User manual RAYMARINE DSM25 DIGITAL SOUNDER MODULE (FOR A65)

DSM25 Digital Sounder Module Owner's Handbook Document number: 81254-2 Date: March 2006 Trademarks and registered trademarks Raymarine is a registered trademark of Raymarine 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 Technical 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 Targets 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 Transducer 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 Variable Gain) ............................................................... 30 Manually Adjusting the Gain Modes .............................................. 30 4 DSM25 Owner's Handbook 3.5 3.6 3.7 3.8 3.9 3.10 Operating Frequency ............................................................................31 Power Settings ......................................................................................32 Zoom ....................................................................................................33 Adjusting the zoom ........................................................................33 Adjusting the Position of the Zoomed Area ....................................34 Bottom Lock .........................................................................................34 A-Scope ................................................................................................36 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 PAUSE/RESUME .............................................................39 Determining Target Depths and Distance ...........................................39 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 Temp Calibrate ...................................................................................44 DSM Reset ..........................................................................................44 Trip Reset ............................................................................................44 Interference Rejection (Int Rej) ...........................................................45 Second Echo Rejection .......................................................................45 Max. Ping Rate ...................................................................................45 Ping Enable ........................................................................................45 4.2 Fishfinder Alarms ................................................................................46 Target Depth ID ..................................................................................46 Fish Alarm ..........................................................................................47 Fish Sensitivity ....................................................................................47 Shallow Alarm ....................................................................................47 Shallow Range ...................................................................................47 Deep Alarm ........................................................................................47 Deep Range ........................................................................................47 Temp. Alarm .......................................................................................47 Temp. Range High ..............................................................................48 Temp. 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 7 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 finding purposes. Echo sounder systems require an appropriate Raymarine transducer unit and inter-connecting cable. Depending on 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. To get the best results in operation and performance, please take the time to read this handbook thoroughly. Raymarine's Technical Services representatives or your local dealer will be available to answer any questions you may 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: WARNING: Electrical Safety The DSM25 contains high voltages. Adjustments require 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 where 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 power 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 transducer is connected at power-up. CAUTION: Ultrasonic Energy The transducer transmits high frequency energy 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.) 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 has 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 optimum EMC performance, but it is recognized that it may not be possible to meet all of these conditions in all situations. To ensure the best possible conditions for EMC performance within the constraints imposed by any location, always ensure the maximum separation possible between different items of electrical equipment. 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 antennas. In the case of 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 supplied from a separate battery from that used for engine start. Voltage drops 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. To 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 connected 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 this 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 key functions, menu names and options are shown in normal capitals (for example, SCREEN). Technical Accuracy The technical and graphical information contained in this handbook, 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 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.com. Warranty To register your DSM25 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. 