................................. .................................. .....................7
Intended Use ..................................................................................................7
Safety Notices ...............................................................................................7
EMC Conformance .................................................................................8
Product Disposal .............................................................................................9
Conventions ................................................................................................. 10
T echnical Accuracy ........................................................................................10
Warranty .......................................................................................................10
Chapter 1: Overview .................................. ..................................... ...................11
1.1 Introduction .................................. ......................................... ..............11
1.2 What the Sounder Displays ..................................................................12
1.3 How the Fishfinder Works ....................................................................13
Interpreting the Bottom Structure ......................................................13
How T argets are Displayed ...................................................................14
1.4 How to Use this Handbook ...................................................................15
Chapter 2: DSM25 Installation ........................ ..................................... .............17
2.1 Introduction .................................. ......................................... ..............17
Planning the Installation ......................................................................17
2.2 Unpacking and Inspecting the Components .........................................17
2.3 Optional Equipment .............................................................................18
2.4 Selecting Sounder Module Mounting Location ....................................18
2.5 Mounting the Sounder Module ........................................................19
2.6 Cable Runs ...........................................................................................21
2.7 System Connections .............................................................................22
Display Connection ..............................................................................22
T ransducer Connection ........................................................................22
Chapter 3: Using the Sounder Module .............................................................23
3.1 Introduction .................................. ......................................... ..............23
3.2 Selecting the Display Page ....................................................................24
Using the Course Deviation Indicator (CDI) ..................................27
Selecting a Split Window .............................................................27
3.3 Adjusting the Display ...........................................................................28
Range Shift ..................................................................................28
Soft Key Selections ...............................................................................29
3.4 Fishfinder Settings ..............................................................................29
Gain Modes .......................................................................................29
Auto Gain ....................................................................................30
Color Gain ......................................................................................30
TVG (Time V ariable Gain) ...............................................................30
Manually Adjusting the Gain Modes ..............................................30
4 DSM25 Owner’s Handbook
Operating Frequency ............................................................................31
Power Settings ......................................................................................32
3.5 Zoom ................................. ................... ...................... ................... ....... 33
Adjusting the zoom ........................................................................33
Adjusting the Position of the Zoomed Area ....................................34
3.6 Bottom Lock .........................................................................................34
3.7 A-Scope ............................. ................ ................ ................... ................36
3.8 Presentation ............................... ....................... ......................... .......... 37
White Line and Bottom Fill ....................................................................37
White Line ......................................................................................37
Bottom Fill ......................................................................................37
White Line and Bottom Fill together ............................................... 38
Scroll Speed and Pause .........................................................................38
SCROLL AUTO/MAN .....................................................................38
SCROLL PA USE/RESUME .............................................................39
3.9 Determining Target Depths and Distance ...........................................39
3.10 Using Waypoints ..................................................................................40
Chapter 4: Fishfinder Setup ......................................................... .....................41
4.1 DSM Setup ............................................................................................43
Depth Digit Size ..................................................................................43
Depth Lines ........................................................................................43
Palette ................................... ................................ ............................. 43
Depth Offset .......................................................................................44
Speed Calibrate ..................................................................................44
T emp Calibrate ...................................................................................44
DSM Reset ..........................................................................................44
T rip Reset ............................................................................................44
Interference Rejection (Int Rej) ...........................................................45
Second Echo Rejection .......................................................................45
Max. Ping Rate ...................................................................................45
Ping Enable ........................................................................................45
4.2 Fishfinder Alarms ................................................................................46
T arget Depth ID ..................................................................................46
Fish Alarm ..........................................................................................47
Fish Sensitivity ....................................................................................47
Shallow Alarm ....................................................................................47
Shallow Range ...................................................................................47
Deep Alarm ........................................................................................47
Deep Range ........................................................................................47
T emp. Alarm .......................................................................................47
T emp. Range High ..............................................................................48
T emp. Range Low ...............................................................................48
5
Chapter 5: Maintenance and Problem Solving ...............................................49
5.1 Maintenance ........................................................................................49
Routine Checks ....................................................................................49
Cleaning Instructions ...........................................................................49
EMC Servicing and Safety Guidelines ...................................................50
5.2 Resetting the Sounder ..........................................................................51
Power -on Reset ....................................................................................51
Factory Reset ........................................................................................51
5.3 Problem Solving ...................................................................................52
Common Problems and Their Solutions ................................................52
Status LED ............................................................................................53
5.4 How to Contact Raymarine ..................................................................54
On the Internet .....................................................................................54
In the US ...............................................................................................55
In Europe ..............................................................................................56
Worldwide Support ..............................................................................56
Appendix: Specifications............................................ ............................... ....... 57
General ............................ ................................................ ....................57
Sounder Features .................................................................................57
Index ........................... ................................................................... ................... 59
6 DSM25 Owner’s Handbook
Important Information
Intended Use
Raymarine DSM25 Digital Sounder Modules provide echo sounder data that can
be displayed on A65 Multifunction Display units. DSM25s are intended for
recreational depth finding and fish find ing purposes.
Echo sounder systems require an appropriate Raymarine transducer unit and
inter-connecting ca ble. Depending o n the type of transducer connected, the
DSM25 can also display temperature , distance traveled, and/or speed.
This manual contains important information for installing and operating your
DSM25. T o get the best results in operation and performance, please take the time
to read this handbook thoroughly . Raymarine’ s Technical Servic es representatives
or your local dealer will be av ailable to answer any questions you m ay have.
For full details on system integration, please refer to the handbook supplied with
the A65 display .
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 particular:
7
WARNING: Electrical Safety
The DSM25 contains high voltages. Adjustments requir e
specialized service procedures and tools only available 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.
Make sure the power supply is switched off before making any
electrical connections.
WARNING: Transducer Cable
Removing the transducer cable from the rear of the sounder
module while it is switched on can cause sparks. Only remove the
transducer cable after power has been removed from the A65
display unit, which supplies power to the DSM. As with any
electronic device, be sure the sounder module is mounted wher e it
is well ventilated and free from gasoline fumes .
8 DSM25 Owner’s Handbook
If the transducer cable is accidentally removed while the DSM25 is
powered on, remove pow er from the sounder module, replace the
transducer cable, and then return power to the module. As a
safety feature, the DSM25 only recognizes that the tr ansducer is
connected at power-up.
CAUTION:
The transducer transmits high frequency ener gy while in use. The
unit should be turned off when swimmers or divers are in close
proximity to the transducer . (There is a lack of scientifically sound
standards or guidelines for exposure levels and limits to
ultrasound. This notice is precautionary only .)
Ultrasonic Energy
EMC Conformance
All Raymarine equipment and accessories are designed to the best industry
standards for use in the recreational marine environment.
Their design and manufacture conforms to the appropriate Electromagnetic
Compatibility (EMC) standards, but correct installation is required to ensure that
performance is not compromised. Although every effort h as been taken to ensure
that they will perform under all conditions, it is important to understand what
factors could affect the operation of the product .
The guidelines given here describe the conditions for opti mum EMC performance,
but it is recognized that it may not be possible to meet all of these conditions in all
situations. T o ensure the best possible conditions for EMC performance within the
constraints imposed by any location, always ensure the maximum separation
possible between differen t items of electrical equi pment.
For optimum EMC performance, it is recommended that wherever possible:
• Raymarine equipment and cables connected to it are:
• At least 5 ft (1.5 m) from any equipment transmitting or cables carrying
radio signals, e.g., VHF radios , cables and an tennas. In the case o f SSB
radios, the distance should be increased to 7 ft (2 m).
• More than 7 ft (2 m) from the path of a radar beam. A radar beam can normally be assumed to spread 20 degrees above and below the radiating
element.
• The equipment is suppl ied from a separate battery from that used for engine
start. Voltage dr ops below 10 V and starter motor transients can cause the
equipment to reset.
This will not damage the equipment, but may cause the loss of some information and may change the operating mode.
Important Information 9
• Raymarine specified cables are used. Cutting and rejoining these cables can
compromise EMC performance and must be avoided unless doing so is
detailed in the installation manual.
Suppression Ferrites
If a suppression ferrite is attached to a cable, this ferrite should not be removed. If
the ferrite needs to be removed during installation it must be reassembled in the
same position. If a ferrite is packed separately in the carton, it must be installed as
soon as the cables are run.
The following illustration shows typical cable suppression ferrites sometimes
used with Raymarine equipment. T o ensure EMC compliance, always use these
ferrites, if supplied by Raymarine for use with this equipment. If not supplied by
Raymarine, a ferrite is not required for use with this equipment.
D3548-3
Connections to Other Equipment
If your Raymarine equipment is to be con nected to other equipment using a cable
not supplied by Raymarine, the suppression ferrite (if supplied) MUST always be
attached to the cable nearest the Raymarine unit.
Product Disposal
When you want to dispose of t his product at the end of its working life , please do
so in accordance with local regulations .
10 DSM25 Owner’s Handbook
Conventions
Throughout this handbook, the dedicated (labelled) keys are shown in bold
capitals (for example, ENTER). The soft k ey functions , menu names and options
are shown in normal capitals (for example, SCREEN).
