BTI Wireless MBSC081921-19 Multi-Band, Multi-Standard, Multi-Carrier Coverage System (CDMA 1900) User Manual mBSC081921 12 Operation Manual Issue2

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mBSC081921-12
ISSUE 2
mBSC081921-12 Multi-Band, Multi-Standard,
Multi-Carrier Coverage System
Operation Manual
mBSC081921-12 System
Operation Manual Issue 2
COPYRIGHT
This document is the Operation Manual for Bravo Tech Inc. mBSC system. Bravo Tech Inc. reserves the
right to change the contents without prior notice. No part of this document may be reproduced or utilized.
© 2009, Bravo Tech Inc, All Rights Reserved
REVISION HISTORY
Issue No.
Description
Date
Initial Draft
Dec. 15, 2009
Update the specification
Jan. 18, 2010
TABLE OF CONTENTS
Content
Page
Introduction ...................................................................................................................... 4
Thoery of operation .......................................................................................................... 4
2.1 System Overview ..................................................................................................... 4
2.2 Basic System Components....................................................................................... 4
2.3 Host Unit Description................................................................................................ 4
2.3.1 Basic Functions of HU ................................................................................. 5
2.3.2 HU Interface Ports Description ..................................................................... 5
2.4 Remote Unit Description........................................................................................... 6
2.4.1 Basic Functions of RU ................................................................................. 8
2.4.2 RU Interface Ports Description ..................................................................... 8
2.5 Specifications ........................................................................................................... 9
Network Management system ........................................................................................ 12
3.1 Software Installation ............................................................................................... 13
3.2 System Start-Up Procedure with NMS .................................................................... 13
3.3 Read and Edit the current system setting parameters ............................................. 19
3.4 Read and Modify the System Gain Budget ............................................................. 20
3.5 Check Alarm Status for the system ......................................................................... 21
3.6 Check the Major performance for the system.......................................................... 22
antenna Mount environment........................................................................................... 23
fcc warning..................................................................................................................... 23
customer Contact information......................................................................................... 23
Figure 2-1. System Overview Structure.................................................................................... 4
Figure 2-2. Host Unit ............................................................................................................... 5
Figure 2-3. User Interface of Host Unit..................................................................................... 6
Figure 2-4. 3 Remote Unit Assembly Without Solar Shell ......................................................... 7
Figure 2-5. 3 Remote Unit Assembly With Solar Shell .............................................................. 8
Figure 2-6. User Interface of Remote Unit................................................................................ 9
Figure 3-1. User Login Window.............................................................................................. 13
Figure 3-2. Advanced User Login Window ............................................................................. 13
© 2009, Bravo Tech Inc.
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mBSC081921-12 System
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Content
Page
Figure 3-3. Network Management System Main Window ....................................................... 14
Figure 3-4. Configuration of IP Address ................................................................................. 14
Figure 3-5. System Configruation Window ............................................................................. 15
Figure 3-6. Define the District ................................................................................................ 15
Figure 3-7. Reult window after Defining District ...................................................................... 16
Figure 3-8. Add the Host Unit in the System configuration ...................................................... 16
Figure 3-9. Result Window after adding HU ........................................................................... 17
Figure 3-10. Add the Remote Unit below the Host Unit Tree................................................... 17
Figure 3-11. Completion of the System Configuration............................................................. 18
Figure 3-12. Read the current setting for teh system .............................................................. 19
Figure 3-13. Modify the parameters for the system................................................................. 19
Figure 3-14. Modify the parameters for the system................................................................. 20
Figure 3-15. Read the current Alarm Status............................................................................ 21
Figure 3-16. Change the Alarm Setting .................................................................................. 21
Figure 3-17. Check the system performance.......................................................................... 22
Table 2-1. Remote Unit User Interface ..................................................................................... 6
Table 2-2. Remote Unit User Interface ..................................................................................... 9
Table 2-3. mBSC System specifications ................................................................................... 9
Table 3-1. Rule for numbering the Equipment Code ............................................................... 18
SAFETY CAUTIONS
Danger: Danger is used to indicate the presence of a harzard that will cause server
personal injury or substantial property damage if the harzard is not abvoided.
Warning: Warning is used to indicate the presence of a harzard that can cause server
personal injury or substantial property damage if the harzard is not abvoided.