11 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. The DSM25 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. 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. Transducers can measure water depth, and if so equipped, temperature, distance traveled, and/or speed. It is important to position your transducer correctly. D7737-1 12 DSM25 Owner's Handbook 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 with any bottom structure such as reefs and shipwrecks · Target images indicating fish · The bottom depth You 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 200 kHz 0 Bottom of transducer 20 34 42 44 47 Depth markers 36 44 43 44 47 40 Target images Bottom Target depth 43 Bottom depth 43 9 FISHFINDER SETTINGS ZOOM ft BOTTOM LOCK A-SCOPE 60 PRESENTATION D7910-1 Range Chapter 1: Overview 13 1.3 How the Fishfinder Works The Fishfinder application uses the DSM25 to process sonar signals from a suitable transducer and provide a detailed underwater view. The transducer located on the bottom of the boat sends pulses of sound waves into the water and measures the time it takes for the sound wave to travel to the bottom and back. The 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. You can use this information to determine the bottom structure, the size of fish and other objects in the water. Notes: (1) The DSM can operate at a frequency of 50 kHz or 200 kHz. (2) Some transducers will also enable the A65 to display water temperature and/or speed. Interpreting the Bottom Structure The bottom usually produces a strong echo. These images indicate the bottom conditions as follows: A hard bottom (sand) produces a thin line 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. This 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 are Displayed When a target is detected, it is displayed on screen as a mark. The shape and size 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 boat's speed increases, the target will tend to thicken and arch slightly until at fast speeds the mark resembles 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 Target Depth ID in the Fishfinder Alarms Setup Menu. The size of the target The larger the target, the larger the return on the fishfinder display. The 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 than the fish or bottom echoes, your fishfinder picture may be impaired by echoes received from floating or submerged 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. You 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 Fishfinder 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 RS12 GPS DSM25 Power Supply A65 Display D7746-1 Transducer 17 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 appropriate data. Planning the Installation Before you install your system, plan the installation, considering: · Correct transducer for your application · Location of the sounder module, as described in Section 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: DSM25 Owner's Handbook Owner's Handbook, part no. 81254 Digital Sounder Module, part no. E63070 Mounting Screws, No.8 (x2) 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 install the suppression ferrites, if supplied. Description A65 Network Cable, 8.5m A65 Network Cable 15m Part No E36015 E36016 2.4 Selecting Sounder Module Mounting Location The DSM25 is waterproof to IPX-7 is and is designed to be mounted either above or below deck. Mount the DSM25 where it is: · · · · 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 following should be considered to ensure reliable and trouble free operation: · Access: There must be sufficient space below the unit to enable cable connections to the panel connectors, avoiding tight bends in the cable. · Interference: The selected location should be far enough away from devices that may cause interference, such 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 supplied is 11.5 ft (3.5 m) in length. Longer network cables are available as described in Section 2.3. · Environment: Good ventilation is required to prevent the unit from overheating. 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 Transducer Cable when Powered 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. To 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. To 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 onto the mounting surface. Refer to the following figure. 20 DSM25 Owner's Handbook Ver t x2 ica l D7740-1 3. Drill a 9/64" (3mm) pilot hole at each of the marked locations. Ver t ica l 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 drilling the pilot hole, hand drill the marked location with an oversized bit and countersink to 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 downward so the screws align with the narrow end of the keyholes. 1 m 6 m um im min 2 3 D7742-1 7. Tighten the screws until secure. Do not overtighten. 2.6 Cable Runs You will need to run the following cables: · Data/power cable, supplied with the DSM25. This 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-through wherever a cable passes through an exposed bulkhead or deckhead. 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 Transducer 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 provides the following connection sockets: to A65 to transducer D7743-1 Display Connection The 8-pin connector labelled DISPLAY provides a connection for both power and data to the A65 display. There is no power switch on the DSM25. The unit turns on when the network cable is attached to an A65 display and the A65 is energized. Transducer Connection A 30 ft (10m) cable is supplied with the transducer. 