2. HUAWEI BTS3012 Hardware Structure

Page 1

Know the functions and features of BTS

Know the BTS hardware structure

Page 2

Base Trans Receiver Station

In cellular network system, BTS is an important part to implement

the air interface functions

RF Subsystem is the key part of BTS to exchange radio signals

Implement the air interface functions via the antenna

Provide the interface to the Common Subsystem via the interface

module.

Modulates/demodulates signals

Page 3

Location

PSTN ISDN

PSPDN

Um Interface

BTS3012

BTS3012

BTS3012

BTS3012

OMC

HLR/AUC/EIR

BSC

MSC/VLR

SMC/VM

A Interface

MAPMAP

TUP,ISUPMS

MS

MSNSS

Page 4

Functions (BTS)

BTS is the radio part of the BSS

It implements the radio transmission and radio channel contro

l for its subscribers (MSs) through the air interface

It also provides the wired interface functions to BSC.

BTS is the radio transceiver controlled by the BSC to serve a

certain cell

Page 5

BTS consists of

RFS (Radio Frequency Subsystem)

Common subsystem

Page 7

BTS3012 Cabinet and Boards (for 18TRXs)

For 18

TRXs

Page 9

Common Subsystem

DTMU Transmission/Timing/Management Unit for DTRU BTS

DEMU Environment Monitoring Unit for DTRU BTS

DCSU Combined cabinet Signal connection Unit for DTRU BTS

DCCU Cable Connection Unit for DTRU BTS

DATU Antenna and TMA control Unit for DTRU BTS

Page 10

Functions of DTMU

Controls, maintains, and operates the BTS Downloads software for the BTS Provides fault management, configuration management,

performance management, and security management Provides centralized clock distribution and management of

the entire BTS, and the hot backup of the clock unit Provides backup for the E1 ports and the main control unit Monitors the external fan control board and the power

modules

Page 11

Functions of DEMU

The DEMU guarantees the normal operation of the BTS by monitoring the

surrounding environment.

The DEMU performs the following functions:

Monitors the environment information sent from the smoke sensor,

water sensor, temperature and humidity sensor, infrared sensor, and

door control sensor.

Collects alarm information and reports it to the DTMU.

Page 12

Functions of DCSU

The Combined cabinet Signal connection Unit for DTRU BTS (DCSU) is

placed in slot 5 of the common subrack. The DCSU is a mandatory board.

Only one DCSU can be configured.

The DCSU performs the following functions:

Transmits clock signals, data signals, and control signals between the

main cabinet and the extension cabinet.

Transmits the clock signals, data signals, and control signals from the

DTMU to the DTRU ( for BTS3012Ⅱ) or QTRUs ( for 36TRXs).

Page 13

Double transceiver subsystem (BTS3012 )Ⅱ

DTRU (Double Transceiver Unit)

DTRB

Page 14

Functions of DTRU (BTS3012 )Ⅱ Baseband Processing Part

Processes the signaling, such as coding, decoding, interleaving, de-interleaving, modulation, and demodulation.

Amplifies the output power.

RF Transmitting Part

Modulates the baseband signals into RF signals , and performs frequency hopping.

Transmit RF signal to DDPU.

RF Receiving Part

Demodulates the RF signals into baseband signals, and performs frequency hopping.

Divides the received RF signals and performs receive diversity.

Page 15

Functional structure of DTRU (BTS3012 )Ⅱ

DTRU Baseband and RF Unit (DBRU)

DTRU Power Amplifier Unit (DPAU)

DTRU Power Supply Unit (DTPS)

DTMU

DTPS

DTRU

- 48V DC

DPAU

DBRUDAFU

Page 16

RF Front-End Subsystem (BTS3012 )Ⅱ

The functions of the BTS3012 RF front-end subsystem are Ⅱperformed by the boards in the DAFU subrack.

The DAFU subrack can be configured with the DDPU, DCOM, DFCU, DFCB, or the combination of these modules.

DDPU (Dual Duplexer Unit for DTRU BTS)

DCOM (Combining Unit for DTRU BTS)

DFCU (Filter Combiner Unit for DTRU BTS)

DFCB (Filter Combiner Unit for DTRU BTS)

Page 17

Functions of DDPU (BTS3012 )Ⅱ

The DDPU performs the following functions:

Provides lightning protection through the ANT port.

