Leading Feeder Into Equipment Room - Huawei iSiteC BTS3601C Installation Manual

Installation Manual
iSiteC BTS3601C CDMA Base Station
Caution:
1) When soft jumper is adopted for the feeder and the feeder is not longer than 10m, the shielding covering
of the coaxial soft jumper may be grounded at two points, i.e., below the antenna and indoor.
2) When soft jumper is adopted for the feeder and the feeder is not longer than 5m, the shielding covering
of the coaxial soft jumper may be grounded at one point indoor.

3.7.6 Leading Feeder into Equipment Room

I. Feeder arrangement principle
There are 4 big holes in a 12-hole feeder window, and 3 small holes in each big
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hole. One feeder can run through a small hole.
The feeders should be arranged in sequence (i.e. clockwise or counter-clockwise)
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in the three small holes of the same big hole.
The arrangement of feeders in the feeder window should facilitate system
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expansion. The original arrangement of feeders should not be changed during
system expansion. It is permitted to add feeders to the feeder window and change
the jumper connection on the cabinet top only.
The arrangement of feeders in the feeder window should facilitate the routing of
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feeders on the cabling rack and the connection of feeders with the cabinet top. The
feeders should be parallel to each other without any cross.
The length of the feeder entering the feeder window should be 30cm~50cm. If
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there is an indoor cabling rack, the feeder can be fixed with feeder clip. If not, the
feeder may be hanged in air.
Caution:
The minimum feeder curving radius should not be less than 20 times of the feeder diameter.
There should be no cross of the feeder when it is routed along the cabling rack and tower cabling ladder.
And there should be no crossing or overlapping of the feeder entering the equipment room. Therefore, it is
required to get an idea of the feeder routing prior to feeder distribution. It is best to draft the actual feeder
routing on paper to avoid rework due to feeder crossing.
II. Procedure
1) Make waterproof elbow for the feeder at the outer side of the feeder window.
3 Installing RF Antenna and Feeder System
3-30
Hardware Installation