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4Boards and Modules of the BTS3012AEAbout This Chapter

The BTS3012AE boards are the DTMU, DATU, DCSU, DCCU, DCMB, DELU, DMLU,

DGLU, NPMI, DSCB, and DTRB. The BTS3012AE modules are the DTRU, DCOM, DDPU,

DFCU, DFCB, DPMU, PSU, and fan box.

4.1 List of the BTS3012AE Boards and Modules (AC)




4.2 DATUThe Antenna and TMA Control Unit for DTRU BTS (DATU) shares the slots with the DEMU.

The DATU isan optional board. A maximum of two DATUs can be configured.

4.3 DCCU

The Cable Connection Unit for DTRU BTS (DCCU) is placed in slot 6 of the common subrack.

The DCCU ismandatory. A maximum of one DCCU can be configured.

4.4 DCMB

The Common Module Backplane for DTRU BTS (DCMB) is configured in the common subrack

of the BTS3012/BTS3012AE cabinet. The DCMB is mandatory. There are nine slots on the

board.

4.5 DCOMThe Combining Unit for DTRU BTS (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.

4.6 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.

4.7 DDPU

The Dual-Duplexer Unit for DTRU BTS (DDPU) is configured in the DAFU subrack with theDCOM. The DDPU is an optional module. You can choose to configure DDPU or DFCU.

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Generally, three DDPUs are configured. If the DCOM is not configured, a maximum of six

DDPUs can be configured.

4.8 DELU

The E1 Signal Lightning-Protection Card for DTRU BTS (DELU) is installed in the signal

lightning protection subrack. It is configured in slot 0 or 2 (from bottom to top) of the DSCB.The DELU is mandatory. A maximum of two DELUs can be configured.

4.9 DFCB

The Filter Combiner Unit for DTRU BTS (DFCB) is located in the DAFU subrack of the RF

front-end subsystem. It is an optional module. The BTS3012/BTS3012AE can be configured

with the DDPU or the DFCU/DFCB.

4.10 DFCU

The Filter Combiner Unit for DTRU BTS (DFCU) is located in the DAFU subrack of the RF

front-end subsystem. TheDFCU is optional. The BTS3012/BTS3012AE can be configured with

the DDPU or the DFCU.

4.11 DGLUThe Combined Group Signal Lightning-Protection Unit for DTRU (DGLU) is installed in the

signal lightning protection subrack. The DGLU is optional. Only one DGLU can be configured.

4.12 DMLU

The Monitor signal Lightning-protection Unit for DTRU BTS (DMLU) is installed in slot 1 on

the DSCB in the signal lightning protection subrack. The DMLU is optional. Only one DMLU

can be configured.

4.13 DSCB

The Cabinet Signal Connection Backboard (DSCB) is installed in the lightning protection

subrack. It has three slots. Slot 0 holds only the DELU. Slot 1 holds the DGLU or the DMLU.

Slots 2 holds the DGLU or the DELU.

4.14 DTMU

The Transmission/Timing/Management Unit for DTRU BTS (DTMU) is an entity for basic

transmission and control in the BTS3012. It works as a main controller. The DTMU is a

mandatory module. It is installed in slots 1 and 2 of the common subrack.

4.15 DTRB

The Double-Transceiver Unit Backplane (DTRB) is placed in the DTRU subrack. The DTRB

provides six slots to house the DTRUs.

4.16 DTRU

The Double-Transceiver Unit (DTRU) is placed in the double-transceiver subsystem of the BTS.

One DTRU consists of two TRXs.

4.17 DPMU

The Power and Environment Monitoring Unit for DTRU BTS (DPMU) is installed in the power

subrack of the BTS3012AE cabinet.

4.18 NPMI

The NodeB Power Monitor unit Interface Board (NPMI) is installed on the top of the

BTS3012AE cabinet.

4.19 PSU (AC)

The Power Supply Unit (PSU) is installed in the power subrack of the BTS3012AE cabinet.

4.20 Fan Box

4 Boards and Modules of the BTS3012AE

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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.

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4.1 List of the BTS3012AE Boards and Modules (AC)




Table 4-1lists the boards and modules of the BTS3012AE.

Table 4-1Boards and modules of the BTS3012AE

Subrack Board/Module Full Name ConfigurationQuantity of a SingleCabinet

Full

Configuration

Maximu

mConfiguration

Common

subrack

DTMU Transmission/Timing/

Management Unit for

DTRU BTS

2 1

DATU Antenna and TMA

Control Unit for DTRU

BTS

2 0

DCSU Combined cabinet

Signal connection Unitfor DTRU BTS

1 1

DCCU Cable Connection Unit

for DTRU BTS

1 1

DCMB Common Module

Backplane for DTRU

BTS

1 1

Signal

lightning

protection

subrack

DELU E1 Signal Lightning-

Protection Unit for

DTRU BTS

3 1

DMLU Monitor Signal

Lightning-Protection

Unit for DTRU BTS

1 0

DGLU Combined Group

Signal Lightning-

Protection Unit for

DTRU

1 0

DTRU subrackDTRU Double-Transceiver

Unit

6 1


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Subrack Board/Module Full Name ConfigurationQuantity of a SingleCabinet

FullConfiguration

MaximumConfiguration

DTRB Double-Transceiver

Unit Backplane

1 1

DAFU subrack

DCOM Combining Unit for

DTRU BTS

3 0

DDPU Dual-Duplexer Unit for

DTRU BTS

6 0

DFCU Filter Combiner Unit

for DTRU BTS

3 0

DFCB Filter Combiner Unit

for DTRU BTS

1 0

Power

subsystem

DPMU Power and

Environment

Monitoring Unit for

DTRU BTS

1 1

PSU Power Supply Unit 7 1

Fan subrack Fan box Fan Box 1 1

-NPMI NodeB Power Monitor

unit Interface Board

1 1

4.2 DATU

The Antenna and TMA Control Unit forDTRU BTS (DATU) shares the slots with the DEMU.

The DATU is an optional board. A maximum of two DATUs can be configured.

4.2.1 Functions of the DATUThis part describes the functions of the DATU.

4.2.2 Working Environment of the DATU

This part describes the working environment of the DATU.

4.2.3 LEDs and Ports on the DATU

This part describes the LEDs and ports on the DATU panel. The three LEDS on the DATU panel

indicate the working status of the DATU.Three ports on the DATU panel provide power for the

TMA, whereas the other three ports provide power for the TMA and transmit control signals for

the RET antenna.

4.2.4 DIP Switches on the DATU

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This part describes the DIP switches on the DATU. There are three DIP switches on the DATU:

SW1, SW2, and SW3. SW1 enables the loading of single-chip microcomputers in case of

debugging. SW2 to SW3 enable the power supply to the antenna through the feeder.

4.2.5 Specifications for the DATU

This part describes the dimensions, working voltage, power consumption, and weight of theDATU.

4.2.1 Functions of the DATU

This part describes the functions of the DATU.

The DATU performs the following functions:

l Controls the RET antenna

l Provides power for the TMA over the feeder

l Reports alarms related to the control of the RET antenna

l Monitors the current from the feeder

4.2.2 Working Environment of the DATU

This part describes the working environment of the DATU.

Figure 4-1shows the working environment of the DATU.

Figure 4-1Working environment of the DATU

The DATU receives and processes the signals from the DTMU, and then generates the RET

control signals. The DATU also supplies power for the TMA through the Bias-Tee. The DATU

communicates with the DTMU through CBUS3.

4.2.3 LEDs and Ports on the DATU

This part describes the LEDs and ports on the DATU panel. The three LEDS on the DATU panel

indicate the working status of the DATU. Three ports on the DATU panel provide power for the

TMA, whereas the other three ports provide power for the TMA and transmit control signals for

the RET antenna.

Figure 4-2shows the DATU panel.


