Comflex NGc User manual 1. System Introduction 1.1 Introduction Comflex NGc is an in-building distributed antenna solution for enterprise and consumer application, supporting the wide application range of cellular generations. This solution is based on analog DAS technology with wide-band and multi-band distribution architecture, flexible off-air or wired connection mode, enabling efficient utilization of signal links. It is designed to support multi-band, multi-technology, and multi-operator networks with flexible configuration and easy commissioning. 1.2 System Architecture MU Master Unit Select dedicated radio signal, transmit to fiber signal and then transfer to fiber Hub. It can support two kinds connectivity to radio signal: off-air connection and wired connection with different module. Fiber Hub The Fiber Hub is the central Hub and Distribution element for the analog DAS system. The fiber hub interfaces between the MU and the active antenna unit, allowing it to receive the operators service signals in optical link, and to route signals to the active antenna unit. Active Antenna Unit The active antenna unit is a low-power remote antenna unit with 6 dBm per band. 1.3 System Function 1.3.1 System features 1) Network topology MU + Fiber HUB + ARU: 1+16+256 MU can connect to ONE slave MU MU can extend up to 16pcs fiber Hub Fiber HUB can connect to 16pcs ARU MU-HUB max fiber loss 8dB HUB-ARU max fiber loss distance 45dB 2) Power Supply MU & HUB: AC 110V ARU: DC 48V 3) Couple way Off-air couple : MU - BDA Card 4) The booster be able to detect and mitigate (i.e., by automatic gain reduction or shut down), any oscillations in uplink and downlink bands. Oscillation detection and mitigation must occur automatically within 0.3 seconds in the uplink band and within 1 second in the downlink band. In cases where oscillation is detected, the booster must continue mitigation for at least one minute before restarting. After five such restarts, the booster must not resume operation until manually reset. 5) The booster circuit support that automatically controls the gain of a signal by applying more gain to weaker received signals and less (or no) gain to stronger received signals. 1.3.2 Monitoring 1) Local monitor: local debug and commission 2) Remote control: Control the system in MU site 3) System upgradeSoftware upgrade in MU 4) Demodulation: Demodulate the cellular features: RSRP, SINR, PLMN 1.4 Specification 1.4.1 Optical Specification Optical Specification Operation Frequency 600MHz-1GHz,1.7GHz-2.2GHz Fiber Mode Wavelength Optical Output
Simplex nm 1310, 1550 + WDM MU HUB dBm
-2 +2 6-8 Return loss dB
> 45 Connector Type
SC/APC 1.4.2 Cable Specification Cable Specification Operation Frequency DC-4GHZ impedance VSWR Insert Loss
dB 50 1.2 L*0.48+0.2dB@DC-4GHz @ meter 1.4.3 Radio Specification Frequency UL DL IBW Downlink max output power (ARU) Downlink input range
(BDA Card) UL max gain (BDA Card) DL max gain (BDA Card) ATT adjust range In-band ripple(P-P) Emission spur MHz MHz dBm dBm dB dB dB dB 700MHz 850MHz 1900MHz EAWS 698-716 / 777-787 824-849 1850 1915 1710 1755 728-746 / 746-756 869-894 1930 1995 2110 2155 18/10 6 25 6 65 6 45/45 6
-95 -50(RSRP) 80 80 MU: 0 30, ARU: 0 20 4 FCC 6 FCC 6 FCC 6 FCC UL NF at max gain dB 10 System delay (BDA Card) Input VSWR MU Max input power
(BDA Card) ARU Max input RF power usec 10 1.5 dBm
-10 dBm
-10 2. INSTALLATION 2.1 WARNINGS AND ALERTS Laser Laser light can cause damage to eyes. Laser light is not visible. Viewing it directly does not cause pain. The iris of the eye will not close when viewing a bright light. Consequently, serious damage to the retina of the eye is possible. NEVER LOOK INTO THE END OF A FIBER WHICH MAY HAVE A LASER COUPLED TO IT. 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 practicable danger, as far as reasonably possible. Any work activity on or near equipment involving installation, operation or maintenance must be free from danger, as far as reasonably possible. 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 or person. It also covers activities that require the use of force or effort, such as pulling a lever, or operating power tools. 