Pole Mounting
The 27010902 antenna is mounted on a pole. The wall thickness of the pole should be no less than 2.5 mm. A 50 mm diameter pole made of round steel is usually used.
- The antenna must be installed in a place far away from high-voltage power supplies or radio signal interference sources (such as other APs or antennas).
- Do not install antennas in bad weather conditions, for example, during rain, snow, or strong winds.
Fixing the Antenna to the Pole
Installation of the antenna
Carry out the following steps:
- Loosen the nut between the upper and lower arms.
- Secure the toothed clamps at the top mounting assembly to the pole.
- Remove the bolts, nuts, spring washers, and flat washers from the toothed clamps.
- Place the toothed clamp connected to the antenna against the pole, thread the bolts through the toothed clamp, put the other toothed clamp on the bolts, and put back the flat washers, spring washers and nuts.
- Tighten the nuts to secure the toothed clamps (not tightly).
- Repeat step 2 to secure the toothed clamps at the bottom mounting assembly to the pole.
- Adjust the antenna until it is perfectly vertical (the adjustable angle is 0 degrees), adjust the toothed clamps, and then secure all the toothed clamps to the pole. Set the desired antenna tilt angle and then tighten all nuts on the top and bottom assemblies with a tightening torque of 18 N m.
- Remove the protective cap from the antenna connector, connect the feeder cable to the connector, and tighten the connector. Thoroughly wrap the cable connector with waterproof tape. For details, see the section Connecting RF Cables.
The antenna is normally tilted downward. However, you can swap over the top and bottom mounting assemblies to tilt the antenna upward to satisfy project demands.
Installing the Pole and Lightning Rod
Carry out the following steps:
- Weld the lightning rod to the top of the antenna pole.
- Install the antenna pole on a parapet or concrete bed on the roof of the building.
- Use a 40 mm x 4 mm flat piece of steel to connect the antenna pole to an earth mat.
- Secure the outdoor directional antenna to the pole using an antenna support. Keep the pole vertical during the installation.
Take note of the following points when installing an outdoor directional antenna:
- If the roof of the building is surrounded by parapets of no less than 1.2 m high, fix the pole on a parapet with expansion screws, and then fix the outdoor directional antenna on the pole with an antenna support.
- If the roof of the building is surrounded by parapets of less than 1.2 m high, fix one of the installation points of the pole on a parapet and the other installation point to the roof with expansion screws, and then fix the outdoor directional antenna to the pole with an antenna support.
- If there are no parapets around the roof, fix the pole to the ground or a concrete bed with expansion screws and steel wires, and then fix the outdoor directional antenna on the pole with an antenna support.
Figure 15-4 illustrates how an outdoor directional antenna and a pole are installed.
The following figure shows the protection area of a lightning rod. The entire antenna must be within the 45-degree protection area of the lightning rod.
If an antenna is installed on a metal pole such as a steel pole, you do not need to install a lightning rod, as shown on the right in the preceding figure.
Outdoor AP Installation Scenarios
Figure 15-5 shows an outdoor AP installation scenario. The distance between a 2.4 GHz antenna and a 5 GHz antenna must be more than 0.5 m.
The distance between two single-polarized antennas of the same AP should be more than 0.5 m, and the two antennas should cover the same area, as shown in Figure 15-6.
