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2 BTS3012 CabinetAbout This Chapter

The BTS3012 cabinet consists of the common subrack, DAFU subrack, DTRU subrack, FAN

subrack, transmission subrack, and set-on-top subrack. The BTS3012 cabinet, featuring a

modular structure, is designed in compliance with the IEC297 standard. It processes the signals

within the BTS.

2.1 Physical Structure of the BTS3012

The BTS3012 has the following components: BTS3012 cabinet, antenna system, and Operation

and Maintenance (OM) equipment.

2.2 Cable Distribution of the BTS3012

This part describes the cable distribution of the BTS3012. It consists of the cable distribution

on the cabinet front and the cable distribution on the cabinet top. The cable distribution on the

cabinet front is classified into the cable distribution when the DDPU is configured and the cable

distribution when the DFCU is configured.

2.3 Engineering Specifications for the BTS3012

The BTS3012 engineering specifications are concerned with dimensions, weight, power supply,

and power consumption of the BTS3012.

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2.1 Physical Structure of the BTS3012

The BTS3012 has the following components: BTS3012 cabinet, antenna system, and Operation

and Maintenance (OM) equipment.

Physical Structure of the BTS3012 Cabinet

The BTS3012 cabinet has the following components: DAFU subrack, DTRU subrack, fan

subrack, common subrack, top subrack, transmission subrack, and power supply unit.

Figure 2-1 shows a fully configured BTS3012 under S4/4/4 cell configuration.

Figure 2-1 Fully configured BTS3012 cabinet

Wiring & Air Inlet

Wiring

DDPU

DDPU

DDPU

DTRU

DTRU

DTRU

DTRU

DTRU

DTRU

Wiring

FAN

Air Inlet

Transmission UnitTransmission Unit

D

TMU

D

TMU

D

EMU

D

CCU

D

CSU

D

ATU

Powerand EMC

9U

7

1U

1U

9U

2U

1U

1U

6U

1U

2U

5

4

3

2

1

1

6

B

u

s

b

a

r

(1) Transmission subrack (2) Common subrack (3) FAN subrack

(4) DTRU subrack (5) DAFU subrack (6) Power supply unit

(7) Cabinet top subrack

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l DAFU Subrack

The DAFU subrack can be configured with DDPU, DCOM, DFCU, orDFCB.

For details about the DAFU subrack, refer to BTS3012 RF Front-End Subsystem.

l DTRU Subrack

One DTRU subrack supports up to six DTRUs.

For details about the DTRU subrack, refer to BTS3012 Double-Transceiver Subsystem.

l FAN Subrack

The FAN subrack has only one FAN box inside it. The FAN box contains one fan

monitoring board and four fans. The fan monitoring board detects the temperature at the

air inlets at the bottom of the cabinet, and adjusts the speed and working status of the fans.

For details about the fan subrack, refer to Fan Box.

l Common Subrack

The common subrack is below the fan subrack. It is configured with the following parts:

DTMU

DEMU

DATU

DCSU

DCCU

For details about the common subrack, refer to BTS3012 Common Subsystem.

l Cabinet Top Subrack

The cabinet top subrack is located at the top of the BTS3012 cabinet. It is configured with

the following parts:

DMLC

DELC

DSAC

For details about the cabinet top subrack, refer to BTS3012 Signal Protection

Subsystem.

l Power Supply Unit

The power supply unit consists of the DC lightning arrester, EMI filter, PGND bar, busbar

terminal socket on top of the cabinet, and the Busbar in the right of the cabinet.

For details about the power supply unit, refer to BTS3012 Power Subsystem.

l Transmission Subrack

The transmission subrackis below the common subrack. The transmission subrack reserves

space for installing the Baseband Unit (BBU). The SDH and microwave transmission

equipment can be installed in the transmission subrack

Physical Structure of the Antenna System

For details about the antenna system, refer to Antenna Subsystem of the BTS.

Physical Structure of the Equipment

For details about the equipment, refer to OM of the BTS.

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2.2 Cable Distribution of the BTS3012

This part describes the cable distribution of the BTS3012. It consists of the cable distributionon the cabinet front and the cable distribution on the cabinet top. The cable distribution on the

cabinet front is classified into the cable distribution when the DDPU is configured and the cable

distribution when the DFCU is configured.

Cable Distribution on the Cabinet Front

Figure 2-2 shows the cable distribution on the cabinet front when the DDPU is configured.

Figure 2-2 Cable distribution on the cabinet front (configured with the DDPU)

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NOTE

l The RF signal cables between the DTRU and DDPU shown in Figure 2-2 are connected based on the

S4/4/4 cell configuration.

l Normally, the DCOM is not configured in S4/4/4 cell configuration. The DCOM is, however, illustrated

in Figure 2-2 for easy description of the cable connections between the DCTB and the DAFU subrack.

l The seven signal cables shown in Figure 2-2, namely, S10-S13 and S15-S17, are connected to the

cabinet top.

Figure 2-3 shows the cable distribution on the cabinet front when the DFCU is configured.

