Koden MDC-2900, Руководство по эксплуатации

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MDC-2900 Series Chapter 2 Basic operation (Panel)
0093129012-06 2-7
2.7 Adjust receiver gain (GAIN)
It is recommended to adjust [GAIN] in the top right side of the screen to have the evenly scattered
vague background noise with low intensity in the PPI.
Lower [GAIN] than required may result in overlooking small vessels and buoys.
Higher [GAIN] than required may result in difficult discrimination between small ships and densely
displayed high level background noise.
Under some situation, desired target object may be masked by side lobe of antenna directivity or false
echo by multi pass.
Refer to “
Principle of radar system
” (page6-1)
Lower [GAIN] until masked target echo can be recognized outside of the area where 2.8 “Reject sea
clutter (anti-SEA)” is effective.
However since lower [GAIN] tends to lose weak target echo, try to return the [GAIN] to original position
each time [GAIN] is changed to maintain target recognition. In the short distance area where anti-SEA
is effective, recognize target by adjusting MAN SEA.
When suppressing RAIN clutter (rain & snow), adjust GAIN-knob and RAIN-knob side by side.
Refer to “
Reject sea clutter (anti-SEA)
” (page2-8)
Refer to “
Reject rain/snow clutter (anti-RAIN)
” (page2-10)
[GAIN] state is displaying in the upper left of the screen.
1
Turn [GAIN] knob to clockwise to increase receiving gain.
Turn [GAIN] knob to counterclockwise to decrease the receiving gain.
Up
Down
Gain
Note:
• Decrease gain for shorter range and dense targets.
• Increase gain for long range targets and small target however take care in not using too much gain
and losing targets in the surrounding noise.
• Adjustment is not available while RAIN MODE is set to CFAR (Constant False Alarm Rate).
Refer to “
RAIN MODE
” (page4-50)
Own
ship
Land
Result picture after adjustment a [GAIN] knob
Own
ship
Land
Own
ship
Land