Icom MR-1220 Instruction Manual - Page 13

Adjusting the radar reception, Adjusting the gain, Reducing the sea clutter

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Basic operation 2 Adjusting the radar reception The following is typical operation examples that may hinder radar reception (sea clutter, precipitation interference and echoes from other radar). DDAdjusting the gain The control adjusts the sensitivity of the receiving signal. The increased gain may increase screen noise. zz Rotate the GAIN / control until the noise disappears. DDReducing the sea clutter You can eliminates echoes from waves at close range. Reduce the receiver gain for close objects within a radius of approximately 8 NM to eliminate sea clutter. zz Rotate the SEA / control until the echoes from sea waves disappear. •• The SEA icon is displayed in the upper left corner of the screen when the SEA function is active. Echoes from the sea waves zz Rotate the SEA / control fully clockwise to activate the automatic control. •• "AUTO" is displayed below the SEA icon when the automatic control is active. NOTE: •• The SEA / control reduces the receiver sensitivity of objects within approximately 8 NM. Therefore close targets are blanked if the SEA setting is set to too high. •• While the automatic SEA function is activated, small objects may not be displayed on the screen due to strong echoes from rain or islands within 1 NM. DDReducing the rain clutter 1 The rain clutter control eliminates echoes from rain, snow, fog, and so on. 2 zz Rotate the RAIN / control fully counterclockwise to deactivate the control function. 3 LLThe RAIN icon disappears. 4 5 6 7 8 Small echoes Adjust RAIN control 9 10 DDInterference Reduction function Radar interference may be displayed when another 11 vessel's radar is operating on the same frequency band in close proximity. The Interference Reduction 12 (IR) function can eliminate this type of interference. 13 [MENU]/[ ] > Video > Interference Reduction (IR) Function 14 Select 1, 2, or OFF that you can get the clearest view. "IR1" or "IR2" indicator is displayed in the upper right 15 of the screen, when the function is activated. 16 17 18 19 20 Radar interference 21 With IR function ON 8

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8
BASIC OPERATION
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
The following is typical operation examples that
may hinder radar reception (sea clutter, precipitation
interference and echoes from other radar).
D
Adjusting the gain
The control adjusts the sensitivity of the receiving
signal. The increased gain may increase screen noise.
z
Rotate the
GAIN
/
control until the noise
disappears.
D
Reducing the sea clutter
You can eliminates echoes from waves at close range.
Reduce the receiver gain for close objects within a
radius of approximately 8 NM to eliminate sea clutter.
z
Rotate the
SEA
/
control until the echoes
from sea waves disappear.
•
The SEA icon
is displayed in the upper left corner
of the screen when the SEA function is active.
Echoes from the sea waves
z
Rotate the
SEA
/
control fully clockwise
to activate the automatic control.
•
“AUTO” is displayed below the SEA icon
when the
automatic control is active.
NOTE:
• The
SEA
/
control reduces the receiver
sensitivity of objects within approximately 8 NM.
Therefore close targets are blanked if the SEA
setting is set to too high.
•
While the automatic SEA function is activated,
small objects may not be displayed on the screen
due to strong echoes from rain or islands within
1 NM.
D
Reducing the rain clutter
The rain clutter control eliminates echoes from rain,
snow, fog, and so on.
z
Rotate the
RAIN
/
control fully
counterclockwise to deactivate the control function.
L
The RAIN icon
disappears.
Adjust RAIN control
Small echoes
D
Interference Reduction function
Radar interference may be displayed
when another
vessel’s radar is operating on the same frequency
band in close proximity. The Interference Reduction
(IR) function can eliminate this type of interference.
[MENU]/[
] > Video >
Interference Reduction
(IR) Function
Select 1, 2, or OFF that you can get the clearest view.
“IR1” or “IR2” indicator is displayed in the upper right
of the screen, when the function is activated.
With IR function ON
Radar interference
Adjusting the radar reception