Huawei RRU3942 Guide

RRU3942
Hardware Description
Issue 02
Date 2012-06-29
HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and the
customer. All or part of the products, services and features described in this document may not be within the
purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,
and recommendations in this document are provided "AS IS" without warranties, guarantees or representations
of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute the warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
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Email: [email protected]
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About This Document
Purpose
This document provides reference for planning and deploying an RRU3942 (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 Product Version
DBS3900 V100R004C00 and later versions
DBS3900 GSM V100R013C00 and later versions
DBS3900 WCDMA V200R013C00 and later versions
DBS3900 LTE V100R005C00 and later versions
Intended Audience
This document is intended for:
lBase station installation engineers
lSystem engineers
lSite maintenance engineers
Organization
1 Changes in the RRU3942 Hardware Description
This chapter describes the changes in the RRU3942 Hardware Description.
2 RRU Introduction
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This chapter describes the function and exterior of the RRU as well as the ports and indicators
on the RRU.
3 RRU Cables
This chapter describes RRU cables.
4 RRU Auxiliary Devices
This chapter describes RRU auxiliary devices.
Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
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 Description
Times New Roman Normal paragraphs are in Times New Roman.
Boldface Names of files, directories, folders, and users are in
boldface. For example, log in as user root.
Italic Book titles are in italics.
Courier New Examples of information displayed on the screen are in
Courier New.
Command Conventions
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The command conventions that may be found in this document are defined as follows.
Convention Description
Boldface The keywords of a command line are in boldface.
Italic Command arguments are in italics.
[ ] Items (keywords or arguments) in brackets [ ] are optional.
{ x | y | ... } Optional items are grouped in braces and separated by
vertical bars. One item is selected.
[ x | y | ... ] Optional items are grouped in brackets and separated by
vertical bars. One item is selected or no item is selected.
{ x | y | ... }*Optional items are grouped in braces and separated by
vertical bars. A minimum of one item or a maximum of all
items can be selected.
[ x | y | ... ]*Optional items are grouped in brackets and separated by
vertical bars. Several items or no item can be selected.
GUI Conventions
The GUI conventions that may be found in this document are defined as follows.
Convention Description
Boldface Buttons, menus, parameters, tabs, window, and dialog titles
are in boldface. For example, click OK.
>Multi-level menus are in boldface and separated by the ">"
signs. For example, choose File > Create > Folder.
Keyboard Operations
The keyboard operations that may be found in this document are defined as follows.
Format Description
Key Press the key. For example, press Enter and press Tab.
Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt
+A means the three keys should be pressed concurrently.
Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means
the two keys should be pressed in turn.
Mouse Operations
The mouse operations that may be found in this document are defined as follows.
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Action Description
Click Select and release the primary mouse button without moving
the pointer.
Double-click Press the primary mouse button twice continuously and
quickly without moving the pointer.
Drag Press and hold the primary mouse button and move the
pointer to a certain position.
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Contents
About This Document.....................................................................................................................ii
1 Changes in the RRU3942 Hardware Description....................................................................1
2 RRU Introduction..........................................................................................................................2
2.1 RRU Functions...................................................................................................................................................3
2.2 RRU Exterior......................................................................................................................................................3
2.3 RRU Ports...........................................................................................................................................................4
2.4 RRU Indicators...................................................................................................................................................9
3 RRU Cables...................................................................................................................................11
3.1 RRU Cable List................................................................................................................................................13
3.2 RRU PGND Cable............................................................................................................................................15
3.3 RRU Power Cable............................................................................................................................................16
3.4 RRU Alarm Cable............................................................................................................................................17
3.5 CPRI Fiber Optic Cable....................................................................................................................................18
3.6 RRU RF Jumper...............................................................................................................................................21
3.7 Inter-RRU RF Cable.........................................................................................................................................22
3.8 RRU AISG Multi-Wire Cable..........................................................................................................................22
3.9 RRU AISG Extension Cable............................................................................................................................23
4 RRU Auxiliary Devices..............................................................................................................25
4.1 OCB..................................................................................................................................................................26
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Hardware Description Contents
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1 Changes in the RRU3942 Hardware
Description
This chapter describes the changes in the RRU3942 Hardware Description.
