21
If there are parapets around the building top and the parapet height is less than 1200 mm
(47.24 in), affix one point of the pole to the parapet with one expansion bolt and the other
point to the building top surface with another expansion bolt, and affix the directional
outdoor antenna onto the pole with pole-mounting brackets (see the diagram on the
right in Figure 17
If there is no parapet around the building top, first use expansion bolts to secure the pole
vertically on the building top surface or cement pier, and then use pole-mounting
brackets to affix the directional outdoor antenna onto the pole (see Figure 18
Installing an omni outdoor antenna on a pole
When installing an omni outdoor antenna on a pole, observe the following precautions:
The pole should be 50 to 80 mm (1.97 to 3.15 in) in diameter. Usually, a steel pole with a
diameter of 60 mm (1.97 in) is used
The top of the pole should be flush with the upper clamp (see Figure 19
The antenna height should meet the signal coverage requirement and the tip of the
antenna should fall within the 45° protection angle of the lightning rod.
Usually, no lightning rod is directly soldered onto an omni antenna pole (no metal object is
allowed within one meter in the horizontal direction of the omni antenna). Instead, a lightning
rod is set on a separate pole between two omni antenna poles and the lightning rod is high
enough to keep the tip of omni antennas within the protection angle.
Figure 19
Install omni antennas
If you cannot install the lightning rod on a separate pole due to environmental limitations, use
the installation method shown in Figure 20 In this case, the lightning rod pole should be at least
one meter away from the omni antenna pole.
45°
45°
Omni outdoor antenna
Clamp
Antenna pole
Lightning
protection angle
Lightning rod
