Huawei Technologies RU3260 Remote Radio Unit User Manual Hardware Description
Huawei Technologies Co.,Ltd Remote Radio Unit Hardware Description
Contents
- 1. User Manual
- 2. User Manual II
User Manual
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| Document Description | User Manual |
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| Date Submitted | 2014-10-02 00:00:00 |
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| Document Title | Hardware Description |
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| Document Author: | Huawei Technologies Co.,Ltd. |
RU3260
Hardware Description
Issue
03
Date
2014-01-20
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2014. 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 a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website:
http://www.huawei.com
Email:
support@huawei.com
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RRU3260
Hardware Description
About This Document
About This Document
Purpose
This document provides reference for planning and deploying a DC blade RU3260 (referred
to as RU in this document). It presents the exterior and describes the ports, functions, cable
types, connector specifications, and cable connections of the RU.
Product Versions
The following table lists the product versions related to this document.
Product Name
Solution Version
Product Version
DBS3900
SRAN6.0 and later versions
V100R004C00 and later
versions
eRAN2.1 and later versions
V100R003C00 and later
versions
Intended Audience
This document is intended for:
Base station installation engineers
System engineers
Site maintenance engineers
Organization
1 Changes in RU3260 Hardware Description
This chapter describes the changes in RU3260 Hardware Description.
2 RU Introduction
This chapter describes the exterior and function of the RU as well as the ports and indicators
on the RU.
3 RU Cables
Issue 03 (2014-01-20)
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RRU3260
Hardware Description
About This Document
This chapter describes RU cables.
4 RF Cable Connections for the RU3260
RF cable connections for the RU vary depending on the configurations of the RU and
antenna.
5 RU Auxiliary Devices
This chapter describes RU auxiliary devices.
Conventions
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol
Description
Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to personal
injury.
Calls attention to important information, best practices and
tips.
NOTE is used to address information not related to personal
injury, equipment damage, and environment deterioration.
General Conventions
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
Terminal display is in Courier New.
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Hardware Description
About This Document
Command Conventions
Convention
Description
Boldface
The keywords of a command line are in boldface.
Italic
Command arguments are in italics.
[]
Items (keywords or arguments) in square brackets [ ] are
optional.
{ x | y | ... }
Alternative items are grouped in braces and separated by
vertical bars. One is selected.
[ x | y | ... ]
Optional alternative items are grouped in square brackets
and separated by vertical bars. One or none is selected.
{ x | y | ... } *
Alternative items are grouped in braces and separated by
vertical bars. A minimum of one or a maximum of all can
be selected.
GUI Conventions
Convention
Description
Boldface
Buttons, menus, parameters, tabs, windows, 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 Operation
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 Operation
Action
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Description
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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
Contents
About This Document .................................................................................................................... ii
1 Changes in RU3260 Hardware Description ............................................................................. 1
2 RU Introduction............................................................................................................................. 2
2.1 RU Exterior................................................................................................................................................................... 2
2.2 RU Functions ................................................................................................................................................................ 3
2.3 RU Technical Specifications ......................................................................................................................................... 4
2.4 RU Ports ....................................................................................................................................................................... 5
2.5 RU Indicators ................................................................................................................................................................ 7
2.6 Optical Modules............................................................................................................................................................ 8
3 RU Cables ..................................................................................................................................... 10
3.1 RU Cable List ............................................................................................................................................................. 11
3.2 RU PGND Cable......................................................................................................................................................... 12
3.3 RU Power Cable ......................................................................................................................................................... 12
3.4 RU Alarm Cable ......................................................................................................................................................... 13
3.5 CPRI Fiber Optic Cable .............................................................................................................................................. 15
3.6 RU RF Jumper ............................................................................................................................................................ 18
3.7 RU AISG Multi-Wire Cable ....................................................................................................................................... 19
3.8 RU AISG Extension Cable ......................................................................................................................................... 20
4 RF Cable Connections for the RU3260 .................................................................................... 22
5 RU Auxiliary Devices ................................................................................................................. 24
5.1 IFS06 .......................................................................................................................................................................... 24
5.2 OCB ............................................................................................................................................................................ 26
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Hardware Description
1 Changes in RU3260 Hardware Description
Changes in RU3260 Hardware Description
This chapter describes the changes in RU3260 Hardware Description.
03 (2014-01-20)
This is the third official release.