02 (2012-06-29)
This is the second official release.
Compared with issue 01 (2012-04-25), this issue does not include any new information.
Compared with issue 01 (2012-04-25), this issue includes the following changes:
Topic Change Description
3.2 RRU PGND Cable Added the length information of the cables.
3.3 RRU Power Cable
3.7 Inter-RRU RF Cable
3.8 RRU AISG Multi-Wire Cable
3.9 RRU AISG Extension Cable
3.1 RRU Cable List Optimized the contents in this section.
Compared with issue 01 (2012-04-25), no information is deleted from this issue.
01 (2012-04-25)
This is the first official release.
Compared with draft A (2012-01-10), this issue does not include any modification.
Draft A (2012-01-10)
This is a draft.
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Hardware Description 1 Changes in the RRU3942 Hardware Description
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2 RRU Introduction
About This Chapter
This chapter describes the function and exterior of the RRU as well as the ports and indicators
on the RRU.
2.1 RRU Functions
This section describes the main functions of the RRU.
2.2 RRU Exterior
This section describes the exterior and dimensions of an RRU.
2.3 RRU Ports
This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity
panel, and indicator panel.
2.4 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
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2.1 RRU Functions
This section describes the main functions of the RRU.
The Remote Radio Unit (RRU) performs the following functions:
lReceives downlink baseband data from the BBU and sends uplink baseband data to the
BBU.
lReceives RF signals from the antenna system, down-converts the signals to intermediate
frequency (IF) signals, amplifies the IF signals, and performs analog-to-digital conversion.
The transmit (TX) channel filters downlink signals, performs digital-to-analog conversion,
and up-converts RF signals to the TX band.
lMultiplexes receive (RX) and TX signals on the RF channel, which enables these signals
to share the same antenna path. It also filters the RX and TX signals.
lProvides a built-in Bias Tee (BT). The built-in BT couples RF signals and OOK signals
and transmits them through the TX/RX port A. The built-in BT also supplies power to the
tower mounted amplifier (TMA).
lThe RRU can be powered by the AC/DC power module. In this case, this RRU is called
AC RRU. For details about the AC/DC power module, see the AC/DC Power Module User
Guide.
2.2 RRU Exterior
This section describes the exterior and dimensions of an RRU.
Figure 2-1 shows an RRU.
Figure 2-1 RRU exterior
Figure 2-2 shows RRU dimensions.
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Figure 2-2 RRU dimensions
2.3 RRU Ports
This section describes ports on the RRU panels. An RRU has a bottom panel, cabling cavity
panel, and indicator panel.
Figure 2-3 shows the ports on the RRU panels.
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Figure 2-3 Ports on the RRU panels
Table 2-1 describes ports and indicators on the RRU panels.
Table 2-1 Ports and indicators on the RRU panels
Item Silkscreen Description
(1) Ports at the bottom ANT_TX/RXA TX/RX port A, supporting RET signal
transmission
ANT_RXC RX port C
ANT_RXD Port RX port D
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Item Silkscreen Description
ANT_TX/RXB TX/RX port B
RX_IN/OUT Port for the inter-RRU RF cable
RET Communication port for the RET antenna,
supporting RET signal transmission
(2) Ports in the cabling
cavity
RTN(+) Power supply socket
NEG(-)
CPRI0 Optical/electrical port 0
CPRI1 Optical/electrical port 1
EXT_ALM Port for alarm reporting
(3) Indicators RUN For details, see 2.4 RRU Indicators.
ALM
ACT
VSWR
CPRI0/IR0
CPRI1/IR1
NOTE
The RET ports to be used are determined by the software configuration.
Table 2-2 describes how to use RF ports.
Table 2-2 Usage
Product Version TX/RX
Channe
l
Number
of Used
RF Ports
Usage Remark
lDBS3900
V100R004C00
lDBS3900 GSM
V100R013C00
lDBS3900
WCDMA
V200R013C00
1*2T2R 2 ANT_TX/RXA works with
ANT_TX/RXB.
