ZTE R8978S2600MH LTE Remote Radio Unit User Manual

ZTE Corporation LTE Remote Radio Unit

User manual

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ZXSDR R8978
TDD 8 Path Remote Radio Unit
User Manual
Version: V5.10
ZTE CORPORATION
No. 55, Hi-tech Road South, ShenZhen, P.R.China
Postcode: 518057
Tel: +86-755-26771900
Fax: +86-755-26770801
URL: http://support.zte.com.cn
E-mail: support@zte.com.cn
LEGAL INFORMATION
Copyright © 2014 ZTE CORPORATION.
The contents of this document are protected by copyright laws and international treaties. Any reproduction or
distribution of this document or any portion of this document, in any form by any means, without the prior written
consent of ZTE CORPORATION is prohibited.
Additionally, the contents of this document are protected by
contractual confidentiality obligations.
All company, brand and product names are trade or service marks, or registered trade or service marks, of ZTE
CORPORATION or of their respective owners.
This document is provided “as is”, and all express, implied, or statutory warranties, representations or conditions
are disclaimed, including without limitation any implied warranty of merchantability, fitness for a particular purpose,
title or non-infringement. ZTE CORPORATION and its licensors shall not be liable for damages resulting from the
use of or reliance on the information contained herein.
ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applications
covering the subject matter of this document. Except as expressly provided in any written license between ZTE
CORPORATION and its licensee, the user of this document shall not acquire any license to the subject matter
herein.
ZTE CORPORATION reserves the right to upgrade or make technical change to this product without further notice.
Users may visit the ZTE technical support website http://support.zte.com.cn to inquire for related information.
The ultimate right to interpret this product resides in ZTE CORPORATION.
Revision History
Revision Version
Revision Date
Revision Reason
R1.1
2014-10-30
Added S2600M
R1.0
2014-08-06
First edition
Serial Number: SJ-20140808143736-001
Publishing Date: 2014-10-30 (R1.1)
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Contents
About This Manual ......................................................................................... I
Chapter 1 FCC Related Statements .......................................................... 1-1
Chapter 2 Product Overview ..................................................................... 2-1
2.1 Product Positioning ............................................................................................ 2-1
2.2 Product Features................................................................................................ 2-2
2.3 External View..................................................................................................... 2-2
2.4 Product Specifications ........................................................................................ 2-3
2.4.1 ZXSDR R8978 S2300............................................................................... 2-3
2.4.2 ZXSDR R8978 S2600............................................................................... 2-4
2.4.3 ZXSDR R8978 S2600M............................................................................ 2-4
2.5 External Interfaces ............................................................................................. 2-5
2.6 Installation Modes .............................................................................................. 2-6
2.7 Typical Networking Applications .......................................................................... 2-6
Chapter 3 Product Composition ............................................................... 3-1
3.1 System Structure................................................................................................ 3-1
3.2 Composition....................................................................................................... 3-2
3.3 LED Indicators ................................................................................................... 3-3
3.4 Physical Interfaces and Cables ........................................................................... 3-5
3.4.1 Protective Grounding Cable ...................................................................... 3-5
3.4.2 DC Power Input Cable .............................................................................. 3-6
3.4.3 LMT/TST Interface Cable.......................................................................... 3-9
3.4.4 Optical Fiber .......................................................................................... 3-10
3.4.5 Antenna Feeder Interface Cable...............................................................3-11
3.4.6 CAL/AISG Interface Cable ...................................................................... 3-13
3.4.7 EAM/RGPS Interface Cable .................................................................... 3-14
3.5 External Cable Connection ............................................................................... 3-14
3.6 Software Composition....................................................................................... 3-15
Chapter 4 Operation and Maintenance..................................................... 4-1
4.1 Technical Support............................................................................................... 4-1
4.2 Fault Location .................................................................................................... 4-2
4.3 Equipment Maintenance ..................................................................................... 4-3
4.4 Power On .......................................................................................................... 4-4
4.5 Power Off .......................................................................................................... 4-5
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4.6 Parts Replacement............................................................................................. 4-6
4.6.1 Replacing the ZXSDR R8978.................................................................... 4-6
4.6.2 Replacing the Optical Module.................................................................... 4-7
4.6.3 Replacing the RF Cable............................................................................ 4-8
Chapter 5 Accessory Devices ................................................................... 5-1
5.1 Junction Box ...................................................................................................... 5-1
5.2 AC Power Lightening Protection Box ................................................................... 5-3
5.3 Replacing the AC Power Lighting Protection Box.................................................. 5-6
Chapter 6 Technical Specifications .......................................................... 6-1
6.1 Physical Specifications ....................................................................................... 6-1
6.2 Performance Indexes ......................................................................................... 6-1
6.3 Power Consumption ........................................................................................... 6-2
6.4 Reliability Indexes .............................................................................................. 6-2
6.5 Grounding Requirement...................................................................................... 6-3
6.6 Lightening and Surge Protection ......................................................................... 6-3
Chapter 7 Environment Requirements ..................................................... 7-1
7.1 Power Supply Requirements ............................................................................... 7-1
7.2 Operating Environment ....................................................................................... 7-1
7.3 Storage Environment.......................................................................................... 7-2
Figures............................................................................................................. I
Tables ............................................................................................................ III
Glossary .........................................................................................................V
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About This Manual
Purpose
This manual describes the software and hardware structures, interfaces and cables,
functions, features, technical specifications, installation modes, networking, and
maintenance methods of the ZXSDR R8978.
Intended Audience
This manual is intended for:
Base station installation engineers
Base station commissioning engineers
Base station maintenance engineers
What Is in This Manual
This manual contains the following chapters.
Chapter 1, FCC Related
Describes the statements related to FCC rule.
Statements
Chapter 2, Product Overview
Describes the external view, interfaces, functions, features, and
typical network applications of the ZXSDR R8978.
Chapter 3, Product Composition
Describes the system structure, hardware composition, and
software composition of the ZXSDR R8978.
Chapter 4, Operation and
Provides the technical support contact information, power-on and
Maintenance
power-off flow, and component replacement methods.
Chapter 5, Accessory Devices
Describes the accessory devices, including junction box, and AC
power lightening protection box, and the replacement methods.
Chapter 6, Technical
Provides the technical specifications of the ZXSDR R8978.
Specifications
Chapter 7, Environment
Describes the environment requirements of the ZXSDR R8978.
Requirements
Conventions
This manual uses the following conventions.
