Furuno FSV-85, Operator'S Manual

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2. HORIZONTAL MODE
2-10
3. Press the H/V/S key to select [H1] or [H2] tab.
4. Select [Sel TVG Curve] then left-click.
5. Select a TVG curve then push the left-click button.
The smaller the number, the gentler the gain change over distance.
6. Select [Quit] on the setting box then push the left-click button.
7. Long-press 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,
try to adjust [TVG-Near], [TVG-Medium] or [TVG-Far], as shown below.
TVG distance and setting
This sonar has three TVG
functions, NEAR, MEDIUM
and FAR, and they mainly
compensate for propagation
loss on short, middle and long
ranges respectively, centered
at the ranges shown below.
The higher the TVG setting,
the greater the amplification
of echoes.
1. Press the MENU/ESC key then push the left-click button to open the main menu.
2. Select [Gain Setting] then push the left-click button.
3. Press the
H/V/S key to select [H1] or [H2] tab.
Approx. 100 m
Near
Far
Med
Approx. 400 m
Approx. 800 m