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Figure 4-2DATU panel

DATU

RUN

ACT

ALM

ANT0

ANT1

ANT2

ANT3

ANT4

ANT5

Table 4-2describes the LEDs on the DATU panel.

Table 4-2LEDs on the DATU panel

LED Color Description

Status Meaning

RUN Green Indicates

the

working

status of

the board

Slow flash (on

for 2s and off for

2s)

There is power supply but the

communication with the DTMU is

abnormal.

Slow flash (on

for 1s and off for

1s)

The board is running normally and

the communication with the

DTMU is normal.

Off There is no power supply or the

board is faulty.

ACT Green Indicates

the

working

status of

the

services

On The AISG link is normal.

Off The AISG link is abnormal.

Fast flash at

irregular

intervals

There is transmission on the AISG

link.

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Status Meaning

ALM Red Alarm

LED

On An alarm is generated, such as an

overcurrent alarm.

Off The board is running normally.

Table 4-3describes the ports on the DATU panel.

Table 4-3Ports on the DATU panel

Port Type Function

ANT0 SMA female

connector

Provides power for the RET antenna and

transmits control signals for the RET antenna

ANT1 SMA female

connector

Provides power for the antenna

ANT2 SMA female

connector



ANT3 SMA female

connector

Provides power for the antenna

ANT4 SMA female

connector



ANT5 SMA femaleconnector Provides power for the antenna

4.2.4 DIP Switches on the DATU

This part describes the DIP switches on the DATU. There are three DIP switches on the DATU:

SW1, SW2, and SW3. SW1 enables the loading of single-chip microcomputers in case of

debugging. SW2 to SW3 enable the power supply to the antenna through the feeder.

Figure 4-3shows the layout of the DIP switches on the DATU and their factory settings.


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Figure 4-3Layout of the DIP switches on the DATU

ON

OFF

SW141

4 1

SW3

4 1

SW2

OFF

ON

OFF

ON

Table 4-4describes the settings of the DIP switches on the DATU.

Table 4-4Setting of DIP switches on the DATU

DIP Switch DIP Bit ON/OFF Remarks

SW1 1 ON Enables the single-chip microcomputer

loading in case of debugging

OFF Indicates the setting in normal working

mode

2 ON Enables the single-chip microcomputer


OFF Indicates the setting in normal working

mode

3 ON Indicates the setting in normal workingmode

OFF Enables the single-chip microcomputer


4 ON Indicates the setting in normal working

mode

OFF Enables the single-chip microcomputer


SW2 1 ON No.1 feed output: ON

OFF No.1 feed output: OFF

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DIP Switch DIP Bit ON/OFF Remarks

2 ON No.2 feed output: ON






SW3 1 ON No.5 feed output: ON




3 - Reserved

4 - Reserved

NOTE

The DIP switches on the DATU are set before delivery. There is no need to set them on site.

4.2.5 Specificationsfor the DATU

This part describes the dimensions, working voltage, power consumption, and weight of the

DATU.

Table 4-5describes the specifications for the DATU.

Table 4-5Specifications for the DATU

Item Specification

Dimension Dimension of the PCB (length x width x height): 280.0 mm x 233.4

mm x 2.0 mm

Dimension of the front panel (length x width): 261.0 mm x 30.5 mm

Working voltage 48 V power input

Power consumption

(heat consumption)

Maximum power consumption: 72 W

Weight 0.6 kg

4.3 DCCU

The Cable Connection Unit for DTRU BTS (DCCU) is placed in slot 6 of the common subrack.The DCCU is mandatory. A maximum of one DCCU can be configured.


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4.3.1 Functions of the DCCU

This part describes the functions of the DCCU.

4.3.2 Working Principles of the DCCU

This part describes the working principles of the DCCU. The DCCU consists of the signaltransfer unit and the EMI filtering unit.

4.3.3 Ports on the DCCU

This part describes the ports on the DCCU panel. There are four ports on the DCCU: TRAN,

To_FAN, TO_TOP1, and POWER.

4.3.4 Specifications for the DCCU

This part describes the dimensions and weight of the DCCU.

4.3.1 Functions of the DCCU

This part describes the functions of the DCCU.

The DCCU performs the following functions:

l Transfers E1 signals

l Transfers the control signals for the fans

l Transfers the clock signals from the DAFU subrack

l Processes the power inputs through the EMI filter, and then transmits the power to the

common subrack

4.3.2 Working Principles of the DCCU

This part describes the working principles of the DCCU. The DCCU consists of the signal

transfer unit and the EMI filtering unit.

Figure 4-4shows the working principles of the DCCU.

Figure 4-4Working principles of the DCCU

Signal transfer unit

DCCU

EMI filtering unit

DCMB

-48V

NFCB

DCTB

NOTE

The configuration of the DCTB in Figure 4-4shows that this is a BTS3012 cabinet. The BTS3012AE uses

the DSCBinstead of the DCTB.

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Signal Transfer Unit

The signals from the DCMB are transmitted to the DCCU through three 2 mm connectors. Then,

these signals are transmitted to the following parts through the connectors on the front panel of

the DCCU:

l Fan subrack and the DCTB on the set-on-top subrack of the BTS3012

l Fan subrack and the DSCB of the BTS3012AE

EMI Filtering Unit

The 48 V power flows through the EMI filter and then out to the DCMB for the use of other

boards in the common subrack.

4.3.3 Ports on the DCCU

This part describes the ports on the DCCU panel. There are four ports on the DCCU: TRAN,To_FAN, TO_TOP1, and POWER.

Figure 4-5shows the DCCU panel.

Figure 4-5DCCU panel

POWER

DCCU

To_FAN

TO_TOP1

TRAN

Table 4-6describes the ports on the DCCU panel.


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Table 4-6Ports on the DCCU panel

Port Type Description

TRAN MD64 female

connector

Imports E1 signals

To_FAN DB26 female

connector

Connects to the fan box through cables

TO_TOP1 MD64 female

connector

Connects to the DCTB in the set-on-top

subrack of the BTS3012 cabinet through cables

Connects to the DSCB of the BTS3012AE

through cables

POWER 3V3 power connector Exports power to the common subrack

4.3.4 Specificationsfor the DCCU

This part describes the dimensions and weight of the DCCU.

Table 4-7describes the specifications for the DCCU.

Table 4-7Specifications for the DCCU

Item Specification

Dimension Dimension of the PCB (length x width x height): 280.0 mm x 233.4

mm x 2.0 mm


Weight 0.7 kg

4.4 DCMB

The Common Module Backplane for DTRU BTS (DCMB) is configured in the common subrack

of the BTS3012/BTS3012AE cabinet. The DCMB is mandatory. There are nine slots on the

board.

4.4.1 Functions of the DCMB

This part describes the functions of the DCMB. The DCMB provides power and signal circuits

for the boards in the common subrack. The DCMB 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.

4.4.2 Specifications for the DCMB

This part describes the physical dimensions for the DCMB.

4.4.1 Functions of the DCMB

This part describes the functions of the DCMB. The DCMB provides power and signal circuitsfor the boards in the common subrack. The DCMB transmits signals from the boards in the

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common subrack to the DCCU. The ports on the DCCU then transmit the signals to the boards

in other subracks.

The DCMB performs the following functions:

l

Provides signal circuits for connecting the boards in the common subrackl Provides 48 V power circuits for the boards in the common subrack

4.4.2 Specifications for the DCMB

This part describes the physical dimensions for the DCMB.

Table 4-8describes the specifications for the DCMB.

Table 4-8Specifications for the DCMB

Item Specification

Dimension Dimension of the PCB (length x width x height): 259.3 mm x 246.0 mm

x 3.0 mm

Dimension of the front panel (length x width): The DCMB is a

backplane and has no front panel.

4.5 DCOM

The Combining Unit for DTRU BTS (DCOM) is placed in the DAFU subrack. It can be inserted

in the DAFUsubrack 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 combinationfunction in the DTRU must be used when there is an additional requirements for the combination

of signals.

