Note
Scattered fish can be perceived as reverberation. The RCG
function should therefore be used with care if scattered schools
are to be detected.
1
Click the
Horizontal
or
Vertical
tab to open the respective
menu.
2
Click the
RCG
button to adjust the parameter.
• Click the left side of the button to decrease the parameter
value.
• Click the right side of the button to increase the
parameter value.
• Click the middle of the button to open the parameter
dialogue.
How to control the TVG
The
TVG
(Time Varied Gain) controls the gain in the signal
amplifier. The gain is weakest just after the ping, and increases
in accordance with time (and therefore range). A number of
standard gain curves are available, as well as
Off
and
Auto
.
By using TVG, the gain is adjusted in such way that a school
of fish with a certain size and density will be presented with
approximately the same strength on the screen in any position
inside the regulated TVG range.
1
Click the
Horizontal
or
Vertical
tab to open the respective
menu.
2
Click the
TVG
button to adjust the parameter.
• Click the left side of the button to decrease the parameter
value.
• Click the right side of the button to increase the
parameter value.
• Click the middle of the button to open the parameter
dialogue.
How to control the Display gain
The
Display Gain
increases or decreases the presentation of the
echo colours on the display.
1
Click the
Display
tab to open the menu.
2
Click the
Display gain
button to adjust the parameter.
• Click the left side of the button to decrease the parameter
value.
• Click the right side of the button to increase the
parameter value.
850-165261/A
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Summary of Contents for Simrad SP90 Series
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