Furuno FSV85MK2, Manual

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4. SLANT MODE
4-13
4.10.3 Interference rejector
This control is similar to the interference rejector on echo sounders and radars. It is
effective for rejecting random noise and sea surface reflections in rough sea condi-
tions. Set it so that noise is just eliminated. Do not use an unnecessarily high setting
since it may also reject small, wanted echoes.
1. Press the MENU/ESC key to show the main menu.
2. Select [Picture Setting] then push the left-click button.
3. Press the
H/V/S key to select the [S] tab.
4. Select [Int Reject] then push the left-click button.
5. Select
 or  then push the left-click button to adjust the setting. The setting
range is 0-3. (Strong: 3

1

2:Weak)
6. Select [Quit] on the setting box then push the left-click button to close the box.
7. Long-press the
MENU/ESC key to close all menus.
4.10.4 Shift TX frequency
If the interference can not be suppressed by the interference rejector or change in TX
interval, shift the Tx frequency with the [Frequency] menu.
1. Press the MENU/ESC key to show the main menu.
2. Select [TX/RX Setting] then push the left-click button.
3. Press the
H/V/S key to select the [S] tab.
4. Select [Frequency] then push the left-click button.
5. Select [Freq Shift1] then push the left-click button.
6. Select
 or  then push the left-click button to adjust the setting from the dialog
box. The setting range is -65 to 65.
7. Select [Quit] on the setting box then push the left-click button to close the box.
Note: When you operate the sonar with the following settings in shallow water, the sea
clutter from the previous transmission may appear in near range. To suppress the clut-
ter, reduce [TX Interval] by 2 or 3.
• Range: 60 to 200 m
• TX Pulse setting: 9