Comba Telecom RX-4122 User manual

UHF PUBLIC SAFETY
BI-DIRECTIONAL
AMPLIFIER
USER MANUAL
Public Safety BDA RX-4122 Class A & Class B
QE: 1-0-1
Comba Telecom Ltd.
CriticalPoint Public Safety BDA

INSTALLATION GUIDE FOR RX-4122
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The information contained herein is the responsibility of and is approved by the
following, to whom all enquiries should be directed:
This is an unpublished work the copyright in which vests in Comba International
("Comba"). All rights reserved.
The information contained herein is confidential and the property of Comba and is
supplied without liability for errors or omissions. No part may be reproduced,
disclosed or used except as authorized by contract or other written permission. The
copyright and the foregoing restriction on reproduction and use extend to all media
in which the information may be embodied.

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0.1 CONTENTS
Section
Page
0.1 CONTENTS.................................................................................................................................3
0.2 INDEX TO FIGURES AND TABLES .........................................................................................5
0.3 HISTORY.....................................................................................................................................6
0.4 GLOSSARY OF TERMS............................................................................................................7
0.5 SAFETY NOTICES AND ADMONISHMENTS .........................................................................8
1GENERAL INFORMATION........................................................................................................9
2EQUIPMENT DESCRIPTION..................................................................................................10
2.1 FUNCTIONAL BLOCK DIAGRAM...........................................................................................10
2.2 EQUIPMENT LAYOUT.............................................................................................................11
2.3 EQUIPMENT CONSTITUTION................................................................................................12
3INSTALLATION.........................................................................................................................13
3.1 WARNINGS AND ALERTS......................................................................................................13
3.2 SITE PLANNING CONSIDERATIONS....................................................................................14
3.2.1 SITE PLANNING.......................................................................................................................14
3.2.2 INSTALLATION CHECKLIST...................................................................................................15
3.3 INSTALLATION PROCEDURES.............................................................................................16
3.3.1 GOODS INWARDS INSPECTION...........................................................................................16
3.3.2 TOOLS.......................................................................................................................................16
3.3.3 PREPARATION.........................................................................................................................16
3.3.4 WALL MOUNTING....................................................................................................................17
3.3.5 DRIP-LOOP...............................................................................................................................17
3.4 EQUIPMENT CONNECTORS.................................................................................................18
3.4.1 PS BDA CONNECTORS..........................................................................................................18
3.4.2 PS BDA LED Indicators............................................................................................................20
3.4.3 GROUNDING CONNECTION..................................................................................................20
3.4.4 RF CABLE CONNECTION.......................................................................................................20
3.4.5 ETHERNET CONNECTION.....................................................................................................20
3.4.6 DRY CONTACT CABLE CONNECTION ................................................................................21
4COMMISSIONING....................................................................................................................23
4.1 PRE-COMMISSIONING TASKS..............................................................................................23
4.2 COMMISSIONING PROCEDURE...........................................................................................24
5WEB GUI...................................................................................................................................26
5.1 WEB GUI CONNECTION.........................................................................................................26
5.2 WEB GUI INTRODUCTION.....................................................................................................27
5.2.1 [DEVICES].................................................................................................................................27
5.2.2 [COMMISSIONING]..................................................................................................................29
5.2.3 [FIRMWARE].............................................................................................................................29
5.2.4 [MANAGEMENT].......................................................................................................................31
5.3 COMMISSIONING PROCEDURE...........................................................................................41
6MAINTENANCE........................................................................................................................48
7APPENDICES...........................................................................................................................49
7.1 APPENDIX A:............................................................................................................................49
7.2 APPENDIX B: TOOLS..............................................................................................................51

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7.3 APPENDIX C: DECLARATION OF HARMFUL SUBSTANCES AND CONTENT...............52
7.4 APPENDIX D: RMA (RETURN MATERIAL AUTHORIZATION)...........................................53

