Furuno FSV25S, Руководство оператора

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2. HORIZONTAL MODE
2-10
4. Select [TVG Curve].
5. Click
S or T to select a suitable Log value.
The smaller the number, the gentler the gain changes over dis-
tance.
6. Click [Quit] on the setting box to close the box.
7. Long-push the
MENU/ESC key to close all menus.
The TVG is also used to suppress unwanted echoes (sea surface
reflections, cruising noise, etc.) on near ranges. If the selected curve does not provide
satisfactory results, see section 2.6.2 for how to adjust the near gain and far gain.
2.6.2 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 [H1] or [H2] 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 to set.
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.
10. Long-push the
MENU/ESC key to close all menus.
Note: When a school of fish is located on a long-range setting (about 800 meters)
and is approaching own ship, do as follows:
1) Adjust the tilt to keep the school of fish in the center of the sonar beam, name-
ly, the school of fish is displayed in strongest colors possible.
2) Confirm that the fish echo is displayed in the same color as it approaches.
3) If the color suddenly changes to weaker colors as the fish enters mid and near
distances from your vessel, the near gain is improperly set. Increase the near
gain setting to prevent weakening of colors.
Quit
Cancel
15Log
(040~Log)
Quit
Cancel
400m
(20~1600)