Zte ZXCBTS M190T, Руководство по установке

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Chapter
8 Installation
of Primary Antenna Feeder System
8-23
Checking labels
Check if the temporary labels are stuck on the cables. Without the labels, you
might misconnect the cables.
Determining the cutting position
Determine the cutting position based on the installation position of the shelf and
the lightning arrester, length of jumper cable on top, and the bending radius of
the feeder cables.
4) Assemble the indoor connectors of the primary feeder cables.
8.6.8 Connecting Indoor Jumper Cable
The indoor jumper cable on top is connected between the primary feeder cable and the
antenna interface at the bottom of a micro-BTS. Customize a jumper cable on site
based on the actual situation. One end of the jumper cable is a male N connector, which
is directly connected to the bottom of the cabinet. The other end is a female DIN
connector, which is connected to the 7/8” primary feeder cable. See Fig. 8.6-1.
8.7 Grounding System of Micro-BTS
Grounding aims to protecting both the human being and the equipment against
lightning shock and electromagnetic interference.
The grounding system of a micro-BTS includes protection grounding on the chassis,
lightning arrester for RF components in the cabinet, for GPS antenna, for T1 cables, for
120V AC power and for feeder cable grounding kit.
1. Grounding principles of primary feeder cables
1) Generally, each primary feeder cable should be grounded at least three times for
lightning protection, that is, on the tower platform, between the tower and the
outdoor cabling rack, and on the wall before the feeder cable is led into the
equipment room. If the primary feeder cable is more than 60 meters long, a
lightning grounding kit should be installed every 20 meters. If the primary
feeder cable is shorter than 5m, one grounding point is enough. If the feeder
cable is shorter than 20m but longer than 5m, it can be grounded at two points.
2) The antenna feeder system, antenna mount and newly-installed cabling rack
should all be welded to the lightning protection net of the building. The feeder