FCC ID: PX8-RX4122-B UHF Public Safety Bi-directional Amplifier

CriticalPoint Public Safety BDA UHF PUBLIC SAFETY BI-DIRECTIONAL AMPLIFIER USER MANUAL Public Safety BDA RX-4122 Class A & Class B QE: 1-0-1 Comba Telecom Ltd. INSTALLATION GUIDE FOR RX-4122 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This is an unpublished work the copyright in which vests in Comba International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. ENU STATUS : 1-0-1 Copyright - refer to title page Page 2 INSTALLATION GUIDE FOR RX-4122 0.1 CONTENTS Section Page 0.1 0.2 0.3 0.4 0.5 1 2 2.1 2.2 2.3 3 3.1 3.2 3.2.1 3.2.2 3.3 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5 3.4 3.4.1 3.4.2 3.4.3 3.4.4 3.4.5 3.4.6 4 4.1 4.2 5 5.1 5.2 5.2.1 5.2.2 5.2.3 5.2.4 5.3 6 7 7.1 7.2 CONTENTS ................................................................................................................................. 3 INDEX TO FIGURES AND TABLES ......................................................................................... 5 HISTORY ..................................................................................................................................... 6 GLOSSARY OF TERMS ............................................................................................................ 7 SAFETY NOTICES AND ADMONISHMENTS ......................................................................... 8 GENERAL INFORMATION ........................................................................................................ 9 EQUIPMENT DESCRIPTION .................................................................................................. 10 FUNCTIONAL BLOCK DIAGRAM ........................................................................................... 10 EQUIPMENT LAYOUT ............................................................................................................. 11 EQUIPMENT CONSTITUTION ................................................................................................ 12 INSTALLATION ......................................................................................................................... 13 WARNINGS AND ALERTS ...................................................................................................... 13 SITE PLANNING CONSIDERATIONS .................................................................................... 14 SITE PLANNING ....................................................................................................................... 14 INSTALLATION CHECKLIST................................................................................................... 15 INSTALLATION PROCEDURES ............................................................................................. 16 GOODS INWARDS INSPECTION........................................................................................... 16 TOOLS ....................................................................................................................................... 16 PREPARATION ......................................................................................................................... 16 WALL MOUNTING .................................................................................................................... 17 DRIP-LOOP ............................................................................................................................... 17 EQUIPMENT CONNECTORS ................................................................................................. 18 PS BDA CONNECTORS .......................................................................................................... 18 PS BDA LED Indicators ............................................................................................................ 20 GROUNDING CONNECTION .................................................................................................. 20 RF CABLE CONNECTION ....................................................................................................... 20 ETHERNET CONNECTION ..................................................................................................... 20 DRY CONTACT CABLE CONNECTION ................................................................................ 21 COMMISSIONING .................................................................................................................... 23 PRE-COMMISSIONING TASKS .............................................................................................. 23 COMMISSIONING PROCEDURE ........................................................................................... 24 WEB GUI ................................................................................................................................... 26 WEB GUI CONNECTION ......................................................................................................... 26 WEB GUI INTRODUCTION ..................................................................................................... 27

[DEVICES] ................................................................................................................................. 27

[COMMISSIONING] .................................................................................................................. 29

[FIRMWARE] ............................................................................................................................. 29

[MANAGEMENT]....................................................................................................................... 31 COMMISSIONING PROCEDURE ........................................................................................... 41 MAINTENANCE ........................................................................................................................ 48 APPENDICES ........................................................................................................................... 49 APPENDIX A: ............................................................................................................................ 49 APPENDIX B: TOOLS .............................................................................................................. 51 ENU STATUS : 1-0-1 Copyright - refer to title page Page 3 7.3 7.4 INSTALLATION GUIDE FOR RX-4122 APPENDIX C: DECLARATION OF HARMFUL SUBSTANCES AND CONTENT ............... 52 APPENDIX D: RMA (RETURN MATERIAL AUTHORIZATION) ........................................... 53 ENU STATUS : 1-0-1 Copyright - refer to title page Page 4 INSTALLATION GUIDE FOR RX-4122 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 ENU STATUS : 1-0-1 Copyright - refer to title page Page 5 INSTALLATION GUIDE FOR RX-4122 0.3 HISTORY Change No. 1 2 ENU 1-0-0 1-0-1 Details Of Change This manual first created and issued in Jan. 2018. Update to add the part for Class B in

