AAU3920
Hardware Description Issue
02
Date
2015-07-30
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2015. 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.
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Website:
http://www.huawei.com
Email:
[email protected]
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AAU3920 Hardware Description
About This Document
About This Document Overview This document provides reference information for deploying AAU3920s (shortened to AAUs). Such information includes the AAU exterior, ports and indicators on an AAU, logical structure, engineering specifications, and cable types. The exteriors of components or cables in this document are for reference only. The actual exteriors may be different.
Product Version The following table lists the product versions related to this document. Product Name
Solution Version
Product Version
DBS3900
l SRAN9.0, SRAN10.1 and later
V100R009C00, V100R010C10 and later
l GBSS16.0, GBSS17.1 and later l RAN16.0, RAN17.1 and later l eRAN7.0, eRAN8.1 and later
Intended Audience l
System personnel
l
Installation engineers
l
Maintenance engineers
Organization 1 Changes in AAU3920 Hardware Description Issue 02 (2015-07-30)
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AAU3920 Hardware Description
About This Document
This chapter describes the changes in AAU3920 Hardware Description. 2 AAU Introduction This chapter describes the exterior, functions, slot assignment, ports, indicators, remote electrical tilt (RET) system, and engineering specifications of an AAU. 3 Optical Modules An optical module transmits optical signals between an optical port and a fiber optic cable. 4 AAU Cables This chapter describes AAU cables.
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 The general conventions that may be found in this document are defined as follows.
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Convention
Description
Times New Roman
Normal paragraphs are in Times New Roman.
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AAU3920 Hardware Description
About This Document
Convention
Description
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 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. Issue 02 (2015-07-30)
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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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AAU3920 Hardware Description
Contents
Contents About This Document.....................................................................................................................ii 1 Changes in AAU3920 Hardware Description..........................................................................1 2 AAU Introduction..........................................................................................................................2 2.1 Exterior of an AAU........................................................................................................................................................3 2.2 Functions of an AAU......................................................................................................................................................5 2.3 Configurations of an AAU.............................................................................................................................................7 2.4 Ports and Indicators on an AAU.....................................................................................................................................9 2.5 RET System of an AAU...............................................................................................................................................14 2.6 Engineering Specifications of an AAU........................................................................................................................17
3 Optical Modules..........................................................................................................................18 4 AAU Cables..................................................................................................................................20 4.1 AAU Cable List............................................................................................................................................................21 4.2 AAU PGND Cable.......................................................................................................................................................22 4.3 AAU Power Cable........................................................................................................................................................23 4.4 CPRI Fiber Optic Cable................................................................................................................................................24 4.5 Feeder...........................................................................................................................................................................28 4.6 AISG Multi-Wire Cable...............................................................................................................................................29 4.7 AISG Extension Cable..................................................................................................................................................30
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1
1 Changes in AAU3920 Hardware Description
Changes in AAU3920 Hardware Description This chapter describes the changes in AAU3920 Hardware Description.
02 (2015-07-30) This is the second commercial release. Compared with the issues 01 (2015-03-23), this issue does not include any new topics or exclude any topics. Compared with the issues 01 (2015-03-23), this issue includes the following changes. Topic
Change Description
The whole document
Some figure updates caused by the structure modification of the AAU.
01 (2015-03-23) This is the first commercial release. Compared with the issues Draft A (2015-01-15), this issue does not include any changes.
Draft A (2015-01-15) This is a draft.
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AAU3920 Hardware Description
2 AAU Introduction
2
AAU Introduction
About This Chapter This chapter describes the exterior, functions, slot assignment, ports, indicators, remote electrical tilt (RET) system, and engineering specifications of an AAU. 2.1 Exterior of an AAU This section describes the exterior, dimensions, and components of an AAU. 2.2 Functions of an AAU The function of an AAU is performed by the functional modules (AU and RU). 2.3 Configurations of an AAU This section describes the configuration of an AAU. 2.4 Ports and Indicators on an AAU This section describes ports and indicators on an AAU. 2.5 RET System of an AAU The remote electrical tilt (RET) system of an AAU consists of the remote control unit (RCU), motor, gearing, and phase shifter. In the RET system, the RCU is used to remotely adjust the downtilts of AU beams. 2.6 Engineering Specifications of an AAU This section describes engineering specifications of an AAU, including input power and equipment specifications.