Compared with issue 02 (2013-07-30), this issue includes the following new information:
4 RF Cable Connections for the RU3260.
Compared with issue 02 (2013-07-30), this issue does not include any changes.
Compared with issue 02 (2013-07-30), no information is deleted from this issue.
02 (2013-07-30)
This is the second official release.
Compared with issue 01 (2013-04-28), this issue does not include any new information.
Compared with issue 01 (2013-04-28), this issue includes the following changes:
Topic
Change Description
2.4 RU Ports
Added a detailed description of the alarm
port.
Compared with issue 01 (2013-04-28), no information is deleted from this issue.
01 (2013-04-28)
This is the first official release.
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RRU3260
Hardware Description
2 RU Introduction
RU Introduction
About This Chapter
This chapter describes the exterior and function of the RU as well as the ports and indicators
on the RU.
2.1 RU Exterior
This section describes the exterior and dimensions of an RU.
2.2 RU Functions
This section describes the main functions of the RU.
2.3 RU Technical Specifications
This section describes technical specifications of an RU, including supported modes,
frequency bands, RF specifications, engineering specifications, and antenna capabilities.
2.4 RU Ports
This section describes ports on the RU panels. An RU has a bottom panel, cabling cavity
panel, and indicator panel.
2.5 RU Indicators
This section describes six indicators on an RU. They indicate the running status.
2.6 Optical Modules
An optical module transmits optical signals between an optical port and a fiber optic cable.
2.1 RU Exterior
This section describes the exterior and dimensions of an RU.
Figure 2-1 shows an RU.
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RRU3260
Hardware Description
2 RU Introduction
Figure 2-1 RU exterior
Figure 2-2 shows RU dimensions.
Figure 2-2 RU dimensions
2.2 RU Functions
This section describes the main functions of the RU.
The Remote Radio Unit (RU) consists of the high-speed interface unit, signal processing unit,
power amplifier, duplexer, extension ports, and power module. Figure 2-3 shows the function
structure of the RU.
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Figure 2-3 Function structure of the RU
For details about the extension ports, see 2.4 RU Ports.
The RU performs the following functions:
Receives downlink baseband data from the BBU and sends uplink baseband data to the
BBU.
Receives 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.
Multiplexes 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.
Provides 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).
The RU can be powered by the AC/DC power module. In this case, this RU is called AC
RU. For details about the AC/DC power module, see the AC/DC Power Module User
Guide or OPM15M User Guide.
2.3 RU Technical Specifications
This section describes technical specifications of an RU, including supported modes,
frequency bands, RF specifications, engineering specifications, and antenna capabilities.
For details about technical specifications of an RU, see section "Technical Specifications of
RUs" in the 3900 Series Base Station Technical Description.
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2.4 RU Ports
This section describes ports on the RU panels. An RU has a bottom panel, cabling cavity
panel, and indicator panel.
Figure 2-4 shows the ports on the RU panels.
Figure 2-4 Ports on the RU panels
Table 2-1 describes ports and indicators on the RU panels.
Table 2-1 Ports and indicators on the RU panels
Item
Silkscreen
Remarks
(1) Ports in the
cabling cavity
RTN(+)
Power supply socket
(2) Ports at the
bottom
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NEG(-)
CPRI0
Optical/electrical port 0, connected to the
BBU
CPRI1
Optical/electrical port 1, reserved
ANT_TX/RXA
TX/RX port A, supporting RET signal
transmission
ANT_RXC
RX port C
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Item
(3) Indicators
Silkscreen
Remarks
ANT_RXD Port
RX port D
ANT_TX/RXB
TX/RX port B
EXT_ALM
Alarm monitoring port used for monitoring
one RS485 signal and two dry contact
signals
RET
Communication port for the RET antenna,
supporting RET signal transmission
RUN
See 2.5 RU Indicators.
ALM
ACT
VSWR
CPRI0
CPRI1
The port for transmitting RET signals is determined by the software.
Table 2-2 describes how to use RF ports.
Table 2-2 Usage of RF ports
Product Version
TX/RX
Channe
Number
of Used
RF Ports
Usage
Remarks
DBS3900 LTE
V100R003C00 and
later versions
1x
2T4R
ANT_TX/RXA,
ANT_TX/RXB,
ANT_RXC, and
ANT_RXD are used
together for one sector,
with ANT_TX/RXA and
ANT_RXC combined and
ANT_TX/RXB and
ANT_RXD combined.
