Installing Pgnd Cables - Huawei DBS3900 Installation Manual

DBS3900 (Ver.B)
Installation Guide
l
l
l
l
l
Cabling requirements for PGND cables are as follows:
l
l
l
l
l
l
l
Cabling requirements for E1 cables are as follows:
l
l
l
Cabling requirements for fiber optic cables are as follows:
l
l
l
l

11.4.2 Installing PGND Cables

When a DBS3900 is deployed in an indoor wall-mounted scenario, PGND cables such as a BBU
PGND cable and DCDU-03B PGND cable must be installed.
Installing a BBU PGND Cable
A BBU PGND cable ensures proper grounding of a BBU.
Context
Table 11-1
Issue 06 (2011-09-15)
+24 V power cables must be bound together.
Power cables, transmission cables, and signal cables are routed separately.
Multiple power cables must be bound when routed.
Power cables must be installed in the position specified in engineering design documents.
If the length of power cables is insufficient, replace the cables rather than adding connectors
or soldering joints to lengthen 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.
Do not stretch, step on, or place heavy objects on fiber optic cables. Keep the cables away
from sharp objects.
When fiber optic cables are routed, the extra length of the cables must be coiled around
special devices, such as a fiber coiler.
When coiling fiber optic cables, apply even strength. Do not bend the cables with force.
Vacant optical connectors must be covered with dustproof caps.
lists the specifications of a BBU PGND cable.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
11 Indoor Scenario with DC Power Supply (BBU Installed
on a Wall)
380