Caution: Caution is used to indicate the presence of a harzard that will or can cause
minor personal injury or substantial property damage if the harzard is not abvoided.
Glossary and Acronyms
The acronyms and abbreviations used in this manual are detailed in the following list.
mBSC
HU
RU
FIU
BIU
RCU
PSU
NMS
© 2009, Bravo Tech Inc.
Multi-Band, Multi-System, Multi-Carrier
Host Unit
Remote Unit
Fiber optic Interface Unit
Base station Interface Unit
Remote Control Unit
Power Supply Unit
Network Management System
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mBSC081921-12 System
Operation Manual Issue 2
INTRODUCTION
This document provides the basic description, application and configuration for Bravo Tech Inc.
mBSC081921-12 system. Throughout this publication,
THOERY OF OPERATION
2.1
System Overview
mBSC081921-12 is the economic and convenient coverage solution of DAS system which has a
fiber transport. The system consists of HU (Host unit) and RU (Remote unit). The HU is mounted in a
19” rack and are intend for use indoor environment. The RU can work in outdoor environment. The
output power of the RU is 40W. The transport between HU and RU is fiber optic. The downlink and
uplink optical signal are duplex so there is only one fiber needed.
2.2
Basic System Components
The basic components of Bravo Tech Inc. mBSC system and their functions are shown in Figure 2-1.
A basic mBSC system consists of a Host Unit (HU) and a Remote Unit (RI). The Host unit has
multiple slot assembly that mounts in a standard equipment rack. The RU consists of multiple
electronic and optical modules for supporting multiple Standards, which mounts in outdoor wall or
pole. Control and monitoring functions are provided by the Network Management System (NMS).
Cellular
PCS
Cellular
AWS
Remote Unit(RU)
PCS
AWS
Remote Unit(RU)
Cellular
PCS
AWS
Remote Unit(RU)
Optical Fiber
Cellular
PCS
AWS
Remote Unit(RU)
Optical Fiber
Optical Fiber
Optical Fiber
Ethernet
Host Unit
Operator NMS Server
Figure 2-1. System Overview Structure
2.3
Host Unit Description
The HU, shown in Figure 2-3, consists of RF conditioning units (BIU) and optical TRX modules (FIU).
HU combines the 3 band downlink RF signals from BTS and converters them to optical signal. At the
same time, HU converts the uplink optical signals to RF signals and splits and filters out 3 band RF
signals.
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mBSC081921-12 System
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Figure 2-2. Host Unit
2.3.1
Basic Functions of HU
HU provides the following basic functions.
•
•
•
•
2.3.2
BIU (Base station Interface Unit): RF interface module with Base Station
FIU (Fiber optic Interface Unit): Optical TRX module. Convert RF signals to Optic
signals
RCU (Remote Control Unit): Ethernet Interface module for Network Management
Software
PSU (Power Supply Unit): Power Supply unit for providing DC power to BIU, FIU and
RCU module
HU Interface Ports Description
Each interface port, shown in Figure 3, is described in below Table 1.
© 2009, Bravo Tech Inc.
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mBSC081921-12 System
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Figure 2-3. User Interface of Host Unit
Table 2-1. Host Unit User Interface
Board Name
FIU
BIU
2.4
Port Name
Description
Remark
TX1, TX2
Downlink interface ports to be
connected to BIU
RF signal
RX1, RX2
Uplink interface ports to be connected
to BIU
RF signal
FC/APC1, FC/APC2
Fiber optic interface ports to be
connected to RU
Optical signal
E911-800-1,
E911-800-2
The cellular band coupling uplink
signal for LMU
RF signal
E911-1900-1,
E911-1900-1
The PCS band coupling uplink signal
for LMU
RF signal
E911-2100-1,
E911-2100-1
The AWS band coupling uplink signal
for LMU
RF signal
TX1, TX2, TX3, TX4
The combined downlink signal to FIUs
RF signal
RX1, RX2, RX3, RX4
The combined uplink signal from FIUs
RF signal
AWS-1, AWS-2
The interface to AWS band BTS
TX/RX ports
RF signal
PSC-1, PCS-2
The interface to PCS band BTS TX/RX
ports
RF signal
Cellular -1, Cellular-2
The interface to cellular band BTS
TX/RX ports
RF signal
Remote Unit Description
The Remote Unit, shown in Figure 2-5 and Figure 2-6, consists of optical module (O/E), downlink
power amplifier, LNA and duplexer. Optical module converts the downlink optical signal from the HU
and splits the RF signal to 3 RU. It also converts the uplink RF signal to optical signal and sends it to
© 2009, Bravo Tech Inc.
