Bedienungsanleitung Garmin GPSMAP 8500 (Seite 29 von 62) (Englisch)

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Select an option:

• While in the Garmin ClearVü or

SideVü sonar view, select

Contrast.

• While in a

Panoptix LiveVü sonar view, select Color Gain.

• While in another sonar view, select Sonar Setup >

Advanced

> Color Gain

Select an option:

• To increase or decrease the color intensity manually,

select

Up or Down.

• To use the default setting, select Default

Adjusting the Range of the Depth or Width

Scale

You can adjust the range of the depth scale traditional and

Garmin ClearVü sonar views and the range of the width scale

for the SideVü sonar view.

Allowing the device to adjust the range automatically keeps the

bottom within the lower or outer third of the sonar screen, and

can be useful for tracking a bottom that has minimal or moderate

terrain changes.

Manually adjusting the range enables you to view a specified

range, which can be useful for tracking a bottom that has large

terrain changes, such as a drop-offs or cliffs. The bottom can

appear on the screen as long as it appears within the range you

have set.

From a sonar view, select Menu > Range.

Select an option:

• To allow the chartplotter to adjust the range automatically,

select Auto

• To increase or decrease the range manually, select Up or

Down

TIP: From the sonar screen, you can select or to

manually adjust the range.

TIP:

When viewing multiple sonar screens, you can select

Select to choose the active screen.

Setting the Zoom Level on the Sonar Screen

From a sonar view, select Menu

> Zoom

Select an option:

• To zoom in on the sonar data from the bottom depth,

select

Bottom Lock.

• To set the depth range of the magnified area manually,

select

Set Zoom, select View Up or View Down to set the

depth range of the magnified area, and select Zoom In or

Zoom Out to increase or decrease the magnification of

the magnified area.

• To set the depth and zoom automatically, select Set

Zoom >

Auto

• To cancel the zoom, select No Zoom.

Setting the Scroll Speed

You can set the rate at which the sonar image moves across the

screen. A higher scroll speed shows more detail, especially

while moving or trolling. A lower scroll speed displays sonar

information on the screen longer. Setting the scroll speed on

one sonar view applies to all the sonar views.

From a sonar view, select Menu > Sonar Setup > Scroll

Speed.

Select an option:

• To adjust the scroll speed automatically using speed-over-

ground or water speed data, select Auto

The Auto setting selects a scroll rate to match the boat

speed, so targets in the water are drawn with the correct

aspect ratio and appear less distorted. When viewing

Garmin ClearVü or SideVü sonar views, it is recommend

to use the Auto setting.

• To use a very fast scroll speed, select

Ultrascroll®.

The Ultrascroll option quickly scrolls new sonar data, but

with a reduced image quality. For most situations, the Fast

option provides a good balance between a quickly

scrolling image and targets that are less distorted.

Sonar Frequencies

NOTE:

The frequencies available depend on the chartplotter,

sounder modules, and transducer being used.

Adjusting the frequency helps adapt the sonar for your particular

goals and the present depth of the water.

Higher frequencies use narrow beam widths, and are better for

high-speed operation and rough sea conditions. Bottom

definition and thermocline definition can be better when using a

higher frequency.

Lower frequencies use wider beam widths, which can let the

fisherman see more targets, but could also generate more

surface noise and reduce bottom signal continuity during rough

sea conditions. Wider beam widths generate larger arches for

fish target returns, making them ideal for locating fish. Wider

beam widths also perform better in deep water, because the

lower frequency has better deep water penetration.

CHIRP frequencies allow you to sweep each pulse through a

range of frequencies, resulting in better target separation in

deep water. CHIRP can be used to distinctly identify targets, like

individual fish in a school, and for deep water applications.

CHIRP generally performs better than single frequency

applications. Because some fish targets may show up better

using a fixed frequency, you should consider your goals and

water conditions when using CHIRP frequencies.

Some sonar black boxes and transducers also provide the ability

to customize preset frequencies for each transducer element,

which enables you to change the frequency quickly using the

presets as the water and your goals change.

Viewing two frequencies concurrently using the split-frequency

view allows you to see deeper with the lower frequency return

and, at the same time, see more detail from the higher

frequency return.

Selecting Frequencies

NOTE:

You cannot adjust the frequency for all sonar views and

transducers.

You can indicate which frequencies appear on the sonar screen.

From a sonar view, select Menu > Frequency.

Select a frequency suited to your needs and water depth.

For more information on frequencies, see Sonar

Frequencies, page 21.

Creating a Frequency Preset

NOTE: Not available with all transducers.

You can create a preset to save a specific sonar frequency,

which allows you to change frequencies quickly.

From a sonar view, select Menu >

Frequency

Select Manage Frequencies > New Preset.

Enter a frequency.

Customizing the Panoptix Sonar Views

NOTE:

Not all models support Panoptix transducers.

Adjusting the Appearance of the LiveVü Sonar Views

From a

LiveVü sonar view, select

> Sonar Setup

Sonar 21

Garmin GPSMAP 8500 Seite 29

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