1.
GENERAL
1.1
Introduction
The RA770UA
Marine
Radar
is
a
marine navigational
pulse radar with
4kW
peak
power
output for small and
medium
-
sized vessels. The Display
Unit
uses a 10
-
inch
CRT
to display monochrome picture images
at
four different
brightness levels.
recently developed by Anritsu Corporation.
Many versatile advanced technologies, such as,a
microcomputer,
an
LSI
exclusively designed for video
signal processing, high
-
integrated
LSIs,
have been
incorporated
in
the
radar
circuitry.
intensities of signals reflected from targets can
be
displayed at four different brightness levels.
In addition, various automatic functions, video image
expansion, off
-
centering, plotting, electronic cursor, and
offset are provided.
a. High Resolution and Sharp Picture
ranges. This unique outstanding feature has been achieved
by using a
"
clean picture
"
circuit, that
is
a high
resolution circuit developed by Anritsu.
b. Automatic Sea Clutter Suppression and Auto Gain
Control
(AUTO)
In
addition to having conventional sea clutter
suppression,
this
radar has a newly
-
developed automatic
sea clutter suppressor.
has an automatic gain control for easy operation.
:.
Automatic Tuning
eliminates the possibility of miss
-
tuning or function
lowering of gain.
1.
Rain, Snow Clutter Suppression
(FTC)
newly
-
developed FTC
circuit.
As
a result, the visiblity of
targets has been greatly improved.
It
is
one
of
a
series
of
digital marine-radars
1.2
Features
As
a
result,
radar video
images
can be stored and the
Picture resolution
is
excellent at short and medium
And not only a sea
clutter
suppressor, this new radar
To maintain optimum gain at
all
times, auto
-
tuning
Echoes from rain
or
snow are suppressed by Anritsu's
:.
Off
-
Centering
Your
ship's position in the picture can be off-
centered from the screen
center.
The off
-
centered position
can be set to either position of
60%
forward
or
60%
backward
.
size.
This results
in
the effective
use
of the display
:.
Electronic Cursors
:
Markers
(VRMs)
(i)
This radar
can
display two
EBLs
and two
VRMs.
Electronic Bearing Lines
(EBLs)
and Variable Range
