Furuno FSV-2S, Руководство оператора

Страница: 41 / 162

2. HORIZONTAL MODE
2-11
2.7 How to Adjust Strong, Weak Echoes
2.7.1 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 [H1] or [H2].
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.
[AGC Near]: Suppress gain in area closer than the [AGC Distance] setting.
[AGC Far]: Suppress gain in area that is beyond the [AGC Distance] setting.
8. Click S or T to change the setting.
The setting range is 0.0 - 10.0. The larger the figure the greater the degree of sup-
pression. However, too high a setting may erase weak echoes.
9. Click [Quit] on the setting box to close the box.
10. Long-push the
MENU/ESC key to close all menus.
Quit
Cancel
20m
(20~5000)
Quit
Cancel
2
(0.0~10.0)