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. WARNING This is a CONSUMER device. BEFORE USE, you MUST REGISTER THIS DEVICE with your wireless provider and have your providers consent. Most wireless providers consent to the use of signal boosters. Some providers may not consent to the use of this device on their network. If you are unsure, contact your provider. You MUST operate this device with approved antennas and cables as specified by the manufacturer. Antennas MUST be installed at least 30 cm (12 inches) from any person. Your MUST cease operating this device immediately if requested by the FCC or a licensed wireless service provider. WARNING. E911 location information may not be provided or may be inaccurate for calls served by using this device. This device may be operated ONLY in a fixed location for in-building use. Caution for use of unauthorized antennas, cables, and/or coupling devices not conforming with ERP/EIRP restrictions is not permitted. Antenna type and permitted max antenna gain: External Dedicated Antenna with gain 10 dBi or less for MU. The 10 meter height limit of Section 27.50(d)(4) applies for Fixed Consumer Signal Boosters transmitting in 1710-1755 MHz. The antenna for the device must be installed to comply with the 10 meter above ground maximum antenna height limitation. Product request the min cable length for both connect donor antenna to booster and server antenna to booster is 5 meters for mitigate any unintended oscillations in uplink and downlink bands. A subscriber must have the consent of a wireless-services provider to operate a Consumer Signal Booster. Subscribers may obtain provider consent in a variety of ways. For example, AT&T, Sprint, TMobile, and Verizon Wireless have voluntarily committed to allow their subscribers to use properly certificated Consumer Signal Boosters (i.e., boosters that meet the new rules) on their networks. Also, a signal booster manufacturer could seek authorization for use of a particular booster model on behalf of all subscribers of specific providers. Alternatively, a provider may specify a testing protocol that if satisfied would result in licensee consent to specific booster models. A subscriber may also seek a licensees express consent to operate a signal booster, e.g., by phone call or e-mail.[R11]
Public Notice DA 16-137 [R28] gives listings of Consumer Boosters that have received FCC certification as of February 2, 2016. The following selected information about wireless providers Consumer Booster registration mechanisms supplements the requirements and information given in Sections 20.21, 22.9, 24.9, 27.9, and the FCC Signal Boosters website (http://wireless.fcc.gov/signal-boosters/). Sprint Nextel will allow consumers to register their signal boosters by calling their toll-free number. They have already trained their calling center and have designated an engineer to handle inquiries. They may eventually allow consumers to register on their website but they want to gauge how the process works via phone first. T-Mobile online registration link: (www.T-Mobile.com/BoosterRegistration); (https://saqat.t-
mobile.com/sites/SignalBooster#). Verizons online registration link: (http://www.verizonwireless.com/wcms/consumer/register-signal-
booster.html). AT&T will allow online registration and will inform OET Lab with the weblink when it is ready. U.S.Cellular (http://www.uscellular.com/uscellular/support/fcc-booster-registration.jsp). 2.2 SITE PLANNING CONSIDERATIONS 2.2.1 SITE PLANNING Site Considerations The MU is designed to be located indoors to facilitate coupling of BTS signals and power supply connections. The input range of MU RF unit is 10~30 dBm. The site consideration for HUB is listed below:
The maximum fiber maximum path loss of 8dBo. The system delay of the optical system must be taken into consideration when there are neighboring BTS sites overlapping in coverage. 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 system should be well ventilated. The equipment has been designed to operate at the temperature range and humidity level as stated in the product specifications. 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 connected to the MU HUB and RU: coaxial cables, optical fibers, power cable, communication cable, and commissioning cable. 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. 2.2.2 SYSTEM INSTALLATION CHECKLIST Working space available for installation and maintenance for each mounting arrangement. Ensure unrestricted airflow. Ensure earthing point is within reach of the ground wire. (2m; 6 ft. 10 in.). 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. Where appropriate, ensure unused optical fiber connectors are protected. 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 the equipment will be operated within the stated environment (refer to datasheet). Where needed, couple BTS RF signal with a coupler to prevent damaging the equipment. Where appropriate, confirm available of suitably terminated grade of RF and optical fiber. Observe handling of all cables to prevent damage. 