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mBSC081921-12 System
Operation Manual Issue 2
the HU. Each optical module can support 3 RU in different band. The 3 RU were assembled together
as a whole.
Figure 2-4. 3 Remote Unit Assembly Without Solar Shell
© 2009, Bravo Tech Inc.
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mBSC081921-12 System
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Figure 2-5. 3 Remote Unit Assembly With Solar Shell
2.4.1
Basic Functions of RU
The RU provides the following functions:
•
•
•
2.4.2
Convert downlink optic signal to RF signal and uplink RF signal to optic signal
Booster the forward RF signal from HU to high power level (Max output: 40W / RU)
Amplify the uplink signal from antenna to improve the system receive sensitivity
RU Interface Ports Description
Each interface port of Remote Unit, shown in Figure 2-7, is described in below Table 2-2.
© 2009, Bravo Tech Inc.
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mBSC081921-12 System
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Figure 2-6. User Interface of Remote Unit
Table 2-2. Remote Unit User Interface
Label Name
ANT
RUN
SLAVE 1, 2
FIBER
POWER
AISG
VENT
2.5
Description
Interface port for Antenna Feed line
LED indicator for normal or critical fault status of RU.
Normal: Green ON, Critical fault: Red ON
RF output port to provide the input signal to Slave Remote unit when Dual or Triple
Band application
Fiber Optic Cable interface port for combined downlink and uplink signal
Interface port for the AC 220V power cable
User Defined Interface port for External Alarm. (Debug port for the default)
Port for the balance of the pressure inside and outside of the enclosure
Specifications
The specifications for the mBSC system are listed in Table 2-3.
Table 2-3. mBSC System specifications
System Specification
Downlink
Cellular
Uplink
PCS
AWS
1930 to
1990 MHz
2110 to
2155 MHz
Cellular
Frequency (MHz)
869 to
894 MHz
Max Gain (for 0 to
10dB optical loss)
43±1dB
17±1dB
Adjustable Gain Range
Adjustable Step
20dB
0.5dB
20dB
0.5dB
Output Power
0-20dBm for BIU-A; 26-46dBm for
BIU-B
+46dBm±1dB
-8dBm±1dB
Max No Damage Input
Power
Pass Band Ripple
+26dBm for BIU-A
+47dBm for BIU-B
≤±1.5 dB
Input power range
824 to
849 MHz
PCS
AWS
1850 to
1910 MHz
1710 to
1755 MHz
+10dBm
≤±1.5 dB
Noise Figure
(@17dB Gain)
N/A
≤ 2.5dB (0 dB optical loss)
≤ 2.8dB (5 dB optical loss)
≤ 3.0dB (10 dB optical loss)
Noise Figure
N/A
≤5dB (0-10dB optical loss)
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mBSC081921-12 System
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Downlink
System Specification
Cellular
Uplink
PCS
AWS
Cellular
PCS
AWS
(@6dB Gain)
Dynamic range
System delay
N/A
≤ 500ns
60dB
Optic Link Budget
Optic Wavelength
10dB (full performance) , 15dB (derate)
1310/1550nm
ALC range
VSWR
6dB
≤1.5
Antenna Port
Optical connector
7/16 DIN female
FC/APC (HU) ; LC/PC (RU)
Power Supply
Waterproof
DC -48V (HU) ; AC 110/220V (RU)
IP40 (HU) ; IP65 (RU)
NMS
Support SNMPv2
30dB
Downlink
BIU Specification
Cellular
PCS
Uplink
AWS
AWS
1850 to
1910 MHz
1710 to
1755 MHz
Max No of Plug-in
module
Input power level
Input/Output VSWR
0 ~ 20dBm for low power module, 26-46dBm for high power module
≤ 1.5
Temperature of
operation
Power supply
DC -48V
Current
Weight
< 1A @ Full power output
17Kg
Dimensions (H x W x D)
MTBF
177mm x 485mm x 445mm
100 , 000 Hours
No of BTS interface/per
band
Max No of divided
output
4/per module
RF Port
NMS Interface
SMA
Ethernet
824 to
849 MHz
PCS
869 to
1930 to
894 MHz
1990 MHz
6 for low power (BIU-A)
3 for High power (BIU-B)
Frequency (MHz)
2110 to
2155 MHz
Cellular
-40˚C ~ +60˚C
Optical module (FIU) specification
Specification
Optical Output Power
1310 ± 20nm (HU)
1550 ± 20nm (RU)
4dBm ± 2dB
Optical Input Power
Tx Alarm
-18 ~ 6dBm
optical output power < -3dBm
Rx Alarm
WDM
Optical input power < -15dBm
Embedded
Fiber Connector
Frequency
FC/APC
700 ~ 2200MHz
Optical Wavelength
Flatness
0 ± 2dB (Uplink , Downlink) @ 0 ~ 10dB
fiber loss
≤ 1dB in each band
VSWR
≤ 1.4
Link Gain
© 2009, Bravo Tech Inc.