. ENU STATUS : 1-0-1 Copyright - refer to title page Page 6 INSTALLATION GUIDE FOR RX-4122 0.4 GLOSSARY OF TERMS Abbreviation Definition ALC ATT BTS CH CSA dB dBm DL DT DPX FS Hz ID IF LNA LOS MCU MHz MT Automatic Level Control Attenuator Base Transceiver Station Channel Cross Sectional Area Decibel Decibels relative to 1 milliwatt Downlink Donor Terminal Duplexer Frequency Selection Hertz Identification Intermediate Frequency Low Noise Amplifier Line-of-Sight Main Control Unit Megahertz Mobile Terminal MTBF Mean Time Between Failures NF OMC OMT PA PLL PSU RF SMA UL VAC VDC Noise Figure Operation & Maintenance Center Operation & Maintenance Terminal Power Amplifier Phase Locked Loop Power Supply Unit Radio Frequency Sub-Miniature A Connector Uplink Volts Alternating Current Volts Direct Current VSWR Voltage Standing Wave Ratio ENU STATUS : 1-0-1 Copyright - refer to title page Page 7 INSTALLATION GUIDE FOR RX-4122 0.5 SAFETY NOTICES AND ADMONISHMENTS This document contains safety notices in accordance with appropriate standards. In the interests of conformity with the territory standards for the country concerned, the equivalent territorial admonishments are 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 notices in 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 users 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 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 users authority to operate the equipment. Alert: These draw the attention of personnel to hazards that may cause damage to the equipment. An example 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 to the equipment but where there is a possibility of seriously impairing its performance, e.g. by mishandling or gross maladjustment. Warnings and Cautions within the main text do not incorporate 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 signal boosters 90.219) online

