New Transducers 250C ユーザーズマニュアル

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250C and black on the Fishfinder 250. When set at Normal or 

1-100%, this option can be used to better determine bottom 

hardness. See page 34 for more information on this feature.

•  Frequency—allows you to choose a sonar operation 

frequency. The frequency is the “pitch” of the sound that the 

transducer sends and receives. You may choose 200kHz, 

50kHz, or Dual frequency (when using a dual frequency 

transducer). 

•  Depth Line—adds a horizontal depth line across the display 

to measure the depth of underwater objects. The depth of the 

line is displayed in a box on the right side of the line. When 

the Depth Line adjustment window is visible, press the Up or 

Down ARROW keys to control the position of the line on the 

graph.

•  Noise Reject—helps filter unwanted noise from the graph. 

This option can be turned Off, set to Normal (automatically 

adjusts for optimum viewing), or set to a fixed 

1-100% 

setting. Higher noise rejection settings make the unit less 

likely to show fish or structures.

•  Scroll—adjusts the rate that the graph scrolls from right to 

left. If you are sitting still or the graph is moving too fast, 

slowing the scroll rate or pausing it can be beneficial. Auto 

automatically adjusts the scroll rate according to the boat’s 

speed. (See also “Automatic Scroll Speed Limit” on page 29.)

•  Size Split—enables width adjustment of the Sonar page 

split screen. This option is only available when a split zoom 

is selected. You may adjust the size of the split window 

anywhere from 1/4 to 3/4 width from the right half of the 

Sonar page.

•  Defaults—restores adjustment options back to original 

factory settings.

1.   From the Sonar page split screen, press 

ADJ/MENU.

2.   Using the 

ARROW keys, highlight the Size Split option 

and press 

ENTER. A small double-arrow is displayed in the 

middle of the split line on the screen.

3.   Press the Left or Right 

ARROW keys to move the split line. 

Press 

ENTER when the line.reaches a suitable location.

You may 

resize the 

split line to 

the left or 

the right.

Resizing the Sonar page split screen