4.5.1 Functions of the DCOM

This part describes the functions of the DCOM. The DCOM combines two routes of TX signals

from the DTRU, and then sends them to the DDPU.

4.5.2 Working Environment of the DCOM

This part describes the working environment of the DCOM. The DCOM receives two routes of

DL signals from the DTRU and combines them into one route. Then, the DCOM transmits the

combined signals to the DDPU, which sends the signals to the antenna for transmission.

4.5.3 Working Principles of the DCOM

This part describes working principles of the DCOM. The DCOM consists of a 3 dB electrical

bridge and a load of high power.

4.5.4 Ports on the DCOM

This parts describes the ports on the DCOM panel. There are four ports on the DCOM:

ONSHELL, TX-COM, TX1, and TX2.

4.5.5 Specifications for the DCOM

This part describes the dimensions and weight of the DCOM.


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4.5.1 Functions of the DCOM

This part describes the functions of the DCOM. The DCOM combines two routes of TX signals

from the DTRU, and then sends them to the DDPU.

4.5.2 Working Environment of the DCOM

This part describes the working environment of the DCOM. The DCOM receives two routes of

DL signals from the DTRU and combines them into one route. Then, the DCOM transmits the

combined signals to the DDPU, which sends the signals to the antenna for transmission.

Figure 4-6shows the working environment of the DCOM.

Figure 4-6Working environment of the DCOM

DTRUCBUS

DBUS

DTRU

TMA TMAMS

TBUSDCOM DDPU

DAFU

FH_BUS

DBUS/TBUS/CBUS

4.5.3 Working Principles of the DCOM

This part describes working principles of the DCOM. The DCOM consists of a 3 dB electrical

bridge and a load of high power.

Figure 4-7shows the working principles of the DCOM.

Figure 4-7Working principles of the DCOM

3-dB electrical bridge

TX1

TX2

TX1+TX2

Load of high power

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3 dB Electrical Bridge

It combines two routes of RF TX signals into one route.

Load of High PowerIt matches the 3 dB electrical bridge.

4.5.4 Ports on the DCOM

This parts describes the ports on the DCOM panel. There are four ports on the DCOM:

ONSHELL, TX-COM, TX1, and TX2.

Figure 4-8shows the DCOM panel.

Figure 4-8DCOM panel

DCOM

TX-COM

TX2

TX1

ONSHELL

Table 4-9describes the ports on the DCOM panel.

Table 4-9Ports on the DCOM panel


ONSHELL DB26 female

connector

Exports the in-position signals of the DCOMs to

the DCTB of the BTS3012

Exports the in-position signals of the DCOMs to

the DSCB of the BTS3012AE


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TX-COM N female connector Exports the combined signals to the DDPU

TX1 N female connector Imports the TX signals from the DTRU

TX2 N female connector Imports the TX signals from the DTRU

4.5.5 Specifications for the DCOM

This part describes the dimensions and weight of the DCOM.

Table 4-10describes the specifications for the DCOM.

Table 4-10Specifications for the DCOM

Item Specification

Dimension Dimension of the front panel (length x width): 383.6 mm x 70.6 mm

Weight 3.2 kg

4.6 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.

4.6.1 Functions of the DCSU

This part describes the functions of the DCSU.

4.6.2 Ports on the DCSU

This part describes the ports on the DCSU panel. There are four ports on the DCSU panel:

CC_OUT, CC_IN, TO_DTRB, and TOP2.

4.6.3 DIP Switches on the DCSU

This part describes the DIP switches on the DCSU. There are 14 DIP switches on the DCSU.

4.6.4 Specifications for the DCSU

This part describes the dimensions and weight of the DCSU.

4.6.1 Functions of the DCSU

This part describes the functions of the DCSU.

The DCSU performs the following functions:

l Transmits clock signals, data signals, and control signals between the main cabinet and the

extension cabinet

l Transmits the clock signals, data signals, and control signals from the DTMU to the DTRU

l Transmits the in-position signals of the DCOM, DDPU, or DFCU in the DAFU subrack to

the DCMB

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4.6.2 Ports on the DCSU

This part describes the ports on the DCSU panel. There are four ports on the DCSU panel:

CC_OUT, CC_IN, TO_DTRB, and TOP2.

Figure 4-9shows the DCSU panel.

Figure 4-9DCSU panel

CC_IN

CC_OUT

TO_DTRB

TOP2

DCSU

Table 4-11describes the ports on the DCSU panel.

Table 4-11Ports on the DCSU panel

Silk-Screen Type Remarks

CC_OUT MD64female

connector

Transmits signals to the other cabinet

CC_IN MD64

female

connector

Receives signals from the other cabinet

TO_DTRB MD64

female

connector

Connects to the DTRB through cables


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Silk-Screen Type Remarks

TOP2 DB26

female

connector

Connects to the DCTB in the set-on-top subrack of the

BTS3012 cabinet through cables

Connects to the DSCB of the BTS3012AE through cables

4.6.3 DIP Switches on the DCSU

This part describes the DIP switches on the DCSU. There are 14 DIP switches on the DCSU.

Figure 4-10shows the layout of the DIP switches on the DCSU and their initial settings.

Figure 4-10Layout of the DIP switches on the DCSU

ON

OFF

SW6SW7

1 4 1 4

SW9

1 4 1 4

SW10

SW8

1 4

ON

OFF

1 4

1 4

1 4

1 4

1 4

1 4

SW5

SW4

SW3

SW2

SW11

SW1

ON

OFF

ON

OFF

1 4

1 4

1 4

SW14

SW13

SW12

ON

OFF

Table 4-12describes the settings of SW1, which is used to set the main cabinet in the main

cabinet group. Table 4-13describes the settings of SW11, which is used to set the matchingterminal.

The settings of SW11 are as follows:

l When a single cabinet is used, all the DIP bits of SW11 should be set to ON.

l When two cabinet groups are used, all the DIP bits of SW11 for the cabinets should be set

to ON.

l When two cabinet groups are used, all the DIP bits of SW11 for the cabinets should be set

to ON.

l When three cabinet groups are used, the DIP bits of SW11 for the main cabinet in the main

cabinet group should be set to OFF. The other DIP bits of SW11 for other cabinets shouldbe set to ON.

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SW2 to SW5 are used to set the main cabinet and extension cabinet in a cabinet group.

Irrespective of the main cabinet group or extension cabinet group, the DIP bits of SW2 to SW5

for the main cabinet should be set to ON and the DIP bits for the extension cabinet should be

set to OFF. Table 4-14describes the settings of the DIP switches.

SW6 and SW7 are used to set E1 impedance. Table 4-15describes the settings of the DIPswitches.

SW8 is used to set the cabinet number. In a cabinet group, you need to set SW8 for the main

cabinet. You can use the default settings for the extension cabinets, that is, all the extension

cabinets should be set to ON. Table 4-16describes the settings of the DIP switches.

SW9 and SW10 are used to set the cabinet type. Table 4-17describes the setting of the DIP

switches.

