User's Manual

RRU3278

Installation Guide

8 Installing RRU Cables

Issue 05 (2017-03-10)

Huawei Proprietary and Confidential

Figure 8-16 Waterproofing using the shrink sleeve method

1. PVC insulation tape

2. Waterproof tape

1. Wrap a layer of PVC insulation tape 15 mm (0.59 in.) away from the bottom of the

connector. The insulation tape must cover a length of 40 mm (1.57 in.).

2. Cut a waterproof tape with a length of 50 mm (1.97 in.) and stretch the tape evenly until

the length of the tape is twice of its original length. Then, wrap the connector on the

jumper with the waterproof tape and ensure that the waterproof tape covers the PVC

insulation tape.

3. Install the shrink sleeve. Push the shrink sleeve to the bottom of the connector.

4. Pull out the supporting bar and push the shrink sleeve to the bottom of the connector on

the RRU. Ensure that the shrink sleeve is fastened at the bottom of the connector.

5. The installation of the shrink sleeve is complete.



Do not use a wrench to tighten the connector next to a connector that has been equipped with a

shrink sleeve because this operation will cause damage to the shrink sleeve.



When installing the shrink sleeve, lead the RF jumper through the shrink sleeve first. Then, install

and fasten the RF connector.



Ensure that no sand or other object enters the shrink sleeve.



Waterproofing using the shrink sleeve applies only to used RF ports at the bottom of the RRU. For

details on waterproofing unused RF ports at the bottom of the RRU, see Step 4.

Step 4 Do not remove dustproof caps from the RF ports that are not used. The RF ports must be

waterproofed, as shown in Figure 8-17.