Simrad SH90 - REV A, Operator'S Manual

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Simrad SH90
Click the left or right side of the
AGC
button to decrease
or increase the setting, or the middle of the button to open
the parameter dialog.
For more information about this parameter, see What is AGC?
on page 68.
How to adjust the RCG
The
RCG
(Reverberation Controlled Gain) regulates the receiver
gain individually for each of the receiving beams. If you select
a small or medium value, echoes from propellers, surface and
bottom reverberations will be suppressed, while target echoes
will remain in view. If you select a strong filter setting, it will
remove the bottom, while echoes on the bottom will be presented.
Note
Scattered fish can be perceived as reverberation. The RCG
function must therefore be used with care if you wish to find
scattered schools.
1
Click the
Horizontal
or
Vertical
tab to open the respective
menu.
2 Click the
RCG
button to adjust the parameter.
Click the left or right side of the
RCG
button to decrease
or increase the setting, or the middle of the button to open
the parameter dialog.
For more information about this parameter, see What is RCG?
on page 70.
How to adjust 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 . By using TVG,
the gain is adjusted in such way that a school of fish will be
presented with approximately the same strength on the screen in
any position inside the regulated TVG range of 1000 meters.
1
Click the
Horizontal
or
Vertical
tab to open the respective
menu.
2 Click
TVG
to adjust the parameter.
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