Danger: indicates an imminently hazardous situation. Failure to comply can result in
death or serious injury, equipment damage, or site breakdown.
Warning: indicates a potentially hazardous situation. Failure to comply can result in
serious injury, equipment damage, or interruption of major services.
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Caution: indicates a potentially hazardous situation. Failure to comply can result in
moderate injury, equipment damage, or interruption of minor services.
Note: provides additional information about a topic.
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Chapter 1
FCC Related Statements
Warning!
Changes or modifications to this unit not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the equipment is operated in
a commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications. Operation of this equipment
in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
Operation of this equipment in a residential area is likely to cause harmful interference in
which case the user will be required to correct the interference at his own expense.
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with minimum distance
10.2 m between the radiator & your body.
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Chapter 2
Product Overview
Table of Contents
Product Positioning ....................................................................................................2-1
Product Features........................................................................................................2-2
External View .............................................................................................................2-2
Product Specifications ................................................................................................2-3
External Interfaces .....................................................................................................2-5
Installation Modes ......................................................................................................2-6
Typical Networking Applications .................................................................................2-6
2.1 Product Positioning
The ZXSDR R8978 is an eight-path TD-LTE RRU with high power. It operates with a BBU
to cover new outdoor sites.
The ZXSDR R8978 works with a BBU to compose a complete eNodeB and implement the
functions such as radio transmission in the coverage area and radio channel control.
Figure 2-1 illustrates the position of the ZXSDR R8978 in a LTE network.
Figure 2-1 Position of the RRU in a Network
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2.2 Product Features
Unified Platform
The ZXSDR R8978 is developed based on the unified SDR platform, which supports
smooth evolution to new technologies in the future, and protects the operators' investment
in maximum.
Energy conservation and environmental protection
Designed with high-efficiency power amplifier technologies: Crest Factor Reduction
(CFR), Digital Pre-Distortion (DPD) and Doherty to reduce equipment's power
consumption.
Uses passive heat dissipation without electrical noise, which can save 35% power
consumption compared with the traditional air conditioner to effectively reduce the
operators' power consumption cost.
Supports the energy-saving technologies such as slot-based power saving and
voltage regulation power saving.
Multi-Carrier, MIMO, BF, and High Performance
Supports multiple frequency bands such as 2.3 GHz/2.6 GHz to satisfy the
requirements of various operators.
Supports flexible configuration of up to TD-LTE 4x20 MHz multi-carriers to fully and
flexibly utilize the operators' spectrum.
High Output Power
Up to 160 W (8x20 W) output power is provided to satisfy the power requirements for high
capacity and large coverage.
10 Gbps Optical Interface
Two 10 Gbps CPRI optical interfaces are provided to satisfy the TD-LTE CPRI flow
requirement. CPRI optical interface multi-mode transmission is supported (the 6 Gbps
optical interface rate is also supported).
2.3 External View
Figure 2-2 shows the external view of the ZXSDR R8978.
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Chapter 2 Product Overview
Figure 2-2 External View
2.4 Product Specifications
The ZXSDR R8978 is an eight-channel RRU that an be used for networking TD-LTE macro
cells.
In this manual, all the descriptions for the ZXSDR R8978 are applicable to the following
specifications unless specially stated:
ZXSDR R8978 S2300
ZXSDR R8978 S2600
ZXSDR R8978 S2600M
2.4.1 ZXSDR R8978 S2300
For the key features of the ZXSDR R8978 S2300, refer to Table 2-1.
Table 2-1 Key Features of the ZXSDR R8978 S2300
Item
Description
Radio access mode
TD-LTE
Frequency band
2300 MHz~2400 MHz
Antenna
Supports 4×4 MIMO dual TRX channels.
Maximum number of carriers
TD-LTE: 4×20 MHz
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Item
Description
Signal bandwidth
80 MHz
Maximum power output in each channel
20 W
Power input
DC: -48 V DC
AC: 100 V AC/110 V AC/220 V AC
2.4.2 ZXSDR R8978 S2600
For the key features of the ZXSDR R8978 S2600, refer to Table 2-2.
Table 2-2 Key Features of the ZXSDR R8978 S2600
Item
Description
Radio access mode
TD-LTE
Frequency band
2575 MHz–2635MHz
Antenna
Supports 4×4 MIMO dual TRX channels.
Maximum number of carriers
TD-LTE: 3×20 MHz
Signal bandwidth
60 MHz
Maximum power output in each channel
25 W
Power input
DC: -48 V DC
AC: 100 V AC/110 V AC/220 V AC
2.4.3 ZXSDR R8978 S2600M
For the key features of the ZXSDR R8978 S2600M, refer to Table 2-3.
Table 2-3 Key Features of the ZXSDR R8978 S2600M
Item
Description
Radio access mode
TD-LTE
Frequency band
2590 MHz~2690 MHz
Antenna
Smart Antenna
RET
8–path transceiving channels
Maximum number of carriers
TD-LTE: 4x20 MHz 2x20 MHz
Signal bandwidth
100 MHz
Maximum power output in each channel
20 W
Power input
-48 VDC
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2.5 External Interfaces
Figure 2-3 illustrates the external interfaces of the ZXSDR R8978.
Figure 2-3 External Interfaces
For a description of the external interfaces, refer to Table 2-4.
Table 2-4 External Interface Description
External Device
Description
External Interface
BBU
BBU performs the functions such as GPS
Logical interface: Ir interface
synchronization, main control, and baseband
Physical interface: optical
processing.
fiber interface
UE accomplishes the Uu interface functions of
Logical interface: Uu interface
transmitting voice and data services.
Physical interface: none
External environment monitoring device
Logical interface: not
UE
User device
standardized
Physical interface: dry contact
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External Device
Description
External Interface
RRU LMT
Operates and maintains the RRU at the local
Logical interface: not
end
standardized
Physical interface: Ethernet
interface
Cascade RRU
Upstream RRU
Logical interface: Ir interface
Physical interface: optical
fiber interface
•
External interfaces exclude the power and antenna interface of the RRU.
Note:
The LMT at the BBU side can operate and maintain multiple RRUs under the BBU. ZTE
NetNumen™ EMS provides unified operation and maintenance on multiple sites.
2.6 Installation Modes
The ZXSDR R8978 supports three installation modes:
A single RRU mounted on a pole
Two RRUs mounted on a pole
Mounted on a wall
Mounted on slot steel
Mounted on angle steel
2.7 Typical Networking Applications
The ZXSDR R8978 supports the following networking solutions:
l Chain networking
Chain networking applies to strip-shaped areas with sparse population, where optical
fibers can be laid conveniently. Figure 2-4 shows a chain networking solution.
