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The echosounder | NSS Operator Manual
Adjusting color and gain settings
Gain
The gain controls the sensitivity of the echosounder.
The more you increase the gain, the more details will be shown on the image. However, a
higher gain setting may introduce more background clutter on the image. Conversely, if the
gain is set too low weak echoes may not be displayed.
Auto gain
The Auto gain option will keep the sensitivity at a level that works well under most conditions.
With the gain in auto mode, you can set a positive or negative off set that gets applied to the
auto gain. This is indicated as A-40 - A40.
Color
Strong and weak echo signals have diff erent colors to indicate the diff erent signal strengths.
The colors used depend on which palette you select.
The more you increase the Color setting, the more echoes will be displayed in the color at the
strong return end of the scale.
Adjusting the Gain and Color settings
Gain and Color are adjustable by using the rotary knob.
You select between Gain and Color by pressing the rotary knob. The active control will
expand and display it’s name in full. You can then adjust the value by turning the knob.
If you press and hold the rotary knob when Gain is selected, you switch between Auto and
Manual gain option.
If no adjustments are made within 3 seconds the controls will return to default size.
Using the cursor on the echosounder panel
The cursor is by default not shown on the sounder image.
When you tap the screen the cursor will appear and the depth at the cursor position will be
shown, the information window and the history bar will be activated.
To remove the cursor and cursor elements from the panel, press the Clear cursor panel key
or the
X key.
Viewing sounder history
Whenever the cursor is shown on a sounder panel, the red scroll bar is also shown. The scroll
bar shows the image you are currently viewing in relation to the total echosounder image
history stored.
The scroll bar on the far right side indicates that you are viewing the latest soundings. If you
position the cursor to the left side of the screen, the history bar will start scrolling towards left,
and the automatic scrolling as new soundings are received will be turned off .
You can pan the image history by dragging left/right on the screen.
To resume normal scrolling, tap the Clear cursor panel button or press the
X key.
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