ZXSDR A8612 Product Description
ZXSDR A8612 Product Description
ZXSDR A8612 Product Description
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Due to update and improvement of ZTE products and technologies, information in this document is subjected to
change without notice.
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ZXSDR A8612 Product Description
TABLE OF CONTENTS
2
1
1.1
1.2
1.3
1.4
Overview ......................................................................................................... 4
Introduction ....................................................................................................... 4
Benefits............................................................................................................. 5
Application Scenarios ....................................................................................... 6
Functionality...................................................................................................... 6
2
2.1
2.2
2.2.1
2.2.2
2.2.3
2.2.4
2.3
2.4
2.4.1
2.4.2
2.5
2.6
2.7
2.8
2.9
Technical Specification.................................................................................. 7
Physical Specification ....................................................................................... 7
Performance Specification ................................................................................ 7
Operation Frequency Bands ............................................................................. 7
ToC Output Power ............................................................................................ 7
Capacity ............................................................................................................ 8
Static Receiving Sensitivity ............................................................................... 8
Antenna Specification ....................................................................................... 9
Power Specification ........................................................................................ 10
Power Requirements ...................................................................................... 10
Power Consumption........................................................................................ 10
Interface Specification ..................................................................................... 10
Transmission .................................................................................................. 11
Working Environment Specification ................................................................. 12
Electromagnetic Compatibility Specification .................................................... 12
Reliability Specification ................................................................................... 12
3
Glossary ........................................................................................................ 13
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ZXSDR A8612 Product Description
FIGURES
Figure 1-1 Physical Appearance ......................................................................................... 4
TABLES
Table 2-1 Physical Specification ......................................................................................... 7
Table 2-2 Operation Frequency Bands ............................................................................... 7
Table 2-3 ToC Output Power .............................................................................................. 7
Table 2-4 Capacity .............................................................................................................. 8
Table 2-5 Receiver Sensitivity ............................................................................................. 9
Table 2-6 Antenna Specification ......................................................................................... 9
Table 2-7 Power Supply .....................................................................................................10
Table 2-8 Power Consumption ...........................................................................................10
Table 2-9 Description of External Interfaces ......................................................................11
Table 2-10 CPRI Interfaces................................................................................................11
Table 2-11 Environment Specification ................................................................................12
Table 2-12 Electromagnetic Compatibility Specification .....................................................12
Table 2-13 Reliability Specification ....................................................................................12
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ZXSDR A8612 Product Description
1
Overview
1.1
Introduction
ZTE ZXSDR A8612 (hereinafter A8612) is the latest released broadband active antenna
system from ZTE. It consists of remote unit and electrical tilt antenna, supporting
GSM/UMTS/LTE multi-mode operation. A8612 is superior in many aspects in active
antenna solution, dual-band technology and dynamic output power sharing function. The
physical appearances of A8612 are shown in the following figure.
Figure 1-1
Physical Appearance
Compared with traditional solution, the RF module is integrated with antenna by active
antenna solution. In this way, the feeder loss is saved and the installation space, on the
tower, on the pole or against the wall, is greatly reduced.
The document is designed to give an overview of the characteristics of A8612 M1821 in
band 1 and band 3, its key benefits, the architecture, functionality and services, as well
as the system capabilities.
NOTE: In this document, G is short for GSM, U is short for UMTS, and L is short for FDD
LTE.
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ZXSDR A8612 Product Description
1.2
Benefits

Integration of Antenna, Simplification of RAN Architecture
A8612 is integrated with remote radio unit and electrical tilt antenna. With this design,
the feeder connections between radio unit and antenna are removed and feeder loss
is saved. The combination also saves the dwindling installation resources on the
tower, on the pole or against the wall.

Broadband, High Integration, and Less Modules
A8612 M1821 supports band 1 and band 3 simultaneously. When there are network
construction or reconstruction requirements both in 1800 MHz and 2100 MHz, one
A8612 replaces two traditional RRUs with one in 1800MHz and the other in
2100MHz. It greatly reduces module quantities, saves installation space and
corresponding operation and maintenance costs.

High output power & Compact Dimension
A8612 has 2*60 W of output power for dual-band operations. High output enables
better coverage and higher data throughput.

Multi-Mode RRU, Smooth Evolution
A8612 M1821 supports GSM, LTE modes in band 3 and UMTS, LTE modes in band
1. In different phases during the evolution process towards LTE, operators can
choose the most appropriate configurations of A8612 through software upgrade to
suit the frequency spectrum holdings.