Notes
Software setting
Software setting
Default
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mBSC081921-12 System
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Optical module (FIU) specification
Specification
Notes
Third-order Intermodulation
Noise
≤ -65dBc (0dBm/2 tone)
≤ -134dBm/Hz (RF Gain: 0dB)
RF Isolation
Spurious
≥ 60dB
≤ -60dBm / 100KHz (100MHz ~ 3GHz)
Delay
Temperature of operation
60ns
-20 ~ +65˚C
Current
≤ 200mA/per module (+12V Power Supply)
DC +5.6V ~ +15V , Power Consumption: <
2.5W
RS232 and RS485 Interface
Data Rate: Software Setting
Power Supply
Communication Interface
NMS Specification
Specification
Max No of port
30 (manage 30 BIU rack or FIU rack ,
Remote unit)
SNMP based management
yes
Web browser
yes
Real time alarm display
yes
Display various system level values
yes
Remote download
yes
ACPR
Spurious Emission
1080
Voltages ,
RF power etc.
Cellular Band Remote Unit Specification
Frequency
Output Power
Notes
Downlink
869 to 894 MHz
+46dBm±1dB
|∆f| ≥750kHz
≥ 45dBc / 30kHz
|∆f| ≥1.98MHz
≥ 60dBc / 30kHz
90kHz < f < 150kHz
150kHz < f < 30MHz
≤ -13dBm / 1kHz
≤ -13dBm / 10kHz
30MHz< f < 1GHz
1GHz < f < 5GHz
≤ -13dBm / 100kHz
≤ -13dBm / 1MHz
Uplink
824 to 849 MHz
-8dBm±1dB
N/A
≤ 2.5dB
30dB
Noise figure
ALC range
N/A
6dB
VSWR
ANT port
Optical interface (master RU only)
≤1.5:1
7/16 female
LC/PC
Temperature of operation
Power supply
-40 ~ +60˚C
AC 110V / 220V ± 20%
Current
Weight
< 1A @ Full power, 110VAC / 220VAC input
16Kg
Dimensions (H x W x D)
Weatherproof
120mm x 250mm x 500mm
IP65
MTBF
NMS Interface
100,000 Hours
Ethernet
PCS Band Remote Unit Specification
Frequency (MHz)
© 2009, Bravo Tech Inc.