Table 4-12Settings of SW1

SW1 Description

All ON Specifies the main cabinet of the main cabinet group

All OFF Not specified


SW11 Description

All ON CBUS1 terminal match

All OFF CBUS1 no terminal match

Table 4-14Settings of SW2SW5

SW2SW5 Description

All ON Specifies the main cabinet in the combined cabinets

All OFF Specifies the extension cabinet in the combined cabinets

Table 4-15Settings of SW6 and SW7

DIPSwitch

DIPBit

ON/OFF Description

SW6 1 ON Impedance for the first E1 cable: 75 ohms

OFF Impedance for the first E1 cable: 120 ohms

2 ON Impedance for the second E1 cable: 75

ohms

OFF Impedance for the second E1 cable: 120

ohms

3 ON Impedance for the third E1 cable: 75 ohms


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DIPSwitch

DIPBit

ON/OFF Description

OFF Impedance for the third E1 cable: 120 ohms

4 ON Impedance for the fourth E1 cable: 75 ohms

OFF Impedance for the fourth E1 cable: 120

ohms

SW7 1 ON Impedance for the fifth E1 cable: 75 ohms

OFF Impedance for the fifth E1 cable: 120 ohms

2 ON Impedance for the sixth E1 cable: 75 ohms

OFF Impedance for the sixth E1 cable: 120 ohms

3 ON Impedance for the seventh E1 cable: 75ohms

OFF Impedance for the seventh E1 cable: 120

ohms

4 ON Impedance for the eighth E1 cable: 75 ohms

OFF Impedance for the eighth E1 cable: 120

ohms


DIP Bits of SW8 Description

1 2 3 4

ON ON ON ON Main cabinet of the

main cabinet group

OFF OFF ON ON Main cabinet in

extension cabinet

group 1

ON OFF OFF ON Main cabinet in

extension cabinet

group 2

Table 4-17Settings of SW9 and SW10

DIP Bits of SW9 DIP Bits of SW10 Description

1 2-4 1-4

ON ON ON The cabinet type is

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DIP Bits of SW9 DIP Bits of SW10 Description

1 2-4 1-4

OFF ON ON The cabinet type is

BTS3012AE.

Others Undefined

4.6.4 Specifications for the DCSU

This part describes the dimensions and weight of the DCSU.

Table 4-18describes the specifications for the DCSU.

Table 4-18Specifications for the DCSU

Item Specification

Dimension Dimension of the PCB (length x width x height): 280.0 mm x 233.4 mm x

2.0 mm


Weight 0.7 kg

4.7 DDPU

The Dual-Duplexer Unit for DTRU BTS (DDPU) is configured in the DAFU subrack with theDCOM. The DDPU is an optional module. You can choose to configure DDPU or DFCU.

Generally, three DDPUs are configured. If the DCOM is not configured, a maximum of six

DDPUs can be configured.

4.7.1 Functions of the DDPU

This part describes the functions of the DDPU.

4.7.2 Working Environment of the DDPU

This part describes the working environment of the DDPU.

4.7.3 Working Principles of the DDPU

This part describes the working principles of the DDPU. The DDPU consists of the DDLC,

duplexer, and power coupler.

4.7.4 LEDs and Ports on the DDPU

This part describes the LEDs and ports on the DDPU panel. The two LEDs on the DDPU panel

indicate the working status of the DDPU. There are 14 ports on the DDPU. These ports include

antenna ports, TX ports, RX ports, communication port, and power port.

4.7.5 Specifications for the DDPU


DDPU.

4.7.1 Functions of the DDPU

This part describes the functions of the DDPU.


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The DDPU performs the following functions:

l Provides lightning protection through the ANT port

l Detects VSWR alarms in the antenna system

l Receives the gain control signals for the low noise amplifier

l Transmits multiple routes of RF signals from the transmitter to the antenna

l Receives signals from the antenna, amplifies and quarters these signals, and then transmits

them to the receiver of the DTRU

4.7.2 Working Environment of the DDPU

This part describes the working environment of the DDPU.

Figure 4-11shows the working environment of the DDPU.

Figure 4-11Working environment of the DDPU

DTRU

DBUS

TBUSDDPU

CBUS3

CBUS

DTRU DDPU

CBUS3

TMA TMAMS

MS

TMA TMA

Bias-Tee

Bias-Tee

Bias-Tee

Bias-Tee

DBUS/TBUS/CBUS

The working environment of the DDPU is as follows:

l The DDPU receives the UL signals from the antenna, filters and amplifies them, and then

sends them to the DTRU for demodulation.

l The DDPU also receives the DL signals from the DTRU, filters them, and then sends them

to the antenna for transmission.

4.7.3 Working Principles of the DDPU

This part describes the working principles of the DDPU. The DDPU consists of the DDLC,

duplexer, and power coupler.

Figure 4-12shows the working principles of the DDPU.

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Figure 4-12Working principles of the DDPU

DDLC

DDPU

DuplexerTX1

TX/RX ANTA

RX1A

RX2A

RX3A

RX4A

BUS

-48 V DC

DuplexerTX2

RX1B

RX2B

RX3B

RX4B

TX/RX ANTB

Power coupler

Power coupler

DDLC

It receives signals from the antenna, amplifies and quarters these signals, and then sends them

to the DTRU. It also features fault self-detection.

Duplexer

The duplexer consists of the receive filer and the transmit receiver. The duplexer filters the

received signals and the signals that are to be transmitted.

Power Coupler

It extracts signals for the DDLC to perform VSWR detecting.

4.7.4 LEDs and Ports on the DDPU

This part describes the LEDs and ports on the DDPU panel. The two LEDs on the DDPU panel

indicate the working status of the DDPU. There are 14 ports on the DDPU. These ports include

antenna ports, TX ports, RX ports, communication port, and power port.

Figure 4-13shows the DDPU panel.


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Figure 4-13DDPU panel

RUN

ALM

VSWRA

RXA1

RXA2

RXA3

RXA4

RXB1

RXB2

RXB3

RXB4

DDPU

TXA

TXB

COM

POWER

VSWRB

ANTA

ANTB

Table 4-19describes the LEDs on the DDPU panel.

Table 4-19LEDs on the DDPU panel


Status Meaning

RUN Green Indicates

the

working

status ofthe

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 sending configuration

parameters to the DDPU or the DDPU

is loading software programs.

ALM Red Alarm

indicator

On (flash at

high frequency)

Alarms (including VSWR alarm),

indicating that there are faults

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Status Meaning

Off No alarm

Slow flash (onfor 1s and off

for 1s)

The DDPM is starting or loading thelatest application.

VSWRA Red Channel

A VSWR

alarm

indicator

Slow flash (on

for 1s and off

for 1s)

Channel A VWSR alarm

On Critical channel A VSWR alarm

Off No channel A VSWR alarm

VSWRB Red Channel

B VSWRalarm

indicator

Slow flash (on

for 1s and offfor 1s)

Channel B VWSR alarm

On Critical channel B VSWR alarm

Off No channel B VSWR alarm

Table 4-20describes the ports on the DDPU panel.

Table 4-20Ports on the DDPU panel

Port Type Function

COM DB26 female connector Receives control signals, communication signals,

clock signals, and rack number signals from the

DCTB of the BTS3012

Receives control signals, communication signals,

and clock signals from the DSCB of the

BTS3012AE

POWER 3V3 power connector Power input

TXA N female connector l Receives TX signals from the DTRU

l Receives combination signals from the DCOM

TXB N female connector l Receives TX signals from the DTRU

l Receives combination signals from the DCOM

RXA1 SMA female connector Main output port for route 1




RXB1 SMA female connector Diversity output port for route 1


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Port Type Function




ANTA DIN female connector Connects to the indoor 1/2-inch jumper of the

BTS3012 or the BiasTee

Connects to the indoor 1/4-inch jumper of the

BTS3012AE or the BiasTee

ANTB DIN female connector Connects to the indoor 1/2-inch jumper of the

BTS3012 or the BiasTee

Connects to the indoor 1/4-inch jumper of the

BTS3012AE or the BiasTee

4.7.5 Specifications for the DDPU


DDPU.

Table 4-21describes the specifications for the DDPU.

Table 4-21Specifications for the DDPU

Item Specification

Dimension Dimension of the front panel (length x width): 383.6 mm x 70.6

mm


Power consumption

(heat consumption)


Weight 8.0 kg

4.8 DELUThe E1 Signal Lightning-Protection Card for DTRU BTS (DELU) is installed in the signal

lightning protection subrack. It is configured in slot 0 or 2 (from bottom to top) of the DSCB.

The DELU is mandatory. A maximum of two DELUs can be configured.

4.8.1 Functions of the DELU

One DELU can protect four channels of E1 signals from lightning strikes.

