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Functions of DTRU

RF subsystem transmit part. Converts the basband signals on the two TR

Xs to the RF signals. Supports up-frequency conversion of the signals and

RF frequency hopping.Filters, amplifies, and outputs the combined signals

RF subsystem receive part.Devides and modulates the RF signals on the

two TRXs.Supports transmit receive and RF frequency hopping

Baseband processing part.Processes signals.Supports coding and decodi

ng, interleaving and de-interleaving, modulation and demodulation.Suppor

ts voice fax services.Supports data services in Phase II, GPRS services,

and EDGE services.Supports transmit diversity and 4-way receive diversit

y.Amplifies the output power

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Functional structure of DTRU

DTRU Baseband and RF Unit (DBRU)

DTRU Power Amplifier Unit (DPAU)

DTRU Power Supply Unit (DTPS)

DTMU

DTPS

DTRU

- 48V DC

DPAU

DBRUDAFU

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Indicators on DTRU

Indicator Color Description Status Meaning

RUN Green Indicates the running and power-on of the DTRU

On There is power supply or the board is faulty.

Off There is no power supply and the board is faulty.

Slow flash (0.25 Hz)

The board is starting.

Slow flash (0.5 Hz)

The board is running.

Fast flash (2.5 Hz) The DTMU is sending configuraiton parameters to the DTRU.

ACT Green Indicates the TRX is working

On The board is running (the DTMU sends configuration parameters to the DTRU correctly and the cell is starting). All the channels on the two carriers can work normally.

Off Communication between DTRU and DTMU is not set up

Slow flash (0.5Hz) Only parts of the logic channels are working normally (including after TRX mutual aid).

ALM Red Indicates alarm On (including high-frequency flash)

Critical alarm occurs to the board.

Off The board is normal.

RF_IND Red RF interface indicators

On Standing wave alarm

Off Normal

Slow flash (0.5 Hz)

RL alarm

DTRU

TX1

IN1

TCOM

IN2

TX2

RST

RUN

ACT

ALM

RF_IND

PWR

RXM1

RXD1

RXM2

RXD2

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Indicators on DTRU

Interface Type Description

TX1 N (male) TX1 output signals: Output to the forepart of the RF when not in combiner Output to IN1 in combiner

IN1 SMA (female) Connects to TX1 in combiner

TCOM N (male) Combines and outputs IN1 and IN2 or implements PBT combined

output

IN2 SMA (female) Connects to TX2 in combiner

TX2 N (male) TX2 output signals: Output to the forepart of the RF when not in combiner Output to IN2 in combiner

RXM1 SMA (female) Main or diversity 1 receive port of carrier 1

RXD1 SMA (female) Diversity 1 or 2 receive port of carrier 1

RXM2 SMA (female) Main receive port of carrier 2 or Diversity 3 receive port of carrier 1

RXD2 SMA (female) Diversity receive port of carrier 2 or Diversity 4 receive port of

carrier 1

PWR 3V3 Power supply

DTRU

TX1

IN1

TCOM

IN2

TX2

RST

RUN

ACT

ALM

RF_IND

PWR

RXM1

RXD1

RXM2

RXD2

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DTRU transmit mode-transmit independence

TCOM

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

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DTRU transmit mode-transmit diversity

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Man made multi way

combinercombiner

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DTRU transmit mode-PBT

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

Same phase

combinercombiner

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DTRU transmit mode-wideband transmit combination

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

combinercombiner

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DTRU receive mode- Receive independence

TRX1TRX1

TRX0TRX0

TX

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

dividerdivider

combinercombiner

dividerdivider

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DTRU receive mode- Receive diversity

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

dividerdivider

dividerdivider

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DTRU receive mode- 4-way receive diversity

TRX0TRX0

TX

TRX1TRX1

TXdividerdivider

dividerdivider

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

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Intra structure of DTRU

TRX0TRX0

TX

TRX1TRX1

TX

TX1

IN1

TCOM

IN2

TX2

RXM1

RXD1

RXM2

RXD2

combinercombiner

dividerdivider

dividerdivider

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Typical configuration S1/1/1（ transmit independence mode ）

S1/1/1 transmit independence mode ，Each cell is configured one DTRU and

one DDPU.

The connection for one cell is showed i

n the right slide

BSC data configuration should be ： tr

ansmit independence mode ， receive

independence mode

Cabinet Top power （ dBm ）：（ 46 or

47.8 ） -1.0

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

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Typical configuration S1/1/1（ transmit diversity+4-way receive diversity ）

S1/1/1 transmit diversity+4-way re

ceive mode ， each cell is configu

red one DTRU and two DDPU

BSC data configuration should be ： transmit diversity mode

4-way receive mode

Cabinet Top power （ dBm ）：（ 46 or 47.8 ） -1.0

DTRU

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

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Typical configurationS2/2/2（ transmit independence mode ）

S2/2/2 transmit independence mode ， Ea

ch cell is configured one DTRU and one

DDPU

The connection for one cell is showed in th

e right slide

BSC data configuration should be ： transmit independence mode ， receiv

e diversity mode

Cabinet Top power （ dBm ）：（ 46 or 4

7.8 ） -1.0

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

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Typical configurationS2/2/2（ PBT mode ）

S2/2/2 PBT mode ， each cell is c

onfigured two DTRU and one DD

PU

The connection for one cell is sho

wed in the right slide

BSC data configuration should be ：PBT mode

receive independence mode

Cabinet Top power （ dBm ）： 49

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

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Typical configuration S4/4/4（ wideband transmit combination mode ）

S4/4/4 wideband transmit combination

mode ， each cell is configured two

DTRU and one DDPU

BSC data configuration should be ：wideband transmit combination mode ，receive diversity mode

Cabinet Top power （ dBm ）：（ 46

or 47.8 ） -3.3-1.0

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

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Typical Configuration S1/2/1

S1/2/1,cell1 and cell 3 need s

hare one DTRU, cell 2 need c

onfigure one DTRU and one

DDPU.

BSC data configuration shoul

d be ：

DTRU1 ： transmit independ

ence mode ， receive indepe

ndence mode ； DTRU2 ： tr

ansmit independence mode ，receive independence diversit

y modeDTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

DTRU

TX 1

TCOM

RXM 1

RXM 2

RXD 1

RXD 2

TX 2

IN2

IN 1

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Typical configuration S8/8/8

S8/8/8 cell 1 and cell 3 ar

e configured 4 DTRU,2

DCOM and 1 DDPU

BSC data configuration s

hould be ： wideband tra

nsmit combination mode ，receive diversity mode

Cabinet top power （ dB

m ）：（ 46 or 47.8 ） -3.

3-3.3-1.0

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com

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Typical configuration S8/8/8

S8/8/8 cell2 is configure

d 4 DTRU,2 DCOM and

2 DDPU, cell 2 need cros

s the cabinet

BSC data configuration s

hould be ： wideband tra

nsmit combination mode ，receive diversity mode

Attention ： only support

frequency hopping

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com

RF-EX1

RF-EX2

RF-EX3

RF-EX4

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

DDPU

TX B

RXB1

RXA1

RXA2

RXA3

RXA4

RXB2

RXB3

RXB4

TX A

TX 2

TX1

DTRU

TX 1

TCOM

TX 2

IN2

IN 1

Tx-com

RF-EX1

RF-EX2

RF-EX3

RF-EX4