Downlink
1930 to 1990
Uplink
1850 to 1910
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mBSC081921-12 System
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PCS Band Remote Unit Specification
Output Power
ACPR
Spurious Emission
Downlink
+46dBm±1dB
|∆f| ≥885kHz
≥ 45dBc / 30kHz
|∆f| ≥1.25 to 2.25MHz
|∆f| ≥2.25 to 4MHz
≤-9dBm / 30kHz
≤-13dBm / 1MHzHz
9kHz < f < 150kHz
150kHz < f < 30MHz
≤ -13dBm / 1kHz
≤ -13dBm / 10kHz
30MHz < f < 1GHz
1GHz < ∆f < 5GHz
≤ -13dBm / 100kHz
≤ -13dBm / 1MHzkHz
N/A
6dB
VSWR
ANT port
≤ 1.5:1
7/16 female
Optical interface (master RU only)
Temperature of operation
LC/PC
-40 ~
Power supply
Current
AC 110V / 220V ± 20%
<1A @ Full power
Weight
Dimensions (H x W x D)
16Kg
120mm x 250mm x 500mm
Weatherproof
MTBF
IP65
100,000 Hours
NMS Interface
Ethernet
Frequency (MHz)
Output Power
ACLR
Spurious Emission
Downlink
|∆f| ≥5MHz
≥ 45dBc / 30kHz
|∆f| ≥10MHz
9kHz < f < 150kHz
≥ 50dBc / 30kHz
≤ -13dBm / 1kHz
1GHz < f < 5GHz
5GHz < f < 12.75GHz
N/A
+60 ˚C
2110 to 2155
+46dBm±1dB
150kHz < f <
30MHHz
30MHz < f < 1 GHz
-8dBm±1dB
≤ 2.5dB
30dB
Noise figure
ALC
AWS Band Remote Unit Specification
Uplink
≤ -13dBm / 10kHz
Uplink
1710 to 1755
-8dBm±1dB
N/A
≤ -13dBm / 100kHz
≤ -13dBm / 1MHz
≤ -30dBm / 1MHz
≤ 2.5dB
30dB
Noise figure
ALC range
N/A
6dB
VSWR
ANT port
≤ 1.5:1
7/16 female
Optical interface (master RU only)
Temperature of operation
LC/PC
-40 ~ +60 ˚C
Power supply
Current
AC 110V / 220V ±20%
< 1A @ Full power, 110V AC / 220VAC input
Weight
Dimensions (H x W x D)
16Kg
120mm x 250mm x 500mm
Weather proof
MTBF
IP65
100,000 Hours
NMS Interface
Ethernet
NETWORK MANAGEMENT SYSTEM
© 2009, Bravo Tech Inc.
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mBSC081921-12 System
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The Network Management System (NMS) is a software-based network management tool that
provides control and monitoring function for Bravo Tech Inc. mBSC system. NMS is used to
provision and configure new system for operation, set the system operating parameters, get system
alarms and status messages and upgrade the system software.
3.1
Software Installation
NMS software CD-ROM will be provided to the customer with product package. Software installation
consists of inserting CD-ROM in the server system of the customer.
3.2
System Start-Up Procedure with NMS
1. Open the NMS software. The NMS Log-In window will open as shown in Figure 3-1 and Figure
3-2. For setting or changing system operating parameters, the advanced login is required. (Check
the box left side of “Advance” for advanced user.)
Caution: To configure the system and set the system paremeters, it should be required
to log in as Advanced User.
Figure 3-1. User Login Window
Figure 3-2. Advanced User Login Window
2. Enter the user name and password for login, the main window will open as shown in Figure 3-3.
© 2009, Bravo Tech Inc.
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mBSC081921-12 System
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Figure 3-3. Network Management System Main Window
3. Open the Config drop down menu and select Config Port. Or click the Config Port icon menu.
Configure the server IP address and port. This IP address should be same with the server IP
address and port. The New window will open for setting IP address as shown in Figure 3-4.
Figure 3-4. Configuration of IP Address
4. After configuring the IP address, the system configuration is required for Host Units and Remote
Units. Open the Net Manager drop down menu and select “Net Manager”. Or click the Net icon
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mBSC081921-12 System
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menu. The new window for the system configuration will open as shown in Figure 3-5.
Figure 3-5. System Configruation Window
5. Define the District for highest level of system configuration as shown in Figure 3-6. User can
define each section without rules. After typing the information, click the Add button right-bottom
of the window. Figure 3-7 shows the result after defining the district
Province
(Country or State
District Caption
(Area or City)
District Code
Figure 3-6. Define the District
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mBSC081921-12 System
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Figure 3-7. Reult window after Defining District
6. After configuring the District, the equipment should be defined. Check the Equipment title and
new information sections will be appeared as shown in Figure 3-8. Host Unit should be defined
first before adding Remote unit. Check the MU title and type the information for Host Unit. After
filling the information, click the Add button. Figure 3-9 shows the result for adding Host Unit in the
system configuration.
Figure 3-8. Add the Host Unit in the System configuration
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mBSC081921-12 System
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Caution: When the system was shipped out, the IP address was pre-defined with
default. The customer should changed HU IP address with user defined one.
•
Note: the IP address of Host Unit is pre-defined when the product is shipped to the
customer. The customer can change the default IP address of HU to user defined IP
address.
