Garmin 340c Manuale Utente

u

sIng

 

the

 f

IshfInder

 340c > 

u

sIng

 

the

 A

djustMent

 M

enu

  Off (default)—all high-intensity bottom returns appear as a 

solid color.

  On—the strongest signal from the bottom appears as a bright 

color.

•   Frequency—only appears when using a dual frequency 

transducer. This allows you to choose a sonar operation 

frequency. You can choose 200 khz, 50 khz, or dual 

frequency (to alternate between the two frequencies).

•  Scroll—adjusts the rate at which the Sonar Pages scroll 

from right to left. Ultrascroll (default) is used when you 

select a scroll rate from 90% to 100%. Auto automatically 

adjusts the scroll rate according to the boat’s speed. (See also 

•  depth line—adds a horizontal depth line across the screen 

that is used to measure the depth of underwater objects. The 

depth of the line appears on the right side of the line. Press 

up or down on the ROCKER to control the position of the 

line on the Sonar Pages. Move the slider to the top to turn off 

Depth Line.

•  Zoom—sets a screen zoom scale. The following settings are 

available: 

  Off—turns off the Zoom function.
  2x Zoom––increases the graph zoom level 2x.
  4x Zoom––increases the graph zoom level 4x.
  btm (Bottom) lock––sets the Bottom Lock (returns from 

the bottom up) picture. When using this setting, “BL” 

appears at the bottom of the screen.

•   Zoom View—available when you select a Zoom scale other 

than Off. You can use the Zoom View setting to change the 

viewing range of a zoomed display. Auto follows the water 

bottom. If you select bottom lock, use the Span setting to 

adjust how far off the bottom the Fishfinder shows data.