Figure 2-4 Chain Networking
Star networking
In a star networking solution, a BBU is connected to each RRU and the RRU is
the terminal equipment. This networking type is simple and easy for maintenance
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Chapter 2 Product Overview
and engineering. Because the signal passes through fewer intermediate links along
the transmission path, the link reliability is much higher. Figure 2-5 shows a star
networking solution.
Figure 2-5 Star Networking
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Chapter 3
Product Composition
Table of Contents
System Structure........................................................................................................3-1
Composition ...............................................................................................................3-2
LED Indicators............................................................................................................3-3
Physical Interfaces and Cables ..................................................................................3-5
External Cable Connection .......................................................................................3-14
Software Composition ..............................................................................................3-15
3.1 System Structure
Figure 3-1 shows the system structure of the ZXSDR R8978.
Figure 3-1 System Structure
Table 3-1 describes the subsystems of the ZXSDR R8978.
Table 3-1 Subsystem Description
Name
Type
Function
RRU software
Software
Provides the system operating system and OM functions
subsystem
subsystem
Transceiver
Hardware
subsystem
8T8R filter unit
Hardware
Power interface
Optical interface
Control functions
Clock functions
DIF
TRX
Eight-channel filter
subsystem
Structure subsystem
Structure
Provides equipment protection, heat dissipation, and
subsystem
installation, and module structure, heat dissipation, and
installation.
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3.2 Composition
Figure 3-2 shows the composition of the ZXSDR R8978.
Figure 3-2 Product Composition
1. Radiating pin
2. Handle
3. LED indicators
4. Operation and maintenance
cavity
5. Antenna interface
6. CAL/AISG interface
7. Grounding bolt
8. Breathable valve
9. EAM/RGPS interface
The operation and maintenance cavity contains one DC power interface, two optical
interfaces (OPT1 and OPT2), one RRU LMT/test interface (LAM/TST).
The equipment has six LED indicators.
A handle is installed on the upper shell to facilitate installation and transportation.
At the bottom of the equipment, there are eight antenna interfaces (ANT1–ANT8), one
hermetic seal (breathable valve), one antenna calibration interface (CAL/AISG), and
one dry contract user device interface (EAM/RGPS).
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Note:
The LMT/TST interface is used for ZTE maintenance personnel to perform commissioning
and maintenance.
3.3 LED Indicators
An indicator indicates the operating status of a device. Figure 3-3 shows the positions of
the indicators.
Figure 3-3 LED Indicators
Table 3-2 describes the LED indicators.
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Table 3-2 Indicator Descriptions
Name
Indication
Color
Description
RUN
Operation
Green
OFF: The system is not powered.
indicator
ON: The system is powered. The software system is not
running.
Flashing slowly (ON for 1 s and OFF for 1 s): The system is
powered. The software system is being started.
Flashing normally (ON for 0.3 s and OFF for 0.3 s): The
system is powered. The software system has been started.
The communication between the RRU and BBU is normal.
Flashing fast (ON for 70 ms and OFF for 70 ms): The system
is powered. The software system has been started. The link
between the ZXSDR R8978 and BBU is not established.
ALM
Alarm indicator
Red
OFF: There is no alarm.
ON: There is an alarm.
OPT1
Indicator of
Green
optical interface
OFF: The optical interface does not receive optical signals.
ON: The optical interface has received optical signals and
the link is not synchronized.
Flashing (ON for 0.3 s and OFF for 0.3 s): The optical interface
has received optical signals and the link is synchronized.
OPT2
Indicator of
Green
optical interface
OFF: The optical interface does not receive optical signals.
ON: The optical interface has received optical signals and
the link is not synchronized.
Flashing (ON for 0.3 s and OFF for 0.3 s): The optical interface
has received optical signals and the link is synchronized.
VSWR
Indicator of
Red
the VSWR at
links are normal.
the antenna
ON: There is a VSWR alarm at the antenna interface of the
interface
ACT
Radio link
OFF: VSWRs at all antenna interfaces of the transmitting
transmitting link.
Green
status indicator
Solid ON: Indicates that the radio links are successfully
established, and cells are established.
OFF: Indicates that no radio links are established or
establishment failed, and no cell exists.
•
The ALM indicator does not indicate alarms of the optical interfaces (OPT1 and OPT2) and VSWR
alarms at the antenna interfaces.
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3.4 Physical Interfaces and Cables
3.4.1 Protective Grounding Cable
Function
The protective grounding point is located at the bottom of the handle.
The protective grounding cable provides protective ground for the system. There are a total
of two bolts that provide a grounding connection to the ZXSDR R8978. The grounding bolt
can be connected with a dual hole OT terminal that complies with the GR1089 specification.
The OT terminal can be connected to the 16 mm2 multi-cores yellow-green copper wire.
External View
The protective grounding cable is a 16 mm2 yellow/green cable. Figure 3-4 shows the
external view.
Figure 3-4 Protective Grounding Cable
Connection
End A is connected to the grounding interface of the ZXSDR R8978. End B is connected
to the external grounding bar.
Note:
The connection area of the grounding bolt and OT terminal shall not be less than the area
of the OT terminal, and the connection resistance must be less than 50 mΩ.
Figure 3-5 illustrates the cable connection.
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Figure 3-5 Connection of the Protective Grounding Cable
Note:
The two bolts on the left are used for installing the protective grounding cable. The bolt on
the right is only used for fixing and does not connect to any cable.
3.4.2 DC Power Input Cable
Function
The DC power input interface is located in the operation and maintenance cavity of the
ZXSDR R8978.
The DC power input cable leads the external DC power into the operation and maintenance
cavity of the ZXSDR R8978. It connects to the DC power through a dual-core DC bracket
and a dual-core DC connector, to provide -48 V DC power input for the RRU.
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Caution!
The 10 mm2 DC power cable cannot be directly connected to the ZXSDR R8978, and
needs to be converted to a 4 mm2 DC power cable through a junction box before connecting
to the ZXSDR R8978.
The ZXSDR R8978 does not have an AC power interface. The AC power should be
converted into DC power through the outdoor AC power lightening protection box and
then connected to the ZXSDR R8978.
External View
The DC power cable is a blue-black cable. Figure 3-6 shows the external view.
