Fixed radio systems - conformance testing - part 2 - 1 : point - to - multipoint equipment ; definitions and general requirements endorsement of the english version en 301126 - 2 - 1 v 1 . 1 . 1 2000 - 12 as german standard 固定无线电系统.合格试验.第2 - 1部分:点对多点设备.定
At information age , many different kinds of radio systems such as guide system 、 radar 、 communication system and navigation system , etc . , are often arranged in a local area 在信息时代的局部区域上,将部署大量不同类型的制导、雷达、通信及导航等无线电系统。
Fixed radio systems - conformance testing - part 1 : point - to - point equipment ; definitions , general requirements and test procedures endorsement of the english version en 301126 - 1 v 1 . 1 . 2 1999 - 09 as german standard 固定无线电系统.一致性检验.第1部分:点对点设备.定义
Fixed radio systems - conformance testing - part 3 - 2 : point - to - multipoint antennas - definitions , general requirements and test procedures endorsement of the english version en 301126 - 3 - 2 v1 . 2 . 1 2003 - 12 as german standard 固定无线电系统.合格试验.第3 - 2部分:点对多点天线.定
To the radio system on the land the frequency of electromagnetic wave is often between 300khz - 3000ghz , so the general model of transmission loss within this wave range are adopted 由于陆上无线电系统使用的电磁波频段常在300khz - 3000ghz之间,因此采用了此频段的通用电磁波传输损耗模型。