Detects VSWR alarms in the antenna system.

Receives the gain control signals for the low noise amplifier.

Transmits multiple routes of RF signals from the transmitter to

the antenna.

Receives signals from the antenna, amplifies and quarters

these signals, and then transmits them to the receiver of the

DTRU.

Page 18

Thank you

Page 20

Functions of DCCU The DCCU is placed in slot 6 of

the DCMB in the common subrack. The DCCU is a mandatory board. Only one DCCU can be configured.

The DCCU performs the following functions:

Transfers E1 signals.

Transfers the control signals for the fans.

Transfers the clock signals from the DAFU subrack.

Processes the power inputs through the EMI filter, and then transmits the power to the common subrack.

Page 21

Functions of DATU

The DATU can be installed in slot 2, 3, 4, or 7 of the DCMB in the common subrack. The DATU is an optional board. A maximum of two DATUs can be configured.

The DATU performs the following functions:

Controls the RET antenna.

Provides power for the TMA over the feeder.

Reports alarms related to the control of the RET antenna.

Monitors the current from the feeder.

DATU

RUN

ACT

ALM

ANT0

ANT1

ANT2

ANT3

ANT4

ANT5

Page 22

Functions of ECMB (Enhanced Common Back Plane

The ECMB is the backplane for the common subrack and DTRU subrack 0. The ECMB is a mandatory board. There are 10 slots on the ECMB.

The ECMB provides power and signal circuits for the boards in the common subrack and DTRU subrack 0. The ECMB transmits signals from the boards in the common subrack to the DCCU. The ports on the DCCU then transmit the signals to the boards in other subracks. The ECMB transmits the in-position signals of the DTRUs in DTRU subrack 0 to the DTMU.

The ECMB performs the following functions:

Provides signal circuits for connecting the boards in the common subrack.

Provides –48 V power circuits for the boards in the common subrack.

Provides bus connection between the common subsystem and the double-transceiver subsystem.

Specifies the slot number and rack number of the DTRUs in DTRU subrack 0.

Transmits the in-position signals of the DTRUs in DTRU subrack 0 to the DCCU.

Page 23

Relation between boards and slot numbers

Board Slot No.

DTMU Slots 0 and 1

DEMU Slots 2, 3, 4,or 7

DATU Slots 2, 3, 4,or 7

DCSU Slot 5

DCCU Slot 6

Page 24

Signal Protection Subsystem

DMLC (Monitor Signal Lightning-Protection Card for DTRU BTS)

DELC (E1 Signal Lightning-Protection Card for DTRU BTS)

DSAC (Signal Access Card for DTRU BTS)

D

M

L

C

D

E

L

C

D

E

L

C

D

S

A

C

DC

F

CK

B2

CK

B1

Page 25

Functions of DMLC

The DMLC is configured in slot 0, 1, or 2 of the set-on-top subrack. The DMLC is an optional board, which is used with the DEMU. Only one DMLC is required in full configuration.

The DMLC performs the following functions:

Provides lightning protection for Boolean input and output signals.

Provides lightning protection for analog signals that are transmitted from the smoke sensor, water sensor, door control sensor, infrared sensor, humidity and temperature sensor.

SWIN

SWOUT

DMLC

AIN

Page 26

Functions of DELC

The DELC is configured in slot 0, 1, or 2 of the set-on-top subrack. These three slots are shared by the DELC and DMLC. The DELC is a mandatory board. At least one DELC should be configured.

The DELC provides lightning protection for 4 routes of E1 signals. A maximum of three DELCs can be configured to provide lightning protection for 12 routes of E1 signals.

The DELC performs the following functions:

Provides lighting protection for E1 signals.

Transmits E1 signals to the DCCU, through which the signals are sent to the DTMU for processing.

DELC

TR

Page 27

Functions of DSAC

The DSAC is placed in slot 3 of the set-on-top subrack. The DATU is a mandatory board. Only one DSAC is required in full configuration.

The DSAC performs the following functions:

Provides six Boolean alarm inputs.