2.3 INSTALLATION PROCEDURES 2.3.1 GOODS INWARDS INSPECTION ComFlex was factory tested, inspected, packed, and delivered to the carrier with utmost care. Do not accept shipment from carrier which shows damage or shortage until the carriers agent endorses a statement of the irregularity on the face of the carriers receipt. Without documentary evidence, a claim cannot be processed. Open and check each package against the packing list. For any shortage, contact Comba Telecom Systems. Do not remove items from packing materials until installation. 2.3.2 TOOLS See for a full list of tools required for installation and maintenance. Tool Type use Usage Scenario Impact drill adjustable wrench Pentagonal wrench Drill installation holes to fit M8 expansion Wall hanging bolts Fix the bolt and tighten Wall hanging the M8 hex nut Fixing screw Wall hanging Wall hanging Cross screwdriver Fixing screws, 5mm 2.3.3 PREPARATION Optical Fiber:
Fiber optic cables require proper handling. Do not stretch, puncture, or crush the fiber cable(s) with staples, heavy equipment, doors, etc. Always maintain the minimum bending radius specified by the cable manufacturer. The minimum bend radius is usually 10 times the cables outer diameter. In the case of single optical fiber that is not in a cable, the minimum bending radius to be observed is 3cm. (1.2) . 2.3.4 MU install MU consists of three parts: MU chassis, RFU, and FOU. All components are individually packaged. Install the MU chassis on the rack first, then insert the RFU module and FOU module into the MU chassis 2.3.5 MU chassis mounted in a 19 inch rack The MU chassis is a 19 inch rack mounted device with a height of 6U, which can be installed into a 19 inch rack as follows:
Figure 2: 19 inch rack Step 1: Determine the installation position of the MU chassis on the rack, install cabinet nuts on the corresponding holes on both sides of the rack as shown in Figure 3, and install cabinet screws on the 1U cabinet nuts on both sides. The cabinet screws are only screwed in half the length. Figure 3: Install cabinet nuts and support screws Step 2: Place the MU chassis inside the rack, with the notches at the bottom of the hanging ears on both sides slightly higher than the cabinet screws. Then slide the MU chassis down to make the cabinet screws snap into the notches. Figure 4: Install cabinet nuts and support screws Step 3: Install the remaining 6 cabinet screws on both sides of the MU chassis, tighten the 8 screws (including the pre installed 2 cabinet screws), and complete the installation of the MU chassis. Figure 5: Install cabinet nuts and support screws 2.3.6 RFU and FOU installation Step1: RFU module installation: Remove the baffle of the RFU slot in the MU chassis, insert the RFU module, and tighten the fastening screws on the module (10 RFU modules can be inserted into any of 8 RFU slots) Step2: FOU module installation: Remove the FOU slot baffle from the MU chassis, insert the FOU module, and tighten the fastening screws (FOU module can be inserted into any of the 2 FOU slots) Figure 7: FOU Installation 2.3.7 HUB Wall mounted installation Install HUB onto the wall as follows Step 1: Choose the appropriate wall position:
The wall can safely bear the weight of HUB Capable of comfortable wiring at the top and bottom of the HUB Step 2: Drill installation holes and fix the installation bracket Use a mounting bracket as a template to mark the positions of four installation holes on the wall. Use a 10 impact drill bit to drill installation holes for M8 expansion bolts, with a depth of no less than 50mm. Install the expansion bolts into the wall, and then fix the installation bracket to the wall through the expansion bolts Figure 8: Punch installation holes and fix the installation bracket Step 3: Hang HUB Hang the HUB on the fixed mounting bracket Figure 9: Hang HUB Step 3: Fix HUB and complete installation At the middle of the bottom of the HUB, use an M6X16 screw to secure the HUB chassis and mounting bracket together to complete the installation. Figure 10: Tighten the chassis screws 2.3.8 ARUinstall 1.3.6.1 Hanger installation In the scenario where ARU is fixed with a suspension rod, complete the installation as follows. Step 1: Fix hanger 1 on the suspension rod. Use nuts and washers to fix Hanger 1 to the already set suspension rod on site (nuts and washers need to be provided by oneself, supporting M8 to M12 suspension rods) Figure 11: Hanger 1 mounted on the boom Step 2: Mount Hanger 1 on the boom and secure Hanger 2 to the ARU. Use M4X10 screws to secure mounting bracket 2 to the ARU. Figure 12: ARU mounting rack 2 Step 3: Hang the ARU, tighten the screws, and complete the installation. Hang the ARU on rack 1, tighten the fastening screws on rack 1, and complete the installation. Figure 13: ARU mounting rack 