| 摘要 |
A radar system for a marine vessel has an antenna unit mounted at the top of a mast and a radar display at a remote location. The antenna unit comprises an outer housing containing: an antenna, a motor and gearbox to rotate the antenna to scan in azimuth, a transceiver connected to receive radar signals from the antenna and an analogue-to-digital converter. Digital signals from the converter are supplied down the mast via cabling, which extends to a processor adjacent the display. The processor converts the digital signals into a form for display.
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