Huawei DBS3900 LTE Installation Manual page 114

RRU3260
Installation Guide
2.
3.
Step 4 Check the dustproof caps on antenna connectors. In outdoor scenarios, dustproof caps must be
waterproofed, as shown in
Do not remove dustproof caps from vacant antenna connectors.
Figure 9-14 Waterproofing a dustproof cap
(1) Dustproof cap
l Before wrapping waterproof tape, stretch the tape evenly until the length of the tape becomes twice its
l Do not stretch the PVC insulation tape when wrapping the PVC insulation tape.
l Wrap each layer of tape around the connector tightly and neatly, and ensure that each layer of tape overlaps
l Ensure that the adhesive surface of the tape overlaps the lower layer.
l When cutting off the cable ties, reserve a redundant length of 3 mm (0.12 in.) to 5 mm (0.2 in.).
1.
2.
Issue ()
in.) away below the bottom of the connector to the top of the connector, first from bottom
up, then from top down, and finally from bottom up. Cut off the redundant tape after three
layers are wrapped. Wrap each layer of tape around the connector tightly.
Wrap three layers of PVC insulation tape. Start the wrapping at a position 30 mm (1.18 in.)
away below the bottom of the waterproof tape to the top of the connector, first from bottom
up, then from top down, and finally from bottom up. Cut off the redundant tape after three
layers are wrapped. Wrap each layer of tape around the connector tightly.
Start binding cable ties to the cable at a position 3 mm (0.12 in.) to 5 mm (0.2 in.) away
from one end of the PVC insulation tape.
CAUTION
NOTE
original length.
more than 50% of the preceding layer. Ensure that neighboring layers are stuck to each other.
Verify that dustproof caps are not removed.
Wrap three layers of waterproof tape on the connector, first from bottom up, then from top
down, and finally from bottom up. Wrap each connector with three layers of waterproof
tape, from bottom up, then from top down, and finally from bottom up. Do not cut the tape
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Figure 9-14.
(2) Waterproof tape
9 Installing RRU Cables
(3) PVC insulation tape
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