Suppressing Gain Of Bottom Echo; Suppressing Sidelobes - Furuno FSV-84 Operator's Manual

3. VERTICAL MODE
3.9.7

Suppressing gain of bottom echo

None-moving echoes such as bottom echo, plankton echo, etc., may be
suppressed by the setting of BOTTOM SUPPRESS in the V-SCAN SETTING
menu (moving echoes such as fish school are not effected by this setting). The
setting range is 0 to 10. The greater the setting, the greater the suppression
level of the bottom, etc.
Note: The excessive setting may suppress slow-moving fish school as well.
3.9.8

Suppressing sidelobes

Sidelobes on the vertical display can be suppressed in the vertical direction, with
SIDELOBE SUPPRESS on the V-SCAN SETTING menu. The setting range is 0
to 3 and 0 is OFF. The higher the setting the greater the suppression.
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