Figure 3-6 DC Power Input Cable
1. Copper wire
2. Shielding layer
3. -48 V core
4. -48 V GND core
Signal Description
Signal Name
Signal Meaning
Wire Color
-48 V
-48 V power
Blue
-48 V GND
-48 V ground
Black
Connection
If...
Then...
Use the DC power supply
The junction box is not required if the indoor power lightening protection
without a junction box
box is near to the ZXSDR R8978 and voltage drop can be ignored.
The indoor DC power distribution unit (with a power switch) connects to
the lighting protection box of the indoor DC power supply.
Connect the ZXSDR R8978 to the indoor DC power lighting protection
box (there are a total of three outputs in the indoor DC power lighting
protection box, each of which has an air switch and can be connected
to an RRU).
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If...
Then...
Use the DC power supply
If voltage drop occurs due to the distance between the ZXSDR R8978
with a junction box
and the indoor DC power lighting protection box, a power cable with a
larger diameter size is needed to reduce the voltage drop caused by long
distance transmission. A junction box is needed to convert the cables to
a different size.
The indoor DC power distribution unit (with a power switch) connects to
the lighting protection box of the indoor DC power supply.
Connect the junction box to the indoor DC power lighting protection
box (there are a total of three outputs in the indoor DC power lighting
protection box, each of which has an air switch and can be connected
to an RRU).
After the DC power cable is converted by the junction box, it can be
connected to the ZXSDR R8978.
Use the AC power supply
The junction box is not required because the AC power supply is low with
without a junction box
a large voltage and voltage drop can be ignored.
Connect the indoor AC power distribution cabinet to the outdoor AC
power lightening protection box (there are a total of three outputs in the
indoor AC power distribution cabinet, each of which has a power switch
and can be connected to an RRU).
Connect the outdoor AC power lightening protection box to the ZXSDR
R8978.
Figure 3-7 illustrates the cable connection.
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Figure 3-7 Connection of DC Power Input Cable
Note:
The two cores of the DC power cable End A should be wrapped with a tube terminal.
After the tube terminal is crimped and inserted to the dual core DC connector, the DC
power cable can be inserted to the dual core DC socket through the DC connector.
The End B of the DC power cable is bare and connects to the external power supply.
The two ends of the power cable must be made at the site.
3.4.3 LMT/TST Interface Cable
Function
The LMT/TST interface is located in the operation and maintenance cavity. It uses an RJ45
socket.
The LMT interface is used for the interaction between the LMT and ZXSDR R8978 through
an Ethernet port using TCP/IP. TELNET command lines are supported.
Connection
End A is connected to the LMT interface in the operation and maintenance cavity. End B
is connected to the LMT or PC.
Figure 3-8 illustrates the cable connection.
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Figure 3-8 Connection of the LMT/TST Interface Cable
Note:
The LMT/TST interface is used for ZTE maintenance personnel to perform commissioning
and maintenance.
3.4.4 Optical Fiber
Function
The ZXSDR R8978 has two optical interfaces, OPT1 and OPT2. They are located in the
operation and maintenance cavity. LC-type optical fiber connectors are supported.
In the ZXSDR R8978 system, the optical interfaces have the following functions:
OPT1 and OPT2 can connect the RRU to an upstream BBU, to carry the IQ data and
communication signaling between the RRU and BBU.
If the RRU serves as the upstream RRU. one optical interface can be used to cascade
a downstream RRU.
If the RRU serves as the downstream RRU, one optical interface can be used to
cascade an upstream RRU.
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Chapter 3 Product Composition
External View
The optical fiber uses LC-type connectors. Figure 3-9 shows the external view.
Figure 3-9 Optical Fiber
Connection
End A is connected to the optical ports (OPT1 and OPT2) of the ZXSDR R8978. End B is
connected to the BBU/dowstream RRU/upstream RRU.
Figure 3-10 illustrates the cable connection.
Figure 3-10 Connection of the Optical Fiber
3.4.5 Antenna Feeder Interface Cable
Function
The antenna feeder interface is located on the external filter at the equipment bottom. It
uses N-type female connectors.
The antenna feeder interface cable connects the antenna interface of the ZXSDR R8978
to the antenna. It is used for the signal receiving and transmission at the antenna.
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External View
The antenna feeder interface cable is a 50 Ω cable with a diameter of 1/2 in (1 in=25.4
mm). Both ends are N-type male connectors. Figure 3-11 shows the external view.
Figure 3-11 Antenna Feeder Interface Cable
Connection
End A is connected to the ANT interface of the ZXSDR R8978. End B is connected to the
corresponding interface of the main antenna feeder.
The antenna feeder interface cable is a 1/2 inch jumper. Figure 3-12 illustrates the cable
connection.
Figure 3-12 Connection of the Antenna Feeder Interface Cable
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3.4.6 CAL/AISG Interface Cable
Function
The CAL interface is located at the external filter at the bottom of the ZXSDR R8978. It
uses a type-N female connector.
The CAL interface cable used by the ZXSDR R8978 uses a jumper with a diameter of 1/2
inch. Both ends are N-type male connectors. The CAL interface supports antenna channel
calibration and AISG for RET antennas.
The CAL interface integrates AISG and antenna calibration. If an RET antenna is used, the
CAL interface of the ZXSDR R8978 is connected to the integrated interface of the antenna.
External View
The CAL interface cable is an RF cable with a diameter of 1/2 in (1 in=25.4 mm). Both
ends are N-type male connectors. Figure 3-13 shows the external view.
Figure 3-13 CAL Interface Cable
Connection
End A is connected to the CAL interface of the ZXSDR R8978. End B is connected to the
CAL interface of the antenna.
Figure 3-14 illustrates the cable connection.
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Figure 3-14 Connection of the CAL Interface Cable
3.4.7 EAM/RGPS Interface Cable
Function
The dry contact (EAM) interface is located at the external filter at the bottom of the ZXSDR
R8978. It uses an eight-core round connector. It supports the RGPS functions and one
dry contract input to transparently transmit the external device status.
The RGPS receiver is located at the GPS receiving antenna. Installed near the antenna,
the satellite card transmits the output digital signal to the clock main control card through
a differential line. Because digital signal transmission is not affected by RF signal
attenuation, the remote distance is long and good reliability and maintainability is ensured.
Connection
End A is connected to the EAM interface of the ZXSDR R8978. End B is connected to the
dry contact output/RGPS interface of the external device.
3.5 External Cable Connection
Figure 3-15 illustrates the external cable connection.