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0.2 INDEX TO FIGURES AND TABLES
Figure 1: Front, Side and Bottom Views of the PS BDA Enclosure................................................................ 9
Figure 2: PS BDA Functional Block Diagram............................................................................................... 10
Figure 3: Layout of the PS BDA.................................................................................................................. 11
Figure 4: Mounting Rack Overview............................................................................................................. 16
Figure 5: PS BDA Wall Mounting................................................................................................................ 17
Figure 6: Equipment Connectors................................................................................................................. 18
Figure 7: Commissioning Procedure........................................................................................................... 24
Figure 8: Input IP Address .......................................................................................................................... 26
Figure 9: Input Domain Name..................................................................................................................... 26
Figure 10: Input User Name and Password................................................................................................. 26
Figure 11: Web GUI Main Screen............................................................................................................... 27
Figure 12: Overview Screen........................................................................................................................ 27
Figure 13: 400MHz Screen 1...................................................................................................................... 28
Figure 14: 400MHz Screen 2...................................................................................................................... 28
Figure 15: 400MHz Screen......................................................................................................................... 29
Figure 16: [Commissioning] Screen ............................................................................................................ 29
Figure 17: [Firmware] Screen –MCU Firmware Upgrade............................................................................ 30
Figure 18: [Firmware] Screen –Firmware Swap.......................................................................................... 30
Figure 19: [Firmware] Screen –Module Update.......................................................................................... 30
Figure 20: [Management] Screen................................................................................................................ 31
Figure 21: Management –Import & Export.................................................................................................. 32
Figure 22: Management –IP Setting........................................................................................................... 33
Figure 23: Management –Comm. Setting................................................................................................... 34
Figure 24: Management –Security............................................................................................................. 35
Figure 25: Modify Password........................................................................................................................ 36
Figure 26: Management –Device Reset..................................................................................................... 36
Figure 27: Management –Device Info ........................................................................................................ 37
Figure 28: Management –Isolation............................................................................................................. 37
Figure 29: Management –RF Setting ......................................................................................................... 38
Figure 30: Management –Alarm Setting..................................................................................................... 38
Figure 31: Management –Report ............................................................................................................... 39
Figure 32: Management –Alarm Log.......................................................................................................... 39
Figure 33: Management –Clear History Alarm............................................................................................ 40
Figure 34: Commissioning Procedure –Start.............................................................................................. 41
Figure 35: Commissioning Procedure –Site Info. Setting............................................................................ 41
Figure 36: Device Information Setting......................................................................................................... 42
Figure 37: Device Sub Band Setting-Class A.............................................................................................. 42
Figure 38: Channel parameters setting-Class A .......................................................................................... 43
Figure 39: Device sub-band setting-Class B................................................................................................ 44
Figure 40: Commissioning Procedure –Isolation Detection......................................................................... 44
Figure 41: Commissioning Procedure –Isolation Detection Confirm............................................................ 45
Figure 42: Commissioning Procedure –Isolation Detection Failed .............................................................. 45
Figure 43: Commissioning Procedure –Isolation Detection Finish............................................................... 46
Figure 44: Commissioning Procedure –Center Frequency Setting.............................................................. 46
Figure 45: Commissioning Procedure –Channel Number Setting ............................................................... 46
Figure 46: Commissioning Procedure –Finish............................................................................................ 47
Table 1: Equipment Connectors.................................................................................................................. 19
Table 2: LED Indicators .............................................................................................................................. 20
Table 3: Pin Definition of Dry Contact Cable ............................................................................................... 21
Table 4: Commissioning Task Explanation.................................................................................................. 25

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0.3 HISTORY
Change No.
ENU
Details Of Change
1
1-0-0
This manual first created and issued in Jan. 2018.
2
1-0-1
Update to add the part for Class B in
.

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0.4 GLOSSARY OF TERMS
Abbreviation
Definition
ALC
Automatic Level Control
ATT
Attenuator
BTS
Base Transceiver Station
CH
Channel
CSA
Cross Sectional Area
dB
Decibel
dBm
Decibels relative to 1 milliwatt
DL
Downlink
DT
Donor Terminal
DPX
Duplexer
FS
Frequency Selection
Hz
Hertz
ID
Identification
IF
Intermediate Frequency
LNA
Low Noise Amplifier
LOS
Line-of-Sight
MCU
Main Control Unit
MHz
Megahertz
MT
Mobile Terminal
MTBF
Mean Time Between Failures
NF
Noise Figure
OMC
Operation & Maintenance Center
OMT
Operation & Maintenance Terminal
PA
Power Amplifier
PLL
Phase Locked Loop
PSU
Power Supply Unit
RF
Radio Frequency
SMA
Sub-Miniature A Connector
UL
Uplink
VAC
Volts Alternating Current
VDC
Volts Direct Current
VSWR
Voltage Standing Wave Ratio