Wide Beam Width and Narrow Beam Width for Multiple Scenarios
The antenna part of A8612 supports vertical wide beam width and narrow beam
width. A8612 with narrow beam is suitable for street coverage, and AAU with wide
beam is suitable for the coverage of tall wide buildings. A8612 can be installed
vertically or horizontally. When installed horizontally with narrow beam width, A8612
is suitable for coverage of tall narrow buildings.
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ZXSDR A8612 Product Description

Slim and Light, Suitable for Hot Spot Coverage
At 17 kg and 17 L in small slim columnar shape, A8612 requires less installation
space. It is easy to be installed on light poles in the streets in the dense urban area.
After the network coverage has been almost completed in dense area, the newly
arisen issues should be considered to improve the user experience, such as capacity
expansion and blind spot coverage in the streets between tall buildings. A8612, with
small size is the appropriate choice for operators in the scenarios mentioned above.
1.3
Application Scenarios
A8612 and Baseband Unit (BBU) comprise the distributed macro base station.
1.4
Functionality
A8612 is the remote radio unit of distributed base station. The signal is transmitted
/received through A8612 to/from base band processing unit for further processing via
standard CPRI interface.
By applying the distributed system, the feeder loss will be eliminated when the radio unit
is positioned close to the antenna. The coverage is enlarged with this solution.
A8612 supports the following functionalities:
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
Supports frequency bands of band 1 and band 3.

Supports 2T2R in one box.

Support 256 QAM modulation in LTE downlink and 64 QAM in uplink.

Supports transmit power report function for every carrier.

Supports overload protection function for power amplifier.

Supports transmit channel switching on/off function.
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ZXSDR A8612 Product Description

