Reverberation; Echo Average; How To Adjust Beam Width - Furuno FSV-25S Operator's Manual

3. VERTICAL MODE
3.9.5

Reverberation

You can reduce the strength of reverberation from sea-surface, sea-bottom and plank-
ton layer, with [Reverberation] on the [TX/RX Setting] ([V] 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.
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 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.
3.10

How to Adjust Beam Width

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 [V] tab, then click [Beam Width].
4. Click [Hor. Beam Width] or [Ver. Beam Width] as appropriate.
5. Click
width.
6. Click [Quit] on the setting box to close the box.
7. Long-push the MENU/ESC key to close all menus.
3-12
TX/RX Setting
H1 P1
H2 P1
TX Interval
TX Pulse Length
TX Power

Reverberation

Freq Shift
Hor. Beam Width
Ver. Beam Width
or to set the beamwidth. The higher the setting the sharper the beam-
Quit
V P1
: 9
: 9
: 9
: 0
: Mid
: 4
: 4