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0.5 SAFETY NOTICES AND ADMONISHMENTS
This document contains safety notices in accordance with appropriate standards. In the interests of conformity
with the territory standardsfor the country concerned, the equivalent territorial admonishmentsare also shown.
Any installation, adjustment, maintenance and repair of the equipment must only be carried out by trained,
authorized personnel. At all times, personnel must comply with any safety notices and instructions.
Specific hazards are indicated by symbol labels on or near the affected parts of the equipment. The labels
conform to international standards, are triangular in shape, and are colored black on a yellow background. An
informative text label may accompany the symbol label.
Hazard labeling is supplemented by safety noticesin the appropriate equipment manual. These notices contain
additional information on the nature of the hazard and may also specify precautions.
Note: The grantee is not responsible for any changes or modifications not expressly approved by the party
responsible for compliance. Such modifications could void the user’s authority to operate the equipment.
For compliance with the general population RF exposure limits, each individual antenna used for this
transmitter must be installed to provide a separation distance greater than 60.62cm or more from all persons
during normal operation and must not be co-located with any other antenna for meeting RF exposure
requirements.
Warning Notices:
These draw the attention of personnel to hazards that may cause death or injury to the operator or others.
Examples of use are cases of high voltage, laser emission, toxic substances, point of high temperature, etc.
WARNING. This is NOT a CONSUMER device. It is designed for installation by FCC LICENSEES and
QUALIFIED INSTALLERS. You MUST have an FCC LICENSE or express consent of an FCC Licensee to
operate this device. The PS BDA can be configured as Class A or Class B Signal Booster. You MUST
register Class B signal boosters (as defined in 47 CFR 90.219) online at
www.fcc.gov/signal-boosters/registration. Unauthorized use may result in significant forfeiture
penalties, including penalties in excess of $100,000 for each continuing violation.
Note: The grantee is not responsible for any changes or modifications not expressly approved by the party
responsible for compliance. Such modifications could void the user’s authority to operate the equipment.
Alert: These draw the attention of personnel to hazardsthat may cause damage to the equipment. Anexample
of use is the case of static electricity hazard.
Caution notices may also be used in the handbook to draw attention to matters that do not constitute a risk of
causing damage tothe equipment but where there is a possibility of seriously impairingits performance, e.g.by
mishandling or gross maladjustment.Warnings and Cautions within the main text do notincorporate labels and
may be in shortened form.
Disconnection of the 2 RF connectors may cause damage to the equipment when power is on.
The application antenna and RF cable are not provided.
WARNING!
Use only authorized and approved antennas, cables and/or coupling devices! The use of unapproved antennas,
cables or coupling devices could cause damage and may be of violation of FCC regulations. The use of
unapproved antennas, cables and/or coupling devices is illegal under FCC regulations and may subject the
user to fine.
End of Section

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1 GENERAL INFORMATION
The RX-4122 is a new digital public safety Bi-Directional repeater (hereafter referred to as PS BDA) designed
to protect the lives of first responders and building occupants. Through the use of digital filtering technology,
the RX-4122 helps eliminate adjacent channel interference to allow band selectivity and support 400MHz
rebanding.
Main Features
PS UHF 400MHz.
Support 32 channels total (Class A) or dual sub-bands(Class B).
Channel selective or band selective, software programmable.
Auto diagnostic.
Uplink squelch, per channel (Class A).
User adjustable gain control (AGC), UL and DL independent per channel.
Built in isolation testing (Mandatory prior to commissioning the PS BDA).
Easy commissioning and setup via Web-based GUI.
Weatherproof enclosure, IP65/NEMA4X.
Fully compliant with the 2016 NFPA 1221 Code, FCC and UL standard.
Low power consumption: less than 85W
Weight: 77 lbs (not including mounting bracket and duplexers)
Alarming output to supervised circuits for: antenna failure, signal booster failure, and etc.
The following figure shows the enclosure of the PS BDA.
390 315
270
800
Figure 1: Front, Side and Bottom Views of the PS BDA Enclosure

