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DBS3900 LampSite 
Installation Guide 
9 Installing a pRRU3907 or pRRU3916 
 
Issue 08 (2016-05-30) 
Huawei Proprietary and Confidential         
Copyright © Huawei Technologies Co., Ltd. 
195 
 
Figure 9-22
 Waterproofing the connector of the RF jumper 
 
 
 
 
Wrap cold shrink sleeves around the RF jumpers before installing the connectors. 
 
Do not rotate the adjacent connectors of a connector that has been wrapped with a cold 
shrink sleeve. Otherwise, the cold shrink sleeve may be damaged. 
 
During installation, ensure that no foreign substance, including sand, enters the sleeve. 
1. 
Wrap a PVC insulation tape around the exposed area of the connector. The wrapped area 
is 15 mm away from the end of the connector, with a total length of 40 mm. 
2. 
Ensure that dimensions (L x W) of the waterproof tape is 50 mm x 50 mm. Stretch the 
tape horizontally until it is twice of the original length and wrap it around the upper area 
of the connector.   
Ensure that the upper end of the waterproof tape overlays that of the PVC insulation 
tape. 
3. 
Push the cold shrink sleeve to the end of the pRRU3907 connector while gently pulling 
out the support strip along the jumper until the sleeve shrinks and secures the connector. 
4. 
Pull out the support strip along the direction indicated by the arrow.