Technical Accur acy
The technical and graph ical information contained in this ha ndbook, to the best
of our knowledge, was correct as it went to press . However , the Raymarine policy
of continuous improvement and updati ng may change product specificati ons
without prior notice . As a result, unavoidable dif ferences between the product
and handbook may occur from time to time .
For the latest version of this or any Raymarine document in PDF format, please
click the Owner’ Manuals link on the Customer Support page at
www.raymarine . c om
.
Warranty
T o register your DSM25 Digital Sounder Modul e ownership, pl ease take a few
minutes to fill out the warrant y registration card found at the end of this
handbook. It is very important that you complete the owner infor mation and
return the card to the factory in order to receive full warranty benefits.
Chapter 1: Overview
1.1 Introduction
This handbook describes how to install the DSM25 Digital Sounder Module and
operate it using the A65 display unit. The DSM25 emits and receives sonar signals
from a transducer mounted in the water , then interprets and transmits the data to
the A65 installed on the console.
D7737-1
11
The DSM25 employs a very high transmissi on 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. The
DSM25 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 all surroundings.
The DSM25 module is waterproof to IPX7 and can be installed either above or
below deck.
The unit includes connections to:
• power and data via the A65
• the transducer
The DSM25 requires a transducer, mounted either thru-hull, in-hull, on the
transom or on a trolling motor. T ransducers can measure water dept h, and if so
equipped, temperature, distance traveled, and/or speed. It is important to
position your transducer correctly .
12 DSM25 Owner’s Handbook
ft
200 kHz
20
0
40
60
43 9
1.2 What the Sounder Displays
When you first view the Fishfinder application on the A65, an image representing
the echoes received by the DSM is displayed. As time passes this image scrolls
from right to left and becomes a record of the data collected. The images at the
right hand side of the display are therefore the most recent.
The Fishfinder window will display:
• The bottom together wi th any bottom structure such as reefs and shipwrecks
• T arget images indicating fish
• The bottom depth
Y ou can customize the sounder to:
• Display or hide the depth of the targets
• Display or hide the depth lines
• Change the color palette
• Change the zoom level
• Pause the scrolling image
• Display White Line or Bottom Fill features
• Enable a fish, shallow or deep water alarm
Frequency
Bottom of
transducer
Target depth
Bottom depth
43
FISHFINDER
FISHFINDER
SETTINGS
SETTINGS
42
44
ZOOM
ZOOM
47
34
BOTTOM
BOTTOM
LOCK
LOCK
36
47
44
A-SCOPE
A-SCOPE
43
44
PRESENTATION
PRESENTATION
Depth
markers
Target
images
Bottom
Range
D7910-1
Chapter 1: Overview 13
1.3 How the Fishfinder Works
The F ishfinder application uses the DSM25 to process sonar signals from a
suitable transducer and provide a detailed underwater view .
The transducer located on t he bottom of the boat sends pulses of sound w aves
into the water and measures the time it tak es for the sound w ave to travel to the
bottom and back. T he returning sound echoes are affected by bottom structure
and by any other objects in their path, such as fish, wrecks, or reefs.
The sounder module processes these echoes and sends data to the A65 which
displays a visual interpretation of the underwater view . The strength of echoes is
indicated on the display by different colors. Y ou can use this information to
determine the bottom structure, the size of fish and other objects in the water .
Notes: (1)
Interpreting the Bottom Structure
The bottom usually prod uces a strong echo. T hese images indicate the bottom
conditions as follows:
A hard bottom (sand) produces a thin line
The DSM can operate at a frequency of 50 kHz or 200 kHz.
(2)
Some transducers will also enable the A65 to display water tem perature
and/or speed.
A soft bottom (mud or seaweed cover) produces a wide line. The dark
layer indicates a strong signal.
-
A rocky or uneven bottom or a wreck produces an irregular image with
peaks and troughs
D6855-1
14 DSM25 Owner’s Handbook
The dark layers indicate a good echo; the lighter areas weaker echoes. T his could
mean that the upper layer is soft and therefore allowing sound waves to pass to
the more solid layer below .
It is also possible that the sound waves are making two complete trips – hitting
the bottom, bouncing off the boat, then reflecting off the bottom again. This can
happen if the water is shallow, the bottom is hard, or gain is set high.
How Targets ar e Displayed
When a target is detected, it is displayed on screen as a mark. The shape and si ze
of this mark is influenced by a combination of factors:
Boat speed
The shape of the target changes along with your speed. Slower speeds return
flatter , more horizontal marks. As your bo at’s speed increases , the target will tend
to thicken and arch slightly until at fast speeds the mark resemb les a double
vertical line.
The depth of the target
The closer the target to the surface the larger the mark on screen.
Note:
The depth of individual targets can be displayed by switching on the Targ et Depth
ID in the Fishfinder Alarms Setup Menu.
The size of the target
The larger the target, the larger the retur n on the fishfinder display . T he size of a
fish target is however dependent upon the size of the fish’ s swim bladder rather
than its overall size. This swim bladder will vary in size between different breeds of
fish.
The frequency of the transducer
The same target will appear differently when the transducer frequency is
changed. The lower the frequency the broader the mark.
Chapter 1: Overview 15
Target
Depth ID
Target
Although weaker tha n the fish or bottom echoes , your fishfinder picture may be
impaired by echoes received from floating or su bmerged debris , air bubbles or
from your boat’s movements. This is known as background noise or clutter and is
controlled by the gain modes (gain, color gain and TVG). Raymarine recommends
that you enable your system to automatically control the ideal sensitivity level
based on depth and water conditions . Y ou can however adjust these settings
manually if you prefer .
1.4 How to Use this Handbook
This handbook describes how to install and operate a DSM25 with your A65
display unit.
Chapter 2 provides planning considerations and detailed instructions for
installing the DSM25 and connecting the sounder module to the display unit.
Chapter 3 shows how to operate the A65 display to view sonar echo data and
details operating the A65’s controls in F ishfinder mode.
Chapter 4 provides instructions for setting up your DSM25 to suit your
preferences.
Chapter 5 provides information on user maintenance and what to do if you
experience problems.
The Appendix lists abbreviations used in this handbook.
The following figure displays the DSM25 as part of the A65 system:
16 DSM25 Owner’s Handbook
Power Supply
D7746-1
RS12 GPS
DSM25
A65 Display
Transducer
Chapter 2: DSM25 Installation
2.1 Introduction
This chapter provides details for mounting the DSM25 and connecting to the A65
display.
For the system to display depth, water temperature and speed, you must install
the transducer type(s) capable of transmitting the approp riate data.
Planning the Installation
Before you install your system, plan the installation, considering:
• Correct transducer for your applic ation
• Location of the sounder module , as described in Sectio n 2.4
2.2 Unpacking and Inspecting the Components
Unpack your system carefully , to prevent damage to the equipment. Save the
carton and packing, in case you need to return the unit for service.
Check that you have all the correct system components:
17
Digital Sounder Module,
part no. E63070
Mounting Screws,
No.8 (x2)
DSM25
Owner's
Handbook
Owner’s Handbook,
part no. 81254
Power/Data Cable, 3.5m
part no. R69086
D7738-2
18 DSM25 Owner’s Handbook
2.3 Optional Equipment
If a longer connection is required from the DSM to the display, you can purchase
one of the following A65 Network Cables from Raymarine. Be sure to inst all the
suppression ferrites, if supplied.
Description Part No
A65 Network Cable, 8.5m E36015
A65 Network Cable 15m E36016
2.4 Selecting Sounder Module Mounting Location
The DSM25 is waterpr oof to IPX-7 is and is designed to be mounted either above
or below deck.
Mount the DSM25 where it i s:
• protected from physical damage and excessive vibration
• protected from prolonged exposure to rain, salt spray and direct sunlight
• well ventilated
• as close to the transducer as possible
Do not locate the DSM25:
• in the engine compartment
• on the main console
When planning the installation, the followi ng should be considered to ensure
reliable and trouble free operation:
•
Access: T here must be suff icient space below the unit to enab le cable con-
nections to the panel connectors, avoiding tight bends in the cable.
•
Interference: T he selected location should be far enough away from
devices that may cause interference, su ch as motors, generators , and radio
transmitter/receivers. (See “EMC Conformance“ on page 8.)
•
Magnetic compass: Mount the unit at least 3 ft (1 m) away from a magnetic
compass.
•
Cable runs: The unit must be located near the A65 display . The cable sup-
plied is 11.5 ft (3.5 m) in length. Longer network cables are available as
described in Section2.3.
•
Environment: Good ventilation is required to prevent the unit from over-
heating.
Chapter 2: DSM25 Installation 19
• Status LED: Mount the unit where you can view the status LED on the front
fascia. See page 53 for details.
Status LED
D8722-1
CAUTION: Do Not Remove T ransducer Cable when Power ed On
Removing the transducer cable from the DSM25 while power is
turned on can cause sparks. As with any electronic device, be sure
the sounder module is mounted where it is well ventilated and
free from gasoline fumes.
2.5 Mounting the Sounder Module
The DSM25 can be mounted either above or below deck using the supplied
hardware. T o allow for ease of cable connection, mount the sounder module so
that the cables hang below the unit.