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2 EQUIPMENT DESCRIPTION
2.1 FUNCTIONAL BLOCK DIAGRAM
Mobile
Ant
Donor
Ant
Mobile
Power
Supply
Alarm
Indicator Main Control Unit
OMT
LAN
DT MT
BTS
DL Subband 01
BIAS
Tee
DL Subband 02 PA
PA
DL_01
DL_02
UL_01
UL_02
DL_01
DL_02
UL Subband 01
UL Subband 02
UL_01
UL_02
Digital
Integrated
module
LNA
DL_01
DL_02
LNA
UL_01
UL_02
DL_01
DL_02
UL_01
UL_02
Figure 2: PS BDA Functional Block Diagram
In the downlink path,the BTS signals are received bythe donor antenna of therepeater.Afterthe circulator, the
signals are sent to downlink filter and then the LNA module for pre-amplification and to the digital RF integrated
module for digital filtering and frequency conversion. Then the DL signals will be sent to the downlink PA to
amplify power, and filter via downlink filter, the circulator, and last, the signals are transmitted at the MT port to
the service antenna.
In the uplink path, the mobile signals are received by the service antenna. After the circulator, the signals are
sent to uplink filter, and then to LNA, digital integrated module for digital filtering, then to the PA for power
amplification and to the uplinkfilter, the circulator, after that, the uplink signals are sent to the donor antennafor
transmission back to the BTS.

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2.2 EQUIPMENT LAYOUT
Shown below is the internal layout of the PS BDA.
黑色开关
MT
DT
避雷器
DL FilterUL Filter
DL FilterUL Filter
DT
/DL IN MT /DL OUT UL IN UL OUT
Front Side of 3rd Layer
(Passive Unit)
Back Side of 2nd
Layer
Front Side of 2nd Layer
(Passive Unit)
Loop
Circulator
Circulator
UL Filter DL Filter
DL FilterUL Filter
PSU
Distribution
Board MCU
+28V
+28V
GND
RF OUT
RF IN
+28V
GND
RF OUT
RF IN
DL PA
Digital Integrated
Module
+28V
Ref IN
LNA1 OUT
LNA1 IN
LNA2 IN
LNA2 OUT
UL IN
UL OUT
DL OUT
DL IN
UL PA
OUT4
IN4
OUT3IN3OUT2
IN2
OUT1
IN1
LAN
RUN
ALM
PWR
OMT
Figure 3: Layout of the PS BDA

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2.3 EQUIPMENT CONSTITUTION
The typical PS BDA unit consists of the following components:
Downlink Power Amplifier (DPA): It provides power amplification for DL branches.
Uplink Power Amplifier (UPA): It provides power amplification for UL branches.
Main Control Unit (MCU): The MCU is used to monitor and control the operation of the repeater. It also
provides the communication interface for remote control and status indication. LED indicators provide the
operation status of the MCU.
Downlink Filter: The filter is used to restrain the uplink signals to achieve a better isolation between downlink
path and uplink path, to make sure the device can work in a normal duplex mode.
Uplink Filter: The filter is used to restrain the downlink signals to achieve a better isolation between downlink
path and uplink path, to make sure the device can work in a normal duplex mode.
Digital Integrated Module: Consists of RF module, digital process module and monitoring modules. The RF
module amplifies and converts the RF signal toIF signal. The Digital process moduleconverts the IF signalinto
baseband signal via AD conversion and extraction, and filtering. After that, the IF signal will be amplified and
converted to an RF signal by the RF module for RF filtering and amplification. The Monitoring module monitors
and controls the system parameters and it is the interface for both remote monitoring and local commissioning,
and at the same time control the charge and discharge of the backup battery.
Power Supply Unit (PSU): The PSU converts the input voltage into a stable DC supply to provide power for
the internal functional modules.

