Garmin AQUAMAP 10x2 Series, Руководство пользователя, Страница: 57 / 112

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AQUAMAP™ 10x2/12x2 SERIES
of sound, so that the echoes from fish schools of the same size are
displayed in the same color. Avoid excessive TVG; weak echoes may not
be displayed. The TVG is also useful for reducing surface noise. TVG is
intended to compensate for the fact that close-in returns provide a louder
echo than further-away ones by using a lower gain level in the period
immediately after the sounder stops transmitting its ping (echoes from
nearby objects) and then ramping up the gain level over time as the ping
travels into deeper water, attenuating as it goes.
Adjusts the appearance of returns to compensate for weakened sonar
signals in deeper water, and reduces the appearance of noise near the
surface. When the value of this setting is increased, the colors associated
with low-level noise and fish targets appear more consistent through
various water depths. The ideal end result of using TVG appropriately is
that if you increase Gain until you see a lot of clutter on the screen, the
amount of clutter should spread evenly throughout the depth of the water
column.
TVG Setting
Off Low Medium High
Color Filter : Shows or hides individual colors to customize the appearance of
sonar returns.
Color Bar : Shows or hides the color legend.
Sonar Appearance Settings
From an applicable sonar view, select MENU > Sonar Setup / ClearVü
Setup / SideVü Setup > Appearance .
Color Scheme : Sets the color palette.
Color Gain : Adjusts the intensity of colors shown on the screen. You
can select a higher color gain value to see targets higher in the water
column. A higher color gain value also allow you to differentiate low
intensity returns higher in the water column, but this causes a loss in the
differentiation of the returns at the bottom. You can select a lower color
gain value when targets are near the bottom, to help you distinguish
between targets and high intensity returns such as sand, rock, and mud.
Overlay Data : Sets the data shown on the sonar screen.
A-Scope : Displays a vertical flasher along the right side of the screen that
shows instantaneously the range to targets along a scale.
Depth Line : Shows a quick-reference depth line.
Whiteline : Highlights the strongest signal from the bottom to help define the
hardness or softness of the signal.
Pic. Advance : Allows the sonar picture to advance faster by drawing more
than one column of data on the screen for each column of sounder data
received. This is especially helpful when you are using the sounder in
deep water, because the sonar signal takes longer to travel to the water
bottom and back to the transducer.
The 1/1 setting draws one column of information on the screen per
sounder return. The 2/1 setting draws two columns of information on the
screen per sounder return, and so on for the 4/1 and 8/1 settings.
Fish Symbols : Shows the position and size of schools of fish using symbols
and numbers.
Turning On the A-Scope
NOTE:
This feature is available in the Traditional sonar views.