The following figure displays dimensions for the DSM25.
T o mount the DSM25:
1. Hold the module in the location where you want to mount it, making sure it is
perpendicular to the deck.
2. Mark the location of the two key holes o nto the mounting surface .
Refer to the following figure.
20 DSM25 Owner’s Handbook
Vertical
x2
D7740-1
3. Drill a 9/64" (3mm) pilot hole at ea ch of t he mar ked locati ons .
Vertical
x2
D7741-1
Note:
For fiberglass with a gelcoat surface, you should overdrill the surface to prevent the
gelcoat from chipping when driving in the screw. Before dri lling the pilot hole, hand drill
the marked location with an oversized bit and countersink t o approximately 3/8" (9mm)
diameter.
4. Drive the supplied #8 screws into the pilot holes . Screw them in about half way .
Chapter 2: DSM25 Installation 21
5. Mount the module to the surface, slipping the screw heads through the two
key holes .
6. Press the module downw ard so the screws align with the narrow end of the
keyholes.
7. Tighten the screws until secure . Do not overtighten.
2.6 Cable Runs
Y ou will need to run the following cables:
•
Data/power cable, supplied with the DSM25. T his 11.5 ft (3.5 m) cable
connects the sounder to the A65 display unit. Longer cables are also available
(see “Optional Equipment” on page 18).
•
Transducer cable , supplied with the transducer . This 30 ft (10 m) cable has
a connector plug (with an outer nut that you must attach) at one end for the
sounder module or extension cable .
Consider the following before installing the cables:
• Cables should be adequately secured, protected from physical damage, and
protected from exposure to heat.
• Avoid running cables through bilges or doorways , or close to moving or hot
objects.
• Avoid sharp bends.
• Use a watertight feed-throug h wherever a cable passes through an exposed
bulkhead or deckhead.
1
6 mm
minimum
2
3
D7742-1
22 DSM25 Owner’s Handbook
• Secure cables in place using tie-wraps or lacing twine. Coil any extra cable
and tie it out of the way .
CAUTION: Do Not Cut or Splice the T ransducer Cable
• There is high voltage on the transducer cable. Splicing could
create a safety hazard.
• Cutting the transducer cable severely reduces sonar
performance. If the cable is cut, it must be replaced—it cannot
be repaired.
• Cutting the transducer cable will void the warranty and
invalidate the European CE mark.
2.7 System Connections
The connector panel pr ovides the following connection sock ets:
to A65
to transducer
D7743-1
Display Connection
The 8-pin connector label led DISPLA Y provides a connection for both power and
data to the A65 display .
There is no power switch on the DSM25. T he unit turns on when the network
cable is attached to an A65 display and the A65 is energized.
T ransducer Connection
A 30 ft (10m) cable is supplied with the transducer .
Chapter 3: Using the Sounder Module
3.1 Introduction
The standard fishf inder image is an historical , scrolling bottom graph at an
automatically selected range and frequency. Various functions are provided to
improve the underwater view , select what is displayed and sound an alarm
including:
• Change the range (Range)
• Shift the selected viewing range (Range Shift)
• View a zoomed area (Zoom)
• Flatten the bottom image to help separate fish from t he bottom (Bottom
Lock)
• Show a “real time” image of fish and bottom structure directly below the
transducer (A-Scope)
• Change the size of the depth digit
• Isolate bottom fish using White Line and Bottom Fill
• Pause the scrolling image
• Set the frequency
• Manually adjust the sensitivity, color gain and time varied gain settings
• Use waypoints to mark positions
• Use fishfinder alarms (fish, depth or water temperature)
FISHFINDER
SETTINGS
ZOOM
BOTTOM
LOCK
A-SCOPE PRESENTATION
23
D7935-1
24 DSM25 Owner’s Handbook
200 kHz
46
8
ft
20
0
40
60
12
20
40
42
3.2 Selecting the Display Page
Before viewing fishfinder functions , you must select the fishfinder page on the
A65 display . Th e display provides you with different wind ow configurations for
presenting information.
T o change the display pages:
1. Press the PAGE key. T he associated soft keys are displayed:
FISHFINDERCHART
D7895-1
2. Press the FISHFINDER soft key . T he available fishfinder page layout co nfigurations are represented in the next set of soft keys:
FULL
SCREEN
CHART/
FISHFINDER
FISHFINDER/
NAV DATA
FISHFINDER/
TEMP GRAPH
3. Press the soft key for the page layout you want to view:
• Full Screen
Single window displaying sonar informatio n only
FISHFINDER/
CDI
D7934-1
FISHFINDER
FISHFINDER
SETTINGS
SETTINGS
ZOOM
ZOOM
BOTTOM
BOTTOM
LOCK
LOCK
A-SCOPE
A-SCOPE
PRESENTATION
PRESENTATION
D7937-1
Chapter 3: Using the Sounder Module 25
200 kHz
48 8
ft
20
0
40
60
50 kHz
20
0
40
60
• Chart/Fi shfinder P age
Split windows displaying sounder and chart information
12nm N-UP (RM)
Csr Pos N 26°42.618 W 078°31.961
ft
47
FISHFINDER
FISHFINDER
SETTINGS
SETTINGS
ZOOM
ZOOM
BOTTOM
BOTTOM
LOCK
LOCK
A-SCOPE
A-SCOPE
PRESENTATION
PRESENTATION
• Fishfinder/Navigation Data P age
Split windows displaying sounder and position data (via GPS), including current time, date, TTG , COG, range and bearing and depth information
WPT BRG
AM
SOG
14 0
TTG
00
WPT RNG
1.25
T
Date
06/07/2005
ft
PRESENTATION
PRESENTATION
h
FISHFINDER
FISHFINDER
SETTINGS
SETTINGS
ZOOM
ZOOM
Position
N 26°16 618
W 080°03 961
Waypoint NMEA
N 26°15:247
W 080°04:612
COG
152°T042°
Time
9:00:07
48 6
60
BOTTOM
BOTTOM
LOCK
LOCK
A-SCOPE
A-SCOPE
kts
:16
D7938-2
m
nm
D7939-1
26 DSM25 Owner’s Handbook
50 kHz
20
0
40
60
200 kHz
20
0
40
60
40 8
• Fishfinder/Temperature Graph P age
Split windows displaying sounder and a graph plotting water temp erature
readings from the transducer over the past 60 minutes
Temperature 71.5°
74
73
72
71
70
69
68
FISHFINDER
FISHFINDER
SETTINGS
SETTINGS
ZOOM
ZOOM
60 50 40 30 20 10 0
Speed
Log
Trip
48 6
60
BOTTOM
BOTTOM
LOCK
LOCK
4.6
kts
A-SCOPE
A-SCOPE
Minutes
nm
nm
N 26°16.618
W 080°04.961
9:35:08am
ft
PRESENTATION
PRESENTATION
• Fishfinder/Course Deviation Indicat or (CDI) P age
Split windows displaying sounder and a graphical representation of your
boat’s course in a ‘rolling road’ format
F
74
73
72
71
70
69
68
- +
13.5
71.5°F
28.6ft
V
D8703-1
FISHFINDER
FISHFINDER
SETTINGS
SETTINGS
ZOOM
ZOOM
>> STEER STARBOARD
WPT 0003
0.067
nm
WPT BRG
60
250
°T
BOTTOM
BOTTOM
LOCK
LOCK
A-SCOPE
A-SCOPE
220
WPT RNG
0.42
COG
°T
VMG (WPT)
nm
PRESENTATION
PRESENTATION
HEADING
225
3.1
kts
°T
D8704-1
Chapter 3: Using the Sounder Module 27
Using the Course Deviation Indicator (CDI)
With your display receiving accurate heading and position information, you can
use the CDI to monitor your course an d accurately steer to a target waypoint. The
CDI gives a graphical representation of yours boat’s course in a ‘rolling road’
format. As you travel towards the target waypoint, the check ered pattern and the
waypoint moves down the screen at a rate proportional to your boat’s speed.
The steering instructions below the rolling road tell you what correction is needed
to maintain your course and arrive at the target waypoint. Indication arrows are
placed either side of the steering instruction, pointing towards the center line. The
greater the error the more arrows appear. Y ou should correct your course by
steering in the direction indicated by the arrows.
CDI is described in greater detail in the A65 Handbook.
Selecting a Split Window
When the selected page has a split window, the window that is currently active is
bordered in red and the soft k ey options for that application are displayed.
Pressing the ACTIVE key changes this active highli ght to the other window on
that page and its associated soft ke y labels.
28 DSM25 Owner’s Handbook
3.3 Adjusting the Display
This section describes t he controls you can use to change how sounder d ata is
displayed on the A65 in Fishfinder mode.
Range
The DSM automatically adjusts the display to show the shallowest required range.
Alternatively, you can select to range in/out on the image (up to the maximum
depth displayed on the scrolling b ottom and A-Scope images).
RANGE
RANGE
AUTO MAN
SHIFT
0 ft
D8622-2
T o range in/out on an image:
1. Press the RANGE key . T he RANGE soft keys appear .
2. Press the down arrow on the RANGE key to increase displayed range (deeper)
and press the up arrow key to decrease it (shallower). The RANGE field
switches to MAN.