(as defined 47 CFR in ENU STATUS : 1-0-1 Copyright - refer to title page Page 8 INSTALLATION GUIDE FOR RX-4122 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. Figure 1: Front, Side and Bottom Views of the PS BDA Enclosure ENU STATUS : 1-0-1 Copyright - refer to title page Page 9 390315270800 INSTALLATION GUIDE FOR RX-4122 2 EQUIPMENT DESCRIPTION 2.1 FUNCTIONAL BLOCK DIAGRAM Figure 2: PS BDA Functional Block Diagram In the downlink path, the BTS signals are received by the donor antenna of the repeater. After the 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 uplink filter, the circulator, after that, the uplink signals are sent to the donor antenna for transmission back to the BTS. ENU STATUS : 1-0-1 Copyright - refer to title page Page 10 MobileAntDonorAntMobilePowerSupplyAlarmIndicatorMain Control UnitOMTLANDTMTBTS DL Subband 01BIAS TeeDL Subband 02PAPADL_01DL_02UL_01UL_02DL_01DL_02UL Subband 01UL Subband 02UL_01UL_02Digital Integrated moduleLNADL_01DL_02LNAUL_01UL_02DL_01DL_02UL_01UL_02 INSTALLATION GUIDE FOR RX-4122 2.2 EQUIPMENT LAYOUT Shown below is the internal layout of the PS BDA. Figure 3: Layout of the PS BDA ENU STATUS : 1-0-1 Copyright - refer to title page Page 11 MTDTDL FilterUL FilterDL FilterUL FilterDT/DL INMT/DL OUTUL INUL OUTFront Side of 3rd Layer (Passive Unit)Back Side of 2nd Layer Front Side of 2nd Layer (Passive Unit)LoopCirculatorCirculatorUL FilterDL FilterDL FilterUL FilterPSUDistribution BoardMCU+28V+28VGNDRF OUTRF IN+28VGNDRF OUTRF INDL PADigital Integrated Module+28VRef INLNA1 OUTLNA1 INLNA2 INLNA2 OUTUL INUL OUTDL OUTDL INUL PAOUT4IN4OUT3IN3OUT2IN2OUT1IN1LANRUNALMPWROMT INSTALLATION GUIDE FOR RX-4122 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 to IF signal. The Digital process module converts the IF signal into 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. ENU STATUS : 1-0-1 Copyright - refer to title page Page 12 INSTALLATION GUIDE FOR RX-4122 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 the use 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. ENU STATUS : 1-0-1 Copyright - refer to title page Page 13 INSTALLATION GUIDE FOR RX-4122 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 installation location for the product should be well ventilated. The equipment has been 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. ENU STATUS : 1-0-1 Copyright - refer to title page Page 14 INSTALLATION GUIDE FOR RX-4122 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. ENU STATUS : 1-0-1 Copyright - refer to title page Page 15 INSTALLATION GUIDE FOR RX-4122 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. ENU STATUS : 1-0-1 Figure 4: Mounting Rack Overview Copyright - refer to title page Page 16 382280858-14530 INSTALLATION GUIDE FOR RX-4122 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. 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 on the cable will drip down at the bottom of the loop and will not accumulate at the equipment connectors. ENU STATUS : 1-0-1 Copyright - refer to title page Page 17 Mounting RackExpansion Bolt M10X110ChassisM8X25,Hexagon Head,Flat Gasket,PadPylons ScrewWall INSTALLATION GUIDE FOR RX-4122 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. Figure 6: Equipment Connectors ENU STATUS : 1-0-1 Copyright - refer to title page Page 18 OMTLANALM1ALM2AUXRUNPWRALMDT/DL INMT/DL OUTUL OUTIN1OUT1IN2OUT2IN3OUT3IN4OUT4 INSTALLATION GUIDE FOR RX-4122 Table 1: Equipment Connectors Identifier Descriptions Power1 DT /DL IN Power cable connector for a pre-installed power cord for connection to AC

(e.g. AC 100-240V 50Hz/60Hz). N-Female connector, It is downlink input port and uplink output 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; It is downlink output port only for Simplex mode. UL IN UL OUT N-Female connector, It is uplink input port for Simplex mode; It is useless for Duplex mode. N-Female connector, It is uplink output port for Simplex mode; It is useless for Duplex mode. INxx/OUTxx Reserved for extension ALM1 ALM2 AUX LAN OMT Connector for connection to dry contact alarm 1, 2 and 3 Connector for connection to dry contact alarm 4, 5 and 6. External alarm 1, 2, 3 and 4. RJ45 connector for internet connection (Ethernet type only). RJ45 connector for local connection by WEBOMT 1 The voltage identification is a variant due to electricity system diversity of global regions. The power 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. ENU STATUS : 1-0-1 Copyright - refer to title page Page 19 INSTALLATION GUIDE FOR RX-4122 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 RUN ALM Green Green Red Power indicator. ON = power on; OFF = power off. Operation indicator, flashes every second to indicate normal operation. 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. ENU STATUS : 1-0-1 Copyright - refer to title page Page 20 INSTALLATION GUIDE FOR RX-4122 3.4.6 DRY CONTACT CABLE CONNECTION Below please find the pin definitions of dry contact cables. Pin NO. Pin Input Table 3: Pin Definition of Dry Contact Cable 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 ALM1 ALM2 AUX CLOSE1 COM1 OPEN1 CLOSE2 COM2 OPEN2 CLOSE3 COM3 OPEN3 CLOSE4 COM4 OPEN4 CLOSE5 COM5 OPEN5 CLOSE5 COM5 OPEN5 EXT ALM1 EXT ALM2 EXT ALM3 EXT ALM4 GND GND GND GND NC 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 ENU STATUS : 1-0-1 Copyright - refer to title page Page 21 INSTALLATION GUIDE FOR RX-4122 Dry contact status:

