14.5 Fishfinder preset configurationSonar frequencyThe frequency of the sonar determines the width of the sonar beam,the depth to which the signals will penetrate and the resolutionof the image. Each of the preset operating modes has its ownfrequency settings.The frequencies supported depend upon the DSM and transducerin use on your system.• Auto. When operating in automatic frequency the system will setand adjust the frequency automatically to suit your transducerand operating conditions.• Lower frequencies (e.g. 50 kHz) produce a wide sonar beamand penetrate the water well. A lower frequency provides a lowerresolution image that may not be as good at detecting small fish.Use lower frequencies if you require a large coverage beneathyour vessel or if you are in deep water.• Higher frequencies (e.g. 200 kHz) produce narrow beamand produce a high resolution image. They are most useful inshallower water (up to 1000 ft) and at higher speeds.Setting the fishfinder frequencyWith the Adjust Preset menu options you can:• Configure one or two frequencies for each of the four presets.• Select a display mode.• Edit preset names.• Reset presets to factory defaults.1. From the fishfinder application select Menu.2. Select Adjust Preset , where is the presetalready selected.3. Select Configure Frequencies.4. Select Select Frequency 1 or Select Frequency 2 as required.5. Select the required frequency: Auto, low frequency or highfrequency6. You can also manually adjust the frequency by selecting therelevant Tune Frequency option.The Tune Frequency menu is displayed7. Select the Tune Frequency so that Man is highlightedSelecting Tune Frequency will switch between Auto and Manual.8. Use the Rotary Control to adjust the frequency to the requiredsetting.Changing fishfinder preset namesFrom the fishfinder application:1. Select Menu.2. Select Adjust Preset , where is the presetalready selected.3. Select Edit Name.4. Select the required characters.5. Select Save to save the new preset name.14.6 Fishfinder display modesSelecting a fishfinder display modeFrom the fishfinder application:1. Select Menu.2. Select Adjust Preset , where is the presetalready selected.3. Select Display Mode.4. With dual frequency preset, select Adjust to select whichfrequency display you wish to change.Selecting Adjust in Dual frequency preset will switch betweenFrequency 1 and Frequency 2.5. Select Select Mode.6. Select the required display mode:• None• Zoom• Bottom Lock• A-ScopeFishfinder zoom modeThe zoom display mode magnifies a region of the fishfinder screento display more detail.This zoom option enables you to:• Replace the standard fishfinder image with the zoomed image,or display the zoomed image alongside the standard fishfinderimage.• Set the zoom factor to a predefined level, or adjust it manually.• Reposition the zoomed portion of the image to a different pointin the display.When the range increases, the area shown in the zoom windowalso increases.Zoom splitWith the zoom display mode you can split the screen and displaythe zoomed image alongside the standard fishfinder image (ZOOMSPLIT). The zoomed section is indicated on the standard fishfinderscreen by a zoom box.Selecting zoom split screenFrom the fishfinder application, with Zoom preset selected:1. Select Menu.2. Select Adjust Preset , where is the presetalready selected.3. Select Display Mode.4. Select Zoom so that Split is highlighted.Selecting Zoom will switch between Split and Full.Adjusting the fishfinder zoom factorWhen the zoom function is active (Zoom Full or Zoom Split), youcan either select a predefined zoom factor or adjust it manually.From the fishfinder application, with Zoom preset selected:1. Select Menu.2. Select Adjust Preset , where is the presetalready selected.3. Select Display Mode.4. Select Zoom Factor.Using the fishfinder 161
