gbc 022 e0 0 zxg10-b8018 description-51

GBC_022_E0_0 ZXG10-B8018 Description

Course Objectives:

z State ZXG10-B8018 cabinet and shelves structure z Understand ZXG10-B8018 board principle and function z Understand board indicator and main external interfaces

i

Contents

1 Cabinet and Shelves ................................................................................................................................... 1

1.1 Cabinet Composition......................................................................................................................... 1

1.2 Cabinet Top ....................................................................................................................................... 2

1.2.1 Cabinet Top Structure............................................................................................................. 2

1.2.2 Cabinet Top Interfaces............................................................................................................ 3

1.3 Shelves ............................................................................................................................................ 12

1.3.1 Top-Layer Shelf.................................................................................................................... 12

1.3.2 Carrier Shelf ......................................................................................................................... 13

1.4 Plug-in Boxes .................................................................................................................................. 14

1.4.1 Fan Plug-in Box ................................................................................................................... 14

1.4.2 Air Filter Plug-in Box........................................................................................................... 14

1.5 Backplane........................................................................................................................................ 15

2 Boards, Modules and Switches................................................................................................................ 17

2.1 Controller & Maintenance Board (CMB) ....................................................................................... 17

2.1.1 Functions .............................................................................................................................. 17

2.1.2 Functional Diagram.............................................................................................................. 18

2.1.3 CMB Panel ........................................................................................................................... 19

2.1.4 External Interfaces................................................................................................................ 21

2.1.5 DIP Switches ........................................................................................................................ 21

2.2 E1/T1 Interface Board (EIB)........................................................................................................... 22

2.2.1 Functions .............................................................................................................................. 23

2.2.2 Functional Diagram.............................................................................................................. 23

2.2.3 EIB Panel ............................................................................................................................. 23

ii

2.2.4 DIP Switches ........................................................................................................................23

2.3 Power Distribution Module (PDM).................................................................................................24

2.3.1 Functions ..............................................................................................................................25

2.3.2 Functional Diagram ..............................................................................................................25

2.3.3 PDM Panel............................................................................................................................25

2.4 Transceiver Module for EDGE (DTRU) .........................................................................................26

2.4.1 Functions ..............................................................................................................................26

2.4.2 DTRU Panel .........................................................................................................................27

2.4.3 Panel Indicators ....................................................................................................................28

2.4.4 External Interfaces................................................................................................................28

2.5 Antenna Equipment Module (AEM) ...............................................................................................29

2.5.1 Classification ........................................................................................................................30

1

1 Cabinet and Shelves

1.1 Cabinet Composition

1.1.1.1 Exploded View

The cabinet consists of the main body, doors, top, base, and several shelves and plug-in

boxes.

The main body of the cabinet is a whole welded from columns, shell, bottom, and top.

Fig 1.1-1 shows the structure of the cabinet.

1 2 3 4 5 6 7 8

9 10 11 12

1. Rear door 2. Grounding screw 3. Cabinet top

4. Top-layer shelf 5. Fan plug-in box 6. Carrier shelf

7. Side baffle 8. Front door 9. Horizontal cabling rack

10. Cabinet main body 11. Base 12. Air filter plug-in box

Fig 1.1-1 Cabinet Structure


2

1.2 Cabinet Top

1.2.1 Cabinet Top Structure

The top of ZXG10 B8018 (V1.00) cabinet is used to install antennas, power switches,

filters, grounding posts/sockets, and other sockets. Holes are designed on the back of the

cabinet top as hot air outlets.

The layout of the cabinet top is shown in Fig 1.2-1.

1

2

3

1. Interfaces 2. Clamping slot 3. Power box

Fig 1.2-1 Cabinet Top Layout

Chapter 1 Cabinet and Shelves

3

The interfaces on the cabinet top are shown in Table 1.2-1.

Table 1.2-1 Interfaces on the Cabinet Top

Interface Name Socket Type Description

HYCOM1

HYCOM12 - Antenna feeder interfaces

PWRTA_L1 DB9 female socket Power interface of the first layer of tower mounted

amplifier

PWRTA_L2 DB9 female socket Power interface of the second layer of tower

mounted amplifier

PWRTA_L3 DB9 female socket Power interface of the third layer of tower mounted

amplifier

E1 PORT1 DB25 male socket E1 interface (A, B, C, D)

E1 PORT2 DB25 male socket E1 interface (E, F, G, H)

RELAY_ALM DB25 male socket Dry contact alarm interface

ID PORT DB25 male socket Site ID interface

SYNC DB25 male socket Inter-cabinet synchronization signal interface

13M BNC female socket 13M clock test interface

FCLK BNC female socket FCLCK clock test interface

PWR - -48 V power binding post (in the power box)

GND - -48 V power grounding post (in the power box)

PE - Grounding post

RJ45 - Ethernet interface

1.2.2 Cabinet Top Interfaces

1.2.2.1 Interface between Primary Power and BTS Equipment

ZXG10 B8018 (V1.00) uses 48 V DC power.

The primary power is introduced from the power interface on the cabinet top.

The interface between primary power and the BTS equipment is described in Table 1.2-2.

Table 1.2-2 Primary Power Interface Signal Description

Pin No. Signal Name Signal Definition Connector

1 -48 V GND 0 V DC.

