Description
The
Colour scale
field visualizes the mapping of echo strength into
one out of 12 colours, light blue for weak signals and dark brown for
strong signals. Basically, each discrete colour represents a 3 dB range
of echo signal strength implying that the next colour is selected every
time the echo strength doubles. However, as the number of colours
can differ, and dedicated colour schemes can be used, this is subject
to change with specific settings. By changing the
Gain 20Log
(or
Gain
40Log
), the limits of the colour scale are changed.
A high numeric TVG value (= high gain) displays weak echo signals
properly while the stronger signals saturate into dark brown colour.
A low numeric value displays strong echo signals properly. Weak
signals below the lower limit of the colour scale are not displayed
(the display background colour is used).
Tip
If you place the cursor inside the view, a small yellow label will appear to give you
a detailed read-out of certain information. The
Tooltip
dialog box defines which
information that will be shown.
If you press the right mouse button with the cursor position within this field, a dedicated
short-cut menu will appear.
Related topics
•
on page 102
Depth field
The
Depth
field is located on the top of each channel view, and on top of the
Swath
view.
To open the field, click on the grey border line and drag it down.
Description
The
Depth
field displays the current depth.
Tip
If you click the right mouse button with the cursor position within this view, a dedicated
short-cut menu will appear.
Related topics
•
on page 99
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