A single
sector
Figure 2-5 shows the recommended usage of the RF ports on an RU used for DBS3900 LTE
V100R003C00 and later versions.
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Figure 2-5 Recommended usage of the RF ports on an RU used for DBS3900 LTE
V100R003C00 and later versions
2.5 RU Indicators
This section describes six indicators on an RU. They indicate the running status.
For detailed positions of RU indicators, see 2.4 RU Ports.
Table 2-3 describes RU indicators.
Table 2-3 RU indicators
Indicator
Color
Status
Meaning
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 functioning properly.
Blinking (on for
0.125s and off for
0.125s)
Software is being loaded to the module, or
the module is not started.
Steady on
Alarms are generated, and the module must
be replaced.
Blinking (on for
1s and off for 1s)
Alarms are generated. The alarms may be
caused by the faults on the related boards or
ports. Therefore, you need to locate the
fault before deciding whether to replace the
module.
ALM
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Red
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Indicator
ACT
VSWR
CPRI0
CPRI1
2 RU Introduction
Color
Green
Red
Red or
green
Red or
green
Status
Meaning
Steady off
No alarm is generated.
Steady on
The module is running properly with TX
channels enabled or the software is being
loaded without RU running.
Blinking (on for
1s and off for 1s)
The module is running properly with TX
channels disabled.
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.
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 a
failure in clock lock between two modes or
mismatched data rates over CPRI ports.
Steady off
The optical module cannot be detected, or
the optical module is powered off.
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 a
failure in clock lock between two modes or
mismatched data rates over CPRI ports.
Steady off
The optical module cannot be detected, or
the optical module is powered off.
2.6 Optical Modules
An optical module transmits optical signals between an optical port and a fiber optic cable.
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The exteriors of an optical module and the label on an optical module in this section are for reference
only. The actual exteriors may be different.
Exterior
The following figure shows the exterior of an optical module.
Figure 2-6 Exterior of an optical module
Label on an optical module
There is a label on each optical module, which provides information such as the rate,
wavelength, and transmission mode, as shown in the following figure.
Figure 2-7 Label on an optical module
(1) Rate
(2) Wavelength
(3) Transmission mode
Optical Module Type
Optical modules can be divided into single- and multimode optical modules, which can be
distinguished as follows:
The puller of a single-mode optical module is blue and the puller of a multimode optical
module is black or gray.
The transmission mode is displayed as "SM" on the label of a single-mode optical
module and "MM" on the label of a multimode optical module.
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3 RU Cables
RU Cables
About This Chapter
This chapter describes RU cables.
3.1 RU Cable List
This section describes RU cable connections.
3.2 RU PGND Cable
An RU PGND cable connects an RU and a ground bar, ensuring the proper grounding of the
RU. The maximum length of an RU PGND cable is 8 m (26.25 ft).
3.3 RU Power Cable
The RU power cable is a -48 V DC shielded cable. It feeds -48 V DC power to an RU. The
length of power supply that an RU power cable supports is 100 m (328.08 ft) by default.
3.4 RU Alarm Cable
The RU alarm cable, a shielded straight-through cable, transmits alarm signals from an
external device to an RU so that the base station monitors the operating status of external
devices. The RU alarm cable is 5 m (16.4 ft).
3.5 CPRI Fiber Optic Cable
CPRI fiber optic cables are classified into multimode fiber optic cables and single-mode fiber
optic cables. They transmit CPRI signals.
3.6 RU RF Jumper
The 1/2" RU RF jumper transmits and receives RF signals between an RU and an antenna. A
fixed-length RF jumper used by an RU is 2 m (6.56 ft), 3 m (9.84 ft), 4 m (13.12 ft), 6 m
(19.68 ft), or 10 m (32.81 ft). A variable-length RF jumper used by an RU has a maximum
length of 10 m (32.81 ft).
3.7 RU AISG Multi-Wire Cable
An RU AISG multi-wire cable connects an RU and an RCU to transmit control signals from a
base station to an RET antenna. When the RU is connected to the RET antenna, an AISG
multi-wire cable transmits RS485 signals. The length of the AISG multi-wire cable is 5 m
(16.40 ft).
3.8 RU AISG Extension Cable
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3 RU Cables
When the distance between an RU and an RCU is longer than 5 m (16.4 ft), an AISG
multi-wire cable is not long enough to connect the RU and the RCU. In this case, an AISG
extension cable is used to extend the AISG multi-wire cable for transmitting RS485 signals.