2 -48 V -48 V DC. The two power binding posts


4

1.2.2.2 Antenna Feeder Interface

Twelve antenna feeder interfaces are provided on B8018 cabinet top: HYCOM1 ~

HYCOM12. Antenna feeder cables pass through these interfaces.

1.2.2.3 Tower Mounted Amplifier Interface (PWRTA)

The PWRTA interface is located on the cabinet top. Each BTS cabinet provides three

such interfaces: PWRTA_1 ~ PWRTA_3.

Signals of the three interfaces are defined in Table 1.2-3.

Table 1.2-3 Signal Description of PWRTA_1 ~ PWRTA_3


1 TA-PWR0 TMA power 0




5 AGND Analog ground

6 AGND TMA power 0 analog ground




DB9

1.2.2.4 Grounding Interface (PE)

The BTS cabinet top provides a PE interface directly connected with the protection

ground of the equipment room. All digital grounds, analog grounds, and protection

grounds inside the cabinet are grounded to the PE interface and the equipment room

ground.

1.2.2.5 13 M Test Interface

Signals of the 13 M test interface are defined in Table 1.2-4.

Table 1.2-4 Signal Description of 13 M Test Interface

Pin Signal Name Signal Definition Connector

Core TEST_CLK_13M 13 M clock for test

Shell AGND Analog ground BNC


5

1.2.2.6 FCLK Test Interface

Signals of the FCLK test interface are defined in Table 1.2-5.

Table 1.2-5 Signal Description of FCLK Test Interface

Pin Signal Name Signal Definition Connector

Core TEST_FCLK FCLK clock for test

Shell AGND Analog ground BNC

1.2.2.7 External Environment Monitoring Interface RELAY_ALM

The external environment monitoring equipment provides two kinds of interfaces:

y RS232 serial ports

y Dry contacts for reflecting the alarm status

On the top of ZXG10 B8018 (V1.00) cabinet, DB25 male connectors are designed to

connect alarm status signals from the dry contacts. The cabinet supports the inputs of at

most ten pairs of dry contacts and the outputs of at most two pairs of dry contacts.

The dry contact signal interface is explained in Table 1.2-6.

Table 1.2-6 Signal Description of the Dry Contact Signal Interface


1 ALM_IN0+ Dry contact input

2 ALM_IN0- Dry contact input











13 ALM_OUT0+ Dry contact output

14 ALM_OUT0- Dry contact output

15 ALM_OUT2+ Dry contact output

DB25


6


16 ALM_OUT2- Dry contact output









25 DGND Digital ground

1.2.2.8 Site ID Interface

There is a D connector on the top of each ZXG10 B8018 (V1.00) cabinet. Inside this

connector, there is a circuit board DIDB with two DIP switches used to set the site ID.

The site ID interface is described in Table 1.2-7.

Table 1.2-7 Site ID Interface Signal Description


1 ID0 Bit 0 of the site ID

















18 - -

19 - -

DB25


7


20 - -

21 - -

22 - -

23 - -

24 - -

25 - -

The CMB reads ID when being powered on and initialized to decide the cabinet level

(basic/extended), synchronization clock port of SDH network, and the O&M timeslot

position.

When the switches are set to ON, the ID status collected by the CMB is 0; otherwise, the

status is 1.

y Note

y For DIP switches S1 and S2, 0 means ON and 1 means OFF.

y Bits 1 ~ 8 of DIP switch S1 stand for bits 0 ~ 7 of the ID while bits 1 ~ 8 of S2 stand for bits 8 ~ 15 of the ID.

ID is a 16-bit serial number, as shown in Fig 1.2-2.

Fig 1.2-2 Cabinet-Top DIP Switches

The meaning of each bit is explained as follows:

1. BTS_TYPE

y 1100: B8018

y 1101: B8112

y 1110: M8202

y 1111: M8204

2. BTS_NO


8

Cabinet number in the same site

y 00: Basic cabinet

y 01: Extended cabinet 1

y 10: Extended cabinet 2

3. SLAVE1_PORT

The E1 port of the basic cabinet to connect extended cabinet 1

y 00: Port E of the basic cabinet

y 01: Port F of the basic cabinet

y 10: Port G of the basic cabinet

y 11: Port H of the basic cabinet 4. SLAVE2_PORT

The E1 port of the basic cabinet to connect extended cabinet 2

y 00: Port E of the basic cabinet

y 01: Port F of the basic cabinet

y 10: Port G of the basic cabinet

y 11: Port H of the basic cabinet 5. SATE

Whether to use the satellite Abis link or not

y 0: Common Abis

y 1: Satellite Abis 6. ABIS_PORT

O&M port number

y 00: Port A

y 01: Port B

y 10: Port C

y 11: Port D 7. ABIS_TS


9

The O&M LAPD timeslot on Abis interface

y 000: TS16

y 001: TS31

y 010: TS30

y 011: TS29

y 100: TS28

y 101: TS27

y 110: TS26

y 111: TS25

The number of the E1 port of the basic cabinet to connect the lower-level site cannot be

the same as of SLAVE_PORT1 or SLAVE_PORT2.

1.2.2.9 E1 Interface

In ZXG10 B8018 (V1.00), the Abis interface and the inter-cabinet cascaded interfaces all

use E1 interfaces.

The signals of E1 interface are defined in Table 1.2-8 and Table 1.2-9.