4.8.2 Port on the DELU

The DELU has only one port, used to transmit E1 lightning protection signals.

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4.8.1 Functions of the DELU

One DELU can protect four channels of E1 signals from lightning strikes.

The DELU performs the following functions:

l Protecting four channels of E1 signals from lightning strikes.

l Transmitting E1 signals to the DCCU, through which the signals are sent to the DTMU for

processing

4.8.2 Port on the DELU

The DELU has only one port, used to transmit E1 lightning protection signals.

Table 4-22describes the ports on the DELU.

Table 4-22Port on the DELU


TR DB25 female

connector

Transmitting E1 lightning protection signals

4.9 DFCB

The Filter Combiner Unit for DTRU BTS (DFCB) is located in the DAFU subrack of the RF

front-end subsystem. It is an optional module. The BTS3012/BTS3012AE can be configured

with the DDPU or the DFCU/DFCB.

4.9.1 Functions of the DFCB

This part describes the functions of the DFCB. The DFCB receives the UL signals from the

antenna, divides the signals, and then sends the signals to the DTRU. It also receives DL signals

from the DTRU, filters and amplifies the signals, and then sends the signals to the antenna. The

DFCB must be connected with the DFCU.

4.9.2 Working environment of the DFCB

This part describes the working environment of the DFCB.

4.9.3 Working Principles of the DFCB

This part describes the working principles of the DFCB. The DFCB consists of the cavities,

duplexer, diversity filter, lower noise amplifier (LNA), control unit, and directional coupler.

4.9.4 LEDs and Ports on the DFCB

This part describes the LEDs and ports on the DFCB panel. The four LEDs on the DFCB panel

indicates the working status of the DFCB and the 29 ports provide signals input and output.

4.9.5 Specifications for the DFCB


DFCB.

4.9.1 Functions of the DFCB

This part describes the functions of the DFCB. The DFCB receives the UL signals from theantenna, divides the signals, and then sends the signals to the DTRU. It also receives DL signals


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from the DTRU, filters and amplifies the signals, and then sends the signals to the antenna. The

DFCB must be connected with the DFCU.

The DFCB performs the following functions:

l

Combines one route or two routes of RF TX signals from the transmitter of the DTRU ,and then transmits them to the antenna through a duplexer

l Transmits the received signals from the antenna to the duplexer and LNA (The DFCU also

controls the gain of the amplifier), divides the signals into several routes, and then transmits

them to the receivers of the DTRUs

l Detects the VSWR alarms of the antenna system and provides the function of the VSWR

alarms whose thresholds are adjustable

4.9.2 Working environment of the DFCB

This part describes the working environment of the DFCB.

Figure 4-14shows the working environment of the DFCB.

Figure 4-14Working environment of the DFCB

DTRUDTRU DFCU TMA

DTRUDTRU DFCB TMA

l The DFCB receives the UL signals from the antenna, filters, amplifies, and divides thesignals, and then transmits them to the DTRU for demodulation.

l The DFCB receives the DL signals from the DTRU, filters and combines the signals, and

then sends them to the antenna for transmission.

l The DFCB combines two routes of RF signals and transmits them to the COM-IN port on

the DFCU panel so that the DFCU can combine six routes of RF signals for transmission.

4.9.3 Working Principles of the DFCB

This part describes the working principles of the DFCB. The DFCB consists of the cavities,

duplexer, diversity filter, lower noise amplifier (LNA), control unit, and directional coupler.

Figure 4-15shows the functional structure of the DFCB.

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Figure 4-15Functional structure of the DFCB

COM1TX1

TX2TX3

TX4

DuplexerTX/RX-ANT

TX-DUP

PF-out1PF-out2

PR-out2PR-out1

PR-in1PR-in2

PF-in1

PF-in2

DC-IN -48V

DBUS

HL-OUT

RX2

RX3

RX1

DFCB

Jumper

COM2

Directional

coupler

LNA

Cavity

CavityCavity

Cavity

Control unit

Duplexer

The duplexer consists of a RX filter and a TX filter. The duplexer provides a reliable channel

for both RX signals and TX signals sharing one antenna. This ensures that the strong TX signals

do not affect the weak RX signals.

Cavity

It provides dual two-in-one mechanism to be cascaded with the DFCU.

LNA

The LNA is used to amplify the RX signals from the antenna. The LNA gain is adjustable through

the commands issued by the BTS. The LNA features self-detection through which an alarm is

reported when a fault occurs.

Control Unit

The control unit is used to control the combiners, detect the VSWR alarms, set the signal gain

of the LNA, detect the LNA alarm, and set up the communication between the DFCU and the

BTS.

Directional Coupler

The directional coupler features VSWR detection. The VSWR testing circuit checks the forward/

reverse DL power through the standing-wave detector. The output voltage from the standing-

wave detector are processed and calculated. If the VSWR exceeds a specified threshold, theVSWR alarm is reported.


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4.9.4 LEDs and Ports on the DFCB

This part describes the LEDs and ports on the DFCB panel. The four LEDs on the DFCB panel

indicates the working status of the DFCB and the 29 ports provide signals input and output.

Panel

Figure 4-16shows the DFCB panel.

Figure 4-16DFCB panel

TX1

PF in1TUNING

VSWR

LNA

RUN

PF in2

PF out1

PF out2

PR out1

PR out2

RX6

RX5

RX4

HL-IN

RXD-OUT

HL-OUTCOM2

DBUS

RX3

RX2

RX1

TX3

PR in1

DC-IN-48V PR in2

TX4TX-DUP

EGSM900 DFCB

COM1

RXD-ANT

TX/RX-ANT

LED

Table 4-23describes the LEDs on the DFCB panel.

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Port Type Function

TX2 N female connector DTRU signal input port 2



RX1 SMA female connector Main DTRU signal output port 1



RX4 SMA female connector Diversity DTRU signal output port 1



HL-OUT SMA female connector High level output port

HL-IN SMA female connector High level input port

RXD-ANT SMA female connector Diversity receive output port

PR out1 SMA female connector Reverse power sampling output port 1


PF out1 SMA female connector Forward power sampling output port 1


PR in1 SMA female connector Reverse power sampling input port 1


PF in1 SMA female connector Forward power sampling input port 1


4.9.5 Specifications for the DFCB


DFCB.

Table 4-25describes the specifications for the DFCB.

Table 4-25Specifications for the DFCB

Item Specification

Dimension Dimension of the front panel (length x width): 396 mm x 142

mm


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Item Specification

Power consumption (heat

consumption)


Weight 20 kg

4.10 DFCU

The Filter Combiner Unit for DTRU BTS (DFCU) is located in the DAFU subrack of the RF

front-end subsystem. The DFCU is optional. The BTS3012/BTS3012AE can be configured with

the DDPU or the DFCU.

4.10.1 Functions of the DFCU

This part describes the functions of the DFCU.

4.10.2 Working Environment of the DFCU

This part describes the working environment of the DFCU.

4.10.3 Working Principles of the DFCU

This part describes the working principles of the DFCU. The DFCU consists of the cavity

combiner, micro-band combiner, duplexer, diversity filter, lower noise amplifier (LNA), control

unit, and directional coupler.

4.10.4 LEDs and Ports on the DFCU

This part describes the LEDs and ports on the DFCU panel. The four LEDs on the DFCU panel

indicates the working status of the DFCU and the 29 ports provide signals input and output.

4.10.5 Specifications for the DFCU

This part describes the dimensions, working voltage, power consumption, and weight of theDFCU.

4.10.1 Functions of the DFCU

This part describes the functions of the DFCU.