The length of the AISG extension cable is 15 m (49.21 ft).
3.1 RU Cable List
This section describes RU cable connections.
Table 3-1 lists RU cables.
Table 3-1 RU cables
Cable
One End
The Other End
Connector
Installation
Position
Connector
Installation
Position
3.2 RU
PGND Cable
OT terminal
(M6, 16 mm2 or
0.025 in.2)
Ground
terminal on the
RU
OT terminal
(M8, 16 mm2 or
0.025 in.2)
Ground terminal
on the ground bar
3.3 RU
Power Cable
Tool-less female
connector
(pressfit type)
NEG(-) and
RTN(+) ports
on the RU
Depending on
the power supply
equipment
External power
equipment
3.4 RU
Alarm Cable
DB15
waterproof male
connector
EXT_ALM
port on the RU
Cord end
terminal
External alarm
device
3.5 CPRI
Fiber Optic
Cable
DLC connector
CPRI0 port on
the RU
DLC connector
CPRI port on a
board in the BBU
3.6 RU RF
Jumper
DIN male
connector
ANT_TX/RX
A,
ANT_TX/RX
B, ANT_RXC,
or ANT_RXD
port on the RU
DIN male
connector
Antenna system
3.7 RU
AISG
Multi-Wire
Cable
DB9 waterproof
male connector
RET port on
the RU
Standard AISG
female connector
Standard AISG
male connector
on the RCU or on
the AISG
extension cable
3.8 RU
AISG
Extension
Cable
Standard AISG
male connector
Standard AISG
female
connector on
the AISG
multi-wire
cable
Standard AISG
female connector
Standard AISG
male connector
on the RCU
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3 RU Cables
3.2 RU PGND Cable
An RU PGND cable connects an RU and a ground bar, ensuring the proper grounding of the
RU. The maximum length of an RU PGND cable is 8 m (26.25 ft).
Exterior
A PGND cable is green or green and yellow with a cross-sectional area of 16 mm2 (0.025 in.2).
An OT terminal is installed at each end of the cable. Figure 3-1 shows a PGND cable.
Figure 3-1 PGND cable
(1) OT terminal (M6, 16 mm2 or 0.025 in.2)
(2) OT terminal (M8, 16 mm2 or 0.025 in.2)
If the customer prepares the PGND cable, a copper-core cable with a cross-sectional area of 16 mm2
(0.025 in.2) or larger is recommended.
One OT terminal must be added to each end of the PGND cable onsite.
You can determine the color of the cable and whether to use corresponding two-hole OT terminals
based on local regulations.
Figure 3-2 shows a two-hole OT terminal.
Figure 3-2 Two-hole OT terminal
3.3 RU Power Cable
The RU power cable is a -48 V DC shielded cable. It feeds -48 V DC power to an RU. The
length of power supply that an RU power cable supports is 100 m (328.08 ft) by default.
Issue 03 (2014-01-20)
The maximum length of power supply that an RU power cable supports is 150 m (492.12 ft).
Contact Huawei engineers when an RU power cable greater than 50 m (164.04 ft) is required.
If a power device provided by the customer is used, the recommended specification of the circuit
breaker on this power device is 15 A to 30 A.
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Exterior
There are three types of RU power cables in terms of cross-sectional areas: 3.3 mm2 (0.005
in.2) (12 AWG) and 5.3 mm2 (0.008 in.2) (10 AWG) complying with North American
standards and 4 mm2 (0.006 in.2) complying with European standards.
A tool-less female connector (pressfit type) needs to be added to one end of the RU power
cable and a corresponding terminal needs to be added to the other end based on the
requirements of the connector on the external power device, as shown in Figure 3-3.
Figure 3-3 RU power cable
(1) -48 V DC power cable
(3) Tool-less female
connector (pressfit type)
(2) Shield layer
Table 3-2 lists the specifications of an RU power cable.
Table 3-2 Specifications of an RU power cable
Cable
RU
power
cable
Wire Color in Most
Regions
Wire Color in Other Regions
North
American
Standard
Europea
Standar
UK
RTN(+)
Black
Brown
Blue
NEG(-)
Blue
Blue
Gray
Wire
3.4 RU Alarm Cable
The RU alarm cable, a shielded straight-through cable, transmits alarm signals from an
external device to an RU so that the base station monitors the operating status of external
devices. The RU alarm cable is 5 m (16.4 ft).
