Furuno FSV25S, Operator'S Manual

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2. HORIZONTAL MODE
2-16
2.9.6 Reverberation
You can reduce the strength of reverberation from sea-surface, sea-bottom and plank-
ton layer, with [Reverberation] on the [TX/RX Setting] ([H1] or [H2] tab). The setting
range is 0 to 3. The reverberation setting is automatically set to “0” when the range is
100 m or less. The larger the setting, the greater the reduction in reverberation. Select
a value that reduces reverberation while showing echo signals clearly.
2.9.7 Echo average
[Echo Average] (H1 or H2 tab) on the [Picture Setting] menu 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 to 11.
Setting between 1 and 7 : Echoes are gradually displayed and afterglow remains on
the screen longer as the setting is increased.
Setting between 8 and 11 : Echoes are quickly displayed and afterglow remains on
the screen longer as the setting is increased.
2.10 How to Adjust Beamwidth
The width of the horizontal beam can be adjusted from the [Beam Width] menu.
1. Press the MENU/ESC key to show the main menu.
2. Click [TX/RX Setting].
3. Press the H/V/S key to select the [H1] or [H2] tab.
4. Click [Hor. Beam Width] or [Ver. Beam Width].
5. Click
S (raise setting) or T (lower setting) to adjust the beamwidth. The setting
range is 0 to 4. The higher the setting the sharper the beamwidth.
6. Click [Quit] on the setting box to close the box.
7. Long-push the
MENU/ESC key to close all menus.
TX/RX Setting Quit
H1 P1
H2 P1 V P1
TX Interval : 9
TX Pulse Length : 9
TX Power : 9
Reverberation : 0
Freq Shift : Mid
Hor. Beam Width : 4
Ver. Beam Width : 4