Furuno FCR-2119-BB Operation Manual page 20

FOREWORD
Signal Processing Functions
This radar has the signal processing functions described in the table below. All signal processing
functions are set with the picture preset feature.
Signal processing function
Interference rejector
Echo stretch
Echo averaging
Noise rejector
Standards Used in this Manual
• Three types of Control Units are available: Radar Control Unit RCU-025 (radar controls with
trackball module), ECDIS Control Unit RCU-024 (alphabet keyboard, controls, trackball mod-
ule) and Trackball Control Unit RCU-026 (trackball module only). Unless noted otherwise, "Con-
trol Unit" refers to the RCU-025.
• The system can be operated with the controls of the Radar Control Unit, ECDIS Control Unit or
a trackball module. The descriptions in this manual use the trackball module.
• Unless noted otherwise, "click" means to push the left button on a trackball module.
• The keys and controls of the Radar Control Unit are shown in bold face; for example, the EN-
TER key.
• The buttons on the InstantAccess bar™, Status bar and menu items are shown in brackets; for
example, the [TUNE] button.
• Context-sensitive menus are available with many buttons, and boxes and objects. Right-click
an item to display the related context-sensitive menu.
• This radar is available in three types of specifications: IMO, A, or B. This manual provides the
descriptions for the B type, of which some functions are not available with the IMO or A type.
See the menu tree in Appendix 1 for function availability.
• The display colors mentioned in this manual are those with the color palette setting "Day-Gray".
xviii
Description
Suppress interference transmitted by other radars. Inter-
ference received simultaneously from many radars can
be difficult to reduce.
Enlarge target echoes, especially small echoes. Sup-
press interference, sea clutter and rain clutter before us-
ing echo stretch, to prevent the enlargement of unwanted
echoes.
The radar samples echoes with each scan. Targets that
show a large change with each scan are judged as clutter
and are reduced to display only echoes from legitimate
targets.
Reduce the white noise then improves the on-screen S/N
ratio by processing the weighted moving average filter for
the received echoes in the range direction. Use this func-
tion with caution. Weak target echoes may disappear
from the screen or the range resolution may worsen.
Section
section
2.7
section
2.8
section
2.9
section
2.10