Exterior
An alarm cable has a DB15 waterproof male connector at one end and eight cord end
terminals at the other end, as shown in Figure 3-4.
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Figure 3-4 Alarm cable
(1) DB15 waterproof male connector
(2) Cord end terminal
Pin Assignment
Table 3-3 describes the pin assignment for the wires of an RU alarm cable.
Table 3-3 Pin assignment for the wires of an RU alarm cable
RU
Alarm
Port
Pin of the
Waterpro
ofed
DB15
Male
Connecto
Color
Type
Cord End
Terminal
Description
Dry
contact
X1.2
White and
blue
Twisted
pair
X2
SWITCH_INPUT0+
X1.3
Blue
X3
SWITCH_INPUT0(GND)
X1.6
White and
orange
X4
SWITCH_INPUT1+
X1.7
Orange
X5
SWITCH_INPUT1(GND)
X1.10
White and
green
X6
APM RX-
X1.11
Green
X7
APM RX+
X1.13
White and
brown
X8
APM TX-
X1.14
Brown
X9
APM TX+
RS485
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Twisted
pair
Twisted
pair
Twisted
pair
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3.5 CPRI Fiber Optic Cable
CPRI fiber optic cables are classified into multimode fiber optic cables and single-mode fiber
optic cables. They transmit CPRI signals.
Multimode fiber optic cables connect the BBU and RU or interconnect two RUs. The
maximum length of the multimode fiber optic cable between the BBU and RU is 150 m
(492.12 ft) and the multimode fiber optic cable between two RUs has a fixed length of 10 m
(32.81 ft).
A single-mode fiber optic cable consists of the single-mode pigtail and trunk single-mode
fiber optic cable, and the single-mode pigtail and trunk single-mode fiber optic cable are
interconnected using the ODF. The maximum length of the single-mode pigtail is 20 m (65.62
ft) on BBU side and 70 m (229.66 ft) on RU side.
The ODF and trunk single-mode fiber optic cable are provided by the customer and must comply
with the ITU-T G.652 standard.
The ODF is an outdoor transfer box for fiber optic cables, which interconnects the single-mode
pigtail and trunk single-mode fiber optic cable.
A multimode fiber optic cable and a single-mode fiber optic cable are connected to a multimode
optical module and a single-mode optical module, respectively.
Exterior
Multimode fiber optic cable: The multimode fiber optic cable has a DLC connector at each
end, as shown in Figure 3-5.
Figure 3-5 Multimode fiber optic cable
(1) DLC connector
(2) Breakout cable
(3) Label on the breakout cable
When a multimode fiber optic cable connects a BBU and an RU, the breakout cable on the BBU side
is 0.34 m (1.12 ft) and the breakout cable on the RU side is 0.03 m (0.098 ft).
When a multimode fiber optic cable connects two RUs, the breakout cable on both sides is 0.03 m
(0.098 ft).
Figure 3-6 shows the connection of the multimode fiber optic cable between a BBU and an
RU.
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Figure 3-6 Connection of the multimode fiber optic cable between a BBU and an RU
(1) Multimode fiber optic cable between a BBU and an RU
Single-mode pigtail: The single-mode pigtail has a DLC connector at one end and an FC, LC,
or SC connector at the other end, as shown in Figure 3-7.
Figure 3-7 Single-mode pigtail
(1) DLC
connector
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(2)
Breakout
cable
(3) Label on the
breakout cable
(4) FC
connector
(5) LC
connector
(6) SC
connector
When a single-mode pigtail connects a BBU and an ODF, the breakout cables on the BBU side and
ODF side are 0.34 m (1.12 ft) and 0.8 m (2.62 ft), respectively.
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When a single-mode pigtail connects an RU and an ODF, the breakout cables on the RU side and
ODF side are 0.03 m (0.098 ft) and 0.8 m (2.62 ft), respectively.
Figure 3-8 shows the connection of the single-mode pigtail.
Figure 3-8 Connection of the single-mode pigtail
(1) Single-mode pigtail between a BBU and
an ODF
(2) Single-mode pigtail between an RU and
an ODF
Selection Principles
The following table describes the principles for selecting CPRI fiber optic cables.