Table 1.2-8 E1 PORT1 Interface Signal Description


1 AIN+ E1_A interface signal input

2 BIN+ E1_B interface signal input

3 - -

4 CIN+ E1_C interface signal input

5 DIN+ E1_D interface signal input

6 - -

7 - -

8 AOUT+ E1_A interface signal output

9 BOUT+ E1_B interface signal output

10 - -

11 COUT+ E1_C interface signal output

12 DOUT+ E1_D interface signal output

13 - -

14 AIN- E1_A interface signal input

DB25


10


15 BIN- E1_B interface signal input

16 - -

17 CIN- E1_C interface signal input

18 DIN- E1_D interface signal input

19 - -

20 AOUT- E1_A interface signal output

21 BOUT- E1_B interface signal output

22 - -

23 COUT- E1_C interface signal output

24 DOUT- E1_D interface signal output

25 - -

Table 1.2-9 E1 PORT2 Interface Signal Description


1 EIN+ E1_E interface signal input

2 FIN+ E1_F interface signal input

3 - -

4 GIN+ E1_G interface signal input

5 HIN+ E1_H interface signal input

6 - -

7 - -

8 EOUT+ E1_E interface signal output

9 FOUT+ E1_F interface signal output

10 - -

11 GOUT+ E1_G interface signal output

12 HOUT+ E1_H interface signal output

13 - -

14 EIN- E1_E interface signal input

15 FIN- E1_F interface signal input

16 - -

17 GIN- E1_G interface signal input

18 HIN- E1_H interface signal input

19 - -

20 EOUT- E1_E interface signal output

21 FOUT- E1_F interface signal output

22 - -

23 GOUT- E1_G interface signal output

DB25


11


24 HOUT- E1_H interface signal output

25 - -

1.2.2.10 Inter-cabinet Synchronization Signal Interface (SYNC)

LVDS lines are used between ZXG10 B8018 (V1.00) cabinets to transmit the

synchronization clock (SYNCLK).

Physically, a twisted pair with D connectors is used as the differential line.

The inter-cabinet synchronization signal interface is defined in Table 1.2-10.

Table 1.2-10 Signal Description of Inter-Cabinet Synchronization Signal Interface


1 - -

2 - -


4 SYNCLKIN+ SYNCLK input


6 SYNCLK0+ SYNCLK output





11 - -

12 - -

13 - -

14 - -

15 - -


17 SYNCLKIN- SYNCLK input


19 SYNCLK0- SYNCLK output





24 - -

25 - -

DB25


12

1.2.2.11 Ethernet Interface

In ZXG10 B8018, Abis interface supports both E1 interface and Ethernet interface.

Information between BSC and BTS is transferred in the form of IP packet. In the case of

Abis interface working as Ethernet interface, E1 interface is still used for cascading with

lower-level site.

The signals of Ethernet interface are defined in Table 1.2-11.

Table 1.2-11 Signal Description of RJ45 Interface


1 ABIS_ETH_TX+ Abis interface TX signal

2 ABIS_ETH_TX- Abis interface TX signal

3 ABIS_ETH_RX+ Abis interface RX signal

4 - -

5 - -

6 ABIS_ETH_RX- Abis interface RX signal

7 - -

8 - -

RJ45

1.3 Shelves

1.3.1 Top-Layer Shelf

In the top-layer shelf, one PDM, one EIB/FIB and two CMBs can be installed.

The structure of the top-layer shelf in its full configuration is shown in Fig 1.3-1.

Fig 1.3-1 Top-Layer Shelf Full Configuration

Configuration


13

Functions and Principles

The PDM distributes -48 V power to the CMB, DTRU and other modules, and provides

the overload protection function.

The EIB/FIB provides the base station interfaces.

Being the main control unit of the BTS, the CMB implements the following functions:

1. Provides all the clocks needed by BTS

2. Completes remote operation & maintenance of BTS

3. Completes local operation & maintenance of BTS

4. Collects equipment alarm information and provides hot active/standby function.

1.3.2 Carrier Shelf

In each carrier shelf, three AEMs and three DTRUs can be installed. The three AEMs are

installed on the two sides of the carrier shelf.

A carrier shelf in its full configuration is shown in Fig 1.3-2.

Fig 1.3-2 Modules in the Carrier Shelf

The DTRU controls and processes radio channels in GSM system, sends/receives radio

channel data, modulates/demodulates baseband signals on the radio carrier, and

sends/receives radio carrier signals.

The AEM combines and divides air signals.

Configuration

Functions and Principles


14

1.4 Plug-in Boxes

1.4.1 Fan Plug-in Box

The ZXG10 B8018 (V1.00) cabinet has three fan plug-in boxes located above the three

carrier shelves for heat dissipation.

The structure of a fan plug-in box is shown in Fig 1.3-2.

2

1

3

1. Fan module 2. Fan panel 3. Fan control board

Fig 1.3-2 - Structure of Fan Plug-in Box

Each fan plug-in box can hold two fan modules that can be independently

plugged/unplugged to ensure that they do not affect each other during their running.

There are sockets on the back of each fan plug-in box and on the rear columns to connect

the fan plug-in box with the rear columns.

On the back of each fan plug-in box is a fan control board to control the rotation speed

and wind volume of the fans, based on the temperature measured by the temperature

probe on this fan control board.

1.4.2 Air Filter Plug-in Box

Located in the bottom layer of the cabinet, the air filter plug-in box performs the

dustproof function.

The structure of the air filter plug-in box is shown in Fig 1.4-1.