2 1.3.6.2 Installation of wooden beams Step 1: Fix the hanger 1 on the wooden beam. Use four ST6.3X30 wood screws to secure the hanging bracket 1 to the wooden beam. Figure 14: Hanger 1 fixed to wooden beam Step 2: Secure rack 2 to the ARU. Use M4X10 screws to secure mounting bracket 2 to the ARU. Figure 15: ARU MOUNTING RACK 2 Step 3: Hang the ARU, tighten the screws, and complete the installation. Hang the ARU on rack 1, tighten the fastening screws on rack 1, and complete the installation. Figure 16: ARU MOUNTING RACK 2 1.3.6.3 Wall mounted installation Step 1: Fix hanger 1 on the wall. Use hanging bracket 1 as a template to mark the drilling position on the wall, and use a 8 impact drill bit to drill the installation hole for M6 expansion bolt, with a drilling depth of no less than 40mm. Install the expansion bolts into the wall, and then fix the installation bracket to the wall through the expansion bolts Figure 17: Hanger 1 fixed to the wall Step 2: Secure rack 2 to the ARU. Use M4X10 screws to secure mounting bracket 2 to the ARU. Figure 18: ARU MOUNTING RACK 2 Step 3: Hang the ARU, tighten the screws, and complete the installation. Hang the ARU on rack 1, tighten the fastening screws on rack 1, and complete the installation. Figure 19: ARU hanging into rack 2 1.3.6.4 Installation of ceiling gantry Step 1: Fix the screw onto the mounting bracket 2. Fix the screw onto the mounting bracket 2 using M6 nuts and washers. Figure 20: Install bracket 2 onto the screw Step 2: Secure rack 2 to the ARU. Use M4X10 screws to secure mounting bracket 2 to the ARU. Figure 21: Installation rack 2 installed on ARU Step 3: Fix the ARU on the gantry. Use M6 ordinary nuts and butterfly nuts to fix the ARU on the gantry through screws and adjust the appropriate height. Figure 22: Installation rack 2 installed on ARU Step 4: Place the gantry on the ceiling and complete the installation. Adjust the width of the gantry to the appropriate position, and then place the entire structure on the ceiling to complete the installation. Figure 23: Place the gantry on the ceiling 1.3.6.5 Ceiling mounted installation Step 1: Ceiling openings. Use a hole template to create a square hole in the ceiling. Figure 24: Opening square holes in the ceiling Step 2: Loosen the corner part screws. Remove the four plugs from the top cover and loosen the screws that secure the corner pieces. The spacing between the corner pieces to be loosened is determined by the thickness of the ceiling. Figure 25: Loosen the screws of the corner piece Step 3: Place the ARU in the ceiling. Place the ARU into the square hole in the ceiling that has been opened, and use a screwdriver to rotate the fixing screw of the corner piece. The fixing screw will drive the corner piece to rotate and clamp onto the ceiling. Figure 26: Loosen the screws of the corner piece Figure 27: Corner pieces are clamped to the ceiling Step 4: Tighten the screws to complete the installation. Tighten the fixing screws and reinstall the plugs for the four holes to complete the installation. Figure 28: Complete installation 2.4 Equipment power supply MU and HUB require 110V AC power supply, and the preferred power supply method is to use the power line cut off method. This power supply method requires single-phase electricity (110V AC) to be extracted from the three-phase electricity in the distribution cabinet If there is no power cord cutting method available on site, use a socket to take 110V AC power. The power socket must be at a height that is not easily accessible by ordinary people to prevent manual unplugging of the base station power plug. 2.5 Equipment grounding 1) Use the resistance range of a multimeter, with one probe connected to the device's casing screw and one probe connected to the ground wire of the power socket. If the measured resistance value is relatively small (less than 10 ), it is considered that the device has good grounding performance. If the resistance value is too large, it can be investigated from the following aspects Eliminate the problem with the multimeter itself: short circuit the two probes of the multimeter and observe if the resistance value is zero; The resistance value is zero, and the multimeter is normal; Not zero, abnormal multimeter. Is the screw for equipment grounding tightened. Is the grounding wire broken. 2) Touch the device casing with an electric pen. If the electric pen light is on, it indicates that there is current in the equipment casing and there is a leakage situation. Need to check if the equipment grounding is standard. 