Table 3-4 Principles for selecting CPRI fiber optic cables
Remote
Distance
Selection Principle
Remarks
Less than or
equal to 100
m (328.08 ft)
Multimode fiber optic cable
Connects the BBU and RU
Greater than
100 m
(328.08 ft)
and equal to
or less than
150 m
(492.12 ft)
Multimode fiber optic cable
Connects the BBU and RU
Recommended: single-mode
fiber optic cable
(single-mode pigtail and
trunk single-mode fiber optic
cable)
The single-mode pigtail at the RU or BBU
side is connected to the trunk single-mode
fiber optic cable using the ODF.
Greater than
150 m
(492.12 ft)
Single-mode fiber optic cable
(single-mode pigtail and
trunk single-mode fiber optic
cable)
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When it connects two RUs, the distance
between the two RUs must be equal to or
less than 10 m (32.81 ft).
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Pin Assignment
Table 3-5 describes the labels on and recommended connections for the breakout cables of a
CPRI fiber optic cable.
Table 3-5 Labels on and recommended connections for the breakout cables of a CPRI fiber optic
cable
Label
Installation Position
Multimode Fiber
Optic Cable
Between a BBU
and an RU
Multimode Fiber
Optic Cable
Between Two RUs
Single-Mode Pigtail
1A
CPRI RX port on the
RU
CPRI RX port on
RU 1
RX port on the BBU or
CPRI RX port on the
RU
1B
CPRI TX port on the
RU
CPRI TX port on
RU 1
TX port on the BBU or
CPRI TX port on the
RU
2A
TX port on the BBU
CPRI TX port on
RU 0
ODF
2B
RX port on the BBU
CPRI RX port on
RU 0
ODF
3.6 RU RF Jumper
The 1/2" RU RF jumper transmits and receives RF signals between an RU and an antenna. A
fixed-length RF jumper used by an RU is 2 m (6.56 ft), 3 m (9.84 ft), 4 m (13.12 ft), 6 m
(19.68 ft), or 10 m (32.81 ft). A variable-length RF jumper used by an RU has a maximum
length of 10 m (32.81 ft).
When the distance between an RU and an antenna is less than 10 m (32.81 ft), one end of the RF
jumper is connected to the ANT-TX/RXA or ANT-TX/RXB port at the bottom of the RU, and the
other end is connected to the antenna.
When the distance between an RU and an antenna is greater than 10 m (32.81 ft), one end of the RF
jumper is connected to a feeder, and the other end is connected to the antenna.
If the customer prepares the RF jumper, the length of the RF jumper should be as short as possible
and not exceed 2 m (6.56 ft.).
Exterior
An RF jumper has a DIN male connector at one end and a customized connector at the other
end.
Figure 3-9 shows an RF jumper with a DIN male connector at each end.
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3 RU Cables
Figure 3-9 RF jumper
(1) DIN male connector
3.7 RU AISG Multi-Wire Cable
An RU AISG multi-wire cable connects an RU and an RCU to transmit control signals from a
base station to an RET antenna. When the RU is connected to the RET antenna, an AISG
multi-wire cable transmits RS485 signals. The length of the AISG multi-wire cable is 5 m
(16.40 ft).
An RCU is a driving motor used for the phase shifter in the RET antenna. It receives control commands
from a base station and runs the commands to drive the stepper motor. Using a gear, the stepper motor
drives the adjustable phase shifter in the antenna and changes the downtilt angle.
Exterior
An AISG multi-wire cable has a waterproofed DB9 male connector at one end and a standard
AISG female connector at the other end, as shown in Figure 3-10.
Figure 3-10 AISG multi-wire cable
(1) Waterproofed DB9 male connector
(2) Standard AISG female connector
Pin Assignment
Table 3-6 describes the pin assignment for the wires of an AISG multi-wire cable.
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Table 3-6 Pin assignment for the wires of an AISG multi-wire cable
X1 End (Pin of
the
Waterproofed
DB9 Male
Connector)
X1.1
X2 End (Pin of the
Standard AISG
Female Connector)
X2.1
Color
White and
blue
Type
Description
Twisted
pair
+12 V
Blue
X1.3
X2.3
White and
orange
RS485 B
Twisted
pair
X1.5
X2.5
Orange
RS485 A
X1.4
X2.4
White and
green
GND
X1.9 and X1.4 are
interconnected.
GND
X2.1 and X2.6 are
interconnected.
+12 V
X2.4 and X2.7 are
interconnected.
