AAU3920 Hardware Description (06) (PDF) - en
AAU3920 Hardware Description (06) (PDF) - en
AAU3920 Hardware Description (06) (PDF) - en
Hardware Description
Issue 06
Date 2019-09-10
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Contents
This document provides reference for planning and deploying an active antenna
unit 3920 (AAU3920, which is referred to as AAU in this document). It describes
the exterior, ports, indicators, logical structure, engineering specifications, and
cable types of the AAU.
The exteriors of components or cables in this document are for reference only. The
actual exteriors may be different.
Product Versions
The following table lists the product versions related to this document.
Intended Audience
This document is intended for:
● System engineers
● Installation engineers
● Maintenance engineers
Organization
1.1 Changes in AAU3920 Hardware Description
This chapter describes the changes in AAU3920 Hardware Description.
1.2 AAU
The AAU consists of the radio unit (RU) and antenna unit (AU).
1.3 AAU Cables
This chapter describes AAU cables.
06 (2019-09-10)
This is the sixth commercial release.
Compared with Issue 05 (2018-07-30), this issue does not include any new topics
or exclude any topics.
Compared with Issue 05 (2018-07-30), this issue includes the following changes.
05 (2018-07-30)
This is the fifth commercial release.
Compared with Issue 04 (2017-02-28), this issue does not include any new topics
or exclude any topics.
Compared with Issue 04 (2017-02-28), this issue includes the following changes.
04 (2017-02-28)
This is the fourth commercial release.
Compared with Issue 03 (2016-12-05), this issue does not include any new topics
or exclude any topics.
Compared with Issue 03 (2016-12-05), this issue includes the following changes.
03 (2016-12-05)
This is the third commercial release.
Compared with Issue 02 (2015-07-30), this issue does not include any new topics
or exclude any topics.
Compared with Issue 02 (2015-07-30), this issue includes the following changes.
● 1.2.4 AAU Ports and Indicators Added the description that the port at
● 1.2.2 AAU Functions the bottom of the AAU supports a
2300 MHz passive module.
● 1.2.5 AAU Combinations
● 1.2.6 AAU RET System
● 1.3.1 Cable List
02 (2015-07-30)
This is the second commercial release.
Compared with Issue 01 (2015-03-23), this issue does not include any new topics
or exclude any topics.
Compared with Issue 01 (2015-03-23), this issue includes the following changes.
01 (2015-03-23)
This is the first commercial release.
Compared with Draft A (2015-01-15), this issue does not include any changes.
Draft A (2015-01-15)
This is a draft.
1.2 AAU
The AAU consists of the radio unit (RU) and antenna unit (AU).
An AAU has one composition, that is, one RU is configured on an AU. Figure 1-3
shows the composition.
(1) AU (2) RU
You can obtain the module name, part number, and power supply information of
the AAU on the nameplate on the rear of the AAU, as shown in the following
figure.
NOTE
Input Power
The following table lists the input power specifications of an AAU.
Equipment Specifications
The following table lists the dimensions and weight of an AAU.
Power Consumption
The following table lists the power consumption of an AAU.
AAU3920 600 W
NOTE
The maximum power consumption is measured when the ambient temperature is 25°C
(77°F) and the load is 100%. The actual power consumption has a 10% deviation from this
value.
Ports
The following figure shows the ports on an AAU.
2300-2690(yyR)(+)
Indicators
The following table describes the indicators on an AAU.
NOTE
a ● 1800 MHz A
● 2100 MHz A
● (1800 MHz+2100 MHz) A
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.
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.
For the RET control scheme of the AAU and detailed engineering guidelines, see ALD
Management Feature Parameter Description in SingleRAN feature documentation.
● The serial numbers of logical RCUs, which do not have links, can be scanned
by any RET ports.
● Links are not prioritized, and the first-come first-served principle applies to
the links. 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.
● After the RCU link is established, the RCU serial number is not displayed in
the scanning result of other RET ports.
● Active and passive modules share the electrical tilt. When each active module
is configured with only one frequency band and each passive module is
Table 1-6 Mapping between the AU arrays and the TX and RX channels of the RUs
Configurati RU (A) High- Array Position (TX and RX
ons of an Frequency Channels)
AAU RRU (P)
Active Module High-Frequency
Passive Module
NOTICE
● Each type of optical module has its own mapping. If different types of optical
modules are used, performance risks may arise, for example, alarms, bit errors,
and interrupted links.
● To ensure that optical modules are connected and working properly, Huawei
equipment must be used with the original optical modules. As the compatibility
and quality of third-party optical modules cannot be guaranteed, using such
modules may cause connection exceptions or even damage to the main
equipment.
SFP duplex (two-fiber SFP duplex optical modules with the same
bidirectional, duplex for specifications
short) optical module
SFP BIDI (single-fiber SFP BIDI optical modules are used on both sides.
bidirectional, BIDI for ● The receive and transmit wavelengths of
short) optical module optical modules on both sides have the
mapping relationship. For example, if the
receive and transmit wavelengths of the optical
module on the BBU side are 1270TX/1330RX,
those on the RRU side are 1330TX/1270RX.