Configuration


15

1

2

1. Dustproof cotton 2. Structural part of the air filter plug-in box

Fig 1.4-1 Air Filter Plug-in Box Structure

1.5 Backplane

There are two types of backplanes in ZXG10 B8018 (V1.00) cabinet.

1. BBCM (Control & Maintenance Backplane Board)

The backplane used by the top-layer shelf is BBCM. The PDM in top-layer shelf

has no backplane.

y The BBCM bears the active and standby CMBs and transmits information between the active/standby CMBs and the Abis interface board EIB/FIB.

2. BBTR (Transceiver Backplane Board)

The backplane used by the carrier shelf is BBTR.

The BBTR can bear three DTRUs and three AEMs. It provides the following

functions:

y Sends the clock and downlink data from the CMB to the DTRU, and sends the uplink data from the DTRU to the CMB.

y Receives the alarms output by the AEM and the FCM.

y Supplies 12 V tower mounted amplifier power to the cabinet top.

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2 Boards, Modules and Switches

2.1 Controller & Maintenance Board (CMB)

CMB is a major digital board in ZXG10 B8018 (V1.00) providing interface and central

control functions. CMB works in active/standby mode, to avoid interruption and give

protection to the services.

2.1.1 Functions

The functions of CMB are listed below:

1. Provides eight E1/T1 interfaces.

2. Overall radio clock and transmission clock synchronization can be achieved by

configuring CMB for overall network synchronization at background.

3. Implements switching of thirty-two 2 M HW time slots with 2 bit switching array.

4. Provides transparent passage for external environment alarm.

5. Implements multi-BTS PCM link sharing.

6. Supports star, chain, tree, and ring networking at Abis interface.

7. Provides combined cabinets capacity expansion among many physical racks of one

site.

8. Provides all kinds of clock needed in BTS; including clock signal of 13 MHz, 2.048

MHz, 60 ms, 8K_8MW, 8 MHz, 16 MHz and so on.

9. Detects, controls, and maintains the whole BTS system, support near-end and

far-end management interface (the near-end interface is 10BaseT Ethernet network

management interface).

10. Manages program of each board and version of FPGA configuration file in system.

Support near-end and far-end version update.

11. Monitoring and control of each board running status includes:

y Detect in-position indication

y Send control command by control link


18

y Software reset each board in system

y Implement power switch of each board in system,

y Implement power ON/OFF of each board in system by interruption signal

12. Employ digital loose coupling with micro-processor based phase locked loop.

Synchronize various external reference clocks. The system is capable to filter jitter

and wander noise (external reference source can be Abis line recovery clock, and

can be chosen by CMU according to actual configuration).

13. Board power interface (-48 V, -48 V ground, protection ground, digital ground) has

the inverse polarity protection function for power connection.

14. Implements, and reads various hardware management IDs of system, for example:

y Rack number (ID_DOG)

y Layer number

y Slot number

y Board function type

y Hardware version of board

15. Reset button, switching push button, and compulsive power on button are available

at front panel

16. Board provides active/standby switching

17. Active/standby signal is multiplexed by high impedance

18. Provides compulsive power ON module for board/module

2.1.2 Functional Diagram

The functional diagram of the board is shown in Fig 2.1-1.

Chapter 2 Boards, Modules and Switches

19

Fig 2.1-1 Cmb Functional Diagram

2.1.3 CMB Panel

The CMB Panel is shown in Fig 2.1-2.

CMB

PWR RUN SYN CLK MST STA M/S RST FPWR

Fig 2.1-2 CMB Panel

There are six LEDs on CMB panel: PWR, RUN, SYN, CLK, MST, and STA respectively.

Description of CMB panel LEDs is given in Table 2.1-1.

Table 2.1-1 CMB Panel LEDs

LED

Position Color Name Meaning Working Mode

1 Green/Red PWR Power LED

1.Green ON: Normal

2.Red ON: Alarm

3.OFF: Power off or other reasons

2 Green RUN Running LED

1. Green flashing at 4 Hz: Boot is running

2. Green flashing at 1 Hz: Application is running

3. Others: System is abnormal

3 Green/Red SYN Clock 1. Green ON: Abis interface network synchronization


20

LED

Position Color Name Meaning Working Mode

synchronization

mode LED

clock

2. Green flashing at 1 Hz: SDH network synchronization

clock

3. Red flashing at 1 Hz: E1 frame out-of-sync alarm

4. Red ON: E1 line is broken or not connected

5. OFF: Free oscillating

4 Green/Red CLK Clock LED

1. Green ON: Network synchronization is locked

2. Green flashing at 1 Hz: Locking the phase

3. Red ON: Clock fault

5 Green MST Active/Standby

LED

1. Green ON: Active state

2. Green OFF: Standby state

6 Green/Red STA Status LED

1. OFF: Running normally

2. Green flashing at 1 Hz: System initialization (Low).

3. Green flashing at 4 Hz: Software loading

4. Red flashing at 1 Hz: LAPD link disconnection (High).

5. Red flashing at 4 Hz: HDLC link disconnection (Low).

6. Red ON: Other alarms (such as temperature, clock and

frame number alarms)

y Note

1. Low refers to low priority alarms and High refers to high priority alarms.

2. No LAPD link disconnection alarm is defined for the standby CMB.

3. The HDLC link disconnection alarm of the active CMB in the basic cabinet is

defined as CCComm indication (communication between active CMBs of different

cabinets). The HDLC link disconnection alarm of all the standby CMBs is defined

as CMComm indication (communication between active and standby CMBs).

