User manual EAGLE FISHMARK 320 ADDITIONAL INSTRUCTIONS

[. . . ] 988-0143-661 www. eaglesonar. com Fish-finding & Depth Sounding Sonars FishMark 320 and SeaFinder 320DF Installation and Operation Instructions Copyright © 2002 Eagle Electronics All rights reserved. Eagle® is a registered trademark of Eagle Electronics Marine-Tex is a trademark of Illinois Tool Works Inc. Eagle Electronics may find it necessary to change or end our policies, regulations, and special offers at any time. We reserve the right to do so without notice. All features and specifications subject to change without notice. [. . . ] As you change the sensitivity setting, you can see the difference on the chart as it scrolls. You can change the sensitivity level whether you are in Auto Sensitivity mode or Manual Sensitivity mode. The adjustment method works the same in both modes, but it gives you slightly different results. Adjusting sensitivity in Auto Sensitivity Mode is similar to manually adjusting a car's speed with the accelerator pedal while cruise control is on. You can tell the car to run faster, but when you let off the gas the cruise control automatically keeps you from running slower than the minimum speed setting. In the sonar unit, auto mode will let you increase sensitivity to 100 percent, but the unit will limit your minimum setting. This prevents you from turning sensitivity down too low to allow automatic bottom tracking. When you change the setting with auto turned on, the unit will continue to track the bottom and make minor adjustments to the sensitivity level, with a bias toward the setting you selected. 40 Adjusting sensitivity in Manual Sensitivity Mode is similar to driving a car without cruise control -- you have complete manual control of the car's speed. In the sonar unit, manual mode allows you to set sensitivity at 100 percent (maximum) or zero percent (minimum. ) Depending on water conditions, the bottom signal may completely disappear from the screen when you reduce sensitivity to about 50 percent or less! Fig. 4 These figures show results of different sensitivity levels on the same location. 1: Sensitivity at 88 percent, determined by Auto Sensitivity. 4: Sensitivity set at 100 percent. Try adjusting sensitivity in both auto and manual modes to see how they work. Press to decrease sensitivity; press to increase sensitivity. When it's set at the desired level, press EXIT. (When you reach the maximum or minimum limit, a tone sounds. ) At left, Sonar Menu with Sensitivity command selected. At right, the Sensitivity Control Bar. NOTE: If you want to change the sensitivity in Manual Mode, first turn off Auto Sensitivity: from the Sonar Page, press MENU| to AUTO SENSITIVITY|ENT| to SENSITIVITY|ENT. Press or to pick a different sensitivity setting. When it's set at the desired level, press EXIT. Important Tip: While you are experimenting and learning, it's possible to scramble the settings so that the sonar picture disappears from your screen. If that happens, remember that it's easy to switch back to full automatic operation by simply restoring the factory auto settings. Here's how: To Restore Factory Settings 1. Press MENU|MENU| to RESET OPTIONS|ENT. 2. [. . . ] Many times, customer service can resolve your problem over the phone without sending your product to the factory. To call us, use the following toll-free number: 800-324-1354 8 a. m. Central Standard Time, M-F Eagle Electronics may find it necessary to change or end our shipping policies, regulations, and special offers at any time. We reserve the right to do so without notice. . . . in Canada: If you're in Canada and you have technical, return or repair questions, please contact the Factory Customer Service Department. [. . . ]