442700/A
611
Bottom TVG
Use this option to select up a specific Time Variable Gain (TVG) compensation for the
bottom detection.
The CS90 system allows you to use different TVG compensation for the echoes from
the water column than from the bottom. By making the bottom echoes individually
adjustable, you can fine tune the presentation from the bottom to investigate the
bottom type and conditions. The
Bottom TVG
adjustment has no effect on fish close
to the bottom.
If you set
Bottom TVG
to
None
there will be no gain change in the TVG at the detected
bottom depth. The TVG selected for the echogram is then used for the entire depth
range.
User TVG
If you are very familiar with the TVG principles, you can choose to use your own
curve. In order to use the chosen curve, the TVG mode must be set to
User
. You
can also select TVG setting with the
TVG
function. The
TVG
(Time Variable Gain)
function is located on the
Active
menu.
Related topics
Functions and dialog boxes, page 413
Active menu; Functions and dialog boxes, page 461
Echogram dialog box, page 487
Horizontal Axis page
The echo presentations in the
Inspection
views resemble the echograms you see on an echo
sounder. The echoes travels from right towards left across the echogram presentation.
Use the
Horizontal Axis
to choose the horizontal scale of the echogram. This controls the
"speed" of the echoes.
How to open
This page is located in the
Echogram
dialog box. The
Echogram
dialog box is located on the
Active
menu. The dialog box is only available when an
Inspection
view is active.
Summary of Contents for Simrad CS90
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