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AAU3920 Hardware Description
2 AAU Introduction
2.1 Exterior of an AAU This section describes the exterior, dimensions, and components of an AAU.
Exterior The following figure shows the exterior of an AAU. Figure 2-1 Exterior of an AAU
Dimensions The following figure shows the dimensions of an AAU.
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Figure 2-2 Dimensions of an AAU
Components NOTE
l Active antenna-antenna unit (AAAU): the antenna unit on an active antenna (shortened to AU) l Active antenna-radio unit (AARU): the radio unit on an active antenna (shortened to RU)
An AAU has one composition, that is, one RU is configured on an AU. The following figure shows the composition.
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Figure 2-3 AAU composition
(1) AU
(2) RU
2.2 Functions of an AAU The function of an AAU is performed by the functional modules (AU and RU). The following figure shows the logical structure of an AAU.
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Figure 2-4 Logical structure of an AAU
The following table describes the functions of an AU and an RU. Functional Module
Description
AU
An AU uses two groups of high-frequency antennas, which are shared by the active and passive modules through a combiner. An AU performs the following functions: l Provides AU arrays, RF combination, feed power, phase shift network, and drive system. l Provides built-in remote control units (RCUs) that can control circuits. l Provides the power supply channel and communication ports between an AU and an RU. l Provides ports for AAU mounting kits. l Provides ports for connecting to passive RF modules operating in 2.6 GHz.
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Functional Module
Description
RU
An RU uses the wideband technology and supports ultra wideband of 1800 MHz and 2100 MHz. It can be configured with only the 1800 MHz frequency band, only the 2100 MHz frequency band, or both the 1800 MHz and 2100 MHz frequency bands. An RU performs the following functions: l Receives downlink baseband data from the BBU and sends uplink baseband data to the BBU. l On the RX channel, down-converts RF signals into IF signals, amplifies them, and performs analog-to-digital conversion (ADC). On the TX channel, filters out downlink signals, performs digital-to-analog conversion (DAC), up-converts RF signals to the TX band, combines wideband signals of the 1.8 GHz and 2.1 GHz frequency bands, and performs dead peer detection (DPD). l Multiplexes receive signals and transmits signals on the RF channel. l Provides CPRI ports for CPRI convergence and distribution and a -48 V DC port. l Protects and filters out RF signals.
2.3 Configurations of an AAU This section describes the configuration of an AAU. The following figure shows the slot in an AAU.
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Figure 2-5 Slot in an AAU
Slot 1: RU
Configuration of Active Modules for an AAU The following table lists the configuration of active modules for an AAU. Table 2-1 Configuration of active modules for an AAU
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Configured Module
Model
Maximum Quantity
Optional/ Mandatory
Configuration Description
RU
RUa3920
1
Mandatory
The RU can work in GUL, GL, UL, LTE FDD, or UMTS mode.
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2 AAU Introduction
Configuration of Passive Modules for an AAU Active and passive modules share the electrical tilt. When each active module is configured with only one frequency band and each passive module is configured with two TX channels and two or four RX channels, TX channels of active modules and passive modules need to be configured on different antenna arrays. The following figure shows the passive configurations of an AAU. Figure 2-6 Configurations of passive modules for an AAU
l
1.8A+2.6P(2T2R/2T4R): TX/RX ports on an RFU or RRU are connected to the 2500-2690 (yL)(+) and 2500-2690(yL)(-) ports and RX ports on the RFU or RRU are connected to the 2500-2690(yyR)(+) and 2500-2690(yyR)(-) ports at the bottom of the AAU.