Provides two CBUS3 signal outputs.

Provides two lightning protection arrester failure alarm inputs of the power supply.

Provides lightning protection for BITS clock signals.

DSAC

CO

M1

EA

CS

YN

CC

OM

2S

1+

S1

-S2

+S

2-

Page 28

Panels on DTRU (BTS3012 )Ⅱ

There are two types of

DTRU: type A and type

B. The four LEDs on th

e DTRU panel indicate

the operating status of

the DTRU and other fu

nctional subsystems.

DTRU (type A) has 10

ports and DTRU (type

B) has 8 ports. These

ports exchanges signal

s with the RF front-end

subsystem.

DTRU panel (type

A) DTRU panel (type B)

Page 29

LEDs on the DTRU panel

LED Color Description Status Remarks

RUN Green Operating and power-on indicator of the DTRU

On There is power supply. However, the module is faulty.

Off There is no power supply or the module is faulty.

Slow flash (on for 2 s and off for 2 s)

The module is starting.


The module works normally.

Fast flash (on for 0.2 s and off for 0.2 s)

The DTMU is issuing configuration data to the DTRU.

ACT Green Operating indicator of the transceiver

On The DTRU is operating. (The DTMU issuing configuration data normally and the cells starts) All the channels on the two TRXs operate normally.

Off The communication between the DTRU and the DTMU is not established.


A part of logical channels work normally (before and after TRX mutual aid).

ALM Red Alarm indicator On (including high-frequency flash)

Critical alarm (The module is faulty.)

Off The module is normal.

RF_IND Red RF indicator On There is voltage standing wave radio (VSWR) alarm.

Off Normal


There is a radio link alarm.

Page 30

Ports on DTRU (type A) panel

Port Type Remarks

TX1 N female connector

It is the output port for the signals from TRX1.• In transmit independency or transmit diversity mode, the TX port routes the signals

to the TX port of the module in the RF front-end subrack.• In PBT or wideband combination mode, the TX1 port routes the signals to the IN1

port.

IN1 SMA female connector

In PBT or wideband combination mode, the IN1 port is short-circuited with the TX1 port.

TCOM N female connector

In PBT or wideband combination mode, the TCOM port is used to output the combined signals from the IN1 and IN2 ports.

IN2 SMA female connector

In PBT or wideband combination mode, the IN2 port is short-circuited with the TX2 port.


It is the output port for the signals from TRX2.• In transmit independency or transmit diversity mode, the TX port routes the signals

to the TX port of the module in the RF front-end subrack.• In PBT or wideband combination mode, the TX2 port routes the signals to the IN2

port.

RXM1 SMA female connector

• In receive independency or receive diversity mode, it is the input port for the main RF signal.

• In 4-way receive diversity mode, it is the input port for the diversity signal 1.

RXD1 SMA female connector

• In receive independency or receive diversity mode, it is the input port for the diversity RF signal.



• In receive independency mode, it is the input port for the main RF signal.• In 4-way receive diversity mode, it is the input port for the diversity signal 3.


• In receive independency mode, it is the input port for the diversity RF signal.• In 4-way receive diversity mode, it is the input port for the diversity signal 4.

PWR 3V3 power connector

Power input port

Page 31

Ports on DTRU (type B) panel

Port Type Remarks

TX1 N female connector It is the output port for the signals from TRX1.• In transmit independency or transmit diversity mode, the TX port routes the

signals to the TX port of the module in the RF front-end subrack.• In PBT or wideband combination mode, this port is suspended.

TCOM N female connector In PBT or wideband combination mode, the TCOM port is used to output the combined signals from the TX1 and TX2 ports.

TX2 N female connector It is the output port for the signals from TRX2.• In transmit independency or transmit diversity mode, the TX port routes the

signals to the TX port of the module in the RF front-end subrack.• In PBT or wideband combination mode, this port is suspended.


• In receive independency or receive diversity mode, it is the input port for the main RF signal.



• In receive independency or receive diversity mode, it is the input port for the diversity RF signal.



• In receive independency mode, it is the input port for the main RF signal.• In 4-way receive diversity mode, it is the input port for the diversity signal 3.