3. T o return to the automatic range adjustment, toggle the RANGE soft k ey to
AUTO.
The default range setting is AUT O . This settin g is reset at power -up.
Range Shift
The DSM automatically adjusts the display to k eep the bottom in the lower half of
the display window. Alternatively , you can shift the image within the current
range.
T o shift the image:
1. Press the RANGE k ey . Soft keys appear , with SHIFT grayed out.
2. T oggle the RANGE soft ke y to MAN. The SHIFT soft k ey is no longer grayed out.
3. Press SHIFT. This soft k ey is highlighted.
4. Use the rotary control to adjust the shift u p or down. The value of the shift is
displayed on the soft key .
5. T o return to the standard fishfinder image , toggle the RANGE soft key to
AUTO.
The default range shift setting is 0. T his setting is reset at power -up.
Chapter 3: Using the Sounder Module 29
Soft Key Selections
The soft k eys presented on the main fishfinder screen provide selections for the
most commonly used operations .
FISHFINDER
SETTINGS
ZOOM
BOTTOM
LOCK
A-SCOPE PRESENTATION
3.4 Fishfinder Settings
The system automatically adjusts the following settings to optimize the fishfinder
image:
GAIN
FREQUENCY
AUTO MAN
• Gain modes (Gain, Color Gain, TVG)
• Operating frequency
• Power setting
These settings should not ordinarily require adjustment. However , you can
however make adjustments manually if desired.
SELECTED FREQ
200 50 BOTH
POWER
AUTO MAN
D7935-2
D8222-2
Gain Modes
GAIN MODE
AUTO MAN
AUTO GAIN
LO MED HI
The fishfinder provides GAIN controls to reduce background noise and determine
how different strength echoes are shown. By def ault, the sounder automatically
adjusts the gain controls, based on depth and water conditions, and displays the
sharpest possible image.
Although you can also manually adjust these sett ings, Raymari ne recommends
that you retain the AUT O setting to achieve the best resu lts.
All of the GAIN settings are reset at power -on.
Note:
In addition to the controls described in this section, th e Fishfinder Setup menu options enable you to adjust the Interference Rejection, 2nd Echo Interference Rejection and
Ping Rate. These options are described on page 45.
COLOR GAIN
AUTO MAN
TVG
AUTO MAN
D8223-1
30 DSM25 Owner’s Handbook
Auto Gain
The GAIN, or sensitivity , of the display adjusts background noise by varying the
echo strength for display. The value of the GAIN control determines the strength
above which echoes are displayed. There are three AUT O GAIN modes:
• LO is ideal for viewing images with a minimum of background noise as you
are cruising to your fishing spot. Only the strongest echoes are displayed.
• MED is a slightly higher gain setting that displays more detailed echoes as you
are trolling. This is the default mode.
• HI gives the best details of the targets you have located but also displays the
most background noise and surface clutter. This is suitable when you ar e fishing.
With all of these modes, the DSM will automatically adjust the Gain setting for
current conditions and adjust separately for each frequency. Any adjustments
made apply to all windows using that frequency.
The default is HI.
Color Gain
Color gain determines how echoes of different strengths are displayed. As
conditions change the color gain a djusts accordingly .
The default is AUT O .
TVG (Time V ariable Gain)
The TVG (T ime Variable Gain) reduces the clutter by varying th e gain throughout
the water column. T his function is useful for reducing the appea rance of ‘noise’.
Increasing the TVG value increases the maximum depth to which TVG is applied.
Decreasing it reduces the maximum depth . TVG has no effect in fishfinder
Simulator Mode.
The default is AUT O .
Manually Adjusting the Gain Modes
If necessary you can set the gain controls manually . The new v alues remain set
even when you switch off the display an d are applied to both the active window
and any other fishfinder windows displaying that frequency .
1. Select FISHFINDER SETTINGS and then GAIN.
2. T oggle the required mode to MAN. T he adjustment slider is displayed above
the appropriate soft key .
Chapter 3: Using the Sounder Module 31
3. Use the rotary knob to adjust the value in the slider . T his value tak es immediate effect:
• GAIN MODE. This should be set high enough to see fish and bottom detail
but without too much background noise . Generally , a high g ain is used in
deep and/or clear water; a low gain in shallow and/or murky water.
• COLOR GAIN. T his sets the lower limit for the strongest echo color . All ech-
oes with a signal strength above this v alue are displayed i n the strongest
color . Those with a weaker value are divided equally between the remaining colors. Setting a low value produces a wide band for the weakest color ,
but a small signal band for the other colors. Setting a high value gives a
wide band for the strongest color , but a small signal band for the other
colors.
• TVG. A low TVG v alue has little effect on gain in shallow water. A high
value decreases the gain in shallow water so that only the strongest echoes are displayed.
4. Press CANCEL or ENTER twice to return to the default display.
Operating Frequency
The DSM provides four frequency modes:
•
AUTO mode . The system automatically selects the approp riate frequency
according to your depth. As the depth increases the DSM changes the frequency from 200 kHz to 50 kHz and as the depth decreases it switches from
50 kHz to 200 kHz. This mode is useful for automatically searching for the bottom. This is the default setting.
•
50 kHz only . The DSM25 scans a wide area and penetrates w ater well, so is
good for use in deep water.
•
200 kHz only . The DSM scans a narrower area, but produces a more detailed
view so is good for finding fish that are near the bottom or close together . It is
better for use in shallow water .
•
BOTH frequencies. T his setting displays separate screens for both 50 and
200kHz. The scrolling bottom display is split vertically; the left half shows the
200 kHz detailed view and the right half shows the 50 kHz image.
T o change the current frequency setting to AUTO mode:
1. Press FISHFINDER SETTINGS . A new set of soft keys appear.
2. Press FREQUENCY until AUT O is highlighted. The SELECTED FREQ soft k ey is
grayed out.
3. Press CANCEL or ENTER to return to the default display.
32 DSM25 Owner’s Handbook
T o change the frequency to a manual setting:
1. Press FISHFINDER SETTINGS . A new set of soft k eys appear .
2. Press FREQUENCY until MAN is hi ghlighted. The SELECTED FREQ soft k ey is
no longer grayed out.
3. T oggle the SELECTED FREQ k ey until the desired setting is highlighted:
• 200. The scrolling bottom is displayed using the selected frequency .
• 50. The scrolling bottom is displayed using the selected frequency.
• BOTH. Both frequencies are displayed simu ltaneously in split windows .
4. Press CANCEL or ENTER to return to the default display.
The default setting is A UTO .
Power Settings
The P OWER control provides adjustment of the transducer sign al. When AUT O is
selected (default), the DSM automatically determines the required power setting
based on the current dept h, speed, and (bottom) signal strength.
If, however , you wish to manually adjust the power to suit current conditions, you
can adjust the power level between 0 and 100%, in 1% increments. LOWER
power levels are normally used in depth ranges less than 8 ft. (2.4 m) and HIGHER
power levels are typically selected for depths greater than 12 ft. (3.7 m).
T o adjust the Power Sett ing:
1. Pre ss FISHFINDER SETTINGS .
2. Press POWER.
3. T oggle POWER to either AUTO or MAN. If MAN mode is set the power adjustment slider is displayed. Use the rotary knob to adjust the power value. There
is a short delay while the new setting takes effect.
4. Press CANCEL or ENTER to return to the default display.
The default setting is AUT O . This settings is reset at power -on.
Chapter 3: Using the Sounder Module 33
43.0
36.4
49.6
56.4
200 kHz
ft
Zoom x3
20
0
40
49 4
60
3.5 Zoom
.
ZOOM
ON SPLIT OFF
The DSM25 automatically k eeps the bottom image in the lower half of the
window. When you need to see more detail of the bottom structure or targets, you
can zoom in and enlarge a portion of the image . T his zoom range box can either
replace or appear alongside the standard sounder image.
The default setting is OFF.
ZOOM FACTOR
x2 x3 x4 xR
Zoom Range Box Standard Fishfinder Image
ZOOM RANGE
20ft
ZOOM POSITION
AUTO MAN
ZOOM START
20.0ft
D8219-2
ZOOM
ZOOM
SETTINGS
SETTINGS
ON SPLIT OFF
ON SPLIT OFF
ZOOM FACTOR
ZOOM FACTOR
x2 x3 x4 xR
x2 x3 x4 xR
ZOOM RANGE
BOTTOM
ZOOM RANGE
BOTTOM
LOCK
LOCK
10ft
10ft
ZOOM POSITION
ZOOM POSITION
AUTO MAN
AUTO MAN
ZOOM START
ZOOM START
PRESENTATION
PRESENTATION
36.2ft
36.2ft
Adjusting the zoom
1. Press ZOOM.
2. T oggle to:
• ZOOM ON to replace the standard fishfinder image with a zoomed image.
• ZOOM SPLIT to display both the standard fishfinder and a zoomed image.
3. T oggle ZOOM F ACT OR TO SELECT:
• X2, X3, or X4 for a predefined zoom level. The greater the factor , the
smaller the area you are viewing and therefore the smaller the zoom box.
