3.MENU – Press this key to show the menus and submenus, which allow you to select a command or adjust a feature. This also accesses search functions for streets, intersections, addresses and highway exits.

4.ARROW KEYS – These keys are used to navigate through the menus, make menu selections and move the map cursor.

5.ENT/ICONS (Enter & Icons) – This key allows you to save data, ac- cept values or execute menu commands. It is also used to create event marker icons.

6.EXIT – The Exit key lets you return to the previous screen, clear data or erase a menu.

7.WPT – (Waypoint) The Waypoint key is used to save and recall way- points, search for waypoints and access the waypoint list. It also launches the Point-of-Interest (POI) search menus and is involved in some navigation functions.

8.ZOUT – (Zoom Out) – This key lets you zoom the screen out. This lets you see a larger geographic area on the map. Less detail is seen as you zoom out.

9.ZIN – (Zoom In) – This key lets you zoom the screen in. Zooming in lets you see greater detail in a smaller geographic area on the map.

Power/lights on and off

To turn on the unit, press PWR. As the unit powers up, the Map Page is displayed first. (To switch to another page, press PAGES← or → to Page NameEXIT.)

To turn on the backlight, press PWR again. The unit has three backlight levels to select from. Repeatedly pressing PWR will cycle through the backlight settings and turn off the backlight.

Turn off the unit by pressing and holding the PWR key for 3 seconds.

Main Menu

The unit has a Main Menu, which contains some function commands and some setup option commands. The tutorial lessons in this section will deal only with functions, the basic commands that make the unit do something. The GPS will work fine for these lessons right out of the box with the factory default settings. But, if you want to learn about the various options, see Sec. 5, System Setup and GPS Setup Options.

You can access the Main Menu from any of the three Page screens by pressing MENUMENU. To clear the menu screen and return to the page display, press EXIT.

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Eagle Electronics 640c manual Power/lights on and off, Main Menu
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640c specifications

Eagle Electronics has made a significant mark in the world of marine electronics with its innovative and reliable products, notably the Eagle Electronics 640C, 640cDF, and the 640c models. These devices are designed for anglers and navigators who seek advanced functionality combined with user-friendly operation.

The Eagle Electronics 640C is a high-performance fish finder that is primarily admired for its vibrant display and precise mapping capabilities. Equipped with a 640x480 pixel, full-color LCD screen, it provides crystal-clear visibility even in bright sunlight. This device uses advanced sonar technology to offer detailed underwater images, allowing users to locate fish with remarkable accuracy. The high-resolution graphics enhance the experience while providing an intuitive interface for easy navigation through its various features.

The 640cDF, a variant of the 640C, elevates the standard fish finder experience by incorporating dual-frequency sonar capabilities. This model operates on both 200 kHz and 83 kHz frequencies, allowing users to switch between narrow and wide beams based on their fishing needs. The dual-frequency technology provides a more comprehensive view of the underwater environment, making it easier to identify different types of fish and underwater structures. Additionally, the 640cDF boasts temperature sensing capabilities, giving anglers valuable data regarding water conditions that can influence fish behavior.

All models in the Eagle 640 series feature built-in GPS navigation. The integrated GPS provides a reliable mapping system that allows users to mark waypoints and create routes, significantly improving navigation efficiency. This technology is vital for those who engage in long-distance fishing trips or travel in unfamiliar waters. The GPS functionality, combined with the sonar capabilities, makes these devices essential tools for successful fishing excursions.

Furthermore, the Eagle 640 series devices come equipped with customizable display options, allowing users to tailor the information presented based on their preferences. The intuitive menu system simplifies the navigation of the device's various features, empowering users to quickly access critical data without unnecessary complications.

In summary, the Eagle Electronics 640C, 640cDF, and the 640c represent a blend of cutting-edge technology and user-centric design in the marine electronics space. With features such as high-resolution displays, dual-frequency sonar, built-in GPS navigation, and customizable settings, these devices enhance the fishing experience, making them invaluable assets for anglers and navigators alike.
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