Main Power Normal/Lost dry contact status:

Pin definition of ALM and AUX connectors:

End of Section ENU STATUS : 1-0-1 Copyright - refer to title page Page 22 INSTALLATION GUIDE FOR RX-4122 4 COMMISSIONING 4.1 PRE-COMMISSIONING TASKS After equipment installation, perform the following steps before equipment powering and commissioning:

Verify that the expected voltage, current and power levels do not violate any ratings. Visually inspect the power connection within the equipment. Ensure that the power cable is correctly and securely connected, including the grounding wire, RF cable and other cables. Check the grounding connection and verify that the ground resistance is less than 5. Test the antenna system and ensure that the echo loss within working frequency is less than -14dB

(VSWR<1.5). ENU STATUS : 1-0-1 Copyright - refer to title page Page 23 INSTALLATION GUIDE FOR RX-4122 4.2 COMMISSIONING PROCEDURE Perform the following procedures for system commissioning. Figure 7: Commissioning Procedure ENU STATUS : 1-0-1 Copyright - refer to title page Page 24 Start commissioning guide in WEB GUISub Band SettingRF SettingEndIsolation DetectionSite Information Setting INSTALLATION GUIDE FOR RX-4122 Commissioning Tasks Observation Table 4: Commissioning Task Explanation 1. Site Information Setting 2. Sub Band Setting 3. Isolation detection 4. RF Setting 5. Recommended DL and UL gain parameters Site ID, Dev ID, Dev Info, Longitude , Latitude, Date/time setting Sub Band Frequency setting. Detect isolation of service antenna and donor antenna. DL_Target and the DL frequency center, the filter bandwidth setting and the switch setting. The commissioning guide will provide recommended DL/UL gain settings. Users will still need to set all the gains manually in the Device pages, and the frequencies for all the independent channels in the same Device pages after the commissioning process is finished. End of Section ENU STATUS : 1-0-1 Copyright - refer to title page Page 25 INSTALLATION GUIDE FOR RX-4122 5 WEB GUI The PS BDA can be monitored and controlled via the WEB GUI; use the following guide to finish system parameter setting and commissioning. 5.1 WEB GUI CONNECTION Step 1: Connect the OMT port to the PC RJ45 port with the supplied RJ45 cable to set up a physical connection. Step 2: Open a browser (browser IE7.0, IE8.0, Chrome or Firefox, suggested display resolution is 1024768), input Web GUI IP address: 192.168.8.101, click [Enter]. NOTE:

DHCP and DNS are also available to login to the Web GUI. The domain name is: www.combaomt.com. Advise to clear all the history record of Browse before connecting BDA every time. Figure 8: Input IP Address Figure 9: Input Domain Name Step 3: Input User Name: admin; Password (default password: admin). Click [Log in]. Figure 10: Input User Name and Password ENU STATUS : 1-0-1 Copyright - refer to title page Page 26 INSTALLATION GUIDE FOR RX-4122 5.2 WEB GUI INTRODUCTION After log in, the Web GUI main screen will appear. Indicates the equipment status Shows the basic information about the PS BDA On Comba Web GUI Home Screen, there are four Menu bars:

[Devices], [Commissioning], [Firmware] and [Management]. Figure 11: Web GUI Main Screen 5.2.1 [DEVICES]

The [Devices] Screen shows the equipment status, such as PA status, alarm information, etc. Overview Screen Indicating alarm status Indicating alarm status Click to enable

/disable alarm Click to enable

/disable alarm Figure 12: Overview Screen ENU STATUS : 1-0-1 Copyright - refer to title page Page 27 INSTALLATION GUIDE FOR RX-4122 400MHz Screen-Class A This screen is only available for 400MHz PS BDA Class A Selecting sub band Frequency information Channel bandwidth Figure 13: 400MHz Screen 1 RFparameters Sub band switch status Click to set frequency information, , enable/disable RF switch. Click to set bandwidth, UL/DL ATT, enable/disable RF switch. Selecting sub band Center frequency of channel Sub band switch status 400MHz Screen-Class B Figure 14: 400MHz Screen 2 ENU STATUS : 1-0-1 Copyright - refer to title page Page 28 INSTALLATION GUIDE FOR RX-4122 Click to set Freq Low and High, DL/UL Gain, Enable/disable RF switch. DL Freq Low and High of sub-bands RF parameters of sub-bands Sub-bands switch status Figure 15: 400MHz Screen 5.2.2 [COMMISSIONING]