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Figure 3-15 External Cable Connection
3.6 Software Composition
The ZXSDR R8978 software system is composed of:
RF management
Includes RF main control and RF channel management.
OAM adaptation software
Provides an adaptation interface for entire operation and maintenance.
Provides the following OAM functions: configuration management, version
management, performance statistics, test management, security management,
diagnostic test, system control, and communication processing.
OSS
Uses an SDR platform architecture.
Provides the functions such as scheduling management, memory management, and
timer management.
BSP
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Uses a unified architecture design and provides a unified interface for the upper layer.
OS
Uses the Linux system independently developed by ZTE.
Figure 3-16 shows the software composition of the ZXSDR R8978.
Figure 3-16 Software Composition
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Chapter 4
Operation and Maintenance
Table of Contents
Technical Support.......................................................................................................4-1
Fault Location.............................................................................................................4-2
Equipment Maintenance.............................................................................................4-3
Power On ...................................................................................................................4-4
Power Off ...................................................................................................................4-5
Parts Replacement.....................................................................................................4-6
4.1 Technical Support
ZTE technical support contract information is pasted in a conspicuous position in the
equipment room, see Figure 4-1.
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Figure 4-1 ZTE Technical Support Contact Information
4.2 Fault Location
For the fault location methods in routine maintenance, refer to Table 4-1.
Table 4-1 Fault Location Methods
Maintenance Method
Description
Checking Alarms and
This is the most common method for troubleshooting. By checking the
Operation Logs
alarm management tab of the operation and maintenance system, you
can check the alarms and operation logs.
Check and analysis of the current, historical alarms and common
notifications through the alarm management tab, to find the abnormal
status, locating and handling faults.
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Maintenance Method
Description
By checking the operation logs in user management, you can
trace system parameter modification, locate relevant terminals and
operators, and discover the faults caused by manual operations.
Performance Analysis
By checking the performance management tab, you can create different
performance test tasks, generate the relevant performance reports to
determine the system performance indexes. By analyzing this information,
you can find the load distribution in the network and adjust the relevant
network parameters, to improve the integrated network performance in
time.
Instrument and Meter
Auxiliary instruments, such as test UE, signaling analyzers, and bit
Analysis
error analyzers, can be used for fault analysis, fault location and
troubleshooting.
Replacement
You can replace a faulty part with a spare part or a peer part that operates
properly in the system to locate a fault. For fault location by using
the replacement method, you need to perform relevant operations in
accordance with the replacement procedures described in this manual.
Self-test
The system performs a self-test when it is powered on again. During the
self-test, the indicators flash in accordance with relevant rules. You can
locate faults by checking the indicators.
Integrated Method
In actual operation, all the methods can be used for troubleshooting. You
can handle different faults based on the fault location methods and past
experience.
4.3 Equipment Maintenance
For a description of the ZXSDR R8978 equipment maintenance, refer to Table 4-2.
Table 4-2 Equipment Maintenance
Item
Description
Frequency
Check equipment surface
Check whether the equipment is damaged or cracked
Quarterly
Check the equipment
Check whether there is deposited dust on the equipment
Quarterly
clean condition
surface. If yes, you need to clean the dust.
Check labels
Check whether the equipment and cable labels are clean
Quarterly
and clear.
Check indicators
In accordance with the description for the indicators, check
Monthly
the indicator status. If any fault occurs, handle it as soon
as possible.
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4.4 Power On
Caution!
Before power on, you need to check the equipment and cable installation in detail,
to ensure that all the installation results comply with the engineering installation
specifications.
Figure 4-2 shows the power-on flow.
Figure 4-2 Power-on Flow
For a description of the ZXSDR R8978 power-on flow, refer to Table 4-3.
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Table 4-3 Power-on Steps
Item
Power-on Steps
DC power
1. Turn on the switch of the power distribution unit, and check whether the equipment
supply
output voltage is in the normal range.
2. Turn on the switch of the indoor DC power lighting protection box of the ZXSDR
R8978. Power the ZXSDR R8978 on, and test whether the RRU input voltage
is in the normal range.
3. Check whether the BBU indicator or the RRU indicator is normal.
AC power
1. Turn on the switch of the AC power distribution unit of the ZXSDR R8978, and
supply
check whether the equipment output voltage is in the normal range.
2. Check whether the BBU indicator or the RRU indicator is normal.
Note:
To avoid current surge, you need to power on the RRUs in the cell sequence every 30
s. At the same time, you can check whether the cables of a cell are connected properly
through the BBU indicator.
4.5 Power Off
Power-off of the ZXSDR R8978 includes:
Emergency power-off: occurs when the equipment room is on fire, flooding or in smog.
Common power-off: occurs in some application scenarios, for example, equipment
move or expected local power outage.
For a description of the ZXSDR R8978 power-off flow, refer to Table 4-4.
Table 4-4 Power-off Steps
Item
Emergency Power-off
Common Power-off
DC power supply
Turn off the air switch
1. Turn off the air switch of the DC power
of the indoor DC power
lighting protection box of the ZXSDR
distribution unit.
R8978.
2. Turn off the air switch of the indoor DC
power distribution unit.
AC power supply
Turn off the air switch of the indoor AC power distribution unit.
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4.6 Parts Replacement
4.6.1 Replacing the ZXSDR R8978
Locate the ZXSDR R8978 faults through observation and analysis, and determine whether
to replace the ZXSDR R8978. Replacing the ZXSDR R8978 will interrupt all the services
carried by the ZXSDR R8978.
Prerequisite
Verify the hardware type of the faulty ZXSDR R8978. Prepare a proper ZXSDR
R8978. The specifications of the proper ZXSDR R8978 must be consistent with the
faulty one.
Prepare the following tools.
Tool
Function
Wrench
Installs or uninstalls the RF cables
M5 cross screw driver
Installs or uninstalls the ZXSDR R8978 maintenance cavity, or
fastens the screws and protection grounding cables.
Waterproof tape
Provides waterproof protection for the RF cable connectors
Sticker
Marks the connection of the cables to be replaced (after the
replacement, all the cables must be reconnected to the place
where they were)
Moisture proof antistatic
Stores the faulty ZXSDR R8978
bag and carton
Steps
1. Power off the ZXSDR R8978.
2. Open the cover of the ZXSDR R8978 maintenance cavity by using the M5 screw driver.
3. Paste a label at each end of every optical fiber.
4. Remove the fix screws from the cable crimper by using the M5 screwdriver.
5. Pull up the insulating part of the dual core DC connector against the direction of the
arrow marked on the shell. Pull out the connector and uninstall the power cables.