• In receive independency mode, it is the input port for the diversity RF signal.• In 4-way receive diversity mode, it is the input port for the diversity signal 4.

PWR 3V3 power connector

Power input port

Page 32

DTRU transmit modes

Transmit independency

Transmit diversity

PBT

Wideband combination

Page 33

DTRU transmit mode-transmit independency

TCOM

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

Page 34

DTRU transmit mode-transmit diversity

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Man made multi way

combinercombiner

Page 35

DTRU transmit mode-PBT

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Same phase

combinercombiner

Page 36

DTRU transmit mode-wideband combination

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

combinercombiner

Page 37

DTRU receive modes

Receive independency

Receive diversity

4-way receive diversity

Page 38

DTRU receive mode- Receive independency

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

dividerdivider

combinercombiner

dividerdivider

Page 39

DTRU receive mode- Receive diversity

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

dividerdivider

dividerdivider

Page 40

DTRU receive mode- 4-way receive diversity

TRX0TRX0

TX

TRX1TRX1

TXdividerdivider

dividerdivider

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

Page 41

Intra structure of DTRU

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

dividerdivider

dividerdivider

Page 42

Functions of DTRB (BTS3012 )Ⅱ

The DTRB is placed in the DTRU subrack. The DTRB provides six slots to house the DTRUs.

The DTRB connects the DCSU with the DTRU.

The DTRB performs the following functions:

Provides bus connection between the common subsystem and the double-transceiver subsystem.

Specifies the slot number and rack number of the DTRU.

Transmits the in-position signals of the DTRUs to the DCSU.

Page 43

Functional structure of the DDPU

Page 44

LEDs on the DDPU panel

RUNALM

VSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTAANTB

LED Color Description Status Meaning

RUN Green Operating and power-on indicator of the DDPU

On There is power supply. However, the module is faulty.

Off There is no power supply or the module is faulty.

Slow flash (on for 1s and off for 1s)

The module works normally.

Fast flash (on for 0.2s and off for 0.2s)

The DTMU is issuing configuration data to the DDPU or the DDPU is loading software programs.

ALM Red Alarm indicator

On (including high-frequency flash)

Alarms (including VSWR alarm). This indicates that there are faults.

Off No alarm


The DDPU is starting or loading the latest application.

VSWRA Red VSWR alarm indicator for channel A


There is a VSWR alarm with channel A.

On There is a critical VSWR alarm with channel A.

Off There is no VSWR alarm with channel A.

VSWRB Red VSWR alarm indicator for channel B


There is a VSWR alarm with channel B.

On There is a critical VSWR alarm with channel B.

Off There is no VSWR alarm with channel B.

Page 45

Ports on the DDPU panel

RUNALM

VSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTAANTB

Port Type Description

COM DB26 female connector Receiving control signals, communication signals, and clock signals from the DCTB of the BTS3012

POWER 3V3 power connector Power input port

TXA N female connector• It is the imput port for the signals received from the TX1 or TX2 po

rt from the DTRU.

TXB N female connector

• It is the input port for the combined signals from the TCOM port of the DTRU.

• It is the input port for the combined signals from the TX-COM port of the DCOM.

RXA1

SMA female connectorIt is the output port for the main RF signal received from the ANTA port. It is connected to the RXM1, RXD1, RXM2, or RXD2 port on the DTRU panel.

RXA2

RXA3

RXA4

RXB1

SMA female connectorIt is the output port for the diversity RF signal received from the ANTB port. It is connected to the RXM1, RXD1, RXM2, or RXD2 port on the DTRU panel.

RXB2

RXB3

RXB4

ANTA

DIN female connector

Antenna port for reception and transmission

• It is the input port for the RF signals received from the antenna.

ANTB

• It is the output port for the RF signals transmitted from the TXA port of the DDPU.

• It is connected to the indoor 1/2-inch jumper of the BTS3012 or to the Bias-Tee.

Page 46

Functions of DCOM (BTS3012 )Ⅱ

The DCOM is placed in the DAFU subrack. It can be inserted in the DAFU subrack with the DDPU.