A work flow of the commissioning process is shown on [Commissioning] Screen. Click the [Start] button, the software will guide you through the commissioning step by step. For details, please refer to chapter 5.3. Figure 16: [Commissioning] Screen 5.2.3 [FIRMWARE]

There are two functions on the [Firmware] bar: [upgrade] and [swap]. [Upgrade] is used to upgrade software, and [Swap] is to replace the current firmware version with the previous one. Follow the steps shown below figure to upgrade the firmware. ENU STATUS : 1-0-1 Copyright - refer to title page Page 29 INSTALLATION GUIDE FOR RX-4122 Step 2: Click to finish the software upgrading. Step 1: Click to select the file for upgrading. Figure 17: [Firmware] Screen MCU Firmware Upgrade Click to swap the firmware to the previous version Figure 18: [Firmware] Screen Firmware Swap Step 1: Check the module that needs to be updated. Step 3: Click to finish the upgrading. Step 2: Click to select the file. Figure 19: [Firmware] Screen Module Update ENU STATUS : 1-0-1 Copyright - refer to title page Page 30 INSTALLATION GUIDE FOR RX-4122 5.2.4 [MANAGEMENT]

Other parameters can be configured on the [Management] Screen. Management menu, click Enter to each page for parameters setting. Figure 20: [Management] Screen ENU STATUS : 1-0-1 Copyright - refer to title page Page 31 INSTALLATION GUIDE FOR RX-4122 There are nine function bars list on the left side of the [Mangement] Screen. Inport&Export Click to import/export the configuration parameters. Figure 21: Management Import & Export The parameters that can be imported / exported include sub band, alarm enable, ATT value, RF switch, and DL output power. This function can help users quickly configure PS BDA parameters. For example, if one PS BDA is finished configuration, users can export the parameters and save it as a file on the PC, and then import this file to other PS BDAs for faster set up of additional PS BDAs. ENU STATUS : 1-0-1 Copyright - refer to title page Page 32 INSTALLATION GUIDE FOR RX-4122 IP Setting Configure the IP address for remote monitoring. Figure 22: Management IP Setting Note: For remote monitoring, the IP Address must be set correctly based on the location IP of the remote connection. If more than one piece of equipment is connected to the public network through the same router, the routers local IP CANNOT be set as 192.168.8.*. ENU STATUS : 1-0-1 Copyright - refer to title page Page 33 INSTALLATION GUIDE FOR RX-4122 Comm. Setting Figure 23: Management Comm. Setting Note: There are 4 available communication types: SMS, PS, SNMP and ETHERNET. You can choose a suitable type for remote monitoring. ENU STATUS : 1-0-1 Copyright - refer to title page Page 34 INSTALLATION GUIDE FOR RX-4122 Security Figure 24: Management Security ENU STATUS : 1-0-1 Copyright - refer to title page Page 35 INSTALLATION GUIDE FOR RX-4122 Click

, [Modify Password] window will pop-up. Figure 25: Modify Password Note: Username cannot be modified. Device Reset Figure 26: Management Device Reset