The DFCU performs the following functions:

l Transmits multiple routes of RF TX signals from the DTRU transmitter to the antenna

through the duplexer after combination

l Transmits the received signals from the antenna to the duplexer and to the low noise

amplifier (The DFCU also controls the gain of the amplifier), divides the signals into severalroutes, and transmits them to the receivers of the DTRUs

l Provides four-in-one signal combination or six-in-one signal combination once connected

with the DFCB

l Detects the frequencies of the input signals and performs automatic tuning

l Detects the VSWR alarms of the antenna system and provides the function of the VSWR

alarms whose thresholds are adjustable

4.10.2 Working Environment of the DFCU

This part describes the working environment of the DFCU.

Figure 4-17shows the working environment of the DFCU.


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Figure 4-17Working environment of the DFCU

DTRUDTRU DFCU TMA

DTRUDTRU DFCB TMA

l The DFCU receives the UL signals from the antenna, filters, amplifies, and divides the

signals, and then transmits them to the DTRU for demodulation.

l The DFCU receives the DL signals from the DTRU, filters and combines the signals, and

then transmits them to the antenna for transmission.

l The DFCU receives the combined signals from the DFCB, filters the signals, and then

transmits them to the antenna for transmission.

4.10.3 Working Principles of the DFCU

This part describes the working principles of the DFCU. The DFCU consists of the cavity

combiner, micro-band combiner, duplexer, diversity filter, lower noise amplifier (LNA), control

unit, and directional coupler.

Figure 4-18shows the functional structure of the DFCU.

Figure 4-18Functional structure of the DFCU

COM-INTX1

TX2

TX3

TX4

TX/RX-ANT

TX-COM

TX-DUPPF-out1PF-out2

Directional

coupler

Cavity

PR-out2PR-out1

Control unit

PR-in1

PR-in2

PF-in1

PF-in2

DC-IN -48V

DBUS

Diversity filterRXD-ANT

HL-OUT

RX4

RX2RX3

RXD-OUT

LNA

LNA

RX5RX6

HL-IN

RX1

DFCU

Jumper

Cavity

Cavity

Cavity

Micro-band

combiner

Duplexer

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Duplexer

The duplexer consists of a RX filter and a TX filter. The duplexer provides a reliable channel

for both RX signals and TX signals sharing one antenna. This ensures that the strong TX signals

do not affect the weak RX signals.

Cavity

The four cavities combine four routes of signals into two routes, and then transmit the signals

to the micro-band combiner.

Micro-Band Combiner

The micro-band combiner is used to combine two routes of signals from the cavities into one

route for transmission.

LNA

The LNA is used to amplify the RX signals from the antenna. The LNA gain is adjustable through

the commands issued by the BTS. The LNA features self-detection through which an alarm is

reported when a fault occurs.

Diversity Filter

The diversity filter is used to filter the signals from the diversity ports.

Control Unit

The control unit is used to control the combiners, detect the VSWR alarms, set the signal gain

of the LNA, detect the LNA alarm, and set up the communication between the DFCU and the

BTS.

Directional Coupler

The directional coupler features VSWR detection. The VSWR testing circuit checks the forward/

reverse DL power through the standing-wave detector. The output voltage from the standing-

wave detector are processed and calculated. If the VSWR exceeds a specified threshold, the

VSWR alarm is reported.

4.10.4 LEDs and Ports on the DFCU

This part describes the LEDs and ports on the DFCU panel. The four LEDs on the DFCU panel

indicates the working status of the DFCU and the 29 ports provide signals input and output.

Panel

Figure 4-19shows the DFCU panel.


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Figure 4-19DFCU panel

RXD-ANT

TX/RX-ANT

LED

Table 4-26describes the LEDs on the DFCU panel.

Table 4-26LEDs on the DFCU panel

LED Color Remarks Status Meaning

RUN Green Power indicator On There is power

input.

Off There is no power

input.

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LED Color Remarks Status Meaning

VSWR Red VSWR alarm

indicator of TX/

RX_ANT

On There is a level 2

VSWR alarm.

Slow flash (on for1s and off for 1s)

There is a level 1VSWR alarm.

Off There is no VSWR

alarm.

LNA Red LNA alarm

indicator

On There is an LNA

alarm.

Off There is no alarm.

TUNING Red Tuning fail alarm

indicator

On There is a tuning

failure alarm.

Slow flash (on for

1s and off for 1s)

Tuning

Off There is no alarm.

Port

Table 4-27describes the ports on the DFCU panel.

Table 4-27Ports on the DFCU panel

Port Type Remarks

TX/RX-ANT 7/16 DIN female

connector

Antenna port for reception and

transmission

RXD-ANT 7/16 DIN female

connector

Diversity receive antenna port

DBUS DB26 female connector DBUS signal input and output port

DC-IN 48 V 3V3 power connector DC power input port

TX-COM N female connector Combining output port

TX-DUP N female connector Duplexer input port

COM-IN N female connector Extended combining port 2







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Port Type Remarks






HL-OUT SMA female connector High level output port

HL-IN SMA female connector High level input port

RXD-ANT SMA female connector Diversity receive output port









NOTE

The circuit connected to the COM-IN port is an open circuit. When the DFCU is used independently, the

open circuit connects with the RF signal cable, which connects the PR in1 port with the PR out1 port. These

two ports are connected before delivery.

4.10.5 Specifications for the DFCU


DFCU.

Table 4-28describes the specifications for the DFCU.

Table 4-28Specifications for the DFCU

Item Specification

Dimension Dimension of the front panel (length x width): 396 mm x 142

mm


Power consumption (heat

consumption)


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Item Specification

Weight 20 kg

4.11 DGLU

The Combined Group Signal Lightning-Protection Unit for DTRU (DGLU) is installed in the

signal lightning protection subrack. The DGLU is optional. Only one DGLU can be configured.

4.11.1 Functions of the DGLU

The DGLU protects the clock signals between BTS3012AE cabinet groups from lightning strikes

when the distance between the cabinet groups is 25 meters.

4.11.2 Port on the DGLU

The DGLU has one CKB port, used to connect the clock cable between cabinet groups.

4.11.1 Functions of the DGLU

The DGLU protects the clock signals between BTS3012AE cabinet groups from lightning strikes

when the distance between the cabinet groups is 25 meters.

The DGLU is optional. When the distance between the cabinet groups is 25 meters, the DGLU

is required.

Only one DGLU can be configured. The configuration modes of the DGLU are as follows:

l The DGLU in the main cabinet group is configured in slot 2 on the DSCB.

l The DGLU in the extension cabinet group is configured in slot 1 on the DSCB.

4.11.2 Port on the DGLU

The DGLU has one CKB port, used to connect the clock cable between cabinet groups.

Figure 4-20shows the panel of the DGLU.

Figure 4-20Panel of the DGLU

DGLU

CKB

Table 4-29lists the port on the panel of the DGLU.

Table 4-29Port on the panel of the DGLU


CKB DB25 female connector Connecting the clock cable

between cabinet groups


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4.12 DMLU

The Monitor signal Lightning-protection Unit for DTRU BTS (DMLU) is installed in slot 1 on

the DSCB in the signal lightning protection subrack. The DMLU is optional. Only one DMLU

can be configured.

4.12.1 Functions of the DMLU

The DMLU protects the Boolean inputs from lightning strikes and provides a serial bus port.

4.12.2 Ports on the DMLU

The DMLU has two ports: the port SW IN/OUT is used to introduce Boolean value signals and

relay signals, and the port EAC is used to connect the external environment alarm box and

transmit signals.

4.12.1 Functions of the DMLUThe DMLU protects the Boolean inputs from lightning strikes and provides a serial bus port.

The DMLU performs the following functions:

l Protecting the eight external Boolean inputs from lightning strikes

l Providing a 2-route 485 serial bus port.

4.12.2 Ports on the DMLU

The DMLU has two ports: the port SW IN/OUT is used to introduce Boolean value signals and

relay signals, and the port EAC is used to connect the external environment alarm box andtransmit signals.

Figure 4-21shows the panel of the DMLU.

Figure 4-21Panel of the DMLU

DMLU

SW IN/OUT EAC

Table 4-30lists the ports on the panel of the DMLU.