Figure 3-9. Result Window after adding HU
7. After adding Host Unit, Remote units are required to add in the system configuration with same
way for adding HU, as shown in Figure 3-10.
Figure 3-10. Add the Remote Unit below the Host Unit Tree
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mBSC081921-12 System
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There is the rule to define the Equipment Code for Remote Unit.
Warning: Equipment Code for RU should be followed the numbering rule for normal
operation. The conflicted Cdoe may casue for the failure of configuration of the system.
•
The code will be defined with the combination of Slot ID and Port number for FIU
module in Host Unit as shown in Table 3-1. Maximum 6 FIU modules can be installed in
one HU. And the slot number is started with “1” from the left side module to right side
module.
Table 3-1. Rule for numbering the Equipment Code
FC/APC1
FC/APC2
Slot #1
Slot #2
Slot #3
Slot #4
Slot #5
Slot #6
RU
Information
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Note
1.
Slot # is numbered sequentially starting “1” from left side slot in HU
8. Figure 3-11 shows the completion of the system configuration and adding Host unit and Remote
Units in NMS.
Figure 3-11. Completion of the System Configuration
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mBSC081921-12 System
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3.3
Read and Edit the current system setting parameters
The User can check the current setting values for the system parameter and edit or modify the
parameters for Host Units and Remote Units. The Figure 3-12 and 3-13 shows how to read the
current setting parameters and edit the parameters for Host Unit. Remote unit has the same
procedure to read and modify the parameters
Figure 3-12. Read the current setting for teh system
Figure 3-13. Modify the parameters for the system
© 2009, Bravo Tech Inc.
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mBSC081921-12 System
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3.4
Read and Modify the System Gain Budget
The User can read the current setting value for the system gain budget of downlink and uplink. The
parameters can be read for each HU and RU. Also the User can modify the gain budget for downlink
and uplink for whole HU and RU system or for individual Host Unit and Remote Unit. The Figure
3-14 shows the current parameter setting for the system gain budget and the procedure of modifying
the parameter.
Figure 3-14. Modify the parameters for the system
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mBSC081921-12 System
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3.5
Check Alarm Status for the system
The User can check the current alarm status for Host Unit and Remote Unit with NMS. The Figure
3-15 shows how to read the current alarm status. Also the User can make enable or disable for each
alarms for required purpose as shown Figure in 3-16.
Figure 3-15. Read the current Alarm Status
Figure 3-16. Change the Alarm Setting
© 2009, Bravo Tech Inc.
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mBSC081921-12 System
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3.6
Check the Major performance for the system
The User can check the current status of the HU and RU for major items that is related with main
system performance like downlink output power, temperature of unit and so on. The Figure 3-17
shows the main performance of the system in one window.
Figure 3-17. Check the system performance
© 2009, Bravo Tech Inc.
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mBSC081921-12 System
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ANTENNA MOUNT ENVIRONMENT
The effective radiated power (ERP) limits and power & antenna height limits are related with the
distance between operating area and international borders, average distance to the service area
boundary, population densities, emission bandwidth, base stations location, different operation
frequency band. The antenna for this system is provided and assembled by customer. Customer
should follow FCC certification section 22, 24 and 27 when assembled their antenna on this system.
FCC WARNING
Any Changes or modifications not expressly approved by the party responsible for compliance could void
the user's authority to operate the equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation.
IMPORTANT NOTE:
FCC Radiation Exposure Statement:
This equipment complies with FCC radiation exposure limits set forth for an controlled environment .
This equipment should be installed and operated with minimum distance 400 cm between the radiator & your
body
CUSTOMER CONTACT INFORMATION
USA
Bravo Tech Inc.
6185 Phyllis Dr. Unit D. Cypress, CA 90630, USA
Tel: +1 714-230-8333
Fax: +1 714-230-8341
E-mail:
Customer Service: CustomerService@bravotechinc.com
Sales: sales@bravotechinc.com
China
Bravo Tech (Shenzhen) Co., Ltd.
No.8 Building, Zone #3, Tangtou Industrial Park,
Shiyan, Baoan District, Shenzhen, Guangdong
P.R.China 518102
Tel: +86 755-2951-2233
Fax: +86 755-2951-2299
E-mail: chinasales@bravotechinc.com
© 2009, Bravo Tech Inc.
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