Handleiding Garmin GPSMAP 557 (pagina 24 van 48) (Engels)

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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.

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 Add.

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 Menu > Sonar Setup.

Select an option:

• To change the colors of the sonar view, select Color

Scheme, and select an option.

• To adjust the length of the trails that show target

movement, select Trails, and select an option.

• To show or hide the range grid lines, select Grid Overlay.

• To hide or show the history on the side of the screen,

select Scroll History.

Setting the LiveVü Transducer Transmit Angle

You can change the LiveVü transducer transmit angle to aim the

transducer at a particular area of interest. For example, you

might aim the transducer to follow a bait ball or focus on a tree

as you pass it.

From a LiveVü sonar view, select Menu > Transmit Angle.

Select an option.

Adjusting the RealVü Viewing Angle and Zoom Level

You can change the viewing angle of the RealVü sonar views.

You can also zoom in and out of the view.

From a RealVü sonar view, select an option:

• To adjust the viewing angle diagonally, select .

• To adjust the viewing angle horizontally, select .

• To adjust the viewing angle vertically, select .

• To adjust the viewing angle, swipe the screen in any

direction.

• To zoom in, spread two fingers apart.

• To zoom out, pinch two fingers together.

Adjusting the Appearance of the RealVü Sonar Views

From a RealVü sonar view, select Menu.

Select an option:

• To adjust the depth at which the color palette starts over,

select Palette Depth, and select an option.

• To select a different color palette for the sonar return

points, select Sonar Setup > Point Colors, and select an

option.

• To select a different color palette for the bottom, select

Sonar Setup > Bottom Colors, and select an option.

• To select a different style for the bottom, select Sonar

Setup > Bottom Style, and select an option.

• To hide or show the color legend on the side of the

screen, select Sonar Setup > Color Key.

Adjusting the RealVü Sweep Speed

You can update how quickly the transducer sweeps back and

forth. A faster sweep rate creates a less detailed image, but the

screen refreshes faster. A slower sweep rate creates a more

detailed image, but the screen refreshes more slowly.

NOTE: This feature is not available for the RealVü 3D Historical

sonar view.

From a RealVü sonar view, select Menu > Sweep Speed.

Select an option.

Turning On the A-Scope

NOTE: This feature is not available in all sonar views.

The a-scope is a vertical flasher along the right side of the full-

screen sonar view. This feature expands the most recently

received sonar data so that it is easier to see. It can also be

helpful for detecting fish that are close to the bottom.

From a sonar view, select Menu > Sonar Setup >

Appearance > A-Scope.

Selecting the Transducer Type

Before you can select the transducer type, you must know what

kind of transducer you have.

If you are connecting a transducer that was not included with the

chartplotter, you may need to set the transducer type to make

the sonar function properly. If the device automatically detected

your transducer, this option does not appear.

From a sonar view, select Menu > Sonar Setup >

Installation > Transducer Type.

Select an option:

• If you have a 200/77 kHz, dual-beam transducer, select

Dual Beam (200/77 kHz).

• If you have a 200/50 kHz, dual-frequency transducer,

select Dual Frequency (200/50 kHz).

• If you have another type of transducer, select it from the

list.

Sonar Setup

NOTE: Not all options and settings apply to all models, sounder

modules, and transducers.

Sonar Settings

NOTE: Not all options and settings apply to all models, sounder

modules, and transducers.

From a sonar view, select Menu > Sonar Setup.

Depth Line: Shows a quick-reference depth line.

Scroll Speed: Sets the rate at which the sonar scrolls from right

to left.

In shallow water you might want to slow the scroll speed to

extend the length of time the information is displayed on

screen. In deeper water you can increase the scroll speed.

18 Sonar

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