Kongsberg Simrad ST90, Reference Manual

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Related topics
Controlling the gain and range settings, page 94
Defining the user-selected features on the Operating Panel, page 174
Functions and dialog boxes, page 416
Main menu; Functions and dialog boxes, page 417
Gain function
The purpose of the
Gain
function is to adjust the echo level in the display presentations. By
adjusting the gain you can control how much amplification the ST90 system applies to the
received echoes. The setting is by default only applied to the active view.
How to open
This function is opened from the
Main
menu.
Description
You can compare this gain setting with the volume control on your car radio. When the gain
is increased, the echoes will appear stronger. Weak echoes will be easier to see. However,
since you also increase the acoustic noise in the reception, the echo presentations will also
show this noise. Too much gain may therefore "distort" the presentation.
The setting is by default only applied to the active view. It is identified with a thick border.
Tip
You may wish to adjust the gain on all the views of the same type. To do this, click the middle
of the
Gain
button to open it, and select
Apply to all
.
Do not confuse this
Gain
setting with the
TVG
(Time Variable Gain) setting.
Details
Gain
This setting controls the gain applied to the currently selected ("active") view.
Select either side of the button to choose a value. Select the middle of the button to
open it. If you have a keyboard connected to the ST90 system, type the requested
value. You can also change the value by selecting - and holding - the middle of
the button, and move the cursor sideways. Drag the cursor sideways to increase or
decrease the value. Release the mouse button when requested value is shown.
Simrad ST90 Reference Manual