23 Chapter 3: Using the Sounder Module 3.1 Introduction The standard fishfinder 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 the 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) ZOOM BOTTOM LOCK A-SCOPE PRESENTATION D7935-1 FISHFINDER SETTINGS 24 DSM25 Owner's Handbook 3.2 Selecting the Display Page Before viewing fishfinder functions, you must select the fishfinder page on the A65 display. The display provides you with different window configurations for presenting information. To change the display pages: 1. Press the PAGE key. The associated soft keys are displayed: CHART FISHFINDER D7895-1 2. Press the FISHFINDER soft key. The available fishfinder page layout configurations are represented in the next set of soft keys: FULL SCREEN CHART/ FISHFINDER FISHFINDER/ FISHFINDER/ TEMP GRAPH NAV DATA FISHFINDER/ CDI D7934-1 3. Press the soft key for the page layout you want to view: · Full Screen Single window displaying sonar information only 200 kHz 12 20 0 20 42 40 40 D7937-1 46 8 FISHFINDER SETTINGS ft BOTTOM LOCK A-SCOPE 60 PRESENTATION ZOOM Chapter 3: Using the Sounder Module 25 · Chart/Fishfinder Page Split windows displaying sounder and chart information 12nm Csr Pos N N-UP 26°42.618 (RM) W 078°31.961 200 kHz ft 0 20 40 · Fishfinder/Navigation Data Page Split windows displaying sounder and position data (via GPS), including current time, date, TTG, COG, range and bearing and depth information 50 kHz 0 Position N 26°16 618 W 080°03 961 Waypoint NMEA SOG 14 0kts TTG 20 N 26°15:247 W 080°04:612 COG WPT BRG 00h:16m WPT RNG 152° 042° 1.25nm T T 40 Time 9:00:07AM Date 06/07/2005 60 60 FISHFINDER SETTINGS ZOOM A-SCOPE PRESENTATION D7939-1 BOTTOM LOCK 48 6 ft D7938-2 FISHFINDER SETTINGS ZOOM BOTTOM LOCK 48 8ft A-SCOPE 47 60 PRESENTATION 26 DSM25 Owner's Handbook · Fishfinder/Temperature Graph Page Split windows displaying sounder and a graph plotting water temperature readings from the transducer over the past 60 minutes 50 kHz 0 Temperature 74 73 72 71 70 71.5° F 74 73 72 71 70 69 68 20 69 68 60 50 40 30 20 10 0 Minutes - + Speed 4.6 kts nm nm 13.5 V 71.5°F N 26°16.618 W 080°04.961 28.6ft 9:35:08am 40 Log Trip 60 60 FISHFINDER SETTINGS ZOOM A-SCOPE PRESENTATION · Fishfinder/Course Deviation Indicator (CDI) Page Split windows displaying sounder and a graphical representation of your boat's course in a `rolling road' format 200 kHz 0 20 40 >> WPT 0003 STEER STARBOARD ZOOM A-SCOPE PRESENTATION D8704-1 40 8 FISHFINDER SETTINGS COG HEADING 0.067nm WPT BRG 220°T WPT RNG 225°T VMG (WPT) 60 60 BOTTOM LOCK 250 °T 0.42nm 3.1kts D8703-1 BOTTOM LOCK 48 6 ft 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 and 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 checkered 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. You 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 key options for that application are displayed. Pressing the ACTIVE key changes this active highlight to the other window on that page and its associated soft key labels. 28 DSM25 Owner's Handbook 3.3 Adjusting the Display This section describes the controls you can use to change how sounder data 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 bottom and A-Scope images). To range in/out on an image: 1. Press the RANGE key. The 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. To return to the automatic range adjustment, toggle the RANGE soft key to AUTO. The default range setting is AUTO. This setting is reset at power-up. Range Shift The DSM automatically adjusts the display to keep the bottom in the lower half of the display window. Alternatively, you can shift the image within the current range. To shift the image: Press the RANGE key. Soft keys appear, with SHIFT grayed out. Toggle the RANGE soft key to MAN. The SHIFT soft key is no longer grayed out. Press SHIFT. This soft key is highlighted. Use the rotary control to adjust the shift up or down. The value of the shift is displayed on the soft key. 5. To return to the standard fishfinder image, toggle the RANGE soft key to AUTO. 1. 2. 3. 4. The default range shift setting is 0. This setting is reset at power-up. D8622-2 RANGE RANGE AUTO MAN SHIFT 0 ft Chapter 3: Using the Sounder Module 29 Soft Key Selections The soft keys 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 SELECTED FREQ 200 50 BOTH POWER 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. Gain Modes D8223-1 GAIN MODE AUTO MAN AUTO GAIN LO MED HI COLOR GAIN AUTO MAN TVG AUTO MAN The fishfinder provides GAIN controls to reduce background noise and determine how different strength echoes are shown. By default, 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 settings, Raymarine recommends that you retain the AUTO setting to achieve the best results. All of the GAIN settings are reset at power-on. Note: In addition to the controls described in this section, the 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. D8222-2 D7935-2 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 AUTO 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 are 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 adjusts accordingly. The default is AUTO. TVG (Time Variable Gain) The TVG (Time Variable Gain) reduces the clutter by varying the gain throughout the water column. This function is useful for reducing the appearance 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 AUTO. Manually Adjusting the Gain Modes If necessary you can set the gain controls manually. The new values remain set even when you switch off the display and are applied to both the active window and any other fishfinder windows displaying that frequency. 