Zoom
Box
D7913-1
34 DSM25 Owner’s Handbook
These factors are proportioned to the range . T herefore , as the range
increases, the area shown in the zoom window also increases .
—or—
• XR to adjust manually the ra nge shown in the Zoom window . When using
Ranged Zoom, the area shown in the zoom window does not change
when the range changes. Press ZOOM RANGE and use the rotary knob to
adjust the range as desired.
If you have chosen the split screen option, the zoomed section is indicated on
the standard fishfinder screen by a zoom box (see preceding illustration).
4. Press CANCEL or ENTER to return to th e standard fishfinder soft k eys.
Adjusting the Position of the Zoomed Area
1. T oggle ZOOM POSITION to:
• AUT O to automatically select the zoom position so that the bottom details
are always in the lower half of the display . This is the default.
• MAN and select ZOOM STAR T. Y ou can now use the rotary knob to select
the portion of the image to be zoomed.
2. Press CANCEL or ENTER to return to the default display.
Note:
Selecting Zoom automatically switches OFF Bottom Lock and A-Scope image s.
3.6 Bottom Lock
BOTTOM LOCK
ON SPLIT OFF
B-LOCK RANGE
20ft
When you are looking for fish that feed close to the bottom, yo u can use the
Bottom Lock function to filter out and flatten the bottom structure and display the
fish (or any other objects directly above the bottom) more clearly .
The scrolling bottom display provides a top-down view, referenced from the
surface of the water . With Bottom Lock, range in tervals are measured up from the
bottom (rather than down from the surface). T hus, t he bottom is shown as zero
and the top number indicates the maximum dist ance above the bottom being
displayed.
Bottom Lock can either replace or appear alongside the standard image.
The default setting is OFF.
BOTTOM SHIFT
10%
D8217-2
Chapter 3: Using the Sounder Module 35
ft
Btm Lock
20
0
40
49 8
10
20
0
60
200 kHz
30
BOTTOM LOCK
BOTTOM LOCK
ON SPLIT OFF
ON SPLIT OFF
Note:
B-LOCK RANGE
B-LOCK RANGE
30ft
30ft
If the A-Scope or Zoom image was displayed, selecting Bottom Lock automatic ally
BOTTOM SHIFT
BOTTOM SHIFT
20%
20%
D8218-1
switches OFF A-Scope and Zoom.
T o display or remove the Bottom Lock image:
1. Press BO TTOM LOCK. T he Bottom Lock soft keys are displayed.
2. T oggle to:
• BOTT OM LOCK ON to replace the standa rd fishfinder image with the bottom lock image.
• BOTT OM LOCK SPLIT to display both th e standard fishfinder an d bottom
lock image in a single windo w .
• BOTT OM LOCK OFF to return to the standard fishf inder image.
3. T o adjust the range of the Bottom Lock image, press B- LOCK RANGE and then
use the rotary knob to adjust the range.
4. T o re-position the Bottom Lock image to view more bottom details, press BO TTOM SHIFT and then use th e rotary knob to adjust the shift between the bottom of the window (0%) and the middle of the window (50%).
5. Press CANCEL or ENTER to return to the default display.
36 DSM25 Owner’s Handbook
ft
43 9
200 kHz
20
0
40
60
14.2 14.2 14.2
3.7 A-Scope
A-SCOPE
ON OFF
A-SCOPE MODE
1 2 3
Use the A-Scope screen to show raw sonar data directly from the transducer
beam. This gives you a “real time” image of fish and bottom s tructure directly
below the transducer . T his function is very useful in showing the st rength of the
echo returned from a fish. The display is split vertically, with the A-Scope image in
the right hand window and the scrolling bottom image in the left hand window .
Select one of the three modes for A-Scope:
• MODE 1, in which the image takes up the entire A-Scope window.
• MODE 2, in which only the left side of the image displayed in MODE 1 expands
to the entire A-Scope window. This mode provides the greatest resolution.
• MODE 3, in which the A-Scope image is angled outward as the signal wi dth
(indicated with dotted lines) increases with depth.
The default setting is OFF.
A-Scope MODE 1 MODE 2 MODE 3
D8329-2
A-SCOPE
A-SCOPE
ON OFF
ON OFF
34
36
42
43
44
47
A-SCOPE MODE
A-SCOPE MODE
1 2 3
1 2 3
Note:
If the Bottom Lock or Zoom image was displayed, selecting A-Scope automaticall y
47
switches OFF Bottom Lock and Zoom.
44
43
44
D7912-1
Chapter 3: Using the Sounder Module 37
ft
200 kHz
20
0
40
60
31 9
3.8 Presentation
Y ou can further adjust the fishfinder image using features accessed via the
PRESENTA TION soft keys:
VRM...
WHITE LINE
ON OFF
White Line and Bottom Fill
These two related features help better define images near the bottom.
White Line
Bottom
Fill
BOTTOM FILL
ON OFF
SCROLL
AUTO MAN
SCROLL
PAUSE RESUME
D8220-2
White Line
When this feature is applied, a white lIne is drawn along the bottom (as defined
by the digital depth value) and the detail below the bottom removed. Fish near the
bottom can now be seen more easily .
Bottom Fill
When this feature is applied, the detail below the bottom is stretched downward.
The bottom is now clearly defined and the fish near the bottom can be seen more
easily.
VRM
VRM
WHITE LINE
WHITE LINE
ON OFF
ON OFF
BOTTOM FILL
BOTTOM FILL
ON OFF
ON OFF
SCROLL
SCROLL
AUTO MAN
AUTO MAN
PAUSE RESUME
PAUSE RESUME
SCROLL
SCROLL
D8508-2
38 DSM25 Owner’s Handbook
White Line and Bottom Fill together
When both White Line and Bottom F ill are applied, the bottom is defined by a
white line and the detail below it replaced by a single contrasting color . Both the
bottom and fish near the bottom are now clearly defined.
T o display/hide White Line and/or Bottom F ill:
1. Pre ss PRESENT ATION .
2. Press WHITE LINE or BOTTOM FILL to toggle the feature OFF or ON as desired.
3. Press CANCEL or ENTER to return to the default display.
Scroll Speed and Pause
Y ou can adjust the speed at which the display scrolls or pause it all together using
the Scroll functions. Scroll is comp rised of two separate soft keys: A UTO/MAN and
PAUSE/RESUME.
SCROLL AUTO/MAN
This soft key controls scroll speed. A faster speed displays more detail, which is
useful when you are looking for fish. If you select a slower speed, the information
remains on the display for a longer time . The same section of the bottom is
displayed regardless of scrolling speed.
The following options are av ailable:
Manual Scroll
Selecting SCROLL MAN enables you to set the scroll speed as a percentage of the
maximum scroll rate for that depth, using the rotary knob . The lower the
percentage, the slower the image will scroll. The default is manual adjustment
with a full speed scroll (100%).
Automatic Scroll
When SCROLL AUT O is selected, the system automatically adjusts the scroll
speed, based on boat speed:
• Less than, or equal to 0.5 kts, scroll speed is constant at 10%
• Between 0.5–15 kts, scroll speed varies linearly with boat speed
• Greater than 15 kts, scroll speed is constant at 100%
Note:
If you have configured a transducer with no paddle wheel, selecting AUTO will re-
sult in full speed scrolling (100%).
Chapter 3: Using the Sounder Module 39
200 kHz
36
8
ft
20
0
40
60
12
30
32
SCROLL P AUSE/RESUME
Select SCROLL PA USE to pause the display to see a ‘snapshot’ of the image. T his
allows you to inspect the paused image an d place waypoints or VRMs . P AUSE
affects all fishfinder windows, in cluding split Frequency, Zoom and Bottom Lock
modes.
When SCROLL PAUSE is selected, the display stops scrolling but the depth
indication continues to be updated. T o resum e the scrolling bottom display ,
toggle to again select SCROLL RESUME.
3.9 Determining Tar get Depths and Distance
The fishfinder provides various features to determine depths and distances:
Depth line
Depth
Digit
FISHFINDER
FISHFINDER
SETTINGS
SETTINGS
• Depth Digit displays your current depth. The size of this digit can be
changed via the Fishfinder Setup menu. See
•
Depth Lines are horizontal dashed lines drawn at regular intervals to indi-
cate the depth from the surface . These are switc hed on/off via the Fi shfinder
Setup menu. See page 43.
•
Target Depth ID displays the depths of recognized targets. T hese are
switched on/off via the Fishfinder Alarms Setup menu, described on page 46.
ZOOM
ZOOM
BOTTOM
BOTTOM
LOCK
LOCK
Target
depth ID
A-SCOPE
A-SCOPE
Depth Digit Size
PRESENTATION
PRESENTATION
on
page 43
D8621-2
Depth
markers
.
40 DSM25 Owner’s Handbook
200 kHz
20
0
40
60
43 9
ft
3.10 Using Waypoints
Marking a position enables you to return to that spot at a later date. A position is
marked on the screen with a w aypoint. When a waypoint is placed, its details are
added to the Waypoint List and a vertical line labell ed WPT (see illustration
below) is displayed on screen.
