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大锅天线安装
GPS天线安装规范
一． GPS 天线安装位置选择 * CUSTOMER SUPPLIED SKY A 2 m 90? PROTECTE DCIRCULAR CONE ANTENN A A * LIGHTNINGRO D * MAST 30? OBSTRUCTIO N(BUILDING orSITE RELIEF) 2m FROM METALLIC OBJECTGREATER THAN 20cm IN ANY DIMENSION * GROUNDING CONDUCTOR * HOUSING 1 EMP PROTECTOR PROTECTED AREA UNPROTECTED AREA(SHORT DISTANCE) 2 CABLE LENGTH = + 1 2 GPS RECEIVER UNIT * 1 - 1/2 " COPPER STRAP5m LONG * GROUND