l
1.8A+2.6P(2T2R/2T4R): TX/RX ports on an RFU or RRU are connected to the 2500-2690 (yyR)(+) and 2500-2690(yyR)(-) ports and RX ports on the RFU or RRU are connected to the 2500-2690(yL)(+) and 2500-2690(yL)(-) ports at the bottom of the AAU.
l
1.8A/2.1A/(1.8+2.1)A+2.6P(4T4R): Cables are connected according to principles in the configuration of 4T4R.
2.4 Ports and Indicators on an AAU This section describes ports and indicators on an AAU. The following figure shows ports and indicators on an AAU.
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Figure 2-7 Ports and indicators on an AAU
(1) Ports on an RU
(2) Ports on an AU
(3) Indicators on an RU
Ports The following table describes the ports on an AAU. Item
Silkscreen
Description
Ports on an RU
PWR
-48 V DC power supply port
RX TX CPRI0
Optical/electrical port 0
RX TX CPRI1
Optical/electrical port 1
2500-2690(yL)(-)
RF ports connected to the ANT ports on an external RF module operating in 2.6 GHz
Ports on an AU
2500-2690(yL)(+) 2500-2690(yyR)(-) Issue 02 (2015-07-30)
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Item
Silkscreen
Description
2500-2690(yyR)(+) AISG IN
RET antenna port connected to the RET port on an external RF module
AISG OUT
RET antenna cascading port connected to the RET antenna port on an external RET antenna so that downtilts of cascaded antennas can be adjusted
Indicators The following table describes the indicators on an AAU. Item
Indicator
Color
Status
Description
Indicators on an RU
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 module 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.
Steady off
No alarm is generated.
ALM
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Red
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Item
Indicator
ACT
CPRI0
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Color
Green
Red or green
Status
Description
Blinking (on for 1s and off for 1s)
An alarm is generated, and the alarm may be caused by a fault on an associated module or port. Therefore, you need to locate the fault before determining whether to replace the module.
Steady on
The module is functioning properly with TX channels enabled.
Blinking (on for 1s and off for 1s)
The module is functioning properly with TX channels disabled.
Steady green
The CPRI link is functioning properly.
Steady red
An optical module fails to receive or transmit signals because the optical module is faulty or the fiber optic cable is broken.
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Item
Indicator
CPRI1
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Color
Red or green
Status
Description
Blinking red (on for 1s and off for 1s)
The CPRI link is out of lock because clocks of two radio systems are not synchronized or the data rate negotiation over CPRI ports fails. You are advised to check the system configuration to locate the cause.
Steady off
The small formfactor pluggable (SFP) module is not properly installed, or the optical module is powered off.
Steady green
The CPRI link is functioning properly.
Steady red
An optical module fails to receive or transmit signals because the optical module is faulty or the fiber optic cable is broken.
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Item
Indicator
Color
Status
Description
Blinking red (on for 1s and off for 1s)
The CPRI link is out of lock because clocks of two radio systems are not synchronized or the data rate negotiation over CPRI ports fails. You are advised to check the system configuration to locate the cause.
Steady off
The SFP module is not properly installed, or the optical module is powered off.
2.5 RET System of an AAU The remote electrical tilt (RET) system of an AAU consists of the remote control unit (RCU), motor, gearing, and phase shifter. In the RET system, the RCU is used to remotely adjust the downtilts of AU beams.
RET Function The RCU in the RET system of an AAU receives control signals from the base station and drives the gearing in the AU through the step motor to drive the phase shifter in the AU, thereby adjusting the downtilt of the AU. The following figure shows the working principle of the RET system of an AAU. Figure 2-8 Working principle of the RET system of an AAU
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RET Configuration Principles The RET configuration principles are as follows: l
The serial numbers of logical RCUs, which do not have links, can be scanned by any RET ports.
l
Links have no priority, and apply the first-come first-served principle. Only one AISG link can be established for an RCU serial number. If a link needs to be switched, you must delete the configuration on the link so that the link can be released.
l
After the RCU link is established, the RCU serial number is not displayed in the scanning result of other RET ports.