WPT
WPT
WPT
WPT
WPT
WPT
34
36
WPT
43
42
44
47
WPT
WPT
47
WPT
44
43
44
FISHFINDER
FISHFINDER
SETTINGS
SETTINGS
ZOOM
ZOOM
BOTTOM
BOTTOM
LOCK
LOCK
A-SCOPE
A-SCOPE
PRESENTATION
PRESENTATION
T o place a waypoint:
... at your current position
1. Press WPTS/MOB. The waypoint soft k eys are displayed.
2. Press WAYPOINT A T VESSEL . The Edit W aypoints box is displayed.
3. Press ENTER twice to save the waypoint with the standard settings.
... at the cursor
1. So that it is easier to position the cursor over the desired site, press PRESENTATION and then toggle the SCROLL option to P AUSE.
2. Maneuver the cursor to the s pot on the screen you woul d like to ma rk.
3. Press WPTS/MOB. The waypoint soft k eys are displayed.
4. Press WA YPOI NT AT CURSOR. T he Edit W aypoint box is displayed.
5. Press ENTER twice to save the waypoint with the standard settings.
For greater details of how to place a w aypoint, please refer to the Waypoints
chapter of the A65 User’s Handbook.
D8224-1
Chapter 4: Fishfinder Setup
Fishfinder Setup functions can be accessed using the controls that are displayed
when you press the MENU k ey on the A65 display .
Note:
All settings described in this chapter—except Max. Ping Rate and Ping Enable—
are retained when the unit is powered off.
T o access Fishfinder Setup:
1. Press MENU. The main Setup menu is displayed.
Setup
Setup
Chart Setup...
Fishfinder Setup...
System Setup...
Alarms Setup...
GPS Setup...
Display Setup...
Diagnostics Menu...
User Card Menu...
41
D7901-2
2. Use the trackpad or the rotary knob to highlight F ishfinder Setup .
ENTER
OR
Chart Setup...
Fishfinder Setup...
System Setup...
Alarms Setup...
GPS Setup...
Compass Setup...
Display Setup...
Diagnostics Menu...
User Card Menu...
Setup
Setup
D7902-2
3. Press the trackpad (right) to select this item. T he menu changes to show you
the available optio ns.
42 DSM25 Owner’s Handbook
Fishfinder Setup
Fishfinder Setup
ENTER
Depth Digit Size
Depth Lines
Palette
LARGE
OFF
CLASSIC/BLUE
Depth Offset
Speed Calibrate
Temp Calibrate
0.0 ft
100%
0.0 F
DSM Reset...
Trip Reset...
Fishfinder Int Rej
Second Echo Rej.
Max. Ping Rate
Ping Enable
LOW
OFF
26 Pings/Sec.
ENABLED
D7903-3
4. Press the trackpad or rotate the knob to highlight the desired operation.
ENTER
Depth Digit Size
Depth Lines
Palette
OR
Depth Offset
Speed Calibrate
Temp Calibrate
DSM Reset...
Trip Reset...
Fishfinder Int Rej
Second Echo Rej.
Max. Ping Rate
Ping Enable
Fishfinder Setup
Fishfinder Setup
LARGE
OFF
CLASSIC/BLUE
0.0 ft
100%
0.0 F
LOW
OFF
26 Pings/Sec.
ENABLED
D7904-3
5. Press the trackpad (right) to select thi s item. The menu cha nges to show you
the available options.
6. Press ENTER to save your selection.
7. Repeat steps 4 through 6 until you have completed setting up the display .
8. Press
CANCEL or ENTER twice to return to the default screen.
Chapter 4: Fishfinder Setup 43
4.1 DSM Setup
This section details parameters listed in the Fishfinder Setup menu.
Depth Digit Size
This setting controls the size of the digital depth readout at th e lower left of the
Fishfinder screen. Choose from the following:
•LARGE (default)
•SMALL
Depth Lines
Horizontal dashed lines dr awn at regular intervals to indicate the depth from the
surface. Choose from the f ollowing:
•OFF (default)
•ON
Palette
The DSM25 offers you six different display color combinations. Y ou can select the
color set for a bold or soft color palette . The brightness of the screen can be
adjusted over a wide range, suitable for viewing in daylight (high brightness level)
or at night (low brightness level).
Select the optimal color scheme for your lighting co nditions:
• CLASSIC/BLUE (default)
• CLASSIC/WHITE
• CLASSIC/BLACK
•SUNBURST
• GRAYSCALE
•INV. GRAY
•COPPER
• NIGHT VISION
Y ou will probably find th at you need to change the background color in different
light conditions. For example , CLASSIC/WHITE is probably easiest to see in bright
sunlight, but CLASSIC/BLACK or NIGHT VISION may be preferable at night.
44 DSM25 Owner’s Handbook
Depth Offset
The depth offset is added to the measured depth value before it is displayed. You
can specify the depth as a positive value (WATERLINE OFFSET) or a negative v alue
(KEEL OFFSET). The depth offset can be set adjusted in 0. 1 increments of the units
you have assigned for Depth Units in the setup parameters of the display unit:
meters, fathoms , or feet.
The default is 0.
Speed Calibrate
If the transducer is equipped with a speed paddle wheel, the unit calculates the
speed of the boat through the water . T he speed calibrate option enables you to
adjust the displayed speed so that it matches your actual speed through the
water . Y ou can adjust the displayed speed from 1% to 200%. If the reading is too
low , set Speed Calibration to more than 100%. If the reading is too high, set
Speed Calibrate to less than 100%.
The default is 100%.
Temp Calibrate
If the transducer is equipped with a thermistor, the DSM25 calculates the
temperature of the water . T he temperature calibrate option enables you to adjust
the displayed temperature. Y ou can adjust the displayed temperature by –9.0°F to
+9.0°F or –5.5°C to +5.5°C.
The default is 0º.
DSM Reset
Restore all settings on the DSM to factory default. When performing a DSM Reset,
it is normal to briefly lose connection with the DSM.
Once DSM RESET is selected you have the option to press:
•
CANCEL, to exit without resetting
•
ENTER, to confirm the reset
Trip Reset
This option resets the trip log. Once TRIP RESET is selected you have the option to
press:
•
CANCEL, to exit without resetting
•
ENTER, to confirm the reset
Chapter 4: Fishfinder Setup 45
Interference Rejection (Int Rej)
T wo or more sonar-equipped vessels operating within ran ge of each other can
interfere with sounder operation. This usually appears as vertical str eaks on the
display that do not represent actual targets.
This option can reduce such interference, either manually or automatically.
• AUT OMA TIC selects the best rejection level for you
• LOW minimizes rejection of potential interference . Use this setting when you
want to be sure that what has been removed are really false returns .
• MEDIUM rejects a moderate amount of interference without weakening the
appearance of actual targets.
• HIGH rejects much more interference but can potentially weaken the appearance of actual targets.
The default setting is A UT OMATIC.
Second Echo Rejection
A so-called “second echo” can caused by the sonar signal returning from the
bottom, reflecting off the water’ s surface, bouncing off the bottom again and
returning once more. This option helps eliminate identifying a false bottom.
Select from the following:
• OFF, which offers no rejection
• LOW, which provides minimal rejection by slig htly reducing the ping rate
• HIGH, which offers the greatest signal rejection by decreasing the rate further
The default setting is LOW . Only set this setting to HIGH if you no tice second
echoes appear on your display .
Max. Ping Rate
The setting determines the maximum number of sonar pulses , or ping s, the
transducer emits per second. You can set Max Ping Rate anywhere between 5–
30, in increments of 1. You can reduce this number down to a minimum of 5 pings
per second, if necessary , to help reduce second echoes.
The default setting is 26 pings per second. T his setting is reset at power -up .
Ping Enable
Under most circumstances, the sonar ping is enabled. It can be disabled when
other equipment is being tested or if som eone is diving beneath the boat.
The default setting is ON . This sett ing is reset at power -up.
46 DSM25 Owner’s Handbook
4.2 Fishfinder Alarms
In addition to the A65 system alarms, the following alarms can be set when you
are connected to a DSM or when the simulator is on. Each alarm can be toggled
ON and OFF and you set the threshold at which the alarms a re triggered, except
for the fish alarm.
T o modify the Fishfinder Alarms:
1. Press
MENU.
2. Use the trackpad or rotary knob to select Alarms Setup .
3. Navigate to Fishfinder Alarms Setup.
Setup
Setup
Chart Setup...
Fishfinder Setup...
System Setup...
ENTER
ENTER
Alarms Setup...
GPS Setup...
Display Setup...
Diagnostics Menu...
User Card Menu...
Alarms Setup
Alarms Setup
Alarms Setup
Alarms Setup
Navigation Alarms Setup...
Fishfinder Alarms Setup...
D8527-2
When an alarm is activated, press any k ey to mute the tone.
Y ou may want to use the shallow and deep water alarms when you are anchored.
Set the limits to just above and below your anchor depth. The sounder triggers an
alarm if the anchor drags and the boats moves into shallower or deeper water.
Target Depth ID
Controls whether the depth of identified targets ar e displayed. The default setting
is OFF .
