Connecting RF Cables

RF Cable Connection Requirements

Connect the feeder connector to the radio interface of an AP and tighten the connector to the interface. The requirements on connections between the AP's radio interfaces and antenna feeder cables are as follows:

• The feeder interfaces of an antenna must be connected to radio interfaces A and B of the same frequency band on an AP.
• The AP's radio interfaces working on the same frequency band (interface A and interface B) must be connected to feeder interfaces of different polarization directions.

  The following figure shows the cable connections.

RF Cable Deployment Requirements

• Use a short feeder cable to connect the antenna to an AP.
• It is recommended that you connect a 50 ohm RF load to an idle antenna interface and wrap the RF load with both the insulation and waterproof tape.
• Wrap the RF cable in single-layer PVC insulation tape, triple-layer waterproof tape, and then triple-layer PVC insulation tape.
• Before wrapping the waterproof tape, stretch the tape evenly until it is 1/2 the width as before. With each layer of tape wrap the cable tightly and ensure that each layer covers more than 50% of the layer beneath it.
• Wrap the triple-layer tape from bottom to top, from top to bottom, and then from bottom to top again.
• Bend radius requirements: RG-8U RF cable: > 150 mm; 1/2" RF cable: > 50 mm; 7/8" RF cable: > 250 mm. One inch (1") equals 25.4 mm.
• The grounding requirements of antennas are the same as those of APs.

RF Cable Connections

1. Antenna interfaces of Huawei outdoor APs provide a 5 kA surge protection capability. In general, no additional surge protective device needs to be installed, and the RF cables are directly connected to the antenna interfaces.

   Outdoor APs support built-in surge protection on all interfaces, but the surge protection works only when the outdoor APs are grounded.

2. If a higher surge protection capability is required, you need to purchase a surge protective device separately. When installing the surge protective device, ensure that it is connected to a ground cable.

Instructions on Making RF Cables

When making RF cables onsite, ensure that the coaxial cables and connectors in use comply with the mappings described in Table Coaxial cables and connectors.

Connecting the type-N male coaxial connector to the RG-8U feeder cable

1. Peel the cable.
2. Install accessories, such as the nut.
3. Install the connector body.
4. Tighten the connector on the cable.
5. After assembly is complete, verify that cable attenuation is within the proper range. Take waterproof measures during the operation.

Connecting the type-N male coaxial connector to the 1/2" feeder cable

1. Peel the cable.
2. Install the back nut.
3. Install the front nut.
4. Put the cable through the heat-shrink tubing.
5. After assembly is complete, verify that cable attenuation is within the proper range. Take waterproof measures during the operation.