Kongsberg Simrad SU90 Operator's Manual page 225

•
Ping-Ping Filter
The
Ping-Ping Filter
pings in order to remove unwanted noise and interference from the echo presentation.
•
Pulse Type
The function allows you to select the "shape" of the transmitted pulses
Pulse Type
("pings"). Different shapes have different qualities. Which pulse type to use depends
on the current environmental conditions, your range to the target(s) and the type and
speed of the target(s) you are observing.
•
Bandwidth
The function allows you to select the frequency range in the SU90 system
Bandwidth
transmissions ("pings").
•
Frequency
The function allows you set the centre frequency for the Hyperbolic
Frequency
Frequency Modulated (HFM) and Linear Frequency Modulated (LFM) transmissions
(pings), and the operating frequency for the Continuous Wave (CW) pings.
•
Horizontal TX Sector
In a horizontal swath the SU90 system transmits maximum horizontal opening angle
xxx. By means of the
to 360°. The function is only available in the Horizontal, Plane and Inspection views.
•
Vertical TX Sector
In a horizontal swath the SU90 system transmits with maximum vertical opening
angle xxx. By means of the
angle to 4.9 to 7°. The function is only available in the Vertical and Navigation views.
•
Range Projection
The distance to a target located anywhere in the water column can be measured in two
ways. This can either be the horizontal distance to the target (True), or along the tilt
angle (Slant). The
•
AGC (Automatic Gain Control)
The (Automatic Gain Control) function runs an automatic analysis of the echo
AGC
strength.
•
RCG (Reverberation Controlled Gain)
The (Reverberation Controlled Gain) function removes unwanted reverberation
RCG
from the bottom and or from the sea surface. This enhances the visibility of schools.
It may however also remove scattered fish from the presentation.
•
Bottom Filter Threshold
The SU90 system provides a bottom filter to reduce the sometimes powerful echo
from the seabed. This filter is useful if you try to find fish close to the bottom. Select
a
Bottom Filter Threshold
numerical increases the filter efficiency and reduces the bottom echo accordingly.
381291/D
analyses the historical information from previous consecutive
Horizontal Tx Sector
Vertical Tx Sector
function defines how this distance is measured.
Range Projection
value to control the "strength" of the filter. A higher
function, you can change this opening angle
function, you can change this opening
Menu system
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