Figure 2-3 Cable distribution on the cabinet front (configured with the DFCU)

P11

S14

S13.6

S13.4

S13.3

S13.5

P

13

P9

P7

P8

P12

P14

To cabinet top :

FAN

DEMU

DTRU DTRU DTRU DTRU

P2P1

BGND

P6P6

P9

P10P11P12

DTRUDTRU

R1

-48V

R8

R3

R4

R9R10

R32

S18

R7

P14

S9

S10

S10

S11

S11

S12.2S12.1 S12.3

S12

DCCU

Signal cable Power cable RF cable

S12

S9

S13.1

S13.2

DATU

R2

DTRB

DCSU

S

14

S13

S16

S16

S17

S17.1

S1

7.2

P15

BBU/

Transmission

subrack

P15

P10

P13

P15P15

S15

S15

P7P8

DFCU DFCU DFCU

S19

R31

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NOTE

The RF signal cables between the DTRU and DFCU shown in Figure 2-3 are connected based on S4/4/4

cell configuration. As there are many numbers of cables, for easy recognition, connections of only the RF

TX cables are provided in sector 1 and connections of only the power detection cables are provided in

sector 2. The RF signal cables and the power detection cables belonging to one sector should be connected.

Internal cable distribution on the cabinet top

Figure 2-4 shows the internal cable distribution on the cabinet top.

Figure 2-4 Internal cable distribution on the cabinet top

P4

P5

P1

P2

S4

GND

-48V

-48V

GND

GND

-48V

-48V

S5.1S5.2

S2.1

S2.2

S1

S6

S7

S8

V-

V+

GND

GND

P4

P5

P3

S4

BiasTee

BiasTee

BiasTee

BiasTee

BiasTee

BiasTee

S13.1

S13.2

S13.3

S13.4

S13.5

S13

GND

P2

P3

-48V

S3

S3

S13.6

Signal cable Power cable

S20

P16

P17

External connection

of the power cables

Cable distribution in the cabinet

Table 2-1 describes the cable distribution in the cabinet.

Table 2-1 Cable distribution in the cabinet

Cable No. Cable Quantity

R1R6 RF TX cable 6

R7R18 RF RX cable 12

R19R30 Combining short-circuiting signalcable 12

R31 Four-in-one short-circuiting signal

cable

3

R32 Diversity receive short-circuiting

cable

3

S1 Signal cable for combined cabinets 1

S2 Signal cable for cabinet groups 2

S3 Signal cable for the environment

monitoring device

1

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Cable No. Cable Quantity

S4 Lightning protection failure alarm

cable on the cabinet top

1

S5 E1 cable 2

S6 Boolean input signal cable 1

S7 Boolean value output cable 1

S8 Dedicated monitoring signal cable 1

S9 FAN subrack signal transfer cable 1

S10 E1 signal transfer cable 1

S11 Boolean value signal transfer cable 1

S12 Signal cable between the DCTB and

the DAFU subrack

2

S13 RET control signal cable 6

S14 Signal cable between the DCSU and

the DTRB

1

S16/S15 Signal transfer cable for combined

cabinets

1

S17 TOP signal cable between the DCCU/

DSCU and the DCTB

1

S18-S19 Power detection cable 6

S20 EAC signal cable 1

P1P2 Power cable 1

P3 PGND cables 1

P4P5 Power cable 1

P6P15 Busbar power cable

P16P17 Power cable 2

NOTE

Use the combination mode in the DFCU first when the cabinet using the DFCU is configured in S4/4/4

cell configuration. The combination mode in the DTRU is not used. Therefore, the combining short-

circuiting cables (R19-R30) are not required.

2.3 Engineering Specifications for the BTS3012

The BTS3012 engineering specifications are concerned with dimensions, weight, power supply,

and power consumption of the BTS3012.

BTS3012

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Dimensions

Table 2-2 Dimensions (appearance)

Item Width (mm) Depth (mm) Height (mm)Cabinet 600 450 1600

Cabinet+top subrack 600 450 1680

Cabinet+top subrack+base 600 450 1750

Weight

Table 2-3 Weight of the cabinet

Configuration Type Weight of the Cabinet (Kg)

Empty cabinet (including the boards in the common

subrack)

120

Full configuration (S4/4/4) 200

Full configuration (S4/4/4 cell configuration

including the transmission modules and the

DCOMs)

220

Power Supply

The BTS3012 uses the 48 V DC that complies with the specification ETS 300 132-2. Table

2-4 lists specifications for the input power.

Table 2-4 Specifications for the input power

Power Type Rated Value Specifications

-48 V DC -48 V DC -40 V DC to -60 V DC

NOTE

The BTS3012 cabinet supports 110 V AC, 220 V AC, and +24 V DC through an external power subrack.

Power Consumption

Table 2-5 lists the typical power consumption value of the BTS3012 when the DTRU (type A)

is used.

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Table 2-5 Power consumption

Parameter Configuration Type PowerConsumption

Mean value Normal temperature, 900 MHz 40 W TRX,S4/4/4 full configuration, DC power

consumption in mean traffic volume (48 V DC

used)

1.6 kW

Table 2-6 lists the typical power consumption value of the BTS3012 when the DTRU (type B)

is used.

Table 2-6 Power consumption

Parameter Configuration Type Power

Consumption

Mean value Normal temperature, 900 MHz 40 W TRX,

S4/4/4 full configuration, DC power

consumption in mean traffic volume (48 V DC

used)

0.95 kW

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