Bedienungsanleitung Garmin GPSMAP 820xs (Seite 25 von 46) (Englisch)

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Sonar Alarm Settings

NOTE:

Some settings require external accessories.

Select

Settings

> Alarms > Sonar

Shallow Water: Sets an alarm to sound when the depth is less

than the specified value.

Deep Water: Sets an alarm to sound when the depth is greater

than the specified value.

Water Temp.: Sets an alarm to sound when the transducer

reports a temperature that is 2°F (1.1°C) above or below the

specified temperature.

Fish: Sets an alarm to sound when the device detects a

suspended target.

• sets the alarm to sound when fish of all sizes are

detected.

• sets the alarm to sound only when medium or large

fish are detected.

• sets the alarm to sound only when large fish are

detected.

Advanced Sonar Settings

NOTE:

Not all options and settings apply to all models, sounder

modules, and transducers.

From a sonar view, select

> Sonar Setup > Advanced

Interference: Adjusts the sensitivity to reduce the effects of

interference from nearby sources of noise.

The lowest interference setting that achieves the desired

improvement should be used to remove interference from the

screen. Correcting installation issues that cause noise is the

best way to eliminate interference.

Surface Noise: Hides surface noise to help reduce clutter.

Wider beam widths (lower frequencies) can show more

targets, but can generate more surface noise.

Color Gain: See Adjusting the Level of Detail.

TVG: Adjusts the appearance of returns to compensate for

weakened sonar signals in deeper water, and reduces the

appearance of noise near the surface. When the value of this

setting is increased, the colors associated with low-level

noise and fish targets appear more consistent through

various water depths. This setting also reduces the noise

near the surface of the water.

Transducer Installation Settings

NOTE:

Not all options and settings apply to all models, sounder

modules, and transducers.

From a sonar view, select

> Sonar Setup > Installation

Restore Sonar Defaults: Restores the factory default settings

for the sonar view.

Transducer Type: Allows you to select the type of transducer

that is connected to the device.

Shift: Allows you to set the depth range on which the sonar is

focused. This enables you to zoom in to an area within the

focused depth.

Flip Left/Right: Changes the orientation of the SideVü sonar

view when the transducer is installed backward.

Flipped: Sets the orientation of the Panoptix sonar view when

the transducer is installed with the cables pointing toward the

port side of the boat.

Beam Width: Sets the width of the

Panoptix transducer beam.

Narrow beam widths are better for high-speed operation and

rough sea conditions. They also can improve bottom

definition and thermocline definition.

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. Wider beam

widths can also generate more surface noise and reduce

bottom signal continuity during rough sea conditions.

Use AHRS: Allows the internal attitude heading and reference

system (AHRS) sensors to detect the installation angle of the

Panoptix transducer. When this setting is turned off, it is

assumed the transducer is installed at a 45-degree angle.

Sonar Recordings

Recording the Sonar Display

NOTE:

Not all models support sonar recording.

Insert a memory card into the card slot.

From a sonar view, select MENU > Sonar Setup > Sonar

Recording > Record Sonar.

15 minutes of sonar recording uses approximately 200 MB of

space of the inserted memory card. You can record sonar

until the card reaches capacity.

Stopping the Sonar Recording

Before you can stop recording sonar, you must begin recording

it (Recording the Sonar Display).

From a sonar view, select MENU > Sonar Setup > Sonar

Recording > Stop Recording.

Deleting a Sonar Recording

Insert a memory card into the card slot.

From a sonar view, select MENU > Sonar Setup > Sonar

Recordings

> View Recordings

Select a recording.

Select

Delete.

Playing Sonar Recordings

Before you can play back the sonar recordings, you must

download and install the HomePort

™

application and record

sonar data onto a memory card.

Remove the memory card from the device.

Insert the memory card into a card reader attached to a

computer.

Open the

HomePort application.

Select a sonar recording from your device list.

Right-click the sonar recording in the lower pane.

Select

Playback.

Depth and Water Temperature Graphs

If you are using a depth-capable transducer, or are receiving

water depth information over NMEA

0183 or

NMEA 2000, you

can view a graphic log of depth readings over time. If you are

using a temperature-capable transducer, or are receiving water

temperature information over NMEA 0183 or NMEA 2000, you

can view a graphic log of temperature readings over time.

The graphs scroll to the left as information is received.

Select

Sonar

> Data Graphs

Setting the Depth and Water Temperature Graph

Range and Time Scales

You can indicate the amount of time and the range of depth that

appear in the depth and water temperature graphs.

Select Sonar

> Data Graphs > MENU

Select

Depth Graph Settings or Temperature Graph

Settings.

Select an option:

• To set a time-elapsed scale, select Duration

. The default

setting is 10 minutes. Increasing the time-elapsed scale

allows you to view variations over a longer period of time.

Sonar 19

Garmin GPSMAP 820xs Seite 25

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