Chapter 4: Fishfinder Setup 47
Fish Alarm
If this alarm is ON, the unit soun ds a beeper whenever it finds a fish. The default
setting is OFF .
Fish Sensitivity
If the Fish Alarm is set ON , an alarm is triggered when the fish return strength
reaches the sensitivity that you specify . Using the rotary knob , select from 1
(lowest sensitivity) to 10 (highest sensitivity). The default setting is 6.
Shallow Alarm
If this alarm is ON and the depth below the boat is less than the value set using the
Shallow Range setting, the beeper sounds and the alarm message box appears.
Y ou cannot set the shallow alarm to be deeper than the deep alarm. The default
setting is OFF .
Shallow Range
Use the rotary knob or up/down trackpad keys to increment/decrement the depth
at which the Shallow Alarm will sound. The depth unit (meters, feet, or fathoms)
is dependent on the Units parameter set in the System Setup menu. Changing the
value set for Shallow Range automatically enables the Shallow Alarm.
Deep Alarm
If this alarm is ON and the depth below the boat is greater than the value set using
the Deep Range setting, the beeper sounds and the alarm message box appears.
Y ou cannot set the deep alarm to be shallower than the shallow alarm. The
default setting is OFF .
Deep Range
Use the rotary knob or up/down trackpad keys to increment/decrement the depth
at which the Deep Alarm will sound. The depth unit (meters, feet, or fathoms) is
dependent on the Units parameter set in the System Setup menu. Changing the
value set for Deep Range automatically enables the Deep Alarm.
Temp. Alarm
If this alarm is ON and the measured water temperature exceeds the value set in
T emp. Range High or falls below the value set in T emp. Range Low, the beeper
sounds and the Temp . Alarm message box appears.
48 DSM25 Owner’s Handbook
The temperature unit used (°C or °F) is dependent upon the Un its parameter set in
the System Set Up menu. The default setting is OFF.
Temp. Range High
Use the rotary knob or trackpad up/down k eys to increment/decrement the upper
threshold for the T emp Alarm. If a temperature above this value is detected, the
T emp. Alarm is triggered. Y ou cannot set the T emp. Range High setting to be lower
than T emp. Range Low .
Temp. Range Low
Use the rotary knob or trackpad up/down keys to increment/decrement the lower
threshold for the T emp Alarm. If a temperature below this value is detected, the
T emp. Alarm is trig gered. Y ou cannot set the T emp . Range Low setting to be
higher than T emp . Range High.
Chapter 5: Maintenance and Problem Solving 49
Chapter 5: Maintenance and Problem
Solving
This chapter provides informa tion on routine maintenance and on possible causes
of problems you may experience with your DSM25.
5.1 Maintenance
CAUTION:
The sounder unit contains high voltage. Adjustments require
specialized service procedures and tools only available to
qualified service technicians. There are no user serviceable parts
or adjustments and the operator should not attempt to service
the equipment. The operator should not remove the rear cover of
the module.
Routine Checks
The DSM25 is a sealed unit. Maintenance procedures are therefore limited to the
following periodic checks:
• Examine the cables for signs of damage, such as chafing, cuts or nicks.
• Check that the cable connectors are firmly attached.
Cleaning Instructions
Cleaning the Module
The DSM25 is a sealed unit and does not require regular cleaning. However, if you
find it necessary to clean the unit, please follow these basic procedures:
• Ensure power is off.
• Wipe the module clean with a damp cloth.
• If necessary , use IP A (isopropyl alcohol) or a mild detergent solution to
remove grease marks.
Cleaning the Tr ansducer
Sea growth can collect quickly on the bottom of the transducer , this can reduce
the performance in just a few we eks. T o pr event the build-up of sea growth, coa t
the transducer with a thin layer of paint.
50 DSM25 Owner’s Handbook
Use only a water-based antifouling paint, or a water -based paint specifically
designed for transducers. Apply the paint with a brush.
If your transducer becomes fouled or stops working because o f sand or sea
growth, use a stiff brush to clean it. You may sand the surface with a fine-grit wet
or dry sandpaper (#320 grade or finer), but this will affect the performance o f the
unit when the boat is moving at higher speeds.
The paddle wheel mechanism may become jammed by dirt, grit or barnacles .
Work the contaminant out of the mechanism, then clean the unit with soap and
water or alcohol.
Cleaning the Hull
Use caution when sanding or cleaning the outside of the hull near the transducer .
CAUTION:
Harsh cleaning solvents such as acetone may damage the
transducer.
EMC Servicing and Safety Guidelines
• Raymarine equipment should be serviced only by authorized Raymarine service technicians. They will ensure that service procedur es and replacement
parts used will not affect performance. T here are no user serviceable parts in
any Raymarine product.
• Some products generate high voltages , so never handle the cables/connectors when power is being supplied to the equipment.
• When powered up, all electrical equipment produces electromagnetic fields.
These can cause adjacent pieces of electrical equipment to interact with one
another , with a co nsequent adverse effect on operation.
T o minimize these ef fects and enable you to get the best possible performance from your Raymarine equi pment, guidelines are gi ven in the installation instructions, to enable you to ensure minimum interaction between
different items of equipment, i.e. en sure optimum Electromagnetic Compat ibility (EMC).
• Always report any EMC-related problem to your nearest Raymarine dealer.
We use such information to improve our quality standards .
• In some installations, it may not be possible to prevent the equipment from
being affected by external influences . In general this will not damage the
equipment but it can lead to spurious resetting action, or may result in
momentary faulty operation.
Chapter 5: Maintenance and Problem Solving 51
5.2 Resetting the Sounder
There are two sounder resets available:
• Power -on reset
• Factory reset
Power-on Reset
When you the A65 off and on again, all previous DSM settings are retained except
for those listed in the following table, which are reset to the factory default.
Default values are li sted in the descriptions for each function.
Accessed by Function Power-On Setting
Range key Range Auto
Range Shift 0
Fishfinder Settings soft k ey Gain Mode Auto
Auto Gain Hi
Color Gain Auto
TVG Auto
Presentation soft key Scroll Man 100%, Resume
Fishfinder Setup menu Max Ping Rate 26 Pings/sec
Display Set Up menu Brightness 100%
Factory Reset
The F actory Reset returns the DSM25 to its default values. Default values are listed
in the descriptions for each function.
T o perform the factory reset:
MENU
ENTER
1. Press
2. Scr oll to and then select FISHFINDER SETUP.
3. Scroll to and select DSM RESET . A message appears , requesting that you confirm the reset.
4. T o confirm the reset, press
T o abandon the reset, press
Ping Enable Enabled
MENU.
ENTER.
CANCEL.
52 DSM25 Owner’s Handbook
5.3 Problem Solving
All Raymarine products are , prior to packing and shipp ing, subjected to
comprehensive test and quality assurance programs. However , if this unit should
develop a fault, please refer to the following table to identify the most likely cause
and the corrective action required to restore normal operation.
If you still have a problem after referring to the table below , contact your local
dealer , national distributor or Raymarine T echnical Services Department for
further advice. Alw ays quote the product serial numbers . The serial number is
printed on the back of the unit.
Common Problems and Their Solutions
Problem Correction
Display “freezes” 1. Check that the scroll speed is not set to zero or P AUSE.
2. Check the transducer cable for damage . If damaged, the
cable and transducer must be replaced as a unit.
Fishfinder does not display fish
Fishfinder does not see
bottom or fish
Fishfinder displays a lot of
background noise
Fishfinder speed or log
readings are wrong
Fishfinder temperature
readings are wrong
Sonar display is unreliable at high boat speeds
1. Fish are not displayed if the boat is stopped targets appear on the display as straight line .
2. Ensure the transducer is within 10° of vertical.
3. Check that the GAIN is not set too low .
1. Check that the GAIN is not set too low .
2. Check that the transducer is within 10° of vertical.
3. Check that the transducer face is not covered or fouled.
If necessary , clean the transducer .
1. Check that the GAIN is not set too high.
2. Check that the transducer is mounted correctly and is
clean.
1. Check that the transducer paddle wheel is clean.
2. If necessary , adjust the SPEED CALIBRA TE parameter .
1. If necessary , adjust the TEMP CALIBRA TE parameter .
1. T urbulence around the transducer may be confusing the
unit.
Chapter 5: Maintenance and Problem Solving 53
Status LED
The LED on the unit fr ont provides valuable informatio n on the status of your
DSM25. 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
problem. For multiple warnings/errors, the codes are given in sequence with a 1.5
second pause between strings.
The following table shows the various LED status codes and their meanings.
No of
Color
blinks Meaning
W Amber 1 Transducer Sense F ailure
A2
Network Not Detected
R 3 High T emperature W arning ✓
N4Reserved
I5Reserved
N6Reserved
Cleared
every 10 min
1
G7Reserved
S 8 Watchdog Timeout Reboot ✓
Red 1 Unknown Error ✓
E 2 Battery Voltage Error ✓
R 3 High T emperature Error ✓
R 4 Flash Memory Failure
O5Reserved
R6Reserved
S7Reserved
8 Hardware Monitor Failure
1
After 30 seconds of no network activity , the DSM25 enters Standby mode: No sonar pings
are emitted and no warnings are output on th e LED . Instead, the LED blinks green once
every 10 seconds.
