1.2 Display unit
2
1.2 Display unit
TX trigger pulse is generated by gate array, U79 and sent to the scanner unit. The video signal
from the scanner unit is A/D converted and sampled by gate array, U78. Echoes in each sweep
are stored on the V-RAM via gate array, U79. Upon receiving the heading pulse, the stored data
are output to the LCD in four gradations, according to echo strength.
Fig.1-2 Block Diagram of Display Unit
LCD
HD/BP
DU Board
(03P9320)
TX trigger
Video signal
Scanner unit
Navaid
PNL Board
03P9330
Ship’s mains
Power Supply
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