GBC 022 E0 0 ZXG10-B8018 Description-51
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Transcript of GBC 022 E0 0 ZXG10-B8018 Description-51
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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
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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
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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
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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
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GBC_022_E0_0 ZXG10-B8018 Description
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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
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Chapter 1 Cabinet and Shelves
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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
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GBC_022_E0_0 ZXG10-B8018 Description
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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
Pin No. Signal Name Signal Definition Connector
1 TA-PWR0 TMA power 0
2 TA-PWR1 TMA power 1
3 TA-PWR2 TMA power 2
4 TA-PWR3 TMA power 3
5 AGND Analog ground
6 AGND TMA power 0 analog ground
7 AGND TMA power 1 analog ground
8 AGND TMA power 2 analog ground
9 AGND TMA power 3 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
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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
Pin No. Signal Name Signal Definition Connector
1 ALM_IN0+ Dry contact input
2 ALM_IN0- Dry contact input
3 ALM_IN2+ Dry contact input
4 ALM_IN2- Dry contact input
5 ALM_IN4+ Dry contact input
6 ALM_IN4- Dry contact input
7 ALM_IN6+ Dry contact input
8 ALM_IN6- Dry contact input
9 ALM_IN8+ Dry contact input
10 ALM_IN8- Dry contact input
11 ALM_IN9+ Dry contact input
12 ALM_IN9- Dry contact input
13 ALM_OUT0+ Dry contact output
14 ALM_OUT0- Dry contact output
15 ALM_OUT2+ Dry contact output
DB25
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GBC_022_E0_0 ZXG10-B8018 Description
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Pin No. Signal Name Signal Definition Connector
16 ALM_OUT2- Dry contact output
17 ALM_IN1+ Dry contact input
18 ALM_IN1- Dry contact input
19 ALM_IN3+ Dry contact input
20 ALM_IN3- Dry contact input
21 ALM_IN5+ Dry contact input
22 ALM_IN5- Dry contact input
23 ALM_IN7+ Dry contact input
24 ALM_IN7- Dry contact input
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
Pin No. Signal Name Signal Definition Connector
1 ID0 Bit 0 of the site ID
2 ID1 Bit 1 of the site ID
3 ID2 Bit 2 of the site ID
4 ID3 Bit 3 of the site ID
5 ID4 Bit 4 of the site ID
6 ID5 Bit 5 of the site ID
7 ID6 Bit 6 of the site ID
8 ID7 Bit 7 of the site ID
9 ID8 Bit 8 of the site ID
10 ID9 Bit 9 of the site ID
11 ID10 Bit 10 of the site ID
12 ID11 Bit 11 of the site ID
13 ID12 Bit 12 of the site ID
14 ID13 Bit 13 of the site ID
15 ID14 Bit 14 of the site ID
16 ID15 Bit 15 of the site ID
17 DGND Digital ground
18 - -
19 - -
DB25
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Pin No. Signal Name Signal Definition Connector
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
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GBC_022_E0_0 ZXG10-B8018 Description
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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
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Chapter 1 Cabinet and Shelves
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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
Pin No. Signal Name Signal Definition Connector
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
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GBC_022_E0_0 ZXG10-B8018 Description
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Pin No. Signal Name Signal Definition Connector
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
Pin No. Signal Name Signal Definition Connector
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
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Pin No. Signal Name Signal Definition Connector
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
Pin No. Signal Name Signal Definition Connector
1 - -
2 - -
3 DGND Digital ground
4 SYNCLKIN+ SYNCLK input
5 DGND Digital ground
6 SYNCLK0+ SYNCLK output
7 DGND Digital ground
8 SYNCLK1+ SYNCLK output
9 DGND Digital ground
10 SYNCLK2+ SYNCLK output
11 - -
12 - -
13 - -
14 - -
15 - -
16 DGND Digital ground
17 SYNCLKIN- SYNCLK input
18 DGND Digital ground
19 SYNCLK0- SYNCLK output
20 DGND Digital ground
21 SYNCLK1- SYNCLK output
22 DGND Digital ground
23 SYNCLK2- SYNCLK output
24 - -
25 - -
DB25
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GBC_022_E0_0 ZXG10-B8018 Description
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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
Pin No. Signal Name Signal Definition Connector
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
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Chapter 1 Cabinet and Shelves
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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
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GBC_022_E0_0 ZXG10-B8018 Description
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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
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Chapter 1 Cabinet and Shelves
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
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GBC_022_E0_0 ZXG10-B8018 Description
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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.
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Chapter 2 Boards, Modules and Switches
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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
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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.
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Chapter 2 Boards, Modules and Switches
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.
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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.
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Chapter 2 Boards, Modules and Switches
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
2.2.2 Functional Diagram
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.
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GBC_022_E0_0 ZXG10-B8018 Description
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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.
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Chapter 2 Boards, Modules and Switches
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.
2.3.2 Functional Diagram
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
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GBC_022_E0_0 ZXG10-B8018 Description
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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
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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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GBC_022_E0_0 ZXG10-B8018 Description
28
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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Chapter 2 Boards, Modules and Switches
29
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.
