210
(d) Multiple echo
Multiple echoes are developed by multiple reflections caused by a building or large vessels
that has large vertical surfaces. These echoes are spaced at an equal interval, with the one
that is closest to the own ship being the true echo.
(e) Radar interference
If there is a radar that uses the same frequency as that of the own ship near the own ship,
interferences caused by that radar appear on the PPI screen. These interferences appear as
clusters of spots of varying patterns. Since they do not occur at the same location with time,
they can easily be distinguished from true echoes.
Radar interferences can be reduced or eliminated by choosing "ON" from
"FUNCTION"-"IR".
【
Examples of radar interferences
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Summary of Contents for JMA-2343
Page 1: ...船舶用レーダ装置 JMA 2343 2344 MARINE RADAR EQUIPMENT 取扱説明書 INSTRUCTION MANUAL ...
Page 2: ......
Page 17: ...J JM MA A 2 23 34 43 3 2 23 34 44 4 取 取扱 扱説 説明 明書 書 日本語版 ...
Page 30: ...14 1 4 構造 第 1 1 図 NKE 249 空中線外形図 ...
Page 31: ...15 第 1 2 図 NKE 250 空中線外形図 ...
Page 32: ...16 第 1 3 図 NCD 4170 指示機外形図 ...
Page 115: ...99 9 2 3 装備ケーブルの接続 1 レドーム型空中線 NKE 249 ...
Page 116: ...100 ...
Page 117: ...101 2 回転型空中線 NKE 250 ...
Page 150: ...134 ...
Page 163: ...147 1 4 Configuration Fig 1 1 OUTLINE DRAWING OF SCANNER UNIT NKE 249 ...
Page 164: ...148 Fig 1 2 OUTLINE DRAWING OF SCANNER UNIT NKE 250 ...
Page 165: ...149 Fig 1 3 OUTLINE DRAWING OF DISPLAY UNIT NCD 4170 ...
Page 249: ...233 9 2 3 Connection of cables to be assembled 1 Radome scanner unit NKE 249 ...
Page 250: ...234 ...
Page 251: ...235 2 Rotary scanner unit NKE 250 ...
Page 285: ...付 付 図 図 A At tt ta ac ch he ed d F Fi ig gu ur re es s ...
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Page 308: ... 図 118 指示機回路ブロック図 Fig 118 BLOCK DIAGRAM OF DISPLAY UNIT ...
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