When CMB is powered on, the PWR LED remains ON in green color. During the

hardware initialization, all LEDs flash once to indicate that the LEDs are working

normally. If the self-test fails, the RUN LED turns red, and the board restarts in 3

seconds.

CMB panel provides one External Test Port (ETP), two buttons (one reset button RST

and one manual active/standby switchover button M/S), and one switch (FPWR).

Buttons and switch on the CMB panel are defined in Table 2.1-2.


21

Table 2.1-2 Buttons and Switch on CMB Panel

Name Type Meaning Function

M/S Lock-free button Active/standby

switchover button

1. This button is invalid if the board is standby.

2. If the board is active and there exists a standby board

working normally, press this button for active/standby

switchover.

RST Lock-free button Reset button Press this button to reset this module.

FPWR Switch Power It forcefully powers on all DTRUs.

2.1.4 External Interfaces

On the CMB panel, there is only one test port, ETP. Connect the PC with BTS, ZXG10

B8018 (V1.00) using RS232 serial port and the network port for local operation and

maintenance on the LMT, as shown in Fig 2.1-3.

MOMMI

MO

MOBTS

CMM

LMT ...

Fig 2.1-3 Local Operation and Maintenance of ZXG10 B8018 (V1.00)

2.1.5 DIP Switches

The board layout, showing DIP Switches is shown in Fig 2.1-4.


22

Fig 2.1-4- Board Layout Showing DIP Switches

The S7 DIP switches are described in Table 2.1-3, while S10 DIP switches are described

in Table 2.1-4.

Table 2.1-3 S7 DIP Switches

Circuitry Interface Mode Switch 1 Switch 2 Switch 3 Switch 4

Hold ON ON

100 T1 OFF ON

120 E1 ON OFF

75 E1

Hold

OFF OFF

To select between 2 MHz

clock and network clock.

Default is 1 (Network clock)

Table 2.1-4 S10 DIP Switches

Circuitry Interface Mode Switch 1 Switch 2 Switch 3 Switch 4

ALM_IN11 input ON ON OFF OFF

2 MHz clock input OFF OFF ON ON

No external input OFF OFF OFF OFF

Hold ON ON ON ON

2.2 E1/T1 Interface Board (EIB)

The EIB provides the Abis interface connecting to the BSC.


23

2.2.1 Functions

Main function of EIU (E1/T1 Interface Unit) are as follows:

1. Provide line impedance matching of 8 E1/T1

2. Signal isolation at IC side and line side

3. Line protection at E1/T1 line interface

4. Bypass function of E1/T1 line.

5. Provides type information of interface board to CMU


Functional diagram of EIB is shown in Fig 2.2-1.

EIB8 E1/T1

Fig 2.2-1 EIB Functional Diagram

2.2.3 EIB Panel

EIB Panel is shown in Fig 2.2-2.

EIB

Fig 2.2-2 EIB Panel

2.2.4 DIP Switches

The board layout, showing DIP Switches is shown in Fig 2.2-3.


24

S2

S4

S6

S5

Fig 2.2-3 Board Layout Showing DIP Switches

There are four DIP switches on EIB board to select line impedance: S2, S4, S5, and S6.

These are described in Table 2.2-1.

Table 2.2-1 DIP Switches Meanings

- S2 S4 S5 S6

PIN 1, 2 E1C E1A E1G E1E

PIN 3, 4 E1D E1B E1H E1F

Table 2.2-2 shows the working mode of DIP switches.

Table 2.2-2 DIP Switches Working Modes

Line interface mode 1 2 3 4

100 T1 OFF ON OFF ON

120 E1 OFF OFF OFF OFF

75 E1 ON OFF ON OFF

2.3 Power Distribution Module (PDM)

The ZXG10 B8018 (V1.00) adopts the fully distributed power supply. It distributes -48 V

primary power to CMB and DTRU. The secondary power supply for each module is

generated by the power supply module, present on each module.


25

2.3.1 Functions

PDM distributes the -48 V power to CMBs, DTRUs and FCMs, and provides overload

protection via circuit breakers. In addition to a circuit breaker for each module, a main

switch circuit breaker is placed at the -48 V input end on the top of the BTS cabinet.


Functional diagram of PDM is shown in Fig 2.3-1.

PWR

-48VGND

CMB1

CMB2

DTRU1

DTRU9

Circuit breaker Filter

2 CMBs

9 DTRUs

PWRGND

-48V

.

.

.

Fig 2.3-1 PDM Functional Diagram

2.3.3 PDM Panel

The PDM panel is shown in Fig 2.3-2.

Fig 2.3-2 PDM Panel


26

There are 12 breakers on the PDM panel controlling the power supply of two CMBs, one

EIB, and nine DTRUs.

2.4 Transceiver Module for EDGE (DTRU)

The DTRU controls and processes radio channels in the GSM system, sends/receives

radio channel data, modulates/demodulates baseband signals on the radio carrier,

sends/receives radio carrier signals, and collects alarms of the fans and AEMs.

To adapt to different GSM systems and different output power requirements, different

DTRUs have been designed for ZXG10 B8018 (V1.00). Table 2.4-1 shows the types of

DTRUs.