A single
sector
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Product Version TX/RX
Channe
l
Number
of Used
RF Ports
Usage Remark
lDBS3900 GSM
V100R014C00
and later versions
1*1T2R 2 It is recommended that
ANT_TX/RXA works with
ANT_RXC.
You can also use the ports in
the following ways:
ANT_TX/RXB works with
ANT_RXD.
A single
sector
1*2T2R 2 ANT_TX/RXA works with
ANT_TX/RXB.
A single
sector
2*1T2R 4 ANT_TX/RXA works with
ANT_RXC and ANT_TX/
RXB works with
ANT_RXD .
Two sectors
lDBS3900
V100R007C00
and later versions
lDBS3900
WCDMA
V200R014C00
and later versions
lDBS3900 LTE
V100R005C00
and later versions
1*1T2R 2 It is recommended that
ANT_TX/RXA works with
ANT_RXC.
You can also use the ports in
the following ways:
ANT_TX/RXB works with
ANT_RXD.
A single
sector
1*2T2R 2 ANT_TX/RXA works with
ANT_TX/RXB.
A single
sector
1*2T4R 4 ANT_TX/RXA,
ANT_RXC, ANT_TX/
RXB, and ANT_RXD work
together.
A single
sector
2*1T2R 4 ANT_TX/RXA works with
ANT_RXC and ANT_TX/
RXB works with
ANT_RXD .
Two sectors
Figure 2-4 shows the recommended usage of the RF ports on an RRU3942 used for DBS3900
V100R004C00, DBS3900 GSM V100R013C00 and DBS3900 WCDMA V200R013C00.
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Figure 2-4 Recommended usage of the RF ports for DBS3900 V100R004C00, DBS3900 GSM
V100R013C00 and DBS3900 WCDMA V200R013C00
Figure 2-5 shows the recommended usage of the RF ports on an RRU3942 used for DBS3900
GSM V100R014C00 and later versions.
Figure 2-5 Recommended usage of the RF ports for DBS3900 GSM V100R014C00 and later
versions
Figure 2-6 shows the recommended usage of the RF ports on an RRU3942 used for DBS3900
V100R007C00 and later versions, DBS3900 WCDMA V200R014C00 and later versions,
DBS3900 LTE V100R005C00 and later versions.
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Figure 2-6 Recommended usage of the RF ports for DBS3900 V100R007C00 and later versions,
DBS3900 WCDMA V200R014C00 and later versions, DBS3900 LTE V100R005C00 and later
versions
2.4 RRU Indicators
This section describes six indicators on an RRU. They indicate the running status.
For detailed positions of RRU indicators, see 2.3 RRU Ports.
Table 2-3 describes RRU indicators.
Table 2-3 RRU indicators
Silkscree
n
Color Status Description
RUN Green Steady on There is power supply, but the module is
faulty.
Steady off There is no power supply, or the module is
faulty.
Blinking (on for
1s and off for 1s)
The board is running properly.
Blinking (on for
0.125s and off for
0.125s)
Software is being loaded to the module, or
the module is not started.
ALM Red Steady on An alarm is generated, and the module must
be replaced.
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Silkscree
n
Color Status Description
Blinking (on for
1s and off for 1s)
An alarm is generated. The alarm may be
caused by a fault on a related board or port.
Therefore, you need to locate the fault before
deciding whether to replace the module.
Steady off No alarm is generated.
ACT Green Steady on The module is running properly with TX
channels enabled or the software is being
loaded without RRU running.
Blinking (on for
1s and off for 1s)
The module is running properly with TX
channels disabled.
VSWR Red Steady off No Voltage Standing Wave Ratio (VSWR)
alarm is generated.
Blinking (on for
1s and off for 1s)
VSWR alarms are generated on the
ANT_TX/RXB port.
Steady on VSWR alarms are generated on the
ANT_TX/RXA port.
