User manual EAGLE SEAFINDER 640C DF OPERATION INSTRUCTION

[. . . ] 988-0143-861 www. eaglesonar. com Fish-Finding & Depth-Sounding Sonars Installation and Operation Instructions Copyright © 2005 LEI-Eagle All rights reserved. Eagle®, FishMark® and SeaFinder® are registered trademarks of LEI No part of this manual may be copied, reproduced, republished, transmitted or distributed for any purpose, without prior written consent of Eagle Electronics. Any unauthorized commercial distribution of this manual is strictly prohibited. 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. [. . . ] 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. 48 Sonar Menu (left) with Sensitivity command selected. The Sensitivity Control Bar is shown at right. 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 restoring the factory auto settings. Here's how: To Restore Factory Settings 1. Press MENU|MENU| to RESET OPTIONS|ENT. 2. The unit asks if you want to reset all the options. All options are reset and the unit reverts back to the Full Sonar Chart. Full Sonar Chart You may have noticed in the quick reference we used fish arches in full sonar chart mode for our example instead of the popular Fish I. D. is an easier way for a sonar novice to recognize a fishy signal return when he sees it. However, locating fish by symbol only has some limitations. Your sonar unit's microprocessor is remarkably powerful but it can be fooled. Some of the echoes calculated to be fish could be tree limbs or turtles. To see what's under your boat in maximum detail, we recommend you turn off Fish I. D. and begin learning to interpret fish arches. is most handy when you're in another part of the boat or performing some task that prevents you from watching the sonar screen. When that lunker swims under your boat, you'll hear it!can also be useful when you want to screen out some of the sonar detail gathered by your unit. [. . . ] 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. Before any product can be returned, you must call customer service to determine if a return is necessary. Many times, customer service can resolve your problem over the phone without sending your product to the factory. [. . . ]