Table 2.4-1 Types of DTRUS

Working Band Module Name

SM 900 DTRUG

GSM 850 DTRUM

GSM 1800 DTRUD

GSM 1900 DTRUP

2.4.1 Functions

Main functions of DTRU are as follows:

1. Processes 2 carriers at maximum in downlink:

y Complete rate adaptation

y Channel coding and interleaving

y Encryption

y Generating TDMA burst pulse

y Complement GMSK/8PSK modulation

y Digital up-conversion of the two carriers

2. Processes 2 carriers at maximum in uplink:

y Implement uplink digital down conversion

y Diversity combining of receiver


27

y Digital demodulation (GMSK and 8PSK demodulation, equalization)

y Decrypting

y De-interleaving

y Rate adaptation

3. Implement processing of uplink and downlink RF signal.

4. Receive the system clock from CMB and generate the clock needed by this module.

5. Implement and read various hardware management IDs of system: rack number, slot

number, board function type, and hardware version of board, and so on.

6. Implement communication of service data and operation and maintenance signaling

through one 8 Mbps HW.

7. Receive switching signal of CMB to complete power ON/OFF of module.

8. Support online update and load of software version, support version update of

programmable device.

9. Detect working state of module, collect alarm signal in real time and report it to

CMB.

10. Support RF frequency hopping, DPCT, downlink transmission diversity, and four

diversities reception in uplink.

11. Support close-loop power control.

12. Provide debugging serial interface and network interface.

13. Board power interface (-48 V, -48 V ground, protection ground, digital ground) has

the inverse polarity protection function for power connection.

14. Delayed start function and intelligent power ON/OFF function.

2.4.2 DTRU Panel

DTRU Panel is shown inFig 2.4-1.


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DTRUG

TX1

TXcomRXM1

RXM2

RXD1

RXD2

TX2

PWR

RUN

MOD

ACT1

ACT2

STA

RST

ETP

Fig 2.4-1 DTRU Panel

2.4.3 Panel Indicators

Panel indicators are given in Table 2.4-2.

Table 2.4-2 DTRU Panel LEDs

Identifier Full Name Meaning

PWR Power Power LED

RUN Run Running LED

MOD Model BCCH mode LED

ACT1 Active Channel activation LED1

ACT2 Active Channel activation LED2

STA State Status LED

RST Reset Reset button

2.4.4 External Interfaces

DTRU External Interfaces are described in Table 2.4-3.


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Table 2.4-3 DTRU External Interfaces

Identifier Meaning

RXM1 Receiver 1

RXD1 Receiver 1 (for diversity)

RXM2 Receiver 2

RXD2 Receiver 2 (for diversity)

TX1 Transmitter 1

TX2 Transmitter 2

TXcom Transmitter Combiner

ETP Extend Test Port

2.5 Antenna Equipment Module (AEM)

The location of AEM in the system is shown in Fig 2.5-1.

DTRU

TX

RXAEM

Fig 2.5-1 AEM Location in the System

The AEM provides the following functions:

1. Combines the transmit signals of multiple carriers.

2. Provides bidirectional signal channels from the BTS to the antenna for the

transmitting band and from the antenna to the BTS for the receiving band.

3. Gives an alarm when the VSWR of the antenna port deteriorates.

4. Suppresses the interference out of the working band and spurious emission.

5. Flexibly configures carriers.

6. Implements diversity receiving.


30

2.5.1 Classification

The AEM consists of CDU and CEU. The CDU is the major component while CEU

cooperates with CDU to configure a specific number of carriers of BTS.

In addition, each AEM contains one power interface board (DAEM), which supplies

power to the internal and external amplifiers of AEU and reports alarm signals to TPU.

To adapt to different working bands such as GSM900, EGSM900, GSM850, GSM1800

and GSM1900, different AEMs have been designed for ZXG10 B8018 (V1.00).

Table 2.5-1 shows the types of AEMs according to working bands.

Table 2.5-1 Types of AEMs (According to Working Bands)