● Except for wavelengths, the specifications of
optical modules are the same.
QSFP BIDI optical module QSFP BIDI optical modules are used on both sides.
● The receive and transmit wavelengths of
optical modules on both sides have the
mapping relationship. For example, if the
receive and transmit wavelengths of the optical
module on the BBU side are 1270TX/1330RX,
those on the RRU side are 1330TX/1270RX.
● Except for wavelengths, the specifications of
optical modules are the same.
QSFP duplex optical QSFP duplex optical modules with the same
module specifications
QSFP SR4 (short distance, QSFP SR4 optical modules with the same
SR4 for short) optical specifications
module
DSFP optical module/SFP The DSFP optical module is used on the BBU side
BIDI optical module and the SFP BIDI optical module is used on the
RRU side.
● The receive and transmit wavelengths of
optical modules on both sides have the
mapping relationship. For example, if the
receive and transmit wavelengths of the optical
module on the BBU side are 1270TX/1330RX,
those on the RRU side are 1330TX/1270RX.
● Except for wavelengths, the specifications of
optical modules are the same.
NOTE
● The exterior and label on an optical module in this section are for reference only.
● Optical modules to be installed must match the rates of their corresponding ports.
● Only Huawei-certified optical modules meeting the following requirements can be used
for Huawei wireless devices:
● Requirements of devices on which optical modules are to be installed
● Laser safety requirements in the IEC 60825-1 standard
● General safety requirements in the IEC 60950-1 standard
● The supported maximum remote distance varies depending on the optical module. For
details, see section "CPRI Optical Fiber" in 3900 & 5900 Series Base Station Cables. CPRI
optical fibers are configured based on application scenarios.
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.
(1) Rate (2) Wavelength (3) Transmission distance (4) Transmission mode
A 100G SR4 optical module provides an MPO connector, as shown in the following
figure.
There is a label on each QSFP optical module, which provides information such as
the rate, wavelength, and transmission mode, as shown in the following figure.
NOTE
(1) OT terminal (M6, 16 mm2 or 0.025 in.2) (2) OT terminal (M8, 16 mm2 or 0.025 in.2)
NOTE
● 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.
NOTE
If a power device is provided by the customer, the recommended specification of the circuit
breaker on this power device is 20 A.
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.
Description
The following table describes an AAU power cable.
Table 1-10 AAU power supply solution and power cable specifications
Recommende National Remote Wire OCB
d Power Standard Distance Specifications of Quantit
Module a Power Cable y
NOTE
The AAU3920 uses one DCDU-12B with one group of power cables. The specifications of
the upper-level circuit breakers for the DCDU-12B are 2x80 A.
NOTE
● 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.
Selection Principle
The following table lists the principles for selecting CPRI optical fibers.
a: The remote distance of optical fibers is the distance between the BBU and the
first AAU or the distance between two AAUs.
Exterior
Multimode optical fiber: The multimode optical fiber has a DLC connector at
each end, as shown in the following figure.
(1) DLC connector (2) Breakout cable (3) Label on the breakout cable
NOTE
● When a multimode optical fiber connects a BBU and an AAU, the breakout cable on the
BBU side is 0.34 m (1.12 ft) and the breakout cable on the AAU side is 0.03 m (0.098 ft).
● When a multimode optical fiber connects two AAUs, the breakout cable on both sides is
0.03 m (0.098 ft).
The following figure shows the connection of a multimode optical fiber between a
BBU and an AAU.
Figure 1-22 Connection of a multimode optical fiber between a BBU and an AAU
Single-mode pigtail: It has a DLC connector at one end and an FC, LC, or SC
connector at the other end, as shown in the following figure.
(1) DLC (2) Breakout (3) Label on the (4) FC (5) LC (6) SC
connector cable breakout cable connector connector connector
NOTE
● 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.
● 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.
(1) Single-mode pigtail between a BBU and an ODF (2) Single-mode pigtail between an ODF
and an AAU
Selection Principle
The following table describes the principles for selecting CPRI optical fibers.
Signal Description
The following table describes the labels on and recommended connections for the
breakout cables of a CPRI optical fiber.
Table 1-13 Labels on and recommended connections for the breakout cables of a
CPRI optical fiber
Label Installation Position
1.3.5 Feeder
A feeder connects an RRU and an AAU and transmits signals between the base
station and the antenna system.
Exterior
Figure 1-25 shows a feeder with a DIN male connector at each end.
NOTE
Exterior
The following figure shows the exterior of an AISG multi-wire cable.
(1) DB9 waterproof male connector (2) Standard AISG female connector
Description
The following table describes an AISG multi-wire cable.
White and
blue Twisted
X1.1 X2.1 +12V
pair
Blue
Exterior
The following figure shows the exterior of an AISG extension cable.
(1) Standard AISG male connector (2) Standard AISG female connector
Description
The following table describes an AISG extension cable.
Blue
Orange
Brown