Bedienungsanleitung Garmin Fishfinder 250 (Seite 21 von 40) (Englisch)

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The Zoom function has seven settings:

No Zoom –– Displays the sonar picture with no zoom.

2x Split –– Shows two reduced-size sonar pictures at the same time. The right half of the display

screen shows the complete sonar picture at its original scale. The left half shows a portion of the

original picture at 1/2 depth scale.

2x Zoom –– Displays the 2x zoomed picture on the full screen and does not show the original scale

picture.

4x Split –– Shows two reduced pictures, the right at the original depth scale and the left at 1/4 the

original depth scale.

4x Zoom –– Displays only the 4x zoomed picture on the full screen.

Btm (Bottom) Split –– Shows two reduced pictures, the right at the original depth scale and the

left showing only sonar returns close to the bottom. The bottom is displayed as a ﬂ at line across the

bottom of the screen, and returns are shown at their distance from the bottom up. You can adjust the

scale of the Bottom Split display by changing the Span setting (see below).

Btm (Bottom) Lock –– Displays the Bottom Lock (returns close to the bottom, shown at their

distance from the bottom up) picture on the full screen. You can adjust the scale of the Bottom Lock

display by changing the Span setting (see below).

• View/Span — available when a Zoom scale other than ‘No Zoom’ is selected. The ‘View’ or ‘Span’ set-

ting is used to change the viewing range of a zoomed display. The ‘View’ option is enabled when the display

is set to 2x Split, 2x Zoom, 4x Split, or 4x Zoom. If the display is 2x or 4x split, only the zoomed portion on

the left side of the display is affected by the change. If the display is Bottom Split or Bottom Lock, the ‘Span’

option is enabled to adjust how far off the bottom the unit displays data.

• Gain — controls the sensitivity of the unit’s receiver. This provides some ﬂ exibility in what is seen on

the display. To see more detail, increase the receiver sensitivity by selecting a higher gain percentage. If there

is too much detail or if the screen is cluttered, lowering the sensitivity may increase the clarity of the display.

• Target Level — adjusts which colors (Fishﬁ nder 250C) or shades of gray (Fishﬁ nder 250) are used to

display sonar information. A Color Bar (see pg. 17) is displayed on the right side of the screen as you adjust

this setting. A higher percentage results in more strong-signaled colors or shades (see pg. 11) displayed on

the Sonar Page. A lower percentage results in more weaker-signaled colors or shades (see pg. 11) displayed

on the Sonar Page. This setting does not increase/decrease the unit Gain.

2x Zoom

View

Normal View

Sonar 2x Split Screen

(shown with Depth Line)

Sonar View Adjustment

Bar

represents

area shown

on 2x View

Depth Line

Unit Operation

Adjustment Menu Options

250C Manual.indd 13 1/27/2004, 3:55:06 PM

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