10. VIDEO SOUNDER OPERATION
10-14
10.6
Reducing Low Level Noise
Light-blue dots may appear over most of the screen. This is mainly due to sediment in
the water, or noise. This noise can be suppressed by adjusting CLUTTER on the SEN-
SITIVITY menu.
Appearance of clutter
When the automatic sounder mode is used, clutter is automatically rejected. To re-
duce low level noise in manual sounder operation, do the following:
1. Push the [ENTER] knob to show the SENSITIVITY window.
Sensitivity menu
2. Rotate the [ENTER] knob to choose CLUTTER and then push the [ENTER] knob.
The CLUTTER setting is shown in normal video.
3. Rotate the [ENTER] knob to choose the setting value.
4. Push the [ENTER] knob and [MENU] key in order to close the menu.
Note:
The setting range is 0-7; the higher the value, the greater the suppression of low
level noise. Choose "0" to turn clutter off.
GAIN 50* 000
NOISE LIMITER
HIGH
CLUTTER
0
WHITE MARKER
OFF
SIGNAL LEVEL
OFF
*: For menu operation, both
of 50 and 200 frequencies appear.
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