Unit Name Module Name Working Frequency

CDUG Rx890 MHz ~915 MHz Tx935 MHz ~960 MHz

BCDUG Rx880 MHz ~905 MHz Tx925 MHz ~950 MHz

CCDUG Rx885 MHz ~910 MHz Tx930 MHz ~955 MHz

RCDUG_8M Rx882 MHz ~890 MHz Tx927 MHz ~935M Hz

RCDUG_10M Rx880 MHz ~890 MHz Tx925 MHz ~935 MHz

CDUD Rx1710 MHz ~1785 MHz Tx1805 MHz ~1880 MHz

CDUC Rx824 MHz ~ 849 MHz Tx869 MHz~894 MHz

CDU

CDUP Rx1850 MHz~1910 MHz Tx1930 MHz~1990 MHz

CEUG Rx880 MHz ~915 MHz Tx925 MHz ~960 MHz

CEUD Rx1710 MHz ~1785 MHz Tx1805 MHz ~1880 MHz

CEUC Rx824 MHz ~ 849 MHz Tx869 MHz~894 MHz

CEUP Rx1850 MHz~1910 MHz Tx1930 MHz~1990 MHz

CEU

CEUG/2 Rx880MHz ~915MHz Tx925MHz ~960MHz


31


CEUD/2 Rx1710 MHz ~1785 MHz Tx1805 MHz ~1880 MHz

CEUC/2 Rx824 MHz ~ 849 MHz Tx869 MHz~894 MHz

CEUP/2 Rx1850 MHz~1910 MHz Tx1930 MHz~1990 MHz

CENUG Rx880 MHz ~915 MHz Tx925 MHz ~960 MHz

CENUD Rx1710 MHz ~1785 MHz Tx1805 MHz ~1880 MHz

CENUC Rx824 MHz ~ 849 MHz Tx869 MHz~894 MHz

CENUP Rx1850 MHz~1910 MHz Tx1930 MHz~1990 MHz

CENUG/2 Rx880 MHz ~915 MHz Tx925 MHz ~960 MHz

CENUD/2 Rx1710MHz ~1785MHz Tx1805MHz ~1880MHz

CENUC/2 Rx824 MHz ~ 849 MHz Tx869 MHz~894 MHz

CENUP/2 Rx1850 MHz~1910 MHz Tx1930 MHz~1990 MHz


CENUD/3 Rx1710 MHz ~1785 MHz Tx1805 MHz ~1880 MHz




CENUD/4 Rx1710 MHz ~1785 MHz Tx1805 MHz ~1880 MHz


CENU


ECDU ECDUG Rx890 MHz ~915 MHz Tx935 MHz ~960 MHz


32


ECDUD Rx1710 MHz ~1785 MHz Tx1805 MHz ~1880 MHzECDUC Rx824 MHz ~ 849 MHz Tx869 MHz~894 MHzECDUP Rx1850 MHz~1910 MHz Tx1930 MHz~1990 MHz

Comparison between different CEUs and CENUs is shown in Table 2.5-2.

Table 2.5-2 Comparison Between Different CEUs and CENUs

Name No. of Combiners & Splitters Width Slot No.

CEU 1.Two 2-to-1 Combiner

2.Two 1-to-2 Splitter 90 mm 1st, 6th

CEU/2 3. Two 2-to-1 Combiner

4.Two 1-to-2 Splitter 80 mm 5th

CENU 5.Two 3-to-1 Combiner

6.Two 1-to-4 Splitter 90 mm 1st, 6th

CENU/2 7.Two 3-to-1 Combiner


CENU/3 9. Two 3-to-1 Combiner


CENU/4 11.Two 3-to-1 Combiner


2.5.1.1 Combiner Distribution Unit (CDU)

CDUs are of different types with respect to different working bands:

1. CDUG

2. BCDUG

3. CCDUG

4. RCDUG_8M

5. RCDUG_10M

6. CDUC

7. CDUD

8. CDUP


33

The CDU is composed of four parts:

1. Broadband combiner

2. Transceiving duplexer

3. VSWR detection circuit

4. LNA (including a splitter)

The combiner combines the output signals from multiple transmitters into one output port

for output.

CDU functional blocks are shown in Fig 2.5-2.

Fig 2.5-2 CDU Functional Blocks

The CDU supports one 2-in-1 combiner, a 1-to-4 low-noise amplifier. It has two low

noise amplifiers with extended receiving output and one built-in duplexer.

All the CDUs have the same panel. The following example describes the CDUG panel.

The panel of the CDUG is shown in Fig 2.5-3.

Function

Functional Blocks

CDU Panel


34

Fig 2.5-3 CDUG Panel Structure

The following appear on the CDUG panel:

1. 5 LEDs

2. 1 Extended TX port (ETX)

3. 1 Radio test port (RTE)

4. 2 Combiner input ports (TX1 - TX2)

5. 4 Low-noise amplifier output ports (RX1 - RX4)

6. 2 Low-noise amplifier extended output ports (ERX1 - ERX2)

7. 1 Antenna feeder port (ANT)


35

CDUG external interfaces are given in Table 2.5-3.

Table 2.5-3 CDUG External Interfaces

Identifier Full Name Meaning

ETX Extended TX Extended TX port

RTE Radio Test Equipment Radio test port

TX1 Transmitter 1 Combiner input 1 (PA output signal)


RX1 Receiver 1 Low noise amplifier output port 1




ERX1 Extend Receiver 1 Low noise amplifier extended output port 1

ERX2 Extend Receiver 2 Low noise amplifier extended output port 2

ANT Antenna Antenna feeder port

The LEDs on the panels of different CDUs are same.

The five LEDs on the CDU panel are EPO, SWR1, SWR2, PWR and LNA respectively.

These are described in Table 2.5-4.

Table 2.5-4 CDU Panel LEDs

LED Position Color Name Meaning Working Mode

1 Green FPO Forward power output

LED

ON: Normal

OFF: Abnormal

2 Red SWR1 VSWR level-1 alarm

LED

ON: There is an alarm

OFF: There is no alarm


LED



4 Green PWR LNA power supply

LED

ON: Normal

OFF: Abnormal

5 Red LNA LNA alarm LED ON: There is an alarm


2.5.1.2 E Combiner Distribution Unit (ECDU)

Functions

ECDU provides the following functions:

External Interfaces

Panel Indicators


36

1. Providing bi-directional channel from BTS to the antenna for signals of the

transmitting frequency band and from the antenna to BTS for signals of the

receiving frequency band.

2. Reporting alarms when SWR of the antenna port deteriorates.

3. Suppressing interference and spurious emission beyond the working frequency

band.

ECDU Functional blocks are shown in Fig 2.5-4.

Fig 2.5-4 ECDU Functional Blocks

ECDU consists of a transceiving duplexer, VSWR detecting circuit, two LNAs (each

LNA includes one 1-to-2 splitter) and a receiver filter. It can meet diversity reception

requirements.