The following table lists the RET configurations of active modules for an AAU. Table 2-2 RET configurations of active modules for an AAU Scenario
Frequency Band
RCU L
RCU R
2T4R/2T2R
1.8A
2T2R
2R
2.1A
2R
2T2R
1.8A
2T2R
-
2.1A
-
2T2R
2T2R/4R+2T2R/4R
The following table lists the RET configurations of passive modules for an AAU. Table 2-3 RET configurations of passive modules for an AAU Scenario
Frequency Band
RCU L
RCU R
2T2R/2T4R/4T4R
1.8A
1.8A (2T2R)
2.6P (2T2R)
2T2R/2T4R/4T4R
2.1A
2.6P (2T2R)
2.1A (2T2R)
RCU Serial Numbers An AAU has two RCU serial numbers, which are printed on the AU label and uniquely identify the RCU. An RCU serial number has 19 characters and its encoding scheme is as follows: Company code (2 digits) + Device type (7 digits) + Reserved field (2 digits) + Year (1 digit) + Month (1 digit) + Sequence number (4 digits) + DIN position (1 digit) + array position (1 digit). The following table describes the meaning of each field in an RCU serial number.
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Table 2-4 Meaning of each field in an RCU serial number Digit Number (from Left to Right)
Field Meaning
Field Description
1 to 2
Company code
Always set to HW
3 to 9
Device type
Always set to AAU3920
10 to 11
Reserved field
Generated randomly
12
Year in which the product is produced
One character is used to represent the last two digits of a year. l For example, characters 1 to 9 are used to represent the last two digits of the years 2001 to 2009, respectively. l The 26 letters from A to Z are used to represent the years starting from 2010. The letter A represents 2010 and the subsequent letters represent the years following 2010.
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Month in which the product is produced
For example, characters 1 to 9 represent January to September, respectively. A represents October, B represents November, and C represents December.
14 to 17
Sequence number
It is generated in the production process.
18
DIN position
It represents the position of RF ports which are counted from the bottom of an AU. 0 represents the bottom of the AU. The digits 1 and 3 are reserved.
19
Array position
0 represents the lowfrequency (790 MHz to 960 MHz) array and 1 represents the high-frequency (1710 MHz to 2690 MHz) array.
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2.6 Engineering Specifications of an AAU This section describes engineering specifications of an AAU, including input power and equipment specifications.
Input Power Specifications The following table lists input power specifications of an AAU. Table 2-5 Input power specifications of an AAU Input Power
Voltage Range
-48 V DC
-36 V DC to -57 V DC
Equipment Specifications The following table lists the equipment specifications of an AAU. Table 2-6 Equipment specifications of an AAU Item
Specifications
Dimensions (H x W x D)
AAU: 1450 mm x 320 mm x 188 mm (57.09 in. x 12.60 in. x 7.40 in.) (excluding the attachment plate)
Weight
l Main module: 35 kg (77.18 lb) l Handles and decorating plates: 3 kg (6.62 lb) l Mounting kits: 6.7 kg (14.77 lb)
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AAU3920 Hardware Description
3 Optical Modules
3
Optical Modules
An optical module transmits optical signals between an optical port and a fiber optic cable. NOTE
l 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. l Boards or RF modules supporting only the 1.25 Gbit/s CPRI port rate, for example, the GTMU or RRU3908 V1, cannot use optical modules supporting a 9.8 Gbit/s CPRI port rate.
Exterior The following figure shows the exterior of an optical module. Figure 3-1 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.
