Installation Manual – Antenna & Feeder System Installation
BTS3802C & RRU
Chapter 2
Installing RF Antenna & Feeder System
2-36
Figure 2-35
1-for-3 Feeder fixing clips
4) Connect the jumper with the feeder. The jumpers shall bend in a natural manner.
The bending radius shall be 20 times longer than the jumper diameter.
5) Bind the jumpers and label them using metal labels. The label shall be attached
100 mm away from the end of the jumper. For each jumper, only one label is
required, as the jumper is usually very short.
Caution:
The binding tape shall be wound in the same way. For the cuttings, there shall be a slack of 5~10 mm
left lest the tape shall fall off the jumper due to temperature changes.
2.13 Laying and Fixing Feeders
2.13.1 Layout Principles
z The minimum bending radius of the feeder shall be 20 times longer than the
feeder diameter.
z Feeders shall not cross each other when running along the cabling rack or down
the tower. The feeders from the antenna to the place where they are led into the
equipment room shall be laid in good order.
z The layout of feeders shall be conducted from top to bottom, and make sure to
put the feeders in order and fix them with fixing clips while laying the feeders.
z The feeder fixing clip shall be mounted every 2 m or so along the tower or the
cabling rack.
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