381295/B
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Active menu
The
Active
menu offers parameters related to current views and data presentations shown
by the SN90.
How to open
Select the
Active
icon.
The icon is located under the
Main
menu. Select the
icon one more time to close the menu.
Description
Only brief descriptions are provided. For detailed
information about each function and dialog box, refer
to the SN90
Reference manual
or the context sensitive
on-line help.
Tip
If you do not need to use the menu system, you can hide
it. This allows more space for the SN90 presentation.
Use
Menu
on the top bar to hide or show the menu.
When the menu system is hidden, it appears temporarily on the left or right
hand side of the screen if you move the cursor to that position.
The choices in the this menu depends on which view in the SN90 presentation that is
currently "active". The menu may therefore change from one view to another. The name
of the currently active view is identified at the top of the menu. The screen capture
may not show you all the menu choices.
Note
Before you can change the settings related to a view, you must click inside the view to
activate it. The changes you make are by default only valid for the active view. Several of
the functions offer
Apply to All
. If you select
Apply to All
your setting is applied to all the
views in the current presentation mode.
•
TVG (Time Variable Gain)
When an acoustic pulse is sent through the water, it will gradually lose its energy.
The greater the distance between the transducer and the target(s), the greater the loss
of energy.
TVG
(Time Variable Gain) compensates for the loss of acoustic energy
due to geometric spread and absorption.
Содержание SN90
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