Japan Radio Co. JMA-5212-4, Руководство по обслуживанию на месте

Страница: 9 / 20

1-1
1.1. Overview
This equipment is marine radar equipment satisfying the IMO standard. The radar
equipment consists of a scanner unit that generates transmitting signals, transmits and
receives radio waves, and amplifies receiving signals, and a display system that displays
radar images after removing unwanted radio wave from the radar signals.
The radar equipment with which a magnetron tube is used as the transmitting tube
transmits 9.4 GHz (X band) pulse-modulated waves.
In addition to the basic radar functions, the radar equipment has functions for safe
navigation such as a radar trail display function, target tracking function
*1
, and AIS
information display function
*1
.
*1
The function is optional for radar equipment (not an IMO radar) which is designed for
fishing boats.
1.2. Scanner Unit
The scanner unit is an antenna that transmits a radar
signal into space, and sends the radar signal reflected
from a target into the equipment. The horizontal antenna
beam width is small for identifying the target bearing, and
the scanner unit has a rotating mechanism for detection in
the entire surrounding area.
Two types of scanner units are provided for this
equipment, and their usage is as follows:
Ԙ
X band (10 kW) scanner unit: Compact and light
weight
ԙ
X band (25 kW) scanner unit: High resolution, and high sensitivity
Figure 1.2 X-25 kW scanner unit
Figure 1.1 X-10kW scanner unit