3. VERTICAL MODE
3-14
3.9.5
Reverberation
You may choose the length of reverberation for the echo signal, with [Reverberation]
in the [TX/RX Setting] menu on the [V] tab. The larger the value, the lower the rever-
beration effect, which makes it easier to see the echo signal. The setting range is 0-3.
3.9.6
Echo average
[Echo Average] on the [Picture Setting] menu in the [V] tab adjusts echo afterglow -
the amount of time an echo signal remains on the screen. This feature can be useful
for watching echo movement. The setting range is 0-7.
Setting between 1 and 3
:
Echoes are gradually displayed and afterglow remains on the screen longer as the
setting is increased.
Setting between 4 and 7
: Echoes are quickly displayed and af-
terglow remains on the screen longer as the setting is increased.
3.9.7
How to suppress sidelobes
False echoes produced by sidelobes may appear on the display depending on the dis-
tribution pattern of a school of fish and the positional relationship between it and a ma-
rine object (reef, etc.) and wake reverberation. To reduce these sidelobes, use
[Sidelobe Sup.] on the [TX/RX Setting] menu on the [V] tab.
Watch the echoes while adjusting the suppression. The setting range is -3 to 4 (0 is
OFF). The larger the setting, the more the sidelobe is suppressed. For greatest sup-
pression, use a negative setting (-3 to -1).
Note:
When a negative value is used, [TX/RX Mode] in the [Display Setting] menu is
automatically selected to [Alternative]. See page 7-3 for details.
For greater sidelobe suppression, use [Sidelobe Sup. B]. Note that You cannot oper-
ate [Sidelobe Direction 1] and [Sidelobe Direction 2].
Summary of Contents for FSV-85
Page 1: ...COLOR SCANNING SONAR FSV 85 OPERATOR S MANUAL www furuno com Model ...
Page 128: ...5 NUMERIC GRAPHIC DATA DISPLAY 5 4 This page is intentionally left blank ...
Page 158: ...8 RECORD RECALL OPERATION 8 8 This page is intentionally left blank ...
Page 172: ...9 MAINTENANCE TROUBLESHOOTING 9 14 This page is intentionally left blank ...
Page 178: ...APPENDIX 1 MENU TREE AP 6 This page is intentionally left blank ...
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