Chapter
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10-19
10.4.7.3
Cutting the Feeders
Caution:
When cutting the main feeder, label it at both ends. Temporary label can also be
attached to the middle of the feeder. All the labels must be consistent. Otherwise, the
feeder may not be correctly connected and the sectors may not correspond to the feeder.
This is crucial!
Usually the feeder is rolled over to the installation site. The length of the main feeder
should be exactly measured again on site according to the final route negotiated with
the user. And the feeder should be cut into sections as required. The cutting steps are as
follows:
1. For the antenna feeder to be installed on the roof
1) Determine the length of the main feeder in each sector again with a tape measure
according to the actual route;
2) Cut the feeder to the length of the measured actual length plus 1m to 2m;
3) After cutting a main feeder, attach the corresponding temporary label to both
ends of the feeder, for example, ANT1, ANT2, ANT3, ANT4, ANT5 and ANT6.
When the feeder is installed, attach the formal label to it.
4) Move the cut feeders to the roof. During the process, take care that the feeders
are not damaged or pressed.
2. For the antenna feeder to be installed on the tower
1) Use roller support, pulley block and hoisting rope to lift one end of the feeder to
the tower top. The personnel under the tower cut the feeder to the length from
the feeder enters the equipment room to the lightning arrester frame plus certain
redundancy. Attach temporary labels to the lower part of the feeder. When the
feeder enters the equipment room, attach the formal label to it.
2) It is better to make the upper connector of the main feeder before hoisting it to
reduce the time that the staff works at heights and to better ensure the
installation quality of the feeder connector.
