Huawei BTS3802C - Figure 2-21 Relationship between the Azimuth Angle of the Directional Antenna and the Sector

Installation Manual – Antenna & Feeder System Installation
BTS3802C & RRU
Chapter 2
Installing RF Antenna & Feeder System
2-22
3) Adjust the azimuth angle of the antenna. Determine the azimuth angle using a
compass according to the engineering design documents. Normally, sector 1 is
in the north. Sector 2 lies in the clockwise 120° direction and sector 3 in the next
clockwise 120° direction, as shown in Figure 2-21. By turning the antenna slightly,
the personnel can adjust the azimuth angle until it satisfies the design index.
Usually, the error of the azimuth angel shall be [5°.
Sector 1
North
120°
120 °
Sector 2
Sector 3
Figure 2-21
Relationship between the azimuth angle of the directional antenna and the sector
4) Tighten the lower fixing clip of the antenna until it cannot be moved by any hand
pull or push.
5) Adjust the pitch angle of the antenna. If the mounting hole of each directional
antenna has its corresponding pitch angle, the antenna can be installed directly
into the mounting hole as shown in Figure 2-22 and Figure 2-23. However, the
supporting post shall be kept perpendicular to the ground during the installation.
For other antennas, the pitch angles are adjusted in the following method:
z Decide the pitch angle of the antenna using the angle display, as shown in
Figure 2-24 and Figure 2-25.
z By turning the antenna slightly, adjust the pitch angle until it satisfies the
engineering design index, as shown in Figure 2-26. Usually, the error of the pitch
angle is required to be [ 0.5°.
z Tighten the upper fixing clip of the antenna until it cannot be moved by any hand
pull or push.