The DCOM is optional and up to three DCOMs can be configured. The precondition for configuring the DCOM is that the wideband combination function in the DTRU must be used when there is an additional requirements for the combination of signals.

The DCOM combines two routes of TX signals from the DTRU, and then sends them to the DDPU.

DCOM

TX-COM

TX2

TX1

ONSHELL

Page 47

Ports on the DCOM panel

Port Type Description

ONSHELL DB26 female connectorIt exports the in-position signals of the DCOM to the DCTB of the BTS3012.

TX-COM N female connectorIt is the output port for the signals combined from the TX1 and TX2 ports of the DCOM.

TX1 N female connectorIt is the input port for the combined signals from the DTRU to the DCOM.


Page 48

Functions of the Fan Box The fan box forms a loop with the air inlet box to provide forced ventilation

and dissipation for the common subrack, DTRU subrack, and DAFU subrack.

The fan box performs the following functions:

Monitors the temperature at the air inlet of the cabinet and the temperature in the fan subrack, and then adjusts the speed of the fans.

Communicates with the DTMU to adjust the speed of the fans and report alarms.

FANSTATE

COM

PWR

Page 49

LEDs on the fan box

LED Color Status Description

STATE Green Fast flash (on for

0.125 s and off

for 0.125 s)

The NFCB communicates with the

DTMU abnormally. There is no alarm.

Red Fast flash (on for

0.125 s and off

for 0.125 s)

An alarm is generated.

Green Slow flash (on for

1 s and off for 1

s)

The board operates normally.

Orange (red

and green)

On The software of the board is being

upgraded.

Green or red

or orange

Off There is no power supply or the board

is faulty.

Page 50

Chapter 1 OverviewChapter 1 Overview

Chapter 2 System ComponentsChapter 2 System Components

Chapter 3 Signal ProcessingChapter 3 Signal Processing

Chapter 4 Typical configurationChapter 4 Typical configuration

Page 51

Signal Flow of the BTS3012 Ⅱ

The BTS3012 signal flow is associated with the traffic and Ⅱsignaling of the BTS.

The BTS3012 signal flow consists of:Ⅱ

DL traffic signal flow

UL traffic signal flow

Signaling processing signal flow

Signal flow for cabinet groups

Page 52

DL Traffic Signal Flow of the BTS3012 Ⅱ

Page 53

DL Traffic Signal Flow The DL traffic signal flow is as follows:

The BSC sends E1 signals to the DELC through E1 cables. The DELC provides lightning protection for the received E1 signals, and then sends the E1

signals to the DCTB. The DCTB sends the E1 signals to the DCCU through the TOP signal cable connecting the

DCTB with the DCCU/DSCU. The DCCU sends the E1 signals to the DTMU through the ECMB. On receiving the signals, the DTMU converts the E1 signals through the DBUS. The DTMU

also assigns the data based on the data configuration on the OML. Then, the signals are sent to the DCSU and the DTRUs in DTRU subrack 0 through the ECMB.

The DCSU sends the signals to the DTRB in DTRU subrack 1 through the signal cable between the DCSU and the DTRB.

The DTRB sends the signals to the DTRUs in DTRU subrack 1. After receiving the signals, the DTRUs in the two DTRU subracks perform digital filtering, up-

conversion, and filter amplification, and then send the signals to the DDPU/DFCU/DFCB. The duplexer in the DDPU/DFCU/DFCB filters the signals from the DTRU, and then sends

the signals to the antenna subsystem for transmission.

Page 54

UL Traffic Signal Flow of the BTS3012 Ⅱ

Page 55

UL Traffic Signal Flow

The UL traffic signal flow is as follows:

The antenna receives the signals from the MS. After being amplified by the

TMA, the signals are transmitted to the DDPU/DFCU/DFCB through the

feeder. The TMA is optional. It is used to compensate the feeder loss and

enhance receive sensitivity of the DDPU/DFCU/DFCB antenna port.

The DDPU/DFCU/DFCB receives the UL signals and transmits the signals

to the DTRUs in the two DTRU subracks after they are filtered by the

duplexer and amplified by the lower noise amplifier (LNA).

The DTRU in DTRU subrack 1 receives the signals from the

DDPU/DFCU/DFCB and transmits the signals to the DTRB after

amplification and down-conversion.

