Installing An Rru Rf Jumper - Huawei DBS3900 Installation Manual

RRU3249
Installation Guide
Step 3 Label the installed cable according to the instructions in Attaching a Cable-Tying Label.
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7.6 Installing an RRU RF Jumper

This section describes the procedure for installing an RRU RF jumper.
Procedure
Step 1 Connect the DIN male connector at one end of the RRU RF jumper to the ANT port on the RRU,
and use a torque wrench to tighten the connector to 25 N·m (221.27 lbf·in.), as shown in
7-14.
Figure 7-14 Installing an RRU RF jumper
On AC-powered electric railways, such as high-speed railways, when leaky cables are connected
to RRUs installed in tunnels, high-voltage-resistance DC blocks must be installed between RRU
RF jumpers and the leaky cables to protect the RRUs against damage.
Step 2 Connect the other end of the RF jumper to the external antenna system.
Step 3 Waterproof the connectors of the RF jumper by referring to
Issue DraftA (2015-05-30)
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7 Installing RRU Cables
Figure 7-15.
Figure
46