Furuno FSV-84 manual Suppressing gain of bottom echo, Suppressing sidelobes

3. VERTICAL MODE

3.9.7Suppressing 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.

3.9.8Suppressing 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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