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Appendix
a
Binding the RRU and Installation Components
2. Lifting the RRU and Installation
Components to the Tower
2.1. Installers A climb onto the tower. Then,
installer A fixes the pulley to the support of
the tower platform and leads the lifting rope
through the pulley.
2.2. Installer C uses a lifting rope to bind the
RRU and installation components as shown
in the preceding figure and then tie a knot in
the steering rope at the handle of the RRU.
2.3. Installer B pulls the lifting rope, and at
the same time, installer C pulls the steering
rope away from the tower to prevent the
RRU and installation components from
colliding with the tower.
2.4. Installers A hold the RRU and
installation components and untie the ropes.
3. Lifting the CPRI Optical Cable up to the Tower
3.1. Cut off a 200 mm long corrugated pipe
with the diameter of 25 mm.
3.2. Lead the fiber tails labeled 1A and 1B
of the optical cable into the corrugated pipe
by 160 mm.
3.3. Wrap up the corrugated pipe and
optical cable with the color tape.
3.4. For the tower made of steel pipes, tie
the black jacket to the corrugated pipe at
the position 150 mm away from the color
tape, and then lift the optical cable up to the
tower.
3.5. For the tower made of angle steel
girders, carry the optical cable onto the
tower when climbing up to the tower.
3.6. After the optical cable is lifted up to the
tower, remove the color tape and
corrugated pipe before installing the optical
cable.
Lifting rope
Color tape
33
定滑轮
Pulley
Steering rope
Corrugated
pipe
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