The DTRB sends the signals to the DCSU.

Page 56

UL Traffic Signal Flow

The DCSU sends the signals to the DTMU through the ECMB. In addition, the

DTRU in DTRU subrack 0 receives the signals from the DDPU/DFCU/DFCB,

and transmits the signals to the DTMU through the ECMB after amplification and

down conversion.

The DTMU backs up the E1 signals and converts the E1 signals through the

DBUS. The DTMU then sends the converted signals to the DCCU through the

ECMB.

The DCCU sends the signals to the DCTB through the TOP signal cable

connecting the DCTB with the DCCU/DSCU.

The DCTB sends the signals to the DELC.

The DELC provides lightning protection for the signals. Then, it sends the

signals to the BSC through the E1 cables.

Page 57

Signaling Flow of the BTS3012 Ⅱ

Page 58

Signaling processing flow

The signaling processing flow is as follows:

The BSC sends the signaling data to the DTMU of the BTS.

After processing the signaling, the DTMU sends the signaling to the DTRU and DDPU (DFCU or DFCB).

The DTRU and DDPU (DFCU or DFCB) report their board status to the DTMU.

The DTMU obtains the status of the BTS3012 by collecting and analyzing the states of all the boards. Then, it transmits the information to the BSC through the Abis interface.

Page 59

Signal Flow of BTS3012 Cabinet Groups Ⅱ

The signal flow of BTS3012 cabinet groups refers to the signal flow

between the main cabinet group and the extension cabinet groups.

The signal flow of cabinet groups involves clock signals and control

signals.

Bus connection between BTS3012 cabinet groups is shown as Ⅱfollows:

Page 60

Clock Signals

DTMUBoards in main

cabinet

Boards in slavecabinet

A-bis

Clock distributioncable between

cabinets

Page 61

Clock Signals Description

The clock signal flow includes the following steps:

The external reference clock is transmitted to the clock module in the DTMU through the Abis interface

The clock module performs phase lock and frequency division on the clock signals to generate different clock signals for BTSs

The clock signals are transmitted to the modules in the main cabinet such as the DTRU and the DDPU

The clock signals are transmitted to the modules in the slave cabinets through the clock distribution cable

Page 62

Chapter 1 OverviewChapter 1 Overview

Chapter 2 System ComponentsChapter 2 System Components

Chapter 3 Signal ProcessingChapter 3 Signal Processing

Chapter 4 Typical configurationChapter 4 Typical configuration

Page 63

Configuration Principles for the BTS3012 Ⅱ

Configure the BTS3012 according to the following principles:

Use a minimum number of antennas.

Use a minimum number of cabinets.

Configure all the TRXs that belong to one synchronized cell in one cabinet group.

Adhere to the following principles when configuring the BTS3012 cabinets:

If less than 18 TRXs are required in the synchronized cells of a site, use one cabinet to configure the site.

If more than 18 TRXs are required in the synchronized cells of a site, use cabinet groups to configure the site.

Page 64

Configuration Features for the BTS3012 Ⅱ

The BTS3012 has the following features in terms of configuration:

Supports omnidirectional cell coverage and directional cell coverage

Supports the grouping of three cabinets

The RF TX mode supports wideband combining, PBT, transmit diversity, and non-combining. The DTRU connected to the DFCU does not support the wideband combining mechanism.

The RF RX mode supports the receive diversity, independent receive, and four-way receive diversity.

Page 65

Typical Configuration of One BTS3012 Ⅱ Cabinet S2/2/2

The right figure shows

the cabling of RF cables

in an S2/2/2 cell. The

RF TX cable is blue, the

RF RX cable is red, and

the combining short-

circuiting signal cable is

black.

Page 66

The right figure shows th

e cabling of RF cables in

an S6/6/6 cell.

Typical Configuration of One BTS3012 Ⅱ Cabinet S6/6/6

Page 67

Functions and features of BTS3012

BTS3012 hardware structure

System Signal Flow

Typical configuration

SummarySummary

www.huawei.com

Thank You

Documents

2. HUAWEI BTS3012 Hardware Structure