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3 Optical Modules
Figure 3-2 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: l
The puller of a single-mode optical module is blue and the puller of a multimode optical module is black or gray.
l
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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AAU3920 Hardware Description
4 AAU Cables
4
AAU Cables
About This Chapter This chapter describes AAU cables. 4.1 AAU Cable List This section describes the connector types and installation positions of AAU cables, providing reference for cable installation and replacement. 4.2 AAU PGND Cable An AAU PGND cable connects an AAU and an external ground bar for proper grounding of the AAU. The maximum length of an AAU PGND cable is 8 m (26.25 ft). 4.3 AAU Power Cable An AAU power cable feeds external -48 V DC power into an AAU. The maximum length of an AAU power cable between the AAU and its power supply is 100 m (328.08 ft). 4.4 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. 4.5 Feeder A feeder connects an RRU and an AAU and transmits signals between the base station and the antenna system. 4.6 AISG Multi-Wire Cable An AISG multi-wire cable connects an RRU and an AAU to transmit control signals from a base station to an RET antenna. When the RRU is connected to the RET antenna, an AISG multiwire cable transmits RS485 signals. The length of an AISG multi-wire cable is 5 m (16.40 ft). 4.7 AISG Extension Cable When the distance between an RRU and an AAU is longer than 5 m (16.4 ft), an AISG multiwire cable is not long enough to connect the RRU and the AAU. In this case, an AISG extension cable is used to extend the AISG multi-wire cable. An AISG extension cable is 15 m (49.21 ft).
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AAU3920 Hardware Description
4 AAU Cables
4.1 AAU Cable List This section describes the connector types and installation positions of AAU cables, providing reference for cable installation and replacement. The following table lists AAU cables. Table 4-1 AAU cables list Cable
One End
The Other End
Connector
Installation Position
Connector
Installation Position
AAU PGND Cable
OT terminal (M6, 16 mm2 or 0.025 in.2)
Primary ground terminal on the AAU
OT terminal (M8, 16 mm2 or 0.025 in.2)
External ground bar
AAU Power Cable
EPC5 connector
INPUT port on the AAU
Depending on the power equipment
External power equipment
CPRI Fiber Optic Cable
DLC connector
l CPRI0 port on the AAU
DLC connector
l CPRI port on the BBU
l CPRI1 port on the AAU
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l CPRI0 port on the cascaded AAU
RF Jumper
DIN male connector
2500-2690(yL) (+) or 2500-2690(yL) (-) port on the AAU; 2500-2690 (yyR)(+) or 2500-2690 (yyR)(-) on the AAU
AISG MultiWire Cable
DB9 waterproof male connector
RET port on the Standard AISG RRU female connector
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DIN male connector
RF port on the RRU or RFU
AISG IN port on the AAU or standard AISG male connector on the AISG extension cable
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4 AAU Cables
Cable
One End
AISG Extension Cable
The Other End
Connector
Installation Position
Connector
Installation Position
Standard AISG male connector
Standard AISG female connector on the AISG multiwire cable
Standard AISG female connector
AISG IN port on the AAU
4.2 AAU PGND Cable An AAU PGND cable connects an AAU and an external ground bar for proper grounding of the AAU. The maximum length of an AAU PGND cable is 8 m (26.25 ft). A PGND cable is a green or green and yellow cable. An OT terminal is installed at each end of the cable. The following figure shows the exterior of a PGND cable. Figure 4-1 Exterior of a PGND cable
(1) OT terminal (M6, 16 mm2 or 0.025 in.2)
(2) OT terminal (M8, 16 mm2 or 0.025 in.2)
NOTE
l If the customer prepares the PGND cable, a copper-core cable with a cross-sectional area of 16 mm2 (0.025 in.2) or greater is recommended. l One OT terminal must be added to each end of the PGND cable onsite. l You can determine the color of the cable and whether to use corresponding two-hole OT terminals based on local regulations.