6. Press the blue crimper of the fiber, and pull the fiber out of the connector.
7. Use the M5 cross screwdriver to remove the grounding bolt and remove the protective
grounding cable.
8. Remove all the waterproof tapes from the jumpers of the antenna port. Uninstall
the jumper from the ZXSDR R8978 antenna port by using the wrench with insulation
protective treatment.
9. Uninstall the AISG/EAM cable.
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10. Tighten the jacking screw clockwise and jack the ZXSDR R8978 chassis. Then, loosen
the plate-pressing bolt anti-clockwise.
11. Pull up the ZXSDR R8978 from the pole or wall-mounting bracket, and remove the
ZXSDR R8978.
12. Put the faulty equipment into the moisture proof antistatic bag. Label the equipment
model, sector ID and fault information on the bag. Put the faulty equipment into the
carton and label the same information as the antisatic bag.
13. Reinstall all equipment parts and tighten every screw.
14. Connect all cables with waterproof and insulation protective treatment.
15. Power on the ZXSDR R8978.
16. The ZXSDR R8978 perform the self-test process after it is powered on. During the
self-test, you need to observe the indicator status and perform operations accordingly.
If...
Then...
The indicator is normal, which means
The self-test and replacement are successful.
that services are restored.
The indicator is abnormal, which means
Troubleshoot the fault and handle the relevant alarms, or
that services are not restored.
contact ZTE technical support.
– End of Steps –
4.6.2 Replacing the Optical Module
The optical module provides the optics and electrical conversion. Replacing the optical
module will interrupt all the services carried on the optical module.
Caution!
The optical module supports hot plugging. Before hot plugging, you must wear the
antistatic wrist strap.
Do not look directly at the optical module inside when replacing the optical fiber,
avoiding damage to your eyes.
Prerequisite
Prepare a proper optical module.
Take a record of the connection position at both ends of the faulty optical modules and
fibers. Mark the positions between the optical module and fibers.
Tool
Function
Antistatic wrist strap
Provides antistatic protection
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Tool
Function
M5 cross screw driver
Installs or uninstalls the ZXSDR R8978 maintenance cavity
Sticker
Marks the connection of the cables to be replaced (after the
replacement, all the cables must be reconnected to the place
where they were)
Moisture-proof antistatic bag
Stores the faulty optical module
and carton
Steps
1. Open the cover of the maintenance cavity by using the M5 screw driver.
2. Paste a label at each end of every optical fiber.
3. Press the blue clamp of the fiber, and pull the fiber connector out of the optical module
to be replaced.
4. Pull the optical module out of the slot.
5. Install the proper optical module into the slot.
6. Remove the dustproof cap, and connect the fiber connector to the new optical module.
7. Check whether the optical module is operating properly in accordance with the
indicator status.
8. Tighten the fiber clamp and close the maintenance cavity.
– End of Steps –
4.6.3 Replacing the RF Cable
The RF cable transmits or receives RF signals. Locate the faults through observation and
analysis, and ensure that whether to replace the RF cable. Replacing the RF cable will
interrupt all the services carried by the ZXSDR R8978.
Prerequisite
Prepare a proper RF cable to be replaced.
Each site has a set of RF cables corresponding to the site type.
à
For BTS expansion or modification, you can select a set of RF cables
corresponding to the site type.
à
For replacement of a single RF cable, you can select a proper RF cable from the
RF cable set.
Check whether the core connector of the RF cable is proper.
Prepare the following tools.
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Tool
Function
Wrench
Installs or uninstalls the RF cable
Waterproof tape
Provides waterproof protection for the RF cable connector
Sticker
Marks the connection of the cable to be replaced (after the
replacement, the cable must be reconnected to the place where
it was)
Moisture-proof antistatic bag
Stores the faulty RF cable
and carton
Steps
1. Power off the ZXSDR R8978.
2. Remove the waterproof tape of the RF cable.
3. Loosen the connectors of the RF cables by using the wrench.
4. Put the faulty cable into the moisture proof antistatic bag. Label the cable model, sector
ID and fault information on the bag. Put the faulty cable into the carton and label the
same information as the antisatic bag.
5. Connect the proper RF cable in accordance with the previous connection, see Figure
4-3.
Figure 4-3 Connecting the RF cable
Caution!
During the uninstallation process, take off the connector carefully. Try not to damage
the connector.
6. Wrap the RF cable connectors with waterproof tape, see Figure 4-4.
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Figure 4-4 Waterproof Treatment
7. Power on the ZXSDR R8978.
8. The ZXSDR R8978 performs the self-test process after it is powered on. During the
self-test, you need to observe the indicator status and perform operations accordingly.
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If...
Then...
The indicator is normal, which
The self-test and replacement are successful.
means that services are restored.
The indicator is abnormal, which
Troubleshoot the fault and handle the relevant alarms, or
means that services are not
contact ZTE technical support.
restored.
– End of Steps –
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Chapter 5
Accessory Devices
Table of Contents
Junction Box ..............................................................................................................5-1
AC Power Lightening Protection Box ..........................................................................5-3
Replacing the AC Power Lighting Protection Box .......................................................5-6
5.1 Junction Box
Function
When the DC power supply is far from the ZXSDR R8978, to avoid voltage drop, a 2×10
mm2 DC power cable needs to be used. To connect to the 2×4 mm2 DC power cable used
by the ZXSDR R8978, the 2×10 mm2 DC power cable should be converted through the
junction box.
External View
Figure 5-1 shows the external view of the junction box.
Figure 5-1 Junction Box
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Specifications
Table 5-1 shows the specifications of the junction box.
Table 5-1 Junction Box Specifications
Name
Specification
Height × Width × Depth
233 mm × 119 mm × 55 mm (excluding the handle and waterproof cap)
Installation Mode
For single RRU pole-mounted installation or wall-mounted installation, the junction box can
be installed at a side (recommended) or the front of the RRU through an adaptor. For two
RUUl pole-mounted installation, the junction box needs to be installed on the pole.
Figure 5-2 shows how to install the junction box at a side for example.
Figure 5-2 Junction Box Installation
Interfaces and Cable Connection
Figure 5-3 shows the interfaces and cable connection of the junction box.
