Simrad ARGUS FMCW 3G, User Manual

Page: 22 / 150

20 |
Basic operation | Argus Radar Operator Manual
Ref.
Control or
indicator
Description and function
9
SEA Anti-Sea Clutter by reducing the gain at minimum range gradually
returning to normal. Push to toggle Manual/Auto modes. The gain
varies with the distance according to a predetermined curve and in an
amount proportional to the setting. When the potentiometer is turned
fully counter clockwise, the gain is uniform over the entire screen.
10
RAIN Anti-Rain Clutter. Push to toggle Manual/Auto modes.
Large target masses will show only the immediate shoreline, thus,
permitting prominent targets on land to appear. Rain or snow clutter
can be reduced by the use of the potentiometer, and covered target
revealed. For more details, refer to “Rain” on page 66.
11
TUNE Push for 2 seconds to toggle between Manual/Auto modes. If manual,
keep it pressed to change the tuning. The tuning may be checked by
means of the numeric indicator on the screen, or directly by observing
a target echo. In the last case, the echo level should be slightly above
the noise level (not saturated). The tuning meter indication is displayed
on long pulse only. For more details, refer to “Tune” on page 64.
12 DISPLAY:
TM/RM Toggles True Motion and Relative Motion modes.
COURSE UP Momentary pushbutton used to select a stabilised Course Up presen-
tation. Press again in Course Up mode to enter a new course reference.
HEAD UP Momentary pushbutton used to select Head Up presentation (referred
to Heading Line).
NORTH UP Momentary pushbutton used to select North Up presentation
(referred to Gyro North). When the PPI is in True Motion mode the
presentation is automatically selected. For more details, refer to “North
Up” on page 62.
PRESS RESET Momentary pushbutton used to reset the position of own ship 180°
against the course.
OFF CENTRE Momentary pushbutton used to set the off-centered presentation
on the point under the cursor of the trackball (if the cursor is placed
inside the PPI).
For more details, refer to “PPI Centre/Off centre” on page 63.
CENTRE Momentary pushbutton used to set the PPI centered presentation.
Not active in True Motion presentation.
13
RANGE Two momentary pushbuttons used to select one of the 10 different
range scales, expressed in NM, and the relevant range rings for PPI
presentation.
With the + pushbutton it is possible to increase the range scale while
with the - pushbutton it is possible to decrease it. For further informa-
tion refer to “Range scale increase/decrease” on page 63.
14 TRACKING:
ACQ(UIRE) Momentary pushbutton used to acquire a radar target or to activate
an AIS target.
SEL(ECT) Momentary pushbutton used to display alphanumeric information
related to the selected radar target or AIS.
CANCEL Momentary pushbutton used to delete a tracked radar target or to
deactivate an AIS target.
15
TRACKBALL Positioning input device. Use the trackball to move the cursor on the
PPI (displayed as a cross) and on the system data area (Menus area,
displayed as a black arrow, except for the progress bars in which it is
possible to change the value, where it’s displayed as a double horizon-
tal thin arrow).