Supports no affection to the running of BBU and other RRUs that connected to it in
case of failure.
2
Technical Specification
2.1
Physical Specification
Table 2-1
Physical Specification
Item
Specification
Size (Height*Diameter) (mm)
785 mm * φ166 mm (17 L)
Weight (kg)
17 kg
Color
Silver gray
2.2
Performance Specification
2.2.1
Operation Frequency Bands
Table 2-2
Operation Frequency Bands
Type
A8612 M1821
Operation Radio Frequency Band
Band 1 and band 3
Uplink:1710 MHz – 1785 MHz, Downlink:1805 MHz –
1880 MHz
Uplink:1920 MHz – 1980 MHz, Downlink:2110 MHz –
2170 MHz
2.2.2
ToC Output Power
Table 2-3
ToC Output Power
Type
A8612 M1821
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TOC Output Power
Dual-band operation: 2*60 W
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ZXSDR A8612 Product Description
Type
TOC Output Power
Single band operation: 2*40 W
Note: The TOC here means the max capability of the hardware. The specific TOC output power is
limited by the license.
2.2.3
Capacity
The maximum RRU configurations in different modes are listed below and capacities of
cells in one row are supported simultaneously.
Table 2-4
Capacity
E-UTRA
Mode
RRU Capacity
Operating
Band
Band 1
UL dual-mode
4 UMTS carriers + 2  20 MHz LTE 2T2R cells
LTE single
2  20 MHz LTE 2T2R cells
mode
Band 3
LTE single
2  20 MHz LTE 2T2R cells
mode
GL dual-mode
4 GSM TRXs + 2  20 MHz LTE 2T2R cells
Band 1 +
LTE single
2  20 MHz LTE 2T2R cells@B1 + 2  20 MHz LTE
band 3
mode
2T2R cells@B3
GL dual-mode
(4 GSM TRXs + 1  20 MHz LTE 2T2R cell)@B3 + 2
 20 MHz LTE 2T2R cells@B1
GUL multi-mode
(2 GSM TRXs + 1  20 MHz LTE 2T2R cells)@B3 + (4
UMTS carriers + 1  20 MHz LTE 2T2R cells)@B1
2.2.4
Static Receiving Sensitivity
The static receiving sensitivity of A8612 is shown as following table.
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ZXSDR A8612 Product Description
Table 2-5
Receiver Sensitivity
Mode
Frequency Band
Single
Dual
Antenna
Antennas
Note
GSM
Band 3
-113.5 dBm
-115.5 dBm
-
UMTS
Band 1
-126.5 dBm
-129.2 dBm
Typical Value:
receiver sensitivity
of 12.2K AMR
-125.9 dBm
-128.6 dBm
Typical Value:
receiver sensitivity
of 3GPP 25.141’s
specification
LTE
2.3
Band 1/band 3
-106.4 dBm
-109.2 dBm
-
Antenna Specification
Table 2-6
Antenna Specification
Antenna Specification
Frequency Range (MHz)
Specification
Specification
(narrow beam)
(wide beam)
1710 – 2170
1710 – 2170
14.2@1.8 GHz
7.2@1.8 GHz
14.5@2.1 GHz
7.6@2.1 GHz
±45
±45
70±5
68±10
Gain (dBi)
Polarization(°)
Half - power Horizontal Beam
width(°)
Half - power Vertical Beam
13±1.5@1.8 GHz
width(°)
12±1.5@2.1 GHz
Electrical Tilt(°)
-3 - +12
0
Front to Back Ratio(dB)
≥25
≥21
Impedance (Ω)
50
50
Lightning protection
Direct Ground
Direct Ground
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68±18
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ZXSDR A8612 Product Description
2.4
Power Specification
2.4.1
Power Requirements
The following table describes the power supply and the fluctuation range.
Table 2-7
Power Supply
Item
Power supply
Specification
DC: -48 V (-37 V – -57 V)
AC: 220 V (154 V – 286 V)
2.4.2
Lightning protection at power
DC:20 kA
interface
AC: 20 kA
Power Consumption
Power consumption of A8612 M1821 depends on its configuration. The value is given in
the typical configuration.
Table 2-8
Power Consumption
Configuration
Typical Power
Peak Power
Consumption
Consumption
1L(1.8GHz)+4U(2.1GHz)+1L(
DC: 290 W
DC: 420 W
2.1GHz), 2*20W/L,10W/U,
AC: 300 W
AC: 430 W
total: 2*60W
2.5
Interface Specification
A8612 provides four external interfaces, including power supply, grounding cable
interface and two CPRI interfaces. The description of interface types and connectors is
listed below.
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ZXSDR A8612 Product Description
Table 2-9
Description of External Interfaces
No.
Label
Interface
Interface Type/Connector
Interface for communication
1
OPT1
between the RRU and a BBU,
LC-type optical interface
(IEC 874)
or RRU cascading interface
2
OPT2
RRU cascading interface
3
PWR
Power input interface
4
5
LMT
LC-type optical interface
(IEC 874)
DC power connector
AC power connector
Grounding cable interface
-
O&M and system test
RJ45
Additionally, A8612 provides four LED indicators on the panel, which indicate the
operating status of the RRU.
2.6
Transmission
A8612 is connected to BBU through CPRI interfaces.
The following table lists more information about CPRI interfaces.
Table 2-10
CPRI Interfaces
Item
CPRI interface
Value
2
Interface Type
SFP (LC)
Speed
10Gbps [1]
Standard
CPRI V5.0
1
The speed here refers to the max capability of the hardware. The specific speed depends on the optical module
configuration.
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ZXSDR A8612 Product Description
2.7
Working Environment Specification
Table 2-11
Environment Specification
Item
Specification
Temperature
-40°C – +55°C
Relative humidity
5% – 100%
Atmospheric pressure
70 kPa – 106 Kpa
Waterproof/Dustproof
IP65
≤5 Ω; earth resistance can be less than 10 Ω in
Ground
thunder-less area where thunderstorm days is less
than 20 per year.
2.8
Electromagnetic Compatibility Specification
Table 2-12
Electromagnetic Compatibility Specification
Item
Static Discharge Immunity
Surge Impact Immunity
Specification
Contact Discharge: ±6000 V
Air Discharge: ±8000 V
DC Power port Line to line: ±2000 V
DC Power port Line to ground: ±4000 V
2.9
Reliability Specification
Table 2-13
Reliability Specification
Item
12
Specification
MTBF
≥440,000 hours
MTTR
1 hour
Availability
≥99.999773%
Down duration
≤1.195 min/year
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ZXSDR A8612 Product Description
3
Glossary
Abbreviations
Full Characteristics
BBU
Base Band processing Unit
CPRI
Common Public Radio Interface
DL
Downlink
DFL
Duplexer & Filters
LMT
Local Maintenance Terminal
LTE
Long Term Evolution
MIMO
Multi Input Multi Output
MTBF
Mean Time Between Failures
MTTR
Mean Time To Recovery
PA
Power Amplifier
PWR
Power
DTR
Dual-channel Transceiver
RF
Radio Frequency
RRU
Remote Radio Unit
SDR
Software Defined Radio
ToC
Top of Cabinet
UL
Uplink
VSWR
Voltage Standing Wave Ratio
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