Simrad SH90 - REV A, Руководство оператора

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Simrad SH90
Menu buttons
•
Range
: Select the range for the horizontal presentation.
•
Tilt
: Select the sonar beam’s vertical angle.
•
Bearing
: This button controls the direction of the white
bearing line on your sonar picture. This line may be used to
control the direction of the vertical slice.
•
Gain
: This setting controls the amplification of the received
echoes in the horizontal presentation. If you activate the
AGC
(Automatic Gain Control) function, this gain setting is
influenced.
•
Pulse Form
: Use this function to select the form of the
transmitted pulse. This could either be FM (Frequency
modulation) with different pulse lengths, or CW with different
pulse lengths.
•
TX Power
: This button controls the transmission power.
•
Beam
: This button allows you to choose vertical beamwidth
in the horizontal presentation.
•
TVG
: Time Varied Gain. This function will automatically
adjust the gain in the sonar to compensate for geometric
spread and absorption. Note that the TVG will only work
within the first 1000 meters.
•
AGC
: Automatic Gain Control. This function will
automatically reduce the gain if you experience reverberation
and noise, or increase it if the conditions permit it. Using the
AGC will ensure best possible signal processing.
•
RCG
: Reverberation Controlled Gain. This function will
automatically remove unwanted reverberation from the
bottom or from the sea surface. It may however also remove
scattered fish.
•
Noise Filter
: This filter can be used to minimize the
interference from other acoustic systems (sonars and echo
sounders) on your own and other vessels. It will also suppress
noise from your propellers, and from other similar noise
sources.
•
PP Filter
: The Ping-to-Ping filter will only show you the
echoes if they are still present after several consecutive pings
(2, 4 or 8). This function will provide you with a more stable
echo presentation, as spurious echoes will be suppressed.
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