The following figure shows a two-hole OT terminal. Figure 4-2 Two-hole OT terminal
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4 AAU Cables
4.3 AAU Power Cable An AAU power cable feeds external -48 V DC power into an AAU. The maximum length of an AAU power cable between the AAU and its power supply is 100 m (328.08 ft). NOTE
If the power equipment is provided by customers, the 20 A circuit breakers are recommended.
Exterior The following figure shows the exterior of an AAU power cable. The connector at one end of an AAU power cable is an EPC5 connector and the connector at the other end depends on the power equipment. Figure 4-3 AAU power cable
(1) EPC5 connector
Description The following table describes an AAU power cable. Table 4-2 Specifications of an AAU power cable Cable
Wire
Color of the Wire (North American Standard)
Color of the Wire (European Standard)
CrossSectional Area of the Wire
AAU power cable
RTN(+)
Black
Brown
l European standard: 6 mm2 (0.009 in.2), and 8 mm2 (0.012 in.2) l North American standard: 5.3 mm2 (0.008 in.2) (10
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Cable
Wire
Color of the Wire (North American Standard)
Color of the Wire (European Standard)
NEG(-)
Blue
Blue
CrossSectional Area of the Wire AWG) and 8.2 mm2 (0.013 in.2) (8 AWG)
4.4 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. A multimode fiber optic cable connecting a BBU and an AAU is 150 m (492.13 ft) long at most. A multimode fiber optic cable connecting two AAUs is 100 m (328.08 ft) long at most. A single-mode fiber optic cable consists of a single-mode pigtail and a trunk single-mode fiber optic cable, which are connected through an optical distribution frame (ODF). A single-mode pigtail is 20 m (65.62 ft) and 70 m (229.66 ft) long at most on the BBU and AAU sides, respectively. When the distance between two AAUs is longer than or equal to 100 m (328. 08 ft), a singlemode fiber optic cable is used. NOTE
l The ODF and trunk single-mode fiber optic cable are provided by the customer and must comply with the ITU-T G.652 standard. l The ODF is an outdoor transfer box for fiber optic cables, which interconnects the single-mode pigtail and trunk single-mode fiber optic cable. l 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 the following figure. Issue 02 (2015-07-30)
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Figure 4-4 Multimode fiber optic cable
(1) DLC connector
(2) Breakout cable
(3) Label on the breakout cable
NOTE
l When a multimode fiber optic cable connects a BBU and an AAU, the breakout cable on the BBU side is 0.34 m (13.39 in.) and the breakout cable on the AAU side is 0.03 m (1.18 in.). l When a multimode fiber optic cable connects two AAUs, the breakout cable on both sides is 0.03 m (1.18 in.).
The following figure shows the connection of a multimode fiber optic cable between a BBU and an AAU. Figure 4-5 Connection of a multimode fiber optic cable between a BBU and an AAU
(1) Multimode fiber optic cable between a BBU and an AAU
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 the following figure.
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Figure 4-6 Single-mode pigtail
(1) DLC connector (2) Breakout cable
(3) Label on the (4) FC connector (5) LC connector (6) SC connector breakout cable
NOTE
l When a single-mode pigtail connects a BBU and an ODM, the breakout cables on the BBU and ODM sides are 0.34 m (13.39 in.) and 0.8 m (31.50 in.), respectively. l When a single-mode pigtail connects an ODM and an AAU, the breakout cables on the AAU and ODM sides are 0.03 m (1.18 in.) and 0.8 m (31.50 in.), respectively.
The following figure shows the connection of a single-mode pigtail.