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Figure 5-3 Interfaces and Cable Connection
Interface Name
Cable Description
INPUT
2×10 mm2 DC power cable
OUTPUT
2×4 mm2 DC power cable
5.2 AC Power Lightening Protection Box
Function
The outdoor AC power lightening protection box is PPC33 A009. It protects the AC current
from lightening and coverts AC into the DC that is applicable for the ZXSDR R8978.
External View
Figure 5-4 shows the external view of the AC power lightening protection box.
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Figure 5-4 External View
Specifications
Table 5-2 shows the specifications of the AC power lightening protection box.
Table 5-2 Specifications of the AC Power Lightening Protection Box
Item
Specification
Height × Width × Depth
300 mm × 250 mm × 118 mm (excluding the
handle and waterproof cap
Installation mode
Pole-mounted installation, all-mounted installation
Lightening protection index
20 kA
Installation Modes
The AC power lightening protection box can be mounted on a pole or wall, see Figure 5-5.
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Figure 5-5 Installation Modes
Interfaces and Cable Connection
Open the AC power lightening protection box and connect the internal and external cables,
see Figure 5-6.
Figure 5-6 Interfaces and Cable Connection
Name
Description
-220 AC_L
220 V AC live line
-220 AC_N
220 V AV neutral line
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Name
Description
-48 V DC
-48 V DC neutral line
-48 V DC RTN
-48 V DC earth line
PE
Protective grounding cable
5.3 Replacing the AC Power Lighting Protection Box
If the AC power lighting protection box has an abnormal output but the input is normal, it
has some faults and should be replaced immediately.
Prerequisite
Verify the hardware type of the faulty AC power lighting protection box. Prepare a
proper AC power lighting protection box. The specifications of the proper AC power
lighting protection box must be consistent with the faulty one.
Prepare the following tools.
Tool
Function
Wrench
Installs or uninstalls the outdoor AC power lighting protection
box from a pole
M4 Inner-hexagon wrench
Installs or uninstalls the pole-mounted installation assemblies,
or fastens the anti-theft screws
M6 cross screwdriver
Installs or uninstalls the mounting plate and cables of the
outdoor AC power lighting protection box
Waterproof tape
Provides waterproof protection for the cable connectors
Sticker
Marks the connection of the cables to be replaced (after the
replacement, all the cables must be reconnected to the place
where they were)
Moisture proof antistatic bag
Stores the faulty AC power lighting protection box
and carton
Steps
1. Power off the ZXSDR R8978.
2. Remove the waterproof tape from the cables. Uninstall the cables of the AC power
lighting protection box by using the M6 screwdriver
3. Uninstall the anti-theft screws by using the M4 Inner-hexagon wrench, and uninstall
the mounting plate by using the M6 cross screw driver. Take the AC power lighting
protection box down from the pole.
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4. Put the faulty equipment into the moisture proof antistatic bag. Label the equipment
model, sector ID and fault information on the bag. Put the faulty equipment into the
carton and label with the same information as the antisatic bag.
5. Reinstall the proper AC power lighting protection box, fasten the anti-theft screws, and
install the mounting plate and cables. Wrap the cables with the water proof tape.
6. Power on the ZXSDR R8978.
– End of Steps –
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Chapter 6
Technical Specifications
Table of Contents
Physical Specifications ...............................................................................................6-1
Performance Indexes .................................................................................................6-1
Power Consumption ...................................................................................................6-2
Reliability Indexes ......................................................................................................6-2
Grounding Requirement .............................................................................................6-3
Lightening and Surge Protection ................................................................................6-3
6.1 Physical Specifications
Table 6-1 shows the physical specifications of the ZXSDR R8978.
Table 6-1 Physical Specifications
Item
Specification
Dimensions (H × W × D)
430 mm × 400 mm × 128 mm
Weight
21 kg
Volume
22 L
6.2 Performance Indexes
Table 6-2 shows the performance indexes of the ZXSDR R8978.
Table 6-2 Performance Indexes
Item
Index
Supported antenna types
Dual-polarized smart antenna ( a common antenna type)
Eight–antenna circular array smart antenna
RET antenna
Receiver sensitivity
TD-LTE: –105 dBm per channel
Frequency deviation
± 0.05 ppm
Installation
Supports installation in the equipment room.
The ZXSDR R8978 is generally installed outdoors. For
indoor installation, mount it on a pole or wall.
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Item
Index
Maximum distance between the outdoor
12 m
unit and the antenna
Filter
Optical module
Replaceable
Whether the rate is
Yes
downward compatible
Whether the optical
Yes
module can be
replaced on site
Optical fiber
Rate
2×6 Gbps / 2×10 Gbps
Number of cascade
One cascade level / 10 km
levels / Maximum
distance of a cascade
level
6.3 Power Consumption
Table 6-3 shows the power consumption specifications of the ZXSDR R8978.
Table 6-3 Power Consumption Specifications
Item
Power Consumption
DL: UL=2:2
400 W
DL: UL=3:1
580 W
6.4 Reliability Indexes
For a description of the reliability indexes of the ZXSDR R8978, refer to Table 6-4.
Table 6-4 Reliability Indexes
Item
Index
Protection level
IP66
Protection mode
Cast shell
MTBF
> 180000 h
MTTR
< 60 min
Availability
> 99.9994 %
Service interruption time
< 3 min/year
Annual Return Rate
<2%
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6.5 Grounding Requirement
In practical applications, the grounding resistance must be less than 10 Ω.
6.6 Lightening and Surge Protection
Table 6-5 shows the lightening protection specification of the ZXSDR R8978.
Table 6-5 Lightening Protection Specification
Item
Current
Lightening protection specification
20 kA
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Chapter 7
Environment Requirements
Table of Contents
Power Supply Requirements ......................................................................................7-1
Operating Environment...............................................................................................7-1
Storage Environment..................................................................................................7-2
7.1 Power Supply Requirements
Table 7-1 shows the requirements for the power supply of the ZXSDR R8978.
Table 7-1 Power Requirements
Item
Requirement
DC power supply
-48 V DC (fluctuation range: -57 V DC to –37 V DC)
The DC power supply must support the anti-reverse connection and
over-current protection functions.
AC power supply
100 V AC/110 V AC/220 V AC (fluctuation range: 90 VAC to 290 V AC)
If the AC power supply is used, the AC power needs to be converted into DC
power through the AC power lightening protection box and then connected
to the ZXSDR R8978.