54 DSM25 Owner’s Handbook
Status LED
D8722-1
As an example , if the T ransducer S ense fails and the network is not detected, the
LED blinks amber once, pauses 1.5 secs, blinks am ber twice 0.5 secs apart, pauses
1.5 secs, and then repeat s the sequence until the problems are re solved or up to
10 minutes elapse.
A solid red LED (not blinking) indicates a fatal error condition. If the event of a
fatal error , the system will power cycle to attempt to self- correct the condition. If
the condition persists , please contact Raymarine Customer Service.
5.4 How to Contact Raymarine
On the Internet
Visit the Raymarine World Wide Web site for the latest information on Raymarine
electronic equipment and systems at:
www .raymarine.com
Customer Support
Navigate to the Customer Support page for links to:
• Finding F actory Service locations and Author ized Dealers near you
• Registering your Raymarine products
• Accessing handbooks in Adobe Acrobat format
• Downloading RayTech software updates
• Accessing the Raymarine solution database
Clicking the Find Answers link routes you to our solution database. Search
questions and answers by product, category, keywords, or phrases . If the answer
you are seeking is not available, click the Ask Raymarine tab to submit your own
question to our technical support staff , who wi ll reply to you by e-mail.
Chapter 5: Maintenance and Problem Solving 55
In the US
Accessories and Parts
Many Raymarine accessory items and parts can be obtained directly from your
authorized Raymarine dealer.
However , if you are in need of an item not available from the retailer , please
contact Raymarine Technical Services at:
1-800-539-5539 ext. 2333, or
1-603-881-5200 ext. 2333.
T echnical Service is available Monday through F riday 4:00 AM to 6:00 PM Eastern
Time.
Please have the Raymarine item or part number ready when calling if placing an
order . If you are not sure which item is appropriate for your unit, you should first
contact the T echnical Support Department to verify your requiremen ts.
Technical Support
For technical support, call:
1-800-539-5539 ext. 2444, or
1-603-881-5200 ext. 2444.
Our T echnical Support Specialists are available to answer questions about
installing, operating and tr ouble-shooting all Raymarin e products.
Questions can be sent directly to our T echnical Support Department via the
Internet. Point yo ur browser to www .raymarine .com and click on the Customer
Support link. From there , select F ind Answers and click the Ask Raymarine tab .
Product Repair and Service
In the unlikely even t your Raymarine unit should devel op a problem, please
contact your authorized Raymarine dealer for assistance. The dealer is best
equipped to handle your service requirements an d can offer timesaving help in
getting the equipment back into normal operati on.
In the event that repairs can not be obtained conveniently , product service may
also be obtained by returning the unit to:
Raymarine, Inc.
Product Repair Center
21 Manchester Street
Merrimack, NH 03054-4801
56 DSM25 Owner’s Handbook
The Product Repair Center is op en Monday through Friday 8:15 a.m. to 5:00p.m.
Eastern Time . All products returned to the Repair Center are registered upon
receipt. Should you wish to inquire about the rep air status of your unit, contact
the Product Repair Center at:
1-800-539-5539 ext. 2118, or
1-603-881-5200 ext. 2118.
Please have the unit serial number , ready when you call. We will do everything
possible to make the repair and return your unit as quickly as possible.
In Europe
In Europe, Raymarine sup port, service and accessories may be obtained from your
authorized dealer , or cont act:
Raymarine plc
Anchorage P ark
Portsmouth, Hampshire
England PO3 5TD
T el:+44 (0) 23 9269 3611
Fax:+44 (0) 23 9269 4642
Technical Support
The T echnical Services Dep artment handles inquiries concerning instal lation,
operation, fault diagnosis and r epair . F or technical helpdesk cont act:
T el:+44 (0) 23 9271 4713
Fax:+44 (0) 23 9266 1228
Accessories and Parts
Raymarine accessory items and parts are available thr ough your authorized
Raymarine dealer . Please refer t o the lists of component part numbers and
optional accessories in the Installation chapt er of this manual and have the
Raymarine part number ready when speaking with your dealer .
If you are uncertain about what item to choose for yo ur Raymarine unit, please
contact our Customer Services Depart ment prior to placing your order.
Worldwide Support
Please contact the authorized distributor in the country .
Appendix: Specifications
General
Approvals:
CE - conform to EN60945:2002
Size: 6.77" x 8.19" x 1.85" (172 x 208 x 47mm)
Weight: 0.85 lbs (386 g)
Mounting: Dash
Power: Supplied by A65 display
57
Environmental:
Operating Range:
Storage Range:
Humidity:
Connectors 7 pin transducer
Sounder Features
Output Power: Adjustable to 500 watts RMS
Frequency Dual 50 kHz and 200 kHz
Pulse Length: 100 µsec to 4 msec
Max. T ransmit Rate: 1580 pulses / min. @ 50’ range
Depth: 3 to 3000 ft (1000 m)
T ransducer: T ransom-mount, T rolling motor -
Waterproof to IPX-7
+14°F to +122°F (–10°C to +50°C)
–4° F to +158°F (–20°C to +70°C)
up to 95% at 35°C non-condensing
8 pin A65 network
mount, in-hull, or thru-hull
58 DSM25 Owner’s Handbook
59
Index
A
Accessories 18, 55
Active Window 27
Alarms 46
Deep Alarm
Deep Range 47
Fish Alarm 47
Fish Sensitivity
Shallow Alarm 47
Shallow Range 47
Target Depth ID
Temp Alarm 47
Temp Range 48
A-Scope
Auto Gain 30
B
Bottom Fill 37
Bottom Lock 34
Bottom Structure 13
C
Cables
Optional 18
Runs
CDI Page 26, 27
Chart Page 25
Cleaning Instructions
Color Gain
Connections
Power
System 22
Transducer
Course Deviation Indicator 27
D
Deep Alarm 47
Deep Range 47
Depth Digit Size 43
Depth Lines
Depth Offset 44
Depths 39
Depth Digit Size
47
47
46
36
21
49
30
22
22
43
43
Depth Lines 43
Target Depth ID 46
Dimensions 19
Distances
DSM Reset 44
39
Depth Digit Size 43
Depth Lines 43
Target Depth ID
46
E
EMC 8, 50
Error Codes 53
F
Factory Reset 51
Fish Alarm 47
Fish Sensitivity Alarm 47
Fishfinder Page
Fishfinder Settings 29
Frequency 31
Full Screen
24
24
G
Gain 29
Automatic
Color 30
Manual 30
Modes
TVG
30
29
Int Rej 45
Max Ping Rate 45
Ping Enable
Second Echo Rejection
45
30
H
Help from Raymarine 54
I
Installation 17
Cable Runs 21
DSM25 Location
Mounting 19
Interference Rejection (Int Rej) 45
18
L
LED Status 53
Location 18
45
60 DSM25 Owner’s Handbook
M
Maintenance 49
Manual Gain 30
Max Ping Rate 45
Menu
Depth Digit Size
Depth Lines 43
Depth Offset
Int Rej 45
Max Ping Rate 45
Palette
Ping Enable 45
Reset 44
Second Echo Rejection
Speed Calibrate 44
T emp Calibrate 44
Trip Reset
Mounting 19
43
44
43
44
N
Nav Data 25
Navigation Data P age 25
O
Optional Equipment 18
P
Page 24
26, 27
CDI
Chart 25
Full Screen 24
Nav Data
Te mperature Graph
Palette
Pause scroll
Phone Numbers 55
Ping Enable
Power
Connection 22
Settings
Power -on Reset 51
Presentation 37
Bottom Fill
Scroll Speed 38
White Line 37
Problem Solving
25
43
39
45
32
37
52
26
45
R
Range 28
Range Shift 28
Repair 55
44, 51
Reset
Routine Checks 49
S
Safety
EMC Guidelines 8
Notices 7
38
Scroll
Second Echo Rejection 45
Service 55
41
Setup
Alarms 46
Deep Alarm 47
Deep Range
Fish Alarm 47
Fish Sensitivity 47
Shallow Alarm
Shallow Range 47
Target Depth ID 46
Temp Alarm
Temp Range 48
Depth Digit Size 43
Depth Lines
Depth Offset 44
Int Rej 45
Max Ping Rate
43
Palette
Ping Enable
44
Reset
Second Echo Rejection
Speed Calibrate
Temp Calibrate 44
Trip Reset 44
Shallow Alarm
Shallow Range 47
Specifications 57
Speed Calibrate
Split Windows 27
Status LED 53
Supplied Equipment
System Connections 22
47
47
43
45
45
44
47
44
17
47
45
61
T
Target Depth ID 46
T echnical Support 55
Temp Alarm 47
T emp Calibrate
Temp Range 48
Temperatur e Graph Page 26
Transducer
Cable
Cleaning 49
Connections
Trip Reset 44
TVG 30
44
22
22
W
Warning Codes 53
Warranty 10, 63
Waypoints
White Line 37
40
Z
Zoom 33
62 DSM25 Owner’s Handbook
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