Huawei DBS3900 Installation Manual page 115

DBS3900 (ICR)
Installation Guide
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Cabling Requirements for PGND Cables
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Cabling Requirements for E1 Cables
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Cabling Requirements for Fiber Optic Cables
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Issue 12 (2015-04-30)
If DC power cables need to be routed close to a device on the tower, secure the cables to
the guardrail or pole with cable clips. The device cannot be far away from the position for
securing the cables.
PGND cables for the base station must be connected to the same ground bar.
PGND cables must be buried in the ground or routed indoors. They should not be routed
overhead before they are led into the equipment room.
The exterior of the coaxial wire and the shield layer of the shielded cable must have proper
electrical contact with the metal surface of the equipment to which they are connected.
PGND cables and signal cables must be installed in an untangled and orderly fashion. A
certain distance must be reserved between them to prevent interference from each other.
Fuses or switches must not be installed on the PGND cables.
Other devices must not be used for electrical connections of the PGND cables.
All the metal parts in the housing of the equipment must be reliably connected to the ground
terminal.
E1 cables must not cross power cables, PGND cables, or RF cables when routed. If
transmission cables are routed with power cables, PGND cables, or RF cables in parallel,
the spacing between them must be greater than 30 mm (1.18 in.).
E1 cables are routed straightly and bound neatly with cable ties.
Sufficient slack is provided in E1 cables at turns.
E1 cables cannot be squeezed by the cabinet door when routed through the cabinet, as
shown in Figure 15-3.
Figure 15-3 E1 cables routed through the cabinet
Fiber optic cables must be routed by at least three qualified and trained personnel before
all preparations are made.
Fiber optic cables are used within the temperature range of -40°C to 60°C. If the current
temperature is out of the range, make protection measures or route the cables again.
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15 Installing Cables
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