54
386619/C
•
Pulse Type
The
Pulse Type
function allows you to select the "shape" of the transmitted pulses
("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
Bandwidth
function allows you to select the frequency range in the Hyperbolic
Frequency Modulated (HFM) transmissions.
•
Frequency
The
Frequency
function allows you set the centre frequency for the Hyperbolic 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
Horizontal Tx Sector
function, you can change this
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
function, you can change this opening angle to N/A. 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
Range Projection
function defines how this distance is measured.
•
AGC (Automatic Gain Control)
The
AGC
(Automatic Gain Control) function runs an automatic analysis of the echo
strength.
•
RCG (Reverberation Controlled Gain)
The
RCG
(Reverberation Controlled Gain) function removes unwanted reverberation
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
Bottom
Filter Threshold
value to control the "strength" of the filter. A higher numerical increases
the filter efficiency and reduces the bottom echo accordingly.
Simrad SX90 Quick Start Guide
Summary of Contents for SX90 - DATASHEET FOR NAVAL AND COAST GUARD REV A
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Page 6: ...4 386619 C Visual Objects menu 60 Cosmetics menu 63 Shortcut menus 65 Simrad SX90...
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