Erasing Weak Echoes - Furuno GP-7000F Operator's Manual

10.7

Erasing Weak Echoes

Sediments in the water or reflections from plankton may be painted on the
display in green or light-blue. These weak echoes may be erased as below.
1. Push the [ENTER] knob to show the SENSITIVITY window.
2. Rotate the [ENTER] knob to choose SIGNAL LEVEL and then push the
[ENTER] knob to show the signal level window.
PALETTE settings
on GENERAL menu: NOAA
3. Rotate the [ENTER] knob to choose level of erasure or OFF as appropriate.
The higher the number the stronger the echo that will be erased.
4. Push the [ENTER] knob and [MENU] key in order to close the menu.
Note: Unlike "clutter," signal level reduces display colors. Therefore, if you do
not wish to reduce colors, use clutter instead.
Appearance of weak echoes
GAIN 50*
NOISE LIMITER
CLUTTER
WHITE MARKER
SIGNAL LEVEL
*: For menu operation, both
of 50 and 200 frequencies appear.
Sensitivity menu
OFF
SL1
SL2
SL3
SL4
Signal level window
10. VIDEO SOUNDER OPERATION
Weak
echoes
000
HIGH
0
OFF
OFF
OFF
SL1
SL2
SL3
SL4
SL5
SL6
SL7
SL8
SL9
PALETTE settings
on GENERAL menu: other than NOAA
10-15