2.6 Cable connection The fiber length insertion loss between MU and HUB shall not exceed 8dBo, and the 5D cable insertion loss between HUB and the farthest ARU shall not exceed 45dB. After the installation of MU, HUB, and ARU is completed, the installation interface needs to be connected and checked for accuracy before turning on the power and working normally. 2.7 Device identification Each device, as well as wall mounted boxes and meter boxes, should be labeled clearly for future management and maintenance. The labels should be pasted in a visible area on the front of the equipment and equipment. The labels for each cable (such as 5D cable, power cord, tail fiber, etc.) are affixed at 20mm away from the wire head at both ends for easy reading and future management and maintenance. The labeling should be neat and clear. The label of the device should be prominently placed on the device and not affect the overall harmony of the environment to maintain overall aesthetics. Warning signs must be attached to the host and power supply. When there are multiple devices or lines running side by side, the labels must be placed on the same horizontal line 2.8 Power on inspection After powering on, it is possible to observe whether the power supply, optical fiber, etc. are connected properly, and whether the optical fiber and 5D cable are normal can be confirmed through the device indicator light. 2.9 Routine inspection Equipment installation: Check whether the installation position of the equipment matches the design, and whether the installation is firm;
Power supply installation: Check whether the power supply is normal and whether the installation process of the power cord is qualified;
Site labels: Check if the equipment, power supply, and other labels are complete and labeled in a standardized manner;
Cable continuity: Use an optometry pen to test whether the physical link of the tail fiber is normal;
Equipment grounding integrity: Use a multimeter to test the resistance of the grounding wire to ground, etc. Other: After powering on, check if the relevant indicator lights are on, etc 3. Site opening 3.1 Opening process diagram The activation process is shown in the following figure 3.2 Equipment power on and online 3.2.1 Power on the device Before powering on the equipment for testing, it is necessary to carefully read Chapter 2. Check all startDebugging completedRoutine inspection(Installation, connection, power supply, transmission)Check OKEngineering rectificationDevice power on and onlineConfiguration of startup parameters(manual or automatic)Enable testingIs the effect OK?optimizationYESNOYESNO connections during installation to ensure they are correct. After the inspection is completed, the equipment can only be powered on and put into use. 3.2.2 Device online Local WEB enables setting and monitoring of device parameters, and can establish contact between devices and computers through both local and remote online methods. Currently, only local web connectivity is supported: the local computer is directly connected to the OMT port of the device through an Ethernet port and a network cable. The steps are as follows 1. Set the IP address of the local computer to 192.168.1.100 (cannot be 192.168.1.231), the computer network card needs to be set to 100M duplex mode. 2. Open the browser software and enter 192.168.1.231 in the address bar; As shown in the following figure 3. Enter the username and password, click submit to enter the device management interface 3.3 Manual station opening parameter configuration This system provides two ways to start a station, namely automatic and manual. This chapter mainly explains the configuration process of manual station opening. After completing the installation and connection of the device, connect the portable computer, turn on the machine power switch, and wait for the initialization of the monitoring system (i.e. when the RUN/ALM on the monitoring motherboard starts flashing) to start debugging. Users can refer to the following debugging steps for online debugging. 3.3.1 Search for new devices According to the website opening requirements, click the button in the following figure to search for new devices. The button information is as follows:
MU Cards Discover: Discovers new MU cards, such as BDA;
HUB Discover: Discovering a new HUB machine;
