Installation Manual – Antenna & Feeder System Installation
BTS3802C & RRU
Chapter 2
Installing RF Antenna & Feeder System
2-26
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(1) Antenna lightning rod (2) Antenna (3) Fixing clip for the omnidirectional antenna
(4) Main supporting post (5) Road (6) Stiffener (7) Roof
Figure 2-27 Installing the omnidirectional antenna onto the support at the roof
2.9.2 Installation Requirements
The requirements of the isolation degree and the installation interval of the
omnidirectional antennas are the same as those for installing the omnidirectional
antennas on the tower platform. For details, refer to section 2.7.2 Installation
Requirements. Besides, the following points shall also be noted:
z Keep away from the defilades to avoid the signal blind area when installing
antennas.
z If there is no lightening rod on the top of the antenna support, install a lightening
rod separately and make sure the distance between omnidirectional antennas
and the lightening rod shall be not less than 2.5 m. Besides, the antennas shall
be in the lightning protection coverage 30
0
downward from the top of the
lightning rod.
z If there is lightening rod on the top of the antenna support, the distance for
hanging over the support shall be 1~1.5 m.
2.9.3 Installation Flow
The installation flow is shown in Figure 2-28.
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