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6. FISH FINDER
6.6.4
How to adjust the gain
You can adjust the gain (sensitivity) of the transducer. The correct setting shows some
background noise on the screen. If you do not use enough gain, weak echoes are
erased. If you use more gain than necessary, the background noise hides both weak
and strong targets.
To adjust the gain, tap the cogwheel icon to open the [Settings] menu then drag the
slide bar at [Gain Value], or tap the keyboard icon at [Gain Value] to input the gain val-
ue.
6.7
How to Reduce Clutter
Low intensity "spots" of noise appear over most of screen when clutter is present.
These spots of noise are caused by sediment in the water or noise.
To reduce clutter, tap the cogwheel icon to open the [Settings] menu then tap [Sen-
sitivity]. Drag the slide bar at [Clutter Range], or tap the keyboard icon at [Clutter
Range] to input the value.
Use caution when adjusting the clutter. A high setting reduces more noise, however
weak echoes (small targets) may also be removed.
6.8
How to Reduce Interference
Interference from other fish finders and electrical equipment appears on the screen as
broken vertical lines. When this type of interference appears on the screen, use the
interference rejector to reduce the interference. Three levels are available.
Turn off the interference rejector when there is no interference, so that you do not
erase weak echoes.
To reduce interference, tap the cogwheel icon to open the [Settings] menu then se-
lect [Sensitivity]. At [Interference], select the required level.
6.9
How to Erase Weak Echoes
Sediment in the water and reflections from plankton appear on the display in low-in-
tensity colors.
To erase weak echoes, tap the cogwheel icon to open the [Settings] menu then se-
lect [Sensitivity]. At [Erase Weak Echoes], drag the slider bar, or tap the keyboard icon
to input a value. Select a low value to erase weak echoes. Increase the value to erase
stronger echoes.
6.10
White Marker, White Edge
6.10.1
White marker
The white marker displays the selected echo strength in white.
6-6
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