Step 3
Label the installed cable by referring to Attaching a Cable-Tying Label.
----End
7.6 Installing an RRU RF Jumper
This section describes the procedure for installing an RRU RF jumper.
Procedure
Step 1
Link the DIN connector at one end of the RF jumper to the ANT port and use a torque wrench
to tighten the connector to 25 N·m (221.27 lbf·in.), as shown in
.
Figure 7-10
Installing an RRU RF jumper
CAUTION
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
Link the other end of the RF jumper to the external antenna system.
Step 3
Waterproof the connectors of the RF jumper by referring to
RRU3942
Installation Guide
7 Installing RRU Cables
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