1. Select FISHFINDER SETTINGS and then GAIN. 2. Toggle the required mode to MAN. The 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. This value takes 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 gain is used in deep and/or clear water; a low gain in shallow and/or murky water. · COLOR GAIN. This sets the lower limit for the strongest echo color. All echoes with a signal strength above this value are displayed in 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 value 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 appropriate 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 water 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. This 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. To change the current frequency setting to AUTO mode: 1. Press FISHFINDER SETTINGS. A new set of soft keys appear. 2. Press FREQUENCY until AUTO is highlighted. The SELECTED FREQ soft key is grayed out. 3. Press CANCEL or ENTER to return to the default display. 32 DSM25 Owner's Handbook To change the frequency to a manual setting: 1. Press FISHFINDER SETTINGS. A new set of soft keys appear. 2. Press FREQUENCY until MAN is highlighted. The SELECTED FREQ soft key is no longer grayed out. 3. Toggle the SELECTED FREQ key 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 simultaneously in split windows. 4. Press CANCEL or ENTER to return to the default display. The default setting is AUTO. Power Settings The POWER control provides adjustment of the transducer signal. When AUTO is selected (default), the DSM automatically determines the required power setting based on the current depth, 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). To adjust the Power Setting: 1. Press FISHFINDER SETTINGS. 2. Press POWER. 3. Toggle 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 AUTO. This settings is reset at power-on. Chapter 3: Using the Sounder Module 33 3.5 Zoom . The DSM25 automatically keeps 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. This zoom range box can either replace or appear alongside the standard sounder image. The default setting is OFF. Zoom Range Box Standard Fishfinder Image 200 kHz 36.4 0 43.0 20 49.6 Adjusting the zoom 1. Press ZOOM. 2. Toggle 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. Toggle ZOOM FACTOR 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. D7913-1 ZOOM SETTINGS ON SPLIT OFF 49 4 Zoom x3 40 Zoom Box ft 56.4 ZOOM RANGE BOTTOM ZOOM RANGE LOCK 10ft 10ft ZOOM POSITION ZOOM POSITION AUTO MAN AUTO MAN 60 ZOOM START PRESENTATION ZOOM START 36.2ft 36.2ft ZOOM FACTOR ZOOM FACTOR x2 x3 x4 xR x2 x3 x4 xR D8219-2 ZOOM ON SPLIT OFF ZOOM FACTOR x2 x3 x4 xR ZOOM RANGE 20ft ZOOM POSITION AUTO MAN ZOOM START 20.0ft 34 DSM25 Owner's Handbook These factors are proportioned to the range. Therefore, as the range increases, the area shown in the zoom window also increases. --or-- · XR to adjust manually the range 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 the standard fishfinder soft keys. Adjusting the Position of the Zoomed Area 1. Toggle ZOOM POSITION to: · AUTO 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 START. You 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 images. 3.6 Bottom Lock D8217-2 BOTTOM LOCK ON SPLIT OFF B-LOCK RANGE 20ft BOTTOM SHIFT 10% When you are looking for fish that feed close to the bottom, you 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 intervals are measured up from the bottom (rather than down from the surface). Thus, the bottom is shown as zero and the top number indicates the maximum distance above the bottom being displayed. Bottom Lock can either replace or appear alongside the standard image. The default setting is OFF. Chapter 3: Using the Sounder Module 35 200 kHz 30 20 0 20 10 Btm Lock 40 0 Note: If the A-Scope or Zoom image was displayed, selecting Bottom Lock automatically switches OFF A-Scope and Zoom. To display or remove the Bottom Lock image: 1. Press BOTTOM LOCK. The Bottom Lock soft keys are displayed. 2. Toggle to: · BOTTOM LOCK ON to replace the standard fishfinder image with the bottom lock image. · BOTTOM LOCK SPLIT to display both the standard fishfinder and bottom lock image in a single window. · BOTTOM LOCK OFF to return to the standard fishfinder image. 3. To adjust the range of the Bottom Lock image, press B-LOCK RANGE and then use the rotary knob to adjust the range. 4. To re-position the Bottom Lock image to view more bottom details, press BOTTOM SHIFT and then use the 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. D8218-1 49 8 ft 60 BOTTOM LOCK B-LOCK RANGE BOTTOM SHIFT B-LOCK RANGE BOTTOM SHIFT ON SPLIT OFF 30ft 20% 30ft 20% 36 DSM25 Owner's Handbook 3.7 A-Scope D8329-2 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 structure directly below the transducer. This function is very useful in showing the strength 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 width (indicated with dotted lines) increases with depth. The default setting is OFF. A-Scope MODE 1 MODE 2 MODE 3 200 kHz 0 20 34 42 44 47 36 44 43 44 47 40 43 9 A-SCOPE ON OFF 43 ft 60 14.2 14.2 14.2 A-SCOPE MODE 1 2 3 D7912-1 Note: If the Bottom Lock or Zoom image was displayed, selecting A-Scope automatically switches OFF Bottom Lock and Zoom. Chapter 3: Using the Sounder Module 37 3.8 Presentation You can further adjust the fishfinder image using features accessed via the PRESENTATION soft keys: D8220-2 VRM... WHITE LINE ON OFF BOTTOM FILL ON OFF SCROLL AUTO MAN SCROLL PAUSE RESUME White Line and Bottom Fill These two related features help better define images near the bottom. 200 kHz 0