ECDU have four types of panels:

1. ECDUG (GSM 900 / EGSM 900)

2. ECDUD (GSM 1800)

3. ECDUC (GSM 850)

4. ECDUP (GSM 1900)

Functional Blocks

ECDU Panel


37

All the ECDUs have same panel. Fig 2.5-5 shows the ECDU panel.

Fig 2.5-5 ECDU panel

ECDUG External Interfaces are described in Table 2.5-5.

Table 2.5-5 ECUG External Interfaces

Identification Symbol Full Name Meaning

ITX Input of Transmitter Transmission power input (power amplifier

output signal)

RTE Radio Test Equipment Radio test port

RX1 Receiver 1 Low-noise amplifier output port 1

RX2 Receiver 2 Low-noise amplifier output port 2

RXD1 Receiver for Diversity1Low-noise amplifier output port 1

(diversity)

RXD2 Receiver for Diversity2Low-noise amplifier output port 2

(diversity)

ANT Antenna Antenna feeder port

ANTD Antenna for Diversity Antenna feeder port (diversity)

External Interfaces


38

Table 2.5-6 gives a description of LEDs on ECDU panel.

Table 2.5-6 ECDU Panel LEDs

LED Position Color Name Meaning Working Mode

1 Green FPO Forward power

output LED

ON: Normal

OFF: Abnormal


LED




LED



4 Green PWR LNA power supply

LED

ON: Normal

OFF: Abnormal

5 Red LNA1 Channel 1 LNA alarmON: There is an alarm


6 Red LNA2 Channel 2 LNA alarmON: There is an alarm


2.5.1.3 Combiner Extension Unit (CEU)

By different working bands, CEU is of different types:

1. CEUG

2. CEUC

3. CEUD

4. CEUP

CEU provides various site configurations with the combination of CDU.

The CEU consists of two 2-in-1 combiners and two 1-to-2 splitters, as shown in Fig

2.5-6.

Panel Indicators

Function

Functional Blocks


39

Fig 2.5-6 CEU Functional Blocks

The CEU is combined with CDU to form a 4-in-1 combiner distribution unit.

CEU type 2 (CEU/2) has the same functions as CEU. However, its width is 10 mm less

than CEU and it uses different slot in the cabinet.

All the CEUs have the same panel.

The CEU panel is shown in Fig 2.5-7.

CEU and CEU/2 Panels


40

TX4

ERX2 OTX2

OTX1

TX3

CEUG

Fig 2.5-7 Structure of CEU Panel

The following appear on the CEU panel:

1. 2 combiner TX output ports OTX1 and OTX2

2. 4 combiner input ports TX1 - TX4 (PA output signal)

3. 4 splitter output ports RX1 - RX4

4. 2 splitter input ports ERX1 - ERX2 (LNA extended outputs)

All the CEU/2 boards have the same panel.

The CEUG/2 panel is shown in Fig 2.5-8.


41

C E U G /2

E R X 1

R X 1

T X 1

O T X 1

R X 2

E R X 2

O T X 2

T X 3

R X 3

T X 2

R X 4

T X 4

Fig 2.5-8 CEUG/2 Panel

The CEU external interfaces are described in Table 2.5-7.

Table 2.5-7 CEU External Interfaces

Identifier Meaning Description

OTX1 Output TX 1 Combiner TX output port 1

OTX2 Output TX 2 Combiner TX output port 2





RX1 Receiver 1 Splitter output port 1




ERX1 Extend Receiver 1 Splitter input port 1 (low noise amplifier extended output)

ERX2 Extend Receiver 2 Splitter input port 2 (low noise amplifier extended output)

External Interfaces


42

2.5.1.4 Combiner Extension Net Unit (CENU)

CENU performs the same functions as CEU, but supports different configurations.

CENU is of two types:

1. CENU (Supports configuration of S 9/9/9 ~ S 12/12/12)

2. CENU/2 (Supports configuration of S 5/5/5 ~ S 6/6/6)

CENU functional blocks are shown in Fig 2.5-9.

Fig 2.5-9 CENU Functional Blocks

CENU & CENU/2

Functional Blocks


43

CENU/2 functional blocks are shown in Fig 2.5-10.

Fig 2.5-10 CENU/2 Functional Blocks

All the CENUs have same panels.

CENUG panel is shown in Fig 2.5-11.

CENU, CENU/2, CENU/3 &

CENU/4 Panels


44

TX6

TX5

TX4

OTX2

RX8

RX7

ERX2

RX6

RX5

TX3

TX2RX4

RX3

TX1ERX1

RX2

OTX1RX1

CENUG

Fig 2.5-11 CENUG Panel


45

All the CENU/2 boards have same panels.

CENUG/2 panel is shown in Fig 2.5-12.

CENUG/2

OTX1

TX1

TX2

TX3

OTX2

TX4

TX6

TX5RX4

RX3

ERX2

RX2

RX1

ERX1

Fig 2.5-12 CENUG/2 Panel


46



CENUG/3

RX1

RX2

ERX1

RX3

RX4

RX5

RX6

ERX2

RX7

RX8

OTX1

TX1

TX2

TX3

OTX2

TX4

TX5

TX6



47



CENUG/4

ERX1

RX1

RX2

ERX2

RX3

RX4 TX5

TX6

TX4

OTX2

TX3

TX2

TX1

OTX1


gbc 022 e0 0 zxg10-b8018 description-51

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