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3 INSTALLATION
3.1 WARNINGS AND ALERTS
Radio Frequency Energies
There may be situations, particularly for workplace environments near high-powered RF sources, where
recommended limits for safe exposure of human beings to RF energy could be exceeded. In such cases,
restrictive measures or actions may be necessary to ensure the safe use of RF energy.
High Voltage
The equipment has been designed and constructed to prevent, as far as reasonably practicable danger. Any
work activity on or near equipment involving installation, operation or maintenance must be, as far as
reasonable, free from danger.
Where there is a risk of damage to electrical systems involving adverse weather, extreme temperatures, wet,
corrosive or dirty conditions, flammable or explosive atmospheres, the system must be suitably installed to
prevent danger.
Protective Earthing
Equipment provided for the purpose of protecting individuals from electrical risk must be suitable for the
purpose and properly maintained and used.
Handling Precautions
This covers a range of activities including lifting, lowering, pushing, pulling, carrying, moving, holding or
restraining an object, animal or person from the equipment. It also covers activities that require theuse of force
or effort, such as pulling a lever, or operating power tools.
Where some of the abovementioned activities are required, the equipment must be handled with care to avoid
being damaged.
Electrostatic Discharge (ESD)
Observe standard precautions for handling ESD-sensitive devices. Assume that all solid-state electronic
devices are ESD-sensitive. Ensure the use of a grounded wrist strap or equivalent while working with
ESD-sensitive devices. Transport, store, and handle ESD-sensitive devices in static-safe environments.

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3.2 SITE PLANNING CONSIDERATIONS
3.2.1 SITE PLANNING
Site Considerations
Outdoor equipment are designed to be waterproof, rainproof, and with snow protection. Temporary protection
should be taken when the equipment enclosure is opened for installation or maintenance in an outdoor
environment. The equipment must not be opened for installation or maintenance in bad weather (e.g. gale,
storm rainfall, extreme temperatures and high humidity)
Installation Location
Mounting surface shall be capable of supporting the weight of the equipment.
In order to avoid electromagnetic interference, a proper mounting location must be selected to minimize
interference from electromagnetic sources such as large electrical equipment.
Environmental
Humidity has an adverse effect on the reliability of the equipment. It is recommended to install the equipment in
locations having stable temperature and unrestricted air-flow.
The installationlocation for the productshould be well ventilated.The equipment hasbeen designed to operate
at the temperature range and humidity level as stated in the product specifications in the datasheet.
Direct sun light exposure to the equipment should be avoided. Provide additional shelter if necessary.
Power Supply
The power supply unit (PSU) provides power to all modules within the equipment. Depending on the product
variant, it is recommended that the PSU be operated on a dedicated circuit breaker or fused circuit.
Grounding Requirement
Verify that the equipment has been well grounded. This includes antennas and all cables connected to the
system. Ensure lightning protection for the antennas is properly grounded.
Cable Routing
Depending on equipment configuration, a variety of types of cables are required. Where applicable, ensure
cables are properly routed and secured so that they are not damaged.
Manual Handling
During transportation and installation, take necessary handling precautions to avoid potential physical injury to
the installation personnel and the equipment.

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3.2.2 INSTALLATION CHECKLIST
Working space available for installation and maintenance for each mounting arrangement. Ensure
unrestricted airflow.
Ensure earth ground point is within reach of the ground wire.
Ensure a power source is within reach of the power cord and the power source has sufficient capacity.
Where appropriate, ensure unused RF connectors are terminated.
Do not locate the equipment near large transformers or motors that may cause electromagnetic
interference.
Reduce signal loss in feeder cable by minimizing the length and number of RF connections.
Ensure VSWR of antennas system < 1.5:1.
Ensure equipment will be operated within the stated environment (see datasheet)
Observe handling of all cables to prevent damage. Donor antenna should have a narrow beamwidth and
positioned in line-of-sight (LOS) to the donor BTS site so that the donor signal level is maximized. This
allows the use of minimum gain to achieve the maximum DL output power. The UL gain is typically set
lower than or equal to the DL gain to minimize noise interference to the donor BTS
Service antennas should be selected based on the type of service area, e.g., indoor antenna for indoor
application, and panel antenna for outdoor application.

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3.3 INSTALLATION PROCEDURES
3.3.1 GOODS INWARDS INSPECTION
Verify the number of packages received against the packing list.
Check all packages for external damage; report any external damage to the shipping courier. If there is
damage, a shipping agent should be present before unpacking and inspecting the contents because
damage during transit is the responsibility of the agent.
Open and check each package against the packing list. If any items are missing, contact Comba.
Do not remove items from anti-static packing until ready for installation. If damage is discovered at the
time of installation, contact the shipping agent.
3.3.2 TOOLS
See Appendix A for a full list of the recommended tools required for installation and routine maintenance.
3.3.3 PREPARATION
Wall mounting with the masonry bolts supplied, which make use of the outer holes.
382
280
85
8- 14
530
Figure 4: Mounting Rack Overview

