Rejecting Low Level Noise - Furuno FCV-1900 Operator's Manual

1. OPERATION
2. Select [Sounder], then push the ENTER knob.
3. Select [Color Erase], then push the ENTER knob.
4. Select the color to erase, then push the ENTER knob.
The larger the setting value, the greater the number of colors the are
erased.
5. Press the MENU/ESC key several times to close the menu.
1.19

Rejecting Low Level Noise

Low intensity "speckles" may appear over most of screen. This is mainly due to sedi-
ment in the water or noise. These unwanted echoes can be rejected.
1. Press the MENU/ESC key, then open the [Setting], [External fish finder] or [Tele-
sounder] tab.
2. Select [Sounder], then push the ENTER knob.
3. Select [Clutter], then push the ENTER knob.
For [Setting] and [Telesounder] tab, go to next step. For [External fish finder] tab,
go to step 7.
For [Setting] and [Telesounder] tab
4. Select [HF Clutter Curve] or [LF Clutter Curve] as applicable, then push the EN-
TER knob.
5. Select [Std] or [Linear], then push the ENTER knob.
• [Std]: Strong color echoes are displayed as is and weak color echoes are shown
smaller, when the clutter level setting is raised.
1-24
Clutter
HF Clutter 40%
HF Clutter Curve Std
LF Clutter 40%
LF Clutter Curve Std
Clutter
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
For [External fish finder] tab
Color Erase
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
50%