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Figure 4-7 Connection of a single-mode pigtail
(1) Single-mode pigtail between a BBU and an ODF
(2) Single-mode pigtail between an ODF and an AAU
(3) Single-mode pigtail between an ODM and an AAU -
Selection Principle The following table describes the principles for selecting CPRI fiber optic cables. Table 4-3 Principles for selecting CPRI fiber optic cables
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Remote Distance
Selection Principle
Remarks
Shorter than or equal to 100 m (328. 08 ft)
Multimode fiber optic cable
Connects a BBU and an AAU
Longer than 100 m (328.08 ft) and shorter than or equal to 150 m (492.12 ft)
Multimode fiber optic cable
Connects a BBU and an AAU
Recommended: single-mode fiber optic cable (single-mode pigtail and trunk single-mode fiber optic cable)
The single-mode pigtail on the BBU or AAU side is connected to the trunk singlemode fiber optic cable using an ODM.
Longer than 150 m (492.12 ft)
Single-mode fiber optic cable (single-mode pigtail and trunk single-mode fiber optic cable)
When it connects two AAUs, the distance between the two AAUs must be shorter than or equal to 100 m (328. 08 ft).
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Pin Assignment The following table describes the labels on and recommended connections for the breakout cables of a CPRI fiber optic cable. Table 4-4 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 or an ODF and an AAU
Multimode Fiber Optic Cable Between Two AAUs
Single-Mode Pigtail (Interconnected by an ODM)
1A
CPRI RX port on the AAU
CPRI RX port on AAU 1
RX port on the BBU or CPRI RX port on the AAU
1B
CPRI TX port on the AAU
CPRI TX port on AAU 1
TX port on the BBU or CPRI TX port on the AAU
2A
ODM or TX port on the BBU
CPRI TX port on AAU 0
ODM
2B
ODM or RX port on the BBU
CPRI RX port on AAU 0
ODM
4.5 Feeder A feeder connects an RRU and an AAU and transmits signals between the base station and the antenna system.
Exterior Figure 4-8 shows a feeder with a DIN male connector at each end. Figure 4-8 Exterior of a feeder
(1) DIN male connector
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4.6 AISG Multi-Wire Cable An AISG multi-wire cable connects an RRU and an AAU to transmit control signals from a base station to an RET antenna. When the RRU is connected to the RET antenna, an AISG multiwire cable transmits RS485 signals. The length of an AISG multi-wire cable is 5 m (16.40 ft). NOTE
l An AAU contains built-in remote control units (RCUs). l 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 commands to drive the stepper motor. Using a gear, the stepper motor drives the adjustable phase shifter in the antenna to change the downtilt of the antenna.
Exterior The following figure shows the exterior of an AISG multi-wire cable. Figure 4-9 Exterior of an AISG Multi-wire cable
(1) Waterproof DB9 male connector
(2) Standard AISG female connector
Description The following table describes an AISG multi-wire cable. Table 4-5 Description of an AISG multi-wire cable X1 End (Pin of the Waterproof DB9 Male Connector)
X1.1
X2 End (Pin of the Standard AISG Female Connector)
X2.1
Color
White and blue Blue
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X1.3
X2.3
White and orange
X1.5
X2.5
Orange
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Wire
Description
Twisted pair
+12 V
Twisted pair
RS485 B RS485 A 29
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X1 End (Pin of the Waterproof DB9 Male Connector)
X2 End (Pin of the Standard AISG Female Connector)
Color
Wire
Description
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
4.7 AISG Extension Cable When the distance between an RRU and an AAU is longer than 5 m (16.4 ft), an AISG multiwire cable is not long enough to connect the RRU and the AAU. In this case, an AISG extension cable is used to extend the AISG multi-wire cable. An AISG extension cable is 15 m (49.21 ft).
Exterior The following figure shows the exterior of an AISG extension cable. Figure 4-10 Exterior of AISG extension cable
(1) Standard AISG male connector
(2) Standard AISG female connector
Description The following table describes an AISG extension cable.
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Table 4-6 Description of an AISG Extension cable X1 End (Pin of the Standard AISG Male Connector)
X2 End (Pin of the Standard AISG Female Connector)
Color
Wire
Description
X1.1
X2.1
White and blue
Twisted pair
+12 V
Twisted pair
DC Return A
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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