GND
3.8 RU AISG Extension Cable
When the distance between an RU and an RCU is longer than 5 m (16.4 ft), an AISG
multi-wire cable is not long enough to connect the RU and the RCU. In this case, an AISG
extension cable is used to extend the AISG multi-wire cable for transmitting RS485 signals.
The length of the AISG extension cable is 15 m (49.21 ft).
Exterior
An AISG multi-wire cable has a standard AISG male connector at one end and a standard
AISG female connector at the other end, as shown in Figure 3-11.
Figure 3-11 AISG extension cable
(1) Standard AISG male connector
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(2) Standard AISG female connector
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Pin Assignment
Table 3-7 describes the pin assignment for the wires of an AISG extension cable.
Table 3-7 Pin assignment for the wires of an AISG extension cable
X1 End (Pin
of the
Standard
AISG Male
Connector)
X2 End (Pin
of the
Standard
AISG
Female
Connector)
Color
Type
Description
X1.1
X2.1
White and blue
Twisted pair
+12 V
Twisted pair
DC Return
Twisted pair
RS485 B
Blue
X1.7
X2.7
White and
orange
Orange
X1.3
X2.3
White and green
X1.5
X2.5
Green
X1.6
X2.6
White and brown
RS485 A
Twisted pair
+24 V
Brown
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4 RF Cable Connections for the RU3260
RF Cable Connections for the RU3260
RF cable connections for the RU vary depending on the configurations of the RU and
antenna.
Description of RF Cable Connections
This section describes the RF cable connections for the RU serving a single sector. The
following table lists the RF cable connections for the RU.
Table 4-1 RF cable connections for the RU
RU Model
Specifications of a
Single RU
Scenario
Illustration of
Cable
Connections
RU3260
For details, see section
"Typical Power
Configuration for RU
Modules" in chapter
"Configuration
Reference" in 3900
Series Base Station
Initial Configuration
Guide.
2T4R
See Figure 4-1.
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4 RF Cable Connections for the RU3260
Illustration of Cable Connections
Figure 4-1 RF cable connections for the RU
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5 RU Auxiliary Devices
RU Auxiliary Devices
About This Chapter
This chapter describes RU auxiliary devices.
5.1 IFS06
An Indoor Floor installation Support (IFS06) is used for installing indoor RUs.
5.2 OCB
An Outdoor Cable Conversion Box (OCB) interconnects cables of different core diameters.
Power cables shipped with RUs cannot support long-distance power supply. Therefore, when
power supply is far from the equipment, cables with large core diameters are used, and an
OCB connects these cables and RU power cables.
5.1 IFS06
An Indoor Floor installation Support (IFS06) is used for installing indoor RUs.
Exterior
Figure 5-1 shows an IFS06.
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Figure 5-1 IFS06
(1) Cable tray
(2) Ground bar 2
(3) Rear foot
(4) Front foot
(5) Adjustable beam
(6) Ground bar 1
(7) Main frame
Function
It can be installed on the ground.
The upper and lower adjustable beams on an IFS06 can be moved up and down to fit for
heights of RUs.
RUs can be installed on an IFS06 only when the ambient temperature is higher than or
equal to the lowest working temperature of the RU and at least 5°C (41°F) lower than the
highest working temperature of the RU. In this scenario, the IFS06 supports at least three
RUs. When the ambient temperature is higher than or equal to the lowest working
temperature of the RU and at least 10°C (50°F) lower than the highest working
temperature of the RU, the IFS06 supports a maximum of six RUs.
For details about the operating temperature of the RU, see section "Technical Specifications of RUs" in
3900 Series Base Station Technical Description.
Specifications
Table 5-1 describes IFS06 specifications.
Table 5-1 IFS06 specifications
Item
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Specification
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5 RU Auxiliary Devices
Item
Specification
Dimensions (H x W x D)
1730 mm (79 in.) x 600 mm (23.62 in.) x 600 mm (23.62
in.)
Weight
45 kg (99.23 lb)
5.2 OCB
An Outdoor Cable Conversion Box (OCB) interconnects cables of different core diameters.
Power cables shipped with RUs cannot support long-distance power supply. Therefore, when
power supply is far from the equipment, cables with large core diameters are used, and an
OCB connects these cables and RU power cables.
Application Scenario of an OCB
Figure 5-2 shows the application scenario of an OCB.
Figure 5-2 Application scenario of an OCB
For details about the structure, functions, installation, and maintenance of an OCB, see the
OCB User Guide or OCB–01M User Guide.
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