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3.3.4 WALL MOUNTING
Drill four holes on the wall using the position of four holes on the mounting rack as a guide. Fix the
mounting rack to the wall using four masonry bolts (M10x110mm).
Install the Mounting Rack to the wall.
Hang the equipment and secure the enclosure to the mounting rack.
Mounting Rack
Expansion Bolt
M10X110
Chassis
M8X25,Hexagon
Head,
Flat Gasket,Pad
Pylons Screw
Wall
Figure 5: PS BDA Wall Mounting
3.3.5 DRIP-LOOP
Comba recommends that every horizontal cable entry to the equipment forms a 'U' before its entry to the
equipment.Water onthe cable will drip down at the bottom of the loop and will not accumulate atthe equipment
connectors.

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3.4 EQUIPMENT CONNECTORS
3.4.1 PS BDA CONNECTORS
The PS BDA is designed for all cable entries from the right or left of the enclosure, as shown in the following
figure.
OMT LAN ALM1 ALM2 AUX
RUN
PWR
ALM
DT/DL IN MT/DL OUT UL OUT
IN1 OUT1 IN2 OUT2 IN3 OUT3 IN4 OUT4
Figure 6: Equipment Connectors

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Table 1: Equipment Connectors
Identifier
Descriptions
Power1
Power cable connector for a pre-installed power cord for connection to AC
(e.g. AC 100-240V 50Hz/60Hz).
DT /DL IN
N-Female connector, It is downlink input port and uplinkoutput port for Duplex mode; It is
downlink input port only for Simplex mode.
MT/DL OUT
N-Female connector, It is downlink output port and uplink input port for Duplex mode; Itis
downlink output port only for Simplex mode.
UL IN
N-Female connector, It is uplink input port for Simplex mode; It is useless for Duplex
mode.
UL OUT
N-Female connector, It is uplink output port for Simplex mode; It is useless for Duplex
mode.
INxx/OUTxx
Reserved for extension
ALM1
Connector for connection to dry contact alarm 1, 2 and 3
ALM2
Connector for connection to dry contact alarm 4, 5 and 6.
AUX
External alarm 1, 2, 3 and 4.
LAN
RJ45 connector for internet connection (Ethernet type only).
OMT
RJ45 connector for local connection by WEBOMT
1
The voltageidentificationis a variant dueto electricitysystem diversity of global regions. Thepower cable connector might
be identified for AC 110V, AC 220V, AC 110V/220V, or DC -48V respectively. Please refer to specific product or contact
local sales if any doubt.

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3.4.2 PS BDA LED Indicators
The LED indicators help user to check the equipment status easily.
Table 2: LED Indicators
Identifier
Colour
Indication
PWR
Green
Power indicator. ON = power on; OFF = power off.
RUN
Green
Operation indicator, flashes every second to indicate normal operation.
ALM
Red
Alarm indicator. ON = alarm; OFF = no alarm.
3.4.3 GROUNDING CONNECTION
Ground Connection
To ensure safe operation of the product, a ground (earth) connection is required. For single phase AC power
source, the product must be grounded by connecting the “earth wire” of the power cord to the ground terminal
of the AC supply. For operating this product with DC power system (such as rectifiers), the product should not
be connected to power systems that switch open the return lead because the return lead could function as the
ground (earth) connection for the equipment.
Protective Ground Connection
The enclosure must be grounded securely by connecting a copper wire (CSA 16mm2) to the grounding terminal
on the equipment/rack, and the other end to a protective ground (i.e. building earth point). An internationally
acceptable color code of the ground connection wire is green/yellow.
Such a ground connection implements the “Protective Ground Connection”, and must be connected to the
equipment at the designated ground point. In general, do not connect the supply before establishing an
adequate ground (earth) connection.
Construct the ground wire, and use appropriate crimp connectors where necessary. Locate and connect the
equipment grounding terminal to a protective ground (i.e. building earth point).
3.4.4 RF CABLE CONNECTION
Single band PS BDA RF cables connection is as follows:
PS BDA MT port Connects to the feeder cable from service antennas.
PS BDA DT port Connects to the feeder cable from donor antennas.
3.4.5 ETHERNET CONNECTION
Connect Ethernet with ‘LAN’port in the panel, Ethernet type only.