Blinking (on for
0.125s and off for
0.125s)
VSWR alarms are generated on the
ANT_TX/RXA and ANT_TX/RXB ports.
CPRI0/IR0 Red or
green
Steady green The CPRI link is functioning properly.
Steady red An optical module fails to transmit or receive
signals because the optical module is faulty
or the fiber optic cable is broken.
Blinking red (on
for 1s and off for
1s)
The CPRI link is out of lock because of
mutual lock of dual-mode clock sources or
mismatched data rates over CPRI ports.
Steady off The optical module cannot be detected, or the
CPRI cable is not connected properly.
CPRI1/IR1 Red or
green
Steady green The CPRI link is functioning properly.
Steady red An optical module fails to receive signals
because the optical module is faulty or the
fiber optic cable is broken.
Blinking red (on
for 1s and off for
1s)
The CPRI link is out of lock because of
mutual lock of dual-mode clock sources or
mismatched data rates over CPRI ports.
Steady off The optical module cannot be detected, or the
CPRI cable is not connected properly.
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3 RRU Cables
About This Chapter
This chapter describes RRU cables.
3.1 RRU Cable List
This section describes RRU cable connections.
3.2 RRU PGND Cable
An RRU PGND cable connects an RRU and a ground bar, ensuring the proper grounding of the
RRU. The maximum length of the RRU PGND cable is 30 m (98.42 ft.).
3.3 RRU Power Cable
The RRU power cable is a -48 V DC shielded cable. It feeds -48 V DC power to an RRU. The
maximum length of the RRU power cable is 50 m (164.04 ft.).
3.4 RRU Alarm Cable
The RRU alarm cable, a shielded straight-through cable, transmits alarm signals from an external
device to an RRU so that the base station monitors the operating status of external devices. The
maximum length of the RRU alarm cable is 5 m (16.40 ft.).
3.5 CPRI Fiber Optic Cable
CPRI fiber optic cables are classified into multi-mode fiber optic cables and single-mode fiber
optic cables. They transmit CPRI signals.
3.6 RRU RF Jumper
The 1/2" RRU RF jumper transmits and receives RF signals between an RRU and an antenna.
3.7 Inter-RRU RF Cable
An inter-RRU RF cable connects the RX_IN/OUT ports on two RRUs in the same cell and
transmits RF signals between the RRUs. The maximum length of the inter-RRU RF cable is 2
m (6.56 ft.).
3.8 RRU AISG Multi-Wire Cable
An RRU AISG multi-wire cable connects an RRU and an RCU to transmit control signals from
a base station to an RET antenna. When the RRU is connected to the RET antenna, an AISG
multi-wire cable transmits RS485 signals. The maximum length of the AISG multi-wire cable
is 5 m (16.40 ft.).
3.9 RRU AISG Extension Cable
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When the distance between an RRU and an RCU is longer than 5 m (16.4 ft.), an AISG multi-
wire cable is not long enough to connect the RRU and the RCU. In this case, an AISG extension
cable is used to extend the AISG multi-wire cable for transmitting RS485 signals. The maximum
length of the AISG extension cable is 15 m (49.21 ft.).
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3.1 RRU Cable List
This section describes RRU cable connections.
Table 3-1 lists RRU cables.
Table 3-1 RRU cables
Cable One End The Other End
Connector Installation
Position
Connector Installation
Position
3.2 RRU
PGND
Cable
OT terminal (M6,
16 mm2 or 0.025
in.2)
Ground
terminal on the
RRU
OT terminal
(M8, 16 mm2 or
0.025 in.2)
Ground terminal
on the ground bar
3.3 RRU
Power Cable
Tool-less female
connector
(pressfit type)
NEG(-) and
RTN(+) ports
on the RRU
Tool-less female
connector
(pressfit type)
One of RRU0 to
RRU5 ports on
the EPU
One of LOAD0 to
LOAD5 ports on
the DCDU-11B
3.4 RRU
Alarm Cable
DB15 male
connector
EXT_ALM
port on the
RRU
Cord end
terminal
External alarm
device
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