Eagle Electronics 640C, 640cDF Fish Finder User Manual


 
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3. Press or to select chart name|
ENT| to SONAR SIMULATOR
ON|ENT|EXIT.
While you are in the Sonar Simulator menu, do not forget to check
Simulate Position if you want to run the sonar and GPS simulators
simultaneously. As you review sonar logs, you can create waypoints
at sites you want to revisit.
While the simulator is running, you can switch from one chart log
to another by opening the Sonar Simulator menu and using the in-
structions in steps 2 and 3 to select a different chart.
NOTE:
If you turn on your unit before attaching a transducer, it may enter
demo mode, which will scroll a sonar chart across the screen. The
words demo mode flash on the bottom of the display. Demo mode will
stop when you turn on the unit with a transducer attached.
Stop Chart
If you are running multiple units on a boat or using this unit in a car,
there are times when you may want to turn off the sonar. The Stop
Chart command stops the chart from scrolling. The sonar chart will
restart each time you turn on your unit.
From the Sonar Page press
MENU| to STOP CHART|ENT|EXIT.
To turn get the sonar chart scrolling again, repeat the step above.
Sonar Menu with Stop Chart command selected.
Surface Clarity
The markings extending downward from the zero line on the chart are
called surface clutter. They are caused by wave action, boat wakes,
temperature inversion and more. The surface clarity control reduces or
eliminates surface clutter signals from the display. It does this by