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Issue Draft A (2012-11-30)Huawei Proprietary and Confidential
DBS3900
RRU3252/RRU3256 Hardware DescriptionAbout This Document
About This Document
Purpose
This document provides reference for planning and deploying an RRU3252/RRU3256 (referred
to as RRU in this document). It presents the exterior and describes the ports, functions, cable
types, connector specifications, and cable connections of the RRU.
Product Version
The following table lists the product version related to this document.
Product Name
DBS3900 LTE TDDV100R005C00 and later versions
Intended Audience
This document is intended for:
lBase station installation engineers
lSystem engineers
lSite maintenance engineers
Organization
Product Version
1 Change History
This chapter describes changes in the RRU3252/RRU3256 Hardware Description.
2 RRU Introduction
This chapter describes the RRU.
3 RRU Cables
This chapter describes RRU cables.
Issue Draft A (2012-11-30)Huawei Proprietary and Confidential
DBS3900
RRU3252/RRU3256 Hardware DescriptionAbout This Document
4 RRU Auxiliary Devices
This chapter describes remote radio unit (RRU) auxiliary devices.
Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
SymbolDescription
Indicates a hazard with a high level of risk, which if not
avoided, will result in death or serious injury.
Indicates a hazard with a medium or low level of risk, which
if not avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation, which if not
avoided, could result in equipment damage, data loss,
performance degradation, or unexpected results.
Indicates a tip that may help you solve a problem or save
time.
Provides additional information to emphasize or supplement
important points of the main text.
General Conventions
The general conventions that may be found in this document are defined as follows.
Convention
Times New RomanNormal paragraphs are in Times New Roman.
BoldfaceNames of files, directories, folders, and users are in
ItalicBook titles are in italics.
Courier New
Description
boldface. For example, log in as user root.
Examples of information displayed on the screen are in
Courier New.
Command Conventions
The command conventions that may be found in this document are defined as follows.
Convention
BoldfaceThe keywords of a command line are in boldface.
Issue Draft A (2012-11-30)Huawei Proprietary and Confidential
3.3 RRU Power Cable............................................................................................................................................12
lReceives RF signals from the antenna system, converts the received signals into IF signals,
amplifies the IF signals, and performs analog-to-digital conversion. The TX channel filters
downlink signals, performs digital-to-analog conversion, and converts IF signals into
signals applicable to the TX band.
lMultiplexes RX and TX signals on the RF channel, which enables these signals to share
the same antenna path. It also filters RX and TX signals.
2.1 RRU Exterior
This section describes the exterior and dimensions of an RRU.
2.2 RRU Ports
This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity
panel, and indicator panel.
2.3 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
Issue Draft A (2012-11-30)Huawei Proprietary and Confidential