Chapter
8
Installation
of Primary Antenna Feeder System
8-9
8.4.4 Installing and Adjusting Directional Antenna
Note:
The antennae of different providers require different installation modes. This
section takes the installation of the KATHREIN antenna as an example. Before
the installation, read the installation manual delivered with the antenna
carefully.
Install a directional antenna by the following steps:
1. Fastening the directional antenna onto the pole
Fasten the fastener of the directional antenna with the pole. Do not screw the
screws too tight or too loosely. If they are too loose, the antenna might fall off; if
they are too tight, it is inconvenient to adjust the azimuth angle and pitch angle
of the antenna later.
2. Adjusting the azimuth angle of the antenna
1
）
Measure the azimuth angle of the antenna with a compass. Then check the
engineering design drawing for the antenna direction.
2
）
Adjust the orientation of the antenna by twisting it slightly, as shown in Fig.
8.4-1. At the same time, measure the orientation of the antenna with the compass.
Keep adjusting until the deviation is within the design requirement, that is, less
than or equal to 5° generally.
3
）
After the adjustment, fasten the fastener 738516 tight.
3. Adjusting the pitch angle of the antenna
1
）
Adjust the bubble inclinometer to the angle as required in the engineering
design.
2
）
Adjust the pitch angle of the antenna slightly until the bubble of the inclinometer
is located in the middle when you measure the pitch angle with it, as shown in
Fig. 8.4-3.
3
）
After the adjustment, fasten the fastener 737974 tight.
