Simrad SX90 Quick Start Manual page 56

Simrad SX90 Quick Start Guide
•
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 Hyperbolic
Bandwidth
Frequency Modulated (HFM) transmissions.
•
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
The SX90 transmits in a swath with maximum horizontal opening angle 360°
omnidirectional. By means of the
opening angle to 180, 120, 90, 60 or 30°. The function is only available in the Horizontal,
Plane and Inspection views.
•
Vertical TX Sector
The SX90 transmits in a swath with maximum vertical opening angle 90°. By means of
the
Vertical Tx Sector
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
Range Projection
•
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 SX90 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
value to control the "strength" of the filter. A higher numerical increases
Filter Threshold
the filter efficiency and reduces the bottom echo accordingly.
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Horizontal Tx Sector
function, you can change this opening angle to N/A. The function is
function defines how this distance is measured.
function, you can change this
Bottom
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