Huawei iSiteC BTS3601C Installation Manual page 61

Installation Manual
iSiteC BTS3601C CDMA Base Station
protection grounding bar directly. The following gives description of feeder grounding
points in different installation modes.
I. BTS outdoor installation mode
Within the range of 1m~2m under the antenna;
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The front end connecting the BTS.
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Caution:
1) When soft jumper is adopted for the feeder and the feeder is not longer than 5m, the shielding covering
of the feeder may be grounded at the front end connecting the BTS.
2) If the feeder is longer than 60m, feeder grounding clips should be applied in the middle of the feeder,
with the clip spacing of 20m.
II. BTS indoor installation with the outdoor feeder longer than 20m
Within the range of 1m~2m under the antenna;
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Within 1m range of the mast or of where the feeder is led from the tower platform;
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At the outer side of the feeder window where the feeder enters the equipment
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room (connecting to outdoor PGND bar).
Close to the indoor protection grounding bar after it enters the equipment room.
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Others:
If the feeder is longer than 60m, feeder grounding clips should be applied in the
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middle of the feeder, with the clip spacing of 20m.
If the feeder is led into the room after being routed for a stretch of distance on the
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building-top, and the distance exceeds 20m, a feeder grounding clip should be
applied on building-top.
For the feeder that enters the room from the building-top along the wall, if a cabling
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rack is used, the cabling rack should also be grounded.
Feeder grounding cable should be routed toward the BTS antenna and feeder port
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along the antenna. The included angle between the feeder grounding cable and
the feeder should not be greater than 15°. The feeder grounding clip should be
directly secured to the steel board on the nearby tower body.
III. BTS indoor installation with the outdoor feeder shorter than 20m
Within the range of 1m~2m under the antenna;
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At the outer side of the feeder window where the feeder enters the equipment
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room (connecting to outdoor PGND bar);
Close to the indoor PGND bar after it enters the equipment room.
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3 Installing RF Antenna and Feeder System
3-29
Hardware Installation