Eagle 640c 用户指南

39

Turn off the unit by pressing and holding the 

 key for 3 seconds.

Main Menu

The unit has a Main Menu which contains both function and setup op-
tion commands. The instructions in this section will deal with sonar
functions, the basic commands that make the unit show sonar signals on
the screen. This sonar unit will work fine right out of the box with the
factory default settings. But, if you want to learn about the various sonar
options, see Sec. 4, Sonar Options & Other Features.

You can access the Main Menu from any of the four Page screens by
pressing 

|

. To clear the menu screen and return to the page

display, press 

. Remember, our text style for "

|

" means

"press the Menu key twice." See a full explanation of our instruction
text formatting on page 5, "How to use this manual…".

Main Menu.