1.2 Scanner Unit
2
1.2 Scanner Unit
The scanner unit mainly consists of INT Board (03P9271), IF AMP Board (03P9269), MIC (RU-
9458), radiator, antenna motor, reed switch which generates HD signal, magnetron, and MD
Board
(03P9270).
Power to Scanner Unit
The ship’s mains is directly supplied to the scanner unit, where various voltages are made.
Therefore, if the antenna cable length of 12VDC set is 20m or more, scanner rotation may
be abnormal due to voltage drop. If the antenna cable is more than 20m, modify the unit
to 24VDC set.
Antenna Cable
Both the scanner unit and the display unit have a CPU. They communicate with each other on
two lines, “COM (HOT)” and “COM (COLD)”. The result: the number of lines in the cable was
reduced.
Figure 1-2 Antenna Cable
Conventional radars MODEL 1622
COM (HOT) 1
COM (COLD) 2
BP/HD 3
TRIGGER 4
VIDEO 5
GND 6
S.M. (HOT) 7
S.M. (COLD) 8
GND 9
SHIELD 10
1 GAIN
2 STC
3 TUNE
4 TUN.IND
5 MOTOR(+)
6 MOTOR(
-
)
7BP
8HD
9 P/L-A
10 P/L-B
11 TRIGGER
12 VIDEO
13 GND
14 +12V
15 -12V
16 GND
17 SHIELD
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