Garmin 340c Benutzerhandbuch

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1.  Press

ADJ/MENU. A list of all options and their current

settings appears. The Adjustment Menu automatically

disappears when idle for 20 seconds, or you can press

ADJ/MENU to exit.

2.  Press the

ROCKER to select the option that you want to

change, and then press

ENTER to show the settings. The

current setting is highlighted in yellow.

3.  Press the

ROCKER to select a new setting.

4.  Press

ENTER to accept the new setting and return to the

Sonar Page.

The current adjustment option appears in the upper-left corner 

of the screen. For fast adjustment from a Sonar Page, press left 

or right on the ROCKER to scroll through the options. Press up 

or down on the ROCKER to change the current setting, or press 

ENTER to review the setting before you make changes.
Available adjustments are:

• 

Range—sets the screen depth range used for viewing. Auto 

(recommended) automatically tracks the bottom, or you can 

set a specific depth range (making sure the range includes the 

bottom of the water). 

• 

Gain—controls the sensitivity of the Fishfinder’s sonar 

receiver. Auto (default) is the recommended setting. It 

automatically sets the sonar sensitivity. You can also set the 

gain manually. To see more detail on the screen, increase the 

receiver sensitivity by selecting a higher gain. If there is too 

much detail or if the screen is cluttered, lower the sensitivity 

(lower the gain) to increase the clarity of the screen. If 

Frequency is set to dual, you can set the Gain separately for 

each frequency (50 kHz and 200 kHz).

•   Color Gain—controls what colors are applied to the objects 

on the screen. Auto (default) is the recommended setting. 

It automatically sets the colors, based on your Auto Color 

Gain setting. You can also set the Color Gain manually. 

If Frequency is set to dual, you can set the Color Gain 

separately for each frequency (50 kHz and 200 kHz).

•  beam—only appears when using a dual beam transducer. 

This controls the angle of the transducer beam. Wide beam 

allows you to see more fish in shallow water, even off the 

sides of the boat. You can also choose Narrow (default) 

beam.

•  Whiteline—can make it easier to identify the hardness of the 

bottom (hard or soft). This setting adjusts a brightly-colored 

highlight of the strongest signal area of the bottom.