Insignia 450TX manual Box will move vertically to remain in the general

Lower Zoom Limit

USING THE 450TX

MENU FUNCTIONS

depth ranges, TruZoom displays a range equal to one fourth the current depth range. The box at the right side of the screen outlines the area to be zoomed.

The 450TX shows Zoom range in conjunction with the full depth range. The Zoom range is shown on the left side of the screen and full range information

is shown on the right side of the display. The area

which is being enlarged by Zoom is indicated by the square box. Zoom can either operate automatically, in which the Zoom range is constantly adjusted

to show the bottom, or manually, in which the user controls the location of
the Zoom range.
“Automatic” Zoom is especially Upper Zoom Limit
helpful	when looking for
structure or bottom detail. The
“Automatic” Zoom keeps the
bottom in view even in quickly
changing	terrain.	“Manual”
Zoom	provides	detailed
information of any area from
the surface to the bottom.

In “Manual” Zoom, the Zoom

range does not move as the terrain changes. To operate

Zoom, press MENU repeatedly until the Zoom menu is on-

screen. Three options are available: “Off” (Factory

Setting), “Auto” (Automatic bottom tracking Zoom), and “Manual” (User controlled Zoom range). Press

the DOWN ARROW once to highlight Auto or twice to highlight Manual. If Manual is selected a submenu

will appear allowing manual zoom range adjustment. When the menu disappears, full range information is displayed on the right as always. The square box indicates the Zoom range. In Auto Zoom,

the box will move vertically to remain in the general

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