, all the parameters and alarms will be reset to factory default value. The Device Reset Note: Click process will last about 2~4 minutes. For PMU monitor reset, users need to re-login to the WEB GUI. ENU STATUS : 1-0-1 Copyright - refer to title page Page 36 INSTALLATION GUIDE FOR RX-4122 Device Info Input device information. Note: Users can input a maximum of 30 characters in Device Info. Figure 27: Management Device Info Isolation Click here to get PC time. Figure 28: Management Isolation Note: This Step is the same as step 5 of [Commissioning]. Users can check isolation again by clicking the Check button, the detection range is from 65dB to 125dB. ENU STATUS : 1-0-1 Copyright - refer to title page Page 37 INSTALLATION GUIDE FOR RX-4122 RF setting Figure 29: Management RF Setting Alarm Setting Figure 30: Management Alarm Setting Click to start the alarm test. ENU STATUS : 1-0-1 Copyright - refer to title page Page 38 INSTALLATION GUIDE FOR RX-4122 Report Figure 31: Management Report Note: Click Create to create the report (the report cant be created in IE browser) and make sure that PDF Reader software is installed on the computer. If not, the report will not be visible. The device basic information, an overview of RF information and sub-band RF information are included in this report. Please refer to appendix D for an example of device report. Alarm Log Click to export alarm log or clear alarm log Figure 32: Management Alarm Log ENU STATUS : 1-0-1 Copyright - refer to title page Page 39 INSTALLATION GUIDE FOR RX-4122 Clear History Alarm Click to clear history alarm Figure 33: Management Clear History Alarm ENU STATUS : 1-0-1 Copyright - refer to title page Page 40 INSTALLATION GUIDE FOR RX-4122 5.3 COMMISSIONING PROCEDURE To complete the installation and commissioning, users need to follow the steps below. Step 1: Click the Menu bar [Commissioning] on home screen, a work flow will be displayed. Figure 34: Commissioning Procedure Start Step 2: Click to start the process. Figure 35: Commissioning Procedure Site Info. Setting Step 3: Click

, to set the site information. ENU STATUS : 1-0-1 Copyright - refer to title page Page 41 INSTALLATION GUIDE FOR RX-4122 Figure 36: Device Information Setting It is mainly used to record device location and Date/Time provides a time reference. Clicking the Config Value of Date/Time will update the Date/Time automatically. Step 4 :

a. Click to enter to Sub Band Setting/Channel parameters setting-Class A Figure 37: Device Sub Band Setting-Class A ENU STATUS : 1-0-1 Copyright - refer to title page Page 42 INSTALLATION GUIDE FOR RX-4122 Figure 38: Channel parameters setting-Class A Reminder:

Make sure the frequency of sub-bands match the actual frequency of filters, or BDA cannot work normally. If the frequency is within [450MHz,470MHz], the bandwidth between DL Freq Low and DL Freq High can be adjusted from 0.2 to 5MHz only. If the frequency is within[ 470,512], the bandwidth between DL Freq Low and DL Freq High can be adjusted from 0.2-3MHz. The frequency edges of two sub bands can be overlap, but they cannot be cross-contained. The total channel quantity is 32CH within 4 sub-bands. The channel center frequency must be within the frequency range of its relative sub-band, if it is not within the range, the system will show a reminder window to show the setting unsuccessful. If the sub band is off, all the channels belong to the sub band are auto set to off. The procedure of sub band switch on: sub band 1 is first, and then 2, 3, 4. The procedure of sub band switch off: sub band 4 is first, and then 3, 2, 1. And the isolation use sub band 1 to test, so make sure sub band 1 is always on when BDA is working. b. Click to enter to Sub Band Setting/Channel parameters setting-Class B ENU STATUS : 1-0-1 Copyright - refer to title page Page 43 INSTALLATION GUIDE FOR RX-4122 Figure 39: Device sub-band setting-Class B Reminder:

