FCC ID : U88-GRS-825DM-BC ATTACHMENT E.
- User Manual -
SAN 136-1, AMI-RI, BUBAL-EUP, ICHEON-SI, KYOUNGKI-DO, 467-701, KOREA TEL:+82 31 639 8517 FAX:+82 31 639 8525 www.hct.co.kr Report No. : HCT-RF09-0416 1/1 HCT CO., LTD. GRS-825DM-BC RF Repeater User Manual January, 2009 Version 1.0
- INDEX -
Bell Mobility User Manual In-building Repeater 1. SUMMARY .................................................................................................................3 2. SYSTEM CONFIGURATION.....................................................................................5 2.1 In-buildingRepeater Service Network Configuration.......................................................... 5 2.2 System Design and Operation ............................................................................................. 6 2.2.1 System Design .............................................................................................................................................. 6 2.2.2 Downlink/ Uplink Path ................................................................................................................................. 8 2.2.3 Frequency Selection..................................................................................................................................... 9 3. SPECIFICATIONS...................................................................................................10 3.1 System Capacity ................................................................................................................10 3.2 System Specifications........................................................................................................11 3.3 Electrical and Environmental Specifications .....................................................................12 3.4 Functions ...........................................................................................................................13 4. SETUP ......................................................................................................................