RA83/84/85/93/94/95 Series
Chapter 5
Operation Manual
Basic Operation
GAIN control
The GAIN control is used to vary the receiver gain. Turning the GAIN
control CW increases the receiver gain, and CCW decreases the
gain. Select AUTO1, AUTO2, or HARBOR by ADJUST/ADJUST
MENU, the automatic gain control will come into effect. The GAIN
MANUAL sign will change to GAIN AUTO on the screen. In this
mode, no manual control is available.
GAIN
SEA control
The SEA control is used to reduce the clutter echo returned from the
sea surface. Turning the control CW reduces the clutter and its effect
becomes the largest at a full CW position and minimum at a full
CCW position. Select AUTO1, AUTO2, or HARBOR by
ADJUST/ADJUST MENU, Harbor STC and the Automatic STC
functions will come into effect. The HARBOR STC that provides a
preset Anti-clutter sea effect, optimized for narrow areas. The
AUTO1 and AUTO2 STC provides a hands-free Anti-clutter sea
effect. The mode will display as AUTO1, AUTO2, HARBOR and SEA
MANUAL in sequence. In the HARBOR and Auto Anti-clutter Sea
modes, the manual control is disabled.
SEA
RAIN control
The RAIN control is used to reduce the clutter echo from rain or snow.
Turning the control CW reduces the clutter echo with maximum effect
at a full CW position and minimum at a full CCW position. Select
AUTO1 or AUTO2 by ADJUST/ADJUST MENU, the automatic
anti-rain clutter control will come into effect. The RAIN MANUAL sign
will change from RAIN to RAIN AUTO on the screen. In this mode, the
manual control is disabled.
RAIN
EBL ON/OFF key
The EBL SEL key is used to switch EBL control at every press of the
key. When the second EBL and Parallel Index Line (PI) feature are
selected, this key is used to select these markers in the following
cyclic order.
- First press: First EBL
- Second press: Second EBL
- Third press: Parallel Cursor
- Subsequent press of the key repeats the
above
steps.
EBL
SEL
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