Make sure the frequency of sub-bands match the actual frequency of filters, or BDA cannot work normally. If the frequency is within [450MHz,470MHz], the bandwidth between DL Freq Low and DL Freq High can be adjusted from 0.2 to 5MHz only. If the frequency is within[ 470,512], the bandwidth between DL Freq Low and DL Freq High can be adjusted from 0.2-3MHz. The frequency edges of two sub bands can be overlap, but they cannot be cross-contained. NOTE: Make sure the device is connected with appropriate donor and service antennas before proceeding to step 5. Step 5: Click to enter to Isolation Detection Screen. Figure 40: Commissioning Procedure Isolation Detection Click to start Isolation Detecting, then a [Confirm] window will pop-up. ENU STATUS : 1-0-1 Copyright - refer to title page Page 44 INSTALLATION GUIDE FOR RX-4122 Click to continue. If isolation detection passes, the process will go to Isolation Detection Finish shown as Figure 43 If failed, a Tips window will pop-up, users need to check whether the system isolation is adequate. NOTE: At the end of the first frequency band commissioning, users can start other frequency band commissioning. Figure 41: Commissioning Procedure Isolation Detection Confirm Figure 42: Commissioning Procedure Isolation Detection Failed ENU STATUS : 1-0-1 Copyright - refer to title page Page 45 INSTALLATION GUIDE FOR RX-4122 Figure 43: Commissioning Procedure Isolation Detection Finish Step 6: RF Setting Screen for setting the center frequency. Step 2: Input the desired value. Step 1: Click to open the parameter setting page. Figure 44: Commissioning Procedure Center Frequency Setting Step 1: Click to open the parameter setting page. Step 2: Input the desired value. Step 3: Click to finish the setting. Step 4: Click next to continue RF setting. Figure 45: Commissioning Procedure Channel Number Setting ENU STATUS : 1-0-1 Copyright - refer to title page Page 46 INSTALLATION GUIDE FOR RX-4122 Step 7: Click to finish the commissioning. In this window, a summary of device setting is shown. Figure 46: Commissioning Procedure Finish End of Section ENU STATUS : 1-0-1 Copyright - refer to title page Page 47 INSTALLATION GUIDE FOR RX-4122 6 MAINTENANCE The PS BDA is designed for trouble-free operation and generally does not need maintenance. Maintenance activities should only be carried out by trained personnel. Periodic inspection of the repeater equipment(s) is recommended, the recommended tasks includes:

Verify the direction and position of antennas. Re-align if necessary. Make sure the cable connector and sealing on the RF cable connectors are not damaged. Verify lightning and grounding protection is in good condition. End of Section ENU STATUS : 1-0-1 Copyright - refer to title page Page 48 INSTALLATION GUIDE FOR RX-4122 7 APPENDICES 7.1 APPENDIX A:

Antenna installation:

Installation of an antenna must comply with the FCC RF exposure requirements. The antenna used for this transmitter must be mounted on permanent structures. The FCC regulations mandate that the ERP of type B signal boosters should not exceed 5W, this is equivalent to 8.2W EIRP (39.1dBm). Therefore the max antenna gain allowed for this type of signal booster should be limited to the values given by equation 1 (below) for the service antenna. For example:

Equation (1) Max Service antenna gain Max Service antenna gain (dBi) = 39.1-(36dBm-# of antennas in dB cable losses in dB). No. of Antennas Cable losses 4 1 10 3 3 3 Max Allowed Antenna Gain 39.1-(36-6-3)=12.1dBi 39.1-(36-0-3)=6.1dBi 39.1-(36-10-3)=15.1dBi Compliance with FCC deployment rule regarding the radiation of noise Good engineering practice must be used in regard to the signal boosters noise radiation. Thus, the gain of the signal booster should be set so that the ERP of the output noise from PS BDA should not exceed the level of

-43 dBm in 10 kHz measurement bandwidth. In the event that the noise level measured exceeds the aforementioned value, the PS BDA gain should be decreased accordingly. In general, the ERP of noise on a spectrum more than 1 MHz outside of the pass band should not exceed -70 dBm in a 10 kHz measurement bandwidth. RX-4122 PS BDA has a noise level of -21 dBm in 100 kHz (equals to -31dBm in 10kHz) measurement at 1 MHz spectrum outside the pass band of BDA and an in-band noise level at around -50 dBm in a 10 kHz bandwidth. Therefore, the noise at the antenna input port should be calculated based on equation (2). For example: in band noise RX-4122 PS BDA connected to 10 service antennas with a 100m long inch cable. Losses of such a cable with the connectors = ~ 12dB Assuming 10 service antennas: antenna splitter losses = 11 dB Based on equation (2) Input antenna noise (to the antenna) = 51 12 0 11=-74 dBm ERP Equation (2) Input Noise to service antenna Input Noise to service antenna:

