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Horizontal Axis function, page 253
•
Colour Scale
The colour scales are designed to reflect how strong the echoes are. The echo strength
is measured in decibels (dB). In the basic colour scale with 12 colours, each colour
represents a 3 dB step. This means that the entire scale covers 36 dB. The dynamic
range of the TV80 system is much larger. The
Colour Scale
parameters allow you to
change the lower limit of colour scale range to match the current echoes.
•
Range Marker
The
Range Marker
allows you to place a visual marker, which is a thick red horizontal
line, to help you visualize and analyze the echoes on the echogram view. The options
available depend on the values you defined in the
Range
and
Start Range
functions.
Range Marker function, page 254
•
Ping-Ping Filter
The
Ping-Ping Filter
analyses the historical information from previous consecutive
pings in order to remove unwanted noise and interference from the echo presentation.
Ping-Ping Filter function, page 254
Context sensitivity
This menu is only available if a TrawlEye view is “active”.
To activate a TrawlEye (or echogram) view, click in it.
Extras menu
The
Extras
menu is - in spite of its name and location - not a menu at all. This "menu"
opens a small view to monitor key operational parameters.
How to open
Select the
Extras
icon. The icon is located under the
Main
menu. Select the
icon one more time to close the menu.
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