Online and status inquiryDebugging completedBDA source parameter settings: operator, center frequency point, SSB frequency point, bandwidth, formatNetwork management parameter settingsCoverage area field strength testing and user antenna adjustmentARU device parameter settings: gain adjustmentDevice status reading: detecting input/output powerIs the output power OK?YESNOSearch for new devicesPOI source parameter setting: gain modulationHUB device parameter setting: communication mode ARU Discover: Discovered a new ARU machine. A: MU discover function is used to detect all slot hardware in MU. B: HUB discover function is used to find the HUB that connect to FOU and automatically provide the site number for each HUB. C: ARU discover function is used to find the ARU which connect to the HUB, and HUB will automatically provide the site number to each ARU. Note: ABC function is necessary for system that be seen by the GUI D: ARU calibrate function is used to automatically calibrate the gain from HUB to ARU to adapt to different insertion loss cables, maintaining a balanced system gain setting. MU discovers It takes about 30 seconds to complete the detection, and will automatically exit the progress bar. Click the home button after completion, you can see that the MU device on the left sidebar appears, and the module information of each slot will appear in the home view. HUB discovers It takes about 30 seconds to complete the detection, and will automatically exit the progress bar. Click the home button after completion, you can see that the HUB on the left sidebar appears, and the HUB information appear in the home view. ARU discover It takes about 120 seconds to complete the detection, and will automatically exit the progress bar. Click the home button after completion, you can see that the ARU on the left sidebar appears, and the ARU position information of each HUB will appear in the home view 3.3.2 BDA LH/HH Source parameter settings Manual 1. Operator settings, set corresponding operators according to user needs. 2. Center frequency point setting 3. SSB frequency setting 4. Carrier bandwidth settings LH BDA Control Interface 1Configure specific switching frequency band states by setting the operating frequency band selectionsetting center frequency and bandwith to configure the operation specifications 2other parameters mainly include ATT and RF switch control. Automatic 1. Click on the LTE SCAN button 2. A window will pop up on the web, waiting for the device to complete the automatic demodulation and frequency scanning function 3. Select the desired channel and click the settings button 4. If there is no good signal source, you can adjust the antenna direction and restart the automatic frequency sweep demodulation function. 3.3.3 FOU parameter settings Can query and set optical signal related parameters and alarms. 3.3.4 HUB Device parameter settings There are 5 tables, including RF related parameters, power supply related parameters, optical signal related parameters, TDD synchronization related parameters, and alarms. HUB Control Interface 1RF info is used to control the uplink and downlink gain of HUB and observe the output power of each port 2Power supply info is Used to control the power switch and current monitoring of 4 ports, which can be used to determine whether the ARU is working properly and the power consumption status 3.3.5 ARU Device parameter settings There are 7 tables, namely 700, 850, 1900, 2100, and alarms. Each frequency band can be adjusted for gain, RF switching, and power reading. ARU Control Interface ARU has a parameter table for each frequency band, which mainly includes switch, attenuation, and power reading values, used to control and monitor the working status of each frequency band The public parameter table of ARU is used to set the attenuation of the common end, that is, when the cable insertion loss is small, by setting the public attenuation, the system gain is too high and the input ARU signal is too strong ARU calibrate 1After clicking the button, the HUB button connected to the device will appear 2After clicking the HUB button, the calibration table for the current HUB will appear 3After clicking the calibration button for a single ARU, the calibration process for a single ARU begins 4After clicking calibration refresh, the device will query the calibration results and display them in the table. 3.3.6 Device status reading To be updated 3.3.7 SNMP Parameter settings To be updated 3.4 Common maintenance operations 3.4.1 Upgrade operation Web: software>web upload>selecting design files>Submit Equipment: software>Devices upload>Select design files>Submit>Upgrade MU/FOU/BDA software upgrade 1 Connect the OMT port of MU using a network cable. 2 Click the bottom choose file, click submit ,click software tab and click Upgrade bottom. 3 wait 3mins, reconnect the web GUI and check the software version. HUB/ARU software upgrade 1 Connect the TEST port of HUB using a network cable. 2 Click the bottom choose file, click submit ,click software tab and click Upgrade bottom. 3 wait 3mins, reconnect the web GUI and check the HUB software version.