Table 4-30Ports on the panel of the DMLU

Silk-Screen Type Description

SW IN/OUT DB44 female

connector

Eight Boolean value inputs

Two relay signal inputs

2-route 485 serial bus port

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EAC DB9 female

connector

Connecting the external environment alarm box and

transmitting signals

4.13 DSCB

The Cabinet Signal Connection Backboard (DSCB) is installed in the lightning protection

subrack. It has three slots. Slot 0 holds only the DELU. Slot 1 holds the DGLU or the DMLU.

Slots 2 holds the DGLU or the DELU.

4.13.1 Functions of the DSCB

The DSCB transfers the signals between the common subrack and other BTS devices. The signals

include clock signals, control signals, data signals, and Boolean value alarm signals.

4.13.2 Ports on the DSCBThe DSCB has 11 ports, connecting to the connectors for the signal cables of boards and the

connectors for the signal cables between combined cabinets and between cabinet groups.

4.13.1 Functions of the DSCB

The DSCB transfers the signals between the common subrack and other BTS devices. The signals


The DSCB performs the following functions:

l Transferring signals between combined cabinets and between cabinet groups. The signals


l Providing the control signals and clock signals for the DDPU or the DFCU

l Transferring the E1 signals from the transmission equipment to the DCCU.

l Transferring the environment monitoring signals to the NPMI

4.13.2 Ports on the DSCB

The DSCB has 11 ports, connecting to the connectors for the signal cables of boards and the

connectors for the signal cables between combined cabinets and between cabinet groups.

Figure 4-22shows the panel of the DSCB.

Figure 4-22Panel of the DSCB

TOS

LAVEMASTER

(FROMD

CSU)

TOP(FROMD

CCU)

TOD

CCU

E1

TOD

CSU

TOP

TO3

GE

1

TOD

AFU

0-2

TOD

AFU

3-5

TOS

LAVECABINET

TOS

LAVEGROUP1

TOS

LAVEGROUP2

TO

NPMI

DMLU/DGLU

DELU 0

DELU 1/DGLU

Table 4-31lists the ports on the panel of the DSCB.


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Table 4-31Ports on the panel of the DSCB


TO SLAVE

MASTER(FROM DCSU)

MD68 female connector Connector for the cable to the

DCSU

TOP (FROM

DCCU)

MD68 female connector Connector for the cable to the

DCCU

TO DCCU E1 MD36 female connector Connector for the E1 cable from

the DCCU

TO NPMI MD36 female connector Connector for the RS485

environment monitoring cable

to the NPMI

TO DCSU TOP MD36 female connector Connector for the cable to theDCSU

TO 3G E1 MD36 female connector Connector for the 3G E1 cable,

reserved

TO DAFU 0-2 MD68 female connector Connector for the cable to

DDPU 0DDPU 2

TO DAFU 3-5 MD68 female connector Connector for the cable to

DDPU3DDPU 5

TO SLAVE

CABINET

MD36 female connector Connector for the signal cable

between combined cabinets

TO SLAVE

GROUP1

MD36 female connector Close connector for signal cable


TO SLAVE

GROUP2

MD36 female connector Close connector for signal cable


Table 4-32lists the slots on the DSCB.

Table 4-32Slots on the DSCB

Slot Number Board Description

Slot 0 DELU Slot 0 is configured with only the

DELU.

Slot 1 DGLU Slot 1 on the DSCB in the

extension cabinet group is

configured with the DGLU when

the distance between the cabinet

groups is 25 meters.

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Slot Number Board Description

DMLU In the conditions except that

described above, slot 1 on the

DSCB is configured with the

DMLU.

Slot 2 DGLU Slot 2 on the DSCB in the main

cabinet group is configured with

the DGLU when the distance

between the cabinet groups is 2

5 meters.

DELU In the conditions except that

described above, slot 2 is

configured with the DELU.

4.14 DTMU

The Transmission/Timing/Management Unit for DTRU BTS (DTMU) is an entity for basic

transmission and control in the BTS3012. It works as a main controller. The DTMU is a

mandatory module. It is installed in slots 1 and 2 of the common subrack.

4.14.1 Functions of the DTMU

This part describes the functions of the DTMU. The DTMU provides multiple ports to receive

clock signals,power supply, maintenance signals, and external alarm signals. It controls and

manages the entire BTS.

4.14.2 Working Environment of the DTMU

This part describes the working environment of the DTMU. The DTMU is placed in the common

subsystem ofthe BTS. It processes the data signals from the DELC or the optical transmission

equipment, and then transmits the data signals, clock signals, and control signals to the entire

BTS through the buses in the BTS.

4.14.3 Working Principles of the DTMU

This part describes the working principles of the DTMU. The DTMU consists of the BIU, MCU,

and MCK.

4.14.4 LEDs and Ports on the DTMU

This part describes the LEDs and ports on the DTMU panel. The nine ports on the DTMU panel

indicate the working status of the DTMU. Three ports on the DTMU panel provide clockreference for the BTS, whereas the other port provides access for the maintenance equipment.

4.14.5 DIP Switches on the DTMU

This part describes the DIP switches on the DTMU. There are five DIP switches on the DTMU.

Four switches, namely, S4, S5, S6, and S7, specify the grounding for eight E1 routes. The other

switch, S3, is reserved.

4.14.6 Specifications for the DTMU


DTMU.


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4.14.1 Functions of the DTMU

This part describes the functions of the DTMU. The DTMU provides multiple ports to receive

clock signals, power supply, maintenance signals, and external alarm signals. It controls and

manages the entire BTS.The DTMU performs the following functions:

l Provides external GPS inputs

l Provides BITS synchronized clock inputs

l Provides backup between the active and standby boards

l Provides a 10 Mbit/s network port for terminal maintenance

l Supports four routes of E1 inputs or eight routes of E1 inputs if required

l Controls, maintains, and operates the BTS

l Downloads software for the BTS

l Provides fault management, configuration management, performance management, and

security management

l Manages the clock access and provides hot backup for the clock units

l Provides backup for the E1 ports and the main control unit

l Supports eight routes of digital alarm inputs, two of them being lightning arrester failure

alarm inputs

l Supports four routes of extended digital control signal outputs

l Monitors the external fan control board and the power modules

4.14.2 Working Environment of the DTMUThis part describes the working environment of the DTMU. The DTMU is placed in the common

subsystem of the BTS. It processes the data signals from the DELC or the optical transmission

equipment, and then transmits the data signals, clock signals, and control signals to the entire

BTS through the buses in the BTS.

Figure 4-23shows the working environment of the DTMU.

Figure 4-23Working Environment of the DTMU

Common subsytem

TBUS

DBUS

E1CBUS

Monitor BITS

E1

Optical

transmission equipment

DELC

DSAC DTMU

DTMU

Monitor BITS

Optical cable

DBUS/TBUS/VBUS

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NOTE

The configuration of the DELC in Figure 4-23shows that this is a BTS3012 cabinet. The BTS3012AE

uses the DELU instead of the DELC.

The working environment of the DTMU is as follows:

l The DTMU processes the data signals from the DELC or the optical transmission

equipment, and then transmits the signals to the DCSU through the data bus.

l The DTMU provides the entire with clock signals and control signals through the buses in

the BTS.

l The DTMU processes the lightning protection failure signals and BITS clock signals

reported by the DSAC.

4.14.3 Working Principles of the DTMU

This part describes the working principles of the DTMU. The DTMU consists of the BIU, MCU,

and MCK.

Figure 4-24shows the working principles of the DTMU.

