3. VERTICAL MODE
3-8
3.7.2
Change near gain, far gain
This sonar lets you adjust near gain and far gain separately.
1. Press the
MENU/ESC
key to open the main menu.
2. Click [Gain Setting].
3. Press the
H/V/S
key to select the [V] tab.
4. Click [Near Gain Distance] or [Far Gain Distance].
5. Click
S
or
T
to select a suitable value.
6. Click [Quit].
7. Click [Near Gain] or [Far Gain].
[Near Gain]
: Adjust sensitivity in area closer than [Near Gain Distance].
[Far Gain]
: Adjust sensitivity in area further than [Far Gain Distance].
8. Click
S
or
T
as appropriate then push the left button.
The setting range is 0.0 to 10.0. Setting” 5” does not correct the gain. Use a setting
lower than 4 to lower the gain, or use a setting higher than 5 to raise the gain.
9. Click [Quit] on the setting box to close the box.
10. Long-push the
MENU/ESC
key to close all menus.
3.8
How to Adjust Strong, Weak Echoes
3.8.1
AGC Near, AGC Far, AGC Distance
The AGC function automatically reduces the receiver gain only against strong echoes
such as the bottom or a large school of fish. Since the AGC function does not affect
weak echoes, a small school of fish becomes easier to detect. The FSV-25 has three
types of AGC settings, [AGC Distance], [AGC Near], and [AGC Far]. Adjust them so
that the AGC works only on bottom reflections. Do not set it too high; weak echoes
may be missed.
1. Press the
MENU/ESC
key to show the main menu.
2. Click [Gain Setting].
3. Press the
H/V/S
key to select the [V] tab.
4. Click [AGC Distance] to show the setting box.
5. Click
S
or
T
to change the setting.
The setting range is 20 - 5000 m, in 20 m increments.
6. Click [Quit] on the setting box to close the box.
7. Click [AGC Near] or [AGC Far] to show the setting box.
Quit
Cancel
400m
(20~1600)
Quit
Cancel
20m
(20~5000)
Quit
Cancel
2
(0.0~10.0)
Summary of Contents for FSV-2S
Page 1: ...COLOR SCANNING SONAR FSV 25 FSV 25S OPERATOR S MANUAL www furuno com Model ...
Page 14: ...SYSTEM CONFIGURATION xii This page is intentionally left blank ...
Page 74: ...2 HORIZONTAL MODE 2 44 This page is intentionally left blank ...
Page 92: ...4 NUMERIC GRAPHIC DATA DISPLAY 4 4 This page is intentionally left blank ...