User manual FURUNO FSV-30 REFERENCE GUIDE

[. . . ] COLOR SCANNING SONAR FSV-30 The paper used in this manual is elemental chlorine free. FURUNO Authorized Distributor/Dealer 9-52 Ashihara-cho, Nishinomiya 662-8580, JAPAN Telephone : Fax : 0798-65-2111 0798-65-4200 All rights reserved. Printed in Japan FIRST EDITION : DEC. OME-13230 ( TATA ) FSV-30 *00014857203* *00014857203* *00014857203* *OME13230D10* *OME13230D10* *OME13230D10* SAFETY INSTRUCTIONS DANGER Keep away from moving shaft of the hull unit. Gears may cause injury. WARNING Keep heater away from equipment. A heater can melt the equipment's power cord, which can cause fire or electrical shock. [. . . ] When a fish school is located on a long range setting (about 800 meters) and is approaching own ship do as follows: Adjust the tilt to keep the fish school in the center of the sonar beam, namely, fish school is displayed in strongest colors possible. Confirm that the fish echo is displayed in the same color as it approaches. If the color suddenly changes to weaker colors as the fish enters MEDIUM and NEAR areas, the TVG is improperly set. If this again produces sea surface reflections and noise try to remove them with AGC and NL controls. Note: If the above procedure does not produce satisfactory results, the TVG curve can be changed on the V-SCAN SETTING menu. Also refere to paragraph 3. 8. 4 "Near AGC" 3-8 3. VERTICAL MODE 3. 8 3. 8. 1 Suppressing Bottom Tail AGC The AGC functions to automatically reduce the receiver gain only against strong echoes such as the bottom or a large fish school. Since weak echoes remain unaffected, a small fish school becomes easier to detect. Adjust it so that the AGC works only on bottom reflections. Do not set it too high; weak echoes may be missed. Press the [MENU] key to open the main menu. Select V-SCAN SETTING menu and press the [MENU] key. Adjust setting from the dialog box as appropriate and press the [MENU] key. The higher the setting the greater the degree of suppression. Select QUIT and press the [MENU] key to conclude. Select QUIT at the top of the menu screen and press the [MENU] key to close all menus. 4. 3. 8. 2 By decreasing pulselength The pulselength determines the length of the transmission pulse emitted into the water. While a longer pulse is advantageous for long range sounding, it has the disadvantage of being poor in discrimination of targets, that is, ability to separate several closely located targets. When searching bottom fish, therefore, it is useful to shorten the pulselength in order to separate fish echoes from bottom reflections. Decrease the pulselength setting to shorten the pulselength. For search of surface and midwater fish in which bottom reflections are not so strong, use the longest pulselength "9". Press the [MENU] key to open the main menu. [. . . ] 4-11 Picture recall. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41 Picture shot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41 Pitch angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14 POWER switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2, 2-2 Presentation mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]