Figure 4-24Working Principles of the DTMU

MCU

DTMU

BIU

MCK

DTRU

CBUS2

DBUSBSC

LMT MMI

Abis

Subrack number

and clock

External

synchronized clock

OML

Clock

BIU

l Connects the BTS with the BSC

l Provides four or eight routes of E1 backup between the active and the standby DTMUs

l Exchanges timeslot data between the E1 links and the DBUS

l Synchronizes the lower-level clock with the upper-level clock

MCU

l Supports multiple communication protocols such as UART and HDLC

l Controls the BIU to enable the communications between the BSC and the BTS


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l Provides a platform for the MCK software

MCK

l

Provides high-precision clock reference and system clock for the BTSl Judges the status of the phase-lock, provides software phase-lock and DA adjustment, and

generates the frame numbers

l Transmits clock signals and synchronization signals between the active and the standby

DTMUs

4.14.4 LEDs and Ports on the DTMU

This part describes the LEDs and ports on the DTMU panel. The nine ports on the DTMU panel

indicate the working status of the DTMU. Three ports on the DTMU panel provide clock

reference for the BTS, whereas the other port provides access for the maintenance equipment.

Panel

Figure 4-25shows the DTMU panel.

Figure 4-25DTMU panel

RUN

ACT

PLL

LIU1

LIU2

LIU3

LIU4

SWT

ALM

RST

MMI

T2M

FCLK

T13M

DTMU

LEDs

Table 4-33describes the LEDs on the DTMU panel.

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Table 4-33LEDs on the DTMU panel


Status Meaning

RUN Green Indicates theworking

status of the

board

Slow flash (on for2s and off for 2s)

The OML is blocked.

Slow flash (on for

1s and off for 1s)

Normal

Fast flash at

irregular intervals

The BSC is loading data.

Off There is no power input for the

board.

ACT Green Indicates

whether theboard is

active or

standby

Off Standby board

On Active board

PLL Green Indicates the

clock status

Off The status of the clock is

abnormal.

On Free-run

Fast flash (on for

0.125s and off for

0.125s)

Pull-in

Fast flash (on for

0.5s and off for

0.5s)

Locked

LIU1 Green Indicates the

transmission

status of E1

port 1 and

port 5

Off E1 port 1 is normal when SWT

is off.

E1 port 5 is normal when SWT

is on.

On E1 port 1 near end alarm occurs

when SWT is off.

E1 port 5 near end alarm occurs

when SWT is on.

Fast flash (on for

0.125s and off for

0.125s)

E1 port 1 remote end alarm

occurs when SWT is off.


occurs when SWT is on.


transmission

status of E1


is off.


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Status Meaning

port 2 and

port 6


is on.


when SWT is off.


when SWT is on.

Fast flash (on for

0.125s and off for

0.125s)





LIU3 Green Indicates thetransmission

status of E1

port 3 and

port 7

Off E1 port 3 is normal when SWTis off.


is on.


when SWT is off.


when SWT is on.

Fast flash (on for

0.125s and off for0.125s)






transmission

status of E1

port 4 and

port 8


is off.


is on.


when SWT is off.


when SWT is on.

Fast flash (on for

0.125s and off for

0.125s)





SWT Green Indicates the

transmission

status of E1

links

When the DTMU

supports eight E1

routes, the SWT

status is slow flash

When the SWT is off, LIU1 to

LIU4 indicate the transmission

status of E1 port 1 to 4.

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Status Meaning

(on for 10s and off

for 10s).

When the SWT is on, LIU1 to

LIU4 indicate the transmission

status of E1 port 5 to 8.

When the DTMU

supports four E1

routes, the SWT

LED is always off.

LIU1 to LIU4 indicate the

transmission status of E1 port 1

to 4.

ALM Red Alarm LED Off No board alarm

On An alarm is generated.

NOTE

In the case that only one of the eight E1 routes supported by the DTMU is used for transmission, when

SWT is off, LIU1 is off and LIU2 to LIU4 are on; when SWT is on, LIU1 to LIU4 are on. If you only view

LIU1, you will find that LIU1 is on for 10s then off for 10s.

Ports

Table 4-34describes the ports on the DTMU panel.

Table 4-34Ports on the DTMU panel

Port Type Function

T2M SMA female connector Exports testing clock reference

FCLK SMA female connector 216.7 Hz frame clock

T13M SMA female connector 13 MHz primary clock reference

MMI RJ45 Terminal maintenance port

4.14.5 DIP Switches on the DTMU

This part describes the DIP switches on the DTMU. There are five DIP switches on the DTMU.

Four switches, namely, S4, S5, S6, and S7, specify the grounding for eight E1 routes. The otherswitch, S3, is reserved.

Figure 4-26shows the layout of the DIP switches on the DTMU and their factory settings.


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Figure 4-26Layout of the DIP switches on the DTMU

ON OFF

S4 4

1

4

S6 4

1

S7 4

1

S3 4

1

S51

The DIP switches on the DTMU specify the grounding of eight E1 routes. Table 4-35describes

the settings of the DIP switches.

Table 4-35Settings of DIP switches on the DTMU

DIP Switch DIP Bit ON/OFF Description

S5 1 ON Ring of the first TX E1 route is grounded.

OFF Ring of the first TX E1 route is not

grounded.

2 ON Ring of the first RX E1 route is grounded.

OFF Ring of the first RX E1 route is not

grounded.

3 ON Ring of the second TX E1 route is grounded.

OFF Ring of the second TX E1 route is not

grounded.

4 ON Ring of the second RX E1 route is grounded.

OFF Ring of the second RX E1 route is not

grounded.

S4 1 ON Ring of the third TX E1 route is grounded.

OFF Ring of the third TX E1 route is not

grounded.

2 ON Ring of the third RX E1 route is grounded.

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DIP Switch DIP Bit ON/OFF Description

OFF Ring of the third RX E1 route is not

grounded.

3 ON Ring of the fourth TX E1 route is grounded.

OFF Ring of the fourth TX E1 route is not

grounded.

4 ON Ring of the fourth RX E1 route is grounded.

OFF Ring of the fourth RX E1 route is not

grounded.

S7 1 ON Ring of the fifth TX E1 route is grounded.

OFF Ring of the fifth TX E1 route is not

grounded.

2 ON Ring of the fifth RX E1 route is grounded.

OFF Ring of the fifth RX E1 route is not

grounded.

3 ON Ring of the sixth TX E1 route is grounded.

OFF Ring of the sixth TX E1 route is not

grounded.

4 ON Ring of the sixth RX E1 route is grounded.

OFF Ring of the sixth RX E1 route is notgrounded.

S6 1 ON Ring of the seventh TX E1 route is

grounded.

OFF Ring of the seventh TX E1 route is not

grounded.

2 ON Ring of the seventh RX E1 route is

grounded.

OFF Ring of the seventh RX E1 route is not

grounded.

3 ON Ring of the eighth TX E1 route is grounded.

OFF Ring of the eighth TX E1 route is not

grounded.

4 ON Ring of the eighth RX E1 route is grounded.

OFF Ring of the eighth RX E1 route is not

grounded.


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NOTE

Adhere to the following principles to set the DIP switches on the DTMU:

l Set all the DIP switches to ON when the 75-ohm E1 cable is used by the BTS.

l

Set all the DIP switches to OFF when the 120-ohm E1 cable is used by the BTS.

4.14.6 Specifications for the DTMU


DTMU.

Table 4-36describes the specifications for the DTMU.

Table 4-36Specifications for the DTMU

Item Specification

Dimension Dimension of the PCB (length width height): 280.0 mm 233.4 mm

2.0 mm

Dimension of the front panel (length width): 261.0 mm 30.5 mm


Power

consumption (heat

consumption)


Weight 1.2 kg

4.15 DTRB

The Double-Transceiver Unit Backplane (DTRB) is placed in the DTRU subrack. The DTRB

provides six slots to house the DTRUs.

4.15.1 Functions of the DTRB

This part describes the functions of the DTRB. The DTRB connects the DCSU with the DTRU.

4.15.2 Working Principles of the DTRB

This part describes the working principles of the DTRB. The DTRB uses the bus structure to

implem

01-04 boards and modules of the bts3012ae

Documents