10
KEYBOARD BASICS
The unit sounds a tone when you
press any key. This tells you the
unit has accepted a command.
ON/CLEAR
Use this key to turn the unit on. It
also clears menu selections and
the menus from the screen.
OFF
This key turns the unit off.
MENU
The Magna III and Magna III Plus have many features that are accessed
with this key. To see the first menu, press the MENU key. To see the other
menus, press the MENU key repeatedly.
UP and DOWN ARROWS
Use these keys to adjust virtually every feature and function on the unit.
NOTE: The up arrow key also stops the chart when no menus are
displayed. In other words, anytime you wish to stop the chart, first make
certain no menu is on the screen. Now press the up arrow key. The chart
freezes and the word “STOP” appears at the top of the screen. To start the
chart, press the up arrow key again.
DISPLAY - General
The lights flash for about ten seconds when the Magna III is turned on.
Three menus appear, one after the other. The menus are the lights
(LAMP), feet-meter selection (FEET/METER), and contrast adjustment
(DARK/LIGHT). To turn the lights on, press
the up arrow key. To switch from feet to
meters, press the down arrow key when the
proper menu appears. To adjust the contrast,
wait for the DARK/LIGHT menu to appear.
Now press the up arrow key to darken the
screen, the down arrow to lighten it. The
menus disappear after a few seconds. If you
don’t want to wait, press the ON/CLEAR key
to clear the menus from the screen.
When the Magna III is first turned on, the
display appears similar to the one at right.
The unit is in the automatic mode and the Fish