7.2 Operating Environment
The ZXSDR R8978 can operate properly in the following conditions:
Climatic Environment Condition
Item
Description
Lowed temperature
-40 ℃
Highest temperature
55 ℃
Lowest relative humidity
2 %RH
Highest relative humidity
100 %RH
Temperature change rate
0.5 ℃/min
Lowest atmospheric pressure
70 kPa
Highest atmospheric pressure
106 kPa
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Item
Description
Solar radiation
1120 W/m2
Condensation
Allowed
Precipitation (rain, snow, and hail)
Allowed
Humidity
Wet surface is allowed
Freezing and frost
Allowed
Biological Environment Condition
Item
Description
Plants
Mold and fungus are allowed.
Animals
Rodents and other animals that damage the product are allowed, except
termites
Chemical Substance Environment Condition
Item
Description
Salt fog
Allowed
7.3 Storage Environment
To ensure normal operation after installation, the ZXSDR R8978 should be stored in a
package in a place with good protection.
Climatic Environment Condition
Item
Description
Lowed temperature
-55 ℃
Highest temperature
70 ℃
Lowest relative humidity
10 %RH
Highest relative humidity
100 %RH
Temperature change rate
1 ℃/min
Lowest atmospheric pressure
70 kPa
Highest atmospheric pressure
106 kPa
Solar radiation
1120 W/m2
Condensation
Allowed
Precipitation (rain, snow, and hail)
Allowed
Humidity
Wet surface is allowed
7-2
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Chapter 7 Environment Requirements
Item
Description
Freezing and frost
Allowed
Biologic Environment Condition
Item
Description
Plants
Mold and fungus are allowed.
Animals
Rodents and other animals that damage the product are allowed, except termites
Chemical Substance Environment Condition
Item
Description
Salt fog
Allowed
7-3
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ZXSDR R8978 User Manual
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7-4
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Figures
Figure 2-1 Position of the RRU in a Network ............................................................. 2-1
Figure 2-2 External View........................................................................................... 2-3
Figure 2-3 External Interfaces ................................................................................... 2-5
Figure 2-4 Chain Networking .................................................................................... 2-6
Figure 2-5 Star Networking ....................................................................................... 2-7
Figure 3-1 System Structure ..................................................................................... 3-1
Figure 3-2 Product Composition................................................................................ 3-2
Figure 3-3 LED Indicators ......................................................................................... 3-3
Figure 3-4 Protective Grounding Cable ..................................................................... 3-5
Figure 3-5 Connection of the Protective Grounding Cable......................................... 3-6
Figure 3-6 DC Power Input Cable ............................................................................. 3-7
Figure 3-7 Connection of DC Power Input Cable....................................................... 3-9
Figure 3-8 Connection of the LMT/TST Interface Cable .......................................... 3-10
Figure 3-9 Optical Fiber .......................................................................................... 3-11
Figure 3-10 Connection of the Optical Fiber ............................................................ 3-11
Figure 3-11 Antenna Feeder Interface Cable........................................................... 3-12
Figure 3-12 Connection of the Antenna Feeder Interface Cable .............................. 3-12
Figure 3-13 CAL Interface Cable............................................................................. 3-13
Figure 3-14 Connection of the CAL Interface Cable ................................................ 3-14
Figure 3-15 External Cable Connection .................................................................. 3-15
Figure 3-16 Software Composition .......................................................................... 3-16
Figure 4-1 ZTE Technical Support Contact Information ............................................. 4-2
Figure 4-2 Power-on Flow......................................................................................... 4-4
Figure 4-3 Connecting the RF cable.......................................................................... 4-9
Figure 4-4 Waterproof Treatment ............................................................................ 4-10
Figure 5-1 Junction Box ............................................................................................ 5-1
Figure 5-2 Junction Box Installation .......................................................................... 5-2
Figure 5-3 Interfaces and Cable Connection ............................................................. 5-3
Figure 5-4 External View........................................................................................... 5-4
Figure 5-5 Installation Modes.................................................................................... 5-5
Figure 5-6 Interfaces and Cable Connection ............................................................. 5-5
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Figures
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Tables
Table 2-1 Key Features of the ZXSDR R8978 S2300................................................ 2-3
Table 2-2 Key Features of the ZXSDR R8978 S2600................................................ 2-4
Table 2-3 Key Features of the ZXSDR R8978 S2600M ............................................. 2-4
Table 2-4 External Interface Description.................................................................... 2-5
Table 3-1 Subsystem Description.............................................................................. 3-1
Table 3-2 Indicator Descriptions ................................................................................ 3-4
Table 4-1 Fault Location Methods ............................................................................. 4-2
Table 4-2 Equipment Maintenance ............................................................................ 4-3
Table 4-3 Power-on Steps......................................................................................... 4-5
Table 4-4 Power-off Steps......................................................................................... 4-5
Table 5-1 Junction Box Specifications ....................................................................... 5-2
Table 5-2 Specifications of the AC Power Lightening Protection Box......................... 5-4
Table 6-1 Physical Specifications .............................................................................. 6-1
Table 6-2 Performance Indexes ................................................................................ 6-1
Table 6-3 Power Consumption Specifications............................................................ 6-2
Table 6-4 Reliability Indexes ..................................................................................... 6-2
Table 6-5 Lightening Protection Specification ............................................................ 6-3
Table 7-1 Power Requirements ................................................................................. 7-1
III
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Tables
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IV
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Glossary
AISG
- Antenna Interface Standards Group
ALM
- Alarm
ANT
- Antenna
BBU
- Base Band Unit
BSP
- Board Support Package
CFR
- Crest Factor Reduction
DIF
- Digital IF
DL
- Down Link
DPD
- Digital Pre-Distortion
EAM
- Electro-Absorption Modulation
GPS
- Global Positioning System
IP
- Internet Protocol
LMT
- Local Maintenance Terminal
LTE
- Long Term Evolution
MIMO
- Multiple-Input Multiple-Output
MTBF
- Mean Time Between Failures
MTTR
- Mean Time To Recovery
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ZXSDR R8978 User Manual
OAM
- Operation, Administration and Maintenance
OS
- Operating System
OSS
- Operation Support Subsystem
RF
- Radio Frequency
RGPS
- Remote GPS
RRU
- Remote Radio Unit
SDR
- Software Defined Radio
TCP
- Transmission Control Protocol
TD
- Time Division
TELNET
- Telecommunication Network Protocol
TRX
- Transceiver
UE
- User Equipment
UL
- Uplink
VSWR
- Voltage Standing Wave Ratio
eNodeB
- Evolved NodeB
VI
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