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GBC_022_E0_0 ZXG10-B8018 Description
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
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Chapter 2 Boards, Modules and Switches
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Unit Name Module Name Working Frequency
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
CENUG/3 Rx880 MHz ~915 MHz Tx925 MHz ~960 MHz
CENUD/3 Rx1710 MHz ~1785 MHz Tx1805 MHz ~1880 MHz
CENUC/3 Rx824 MHz ~ 849 MHz Tx869 MHz~894 MHz
CENUP/3 Rx1850 MHz~1910 MHz Tx1930 MHz~1990 MHz
CENUG/4 Rx880 MHz ~915 MHz Tx925 MHz ~960 MHz
CENUD/4 Rx1710 MHz ~1785 MHz Tx1805 MHz ~1880 MHz
CENUC/4 Rx824 MHz ~ 849 MHz Tx869 MHz~894 MHz
CENU
CENUP/4 Rx1850 MHz~1910 MHz Tx1930 MHz~1990 MHz
ECDU ECDUG Rx890 MHz ~915 MHz Tx935 MHz ~960 MHz
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GBC_022_E0_0 ZXG10-B8018 Description
32
Unit Name Module Name Working Frequency
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
8.Two 1-to-2 Splitter 90 mm 5th
CENU/3 9. Two 3-to-1 Combiner
10.Two 1-to-4 Splitter 80 mm 5th
CENU/4 11.Two 3-to-1 Combiner
12.Two 1-to-2 Splitter 80 mm 5th
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
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Chapter 2 Boards, Modules and Switches
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
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GBC_022_E0_0 ZXG10-B8018 Description
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)
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Chapter 2 Boards, Modules and Switches
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)
TX2 Transmitter 2 Combiner input 2 (PA output signal)
RX1 Receiver 1 Low noise amplifier output port 1
RX2 Receiver 2 Low noise amplifier output port 2
RX3 Receiver 3 Low noise amplifier output port 3
RX4 Receiver 4 Low noise amplifier output port 4
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
3 Red SWR2 VSWR level-2 alarm
LED
ON: There is an alarm
OFF: There is no alarm
4 Green PWR LNA power supply
LED
ON: Normal
OFF: Abnormal
5 Red LNA LNA alarm LED ON: There is an alarm
OFF: There is no alarm
2.5.1.2 E Combiner Distribution Unit (ECDU)
Functions
ECDU provides the following functions:
External Interfaces
Panel Indicators
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GBC_022_E0_0 ZXG10-B8018 Description
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
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Chapter 2 Boards, Modules and Switches
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
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GBC_022_E0_0 ZXG10-B8018 Description
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
2 Red SWR1 VSWR level-1 alarm
LED
ON: There is an alarm
OFF: There is no alarm
3 Red SWR2 VSWR level-2 alarm
LED
ON: There is an alarm
OFF: There is no alarm
4 Green PWR LNA power supply
LED
ON: Normal
OFF: Abnormal
5 Red LNA1 Channel 1 LNA alarmON: There is an alarm
OFF: There is no alarm
6 Red LNA2 Channel 2 LNA alarmON: There is an alarm
OFF: There is no 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
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Chapter 2 Boards, Modules and Switches
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
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GBC_022_E0_0 ZXG10-B8018 Description
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.
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Chapter 2 Boards, Modules and Switches
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
TX1 Transmitter 1 Combiner input 1 (PA output signal)
TX2 Transmitter 2 Combiner input 2 (PA output signal)
TX3 Transmitter 3 Combiner input 3 (PA output signal)
TX4 Transmitter 4 Combiner input 4 (PA output signal)
RX1 Receiver 1 Splitter output port 1
RX2 Receiver 2 Splitter output port 2
RX3 Receiver 3 Splitter output port 3
RX4 Receiver 4 Splitter output port 4
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
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GBC_022_E0_0 ZXG10-B8018 Description
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
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Chapter 2 Boards, Modules and Switches
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
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GBC_022_E0_0 ZXG10-B8018 Description
44
TX6
TX5
TX4
OTX2
RX8
RX7
ERX2
RX6
RX5
TX3
TX2RX4
RX3
TX1ERX1
RX2
OTX1RX1
CENUG
Fig 2.5-11 CENUG Panel
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Chapter 2 Boards, Modules and Switches
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
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GBC_022_E0_0 ZXG10-B8018 Description
46
All the CENU/3 boards have same panels.
CENUG/3 panel is shown in Fig 2.5-13.
CENUG/3
RX1
RX2
ERX1
RX3
RX4
RX5
RX6
ERX2
RX7
RX8
OTX1
TX1
TX2
TX3
OTX2
TX4
TX5
TX6
Fig 2.5-13 CENUG/3 Panel
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Chapter 2 Boards, Modules and Switches
47
All the CENU/4 boards have same panels.
CENUG/4 panel is shown in Fig 2.5-14.
CENUG/4
ERX1
RX1
RX2
ERX2
RX3
RX4 TX5
TX6
TX4
OTX2
TX3
TX2
TX1
OTX1
Fig 2.5-14 CENUG/4 Panel