-31dBm antenna splitter losses in dB out of band rejection of filters - cable loss in dB ENU STATUS : 1-0-1 Copyright - refer to title page Page 49 INSTALLATION GUIDE FOR RX-4122 The in-band input noise to the antenna should be 51 12 0 11= -63dBm ERP For example: Out of band noise RX-4122 PS BDA connected to 10 service antennas with a 100m long inch cable. Losses of such a cable with the connectors = ~ 12dB Assuming 10 service antennas: antenna splitter losses = 11 dB Out of band rejection of filters: more than 45dBc Based on equation (3) Input antenna noise (to the antenna) = 31 12 45 11= 99dBm ERP The Out of-band input noise to the antenna should be 31 12 45 11= 99dBm ERP Conclusion:

Good engineering practice requires that in general when the out of band noise measured at the service antenna input is more than -70 dBm per 10 kHz measurement bandwidth, an external band pass filter should be added to attenuate the out of band noise level. All Comba BDAs include high selectivity duplexers and filters to attenuate the out of band noise. Compliance with FCC Part 90.219 (d)(6)(i) The deployment rules require that the ERP of intermodulation products should in general not exceed -30dbm. This is not a formidable task since in the vast majority of the passive DAS installations; the signal loss in the DAS due to splitting to multiple antenna and cable losses is significant. As well as the above RX-4122 PS BDA is more likely to be used in a multicarrier environment (more than 2 carriers), which in turn will reduce the intermodulation products produced by the device. The following statement is already in the user manual to highlight the requirement to the installer for the instances where the above does not reduce the ERP of the intermodulation products to -30dBm. The installation procedure must result in RX-4122 PS BDA complying with FCC requirements 90.219(d). In order to meet FCC requirements 90.219(d), it may be necessary for the installer to reduce the UL and/or DL output power for certain installations. ENU STATUS : 1-0-1 Copyright - refer to title page Page 50 INSTALLATION GUIDE FOR RX-4122 7.2 APPENDIX B: TOOLS The following are the recommended list of tools for new installation and routine maintenance. Slotted Screwdriver Philips Screwdriver Ring Spanner (Assorted size: 12~20mm) Electrically operated drill and masonry drill bits 12mm Anti-static Wrist Strap Side Cutter Frequency Counter (e.g. FLUKE PM6685R) RF Power Meter (e.g. Bird 5000) ENU STATUS : 1-0-1 Copyright - refer to title page Page 51 INSTALLATION GUIDE FOR RX-4122 7.3 APPENDIX C: DECLARATION OF HARMFUL SUBSTANCES AND CONTENT Product Name: Public Safety BDA Model: RX-4122 Harmful substance and content of this product as below table shown:

Part Name A B Harmful Substance Pb Hg Cd Cr (VI) PBB PBDE Note: Above table complies with SJ/T 11364.

: Indicates that the harmful substance content in all homogeneous materials for corresponding part is under the limited requirement of GB/T 26572.

: Indicates that the harmful substance content in at least one single homogeneous material for the corresponding part exceeds the limited requirement of GB/T 26572. Remark: The content of the parts marked with above exceeds the requirement as there is still no mature alternative technologies to achieve the replacement of poisonous and harmful materials or elements. ENU STATUS : 1-0-1 Copyright - refer to title page Page 52 INSTALLATION GUIDE FOR RX-4122 7.4 APPENDIX D: RMA (RETURN MATERIAL AUTHORIZATION) End of Section ENU STATUS : 1-0-1 Copyright - refer to title page Page 53 INSTALLATION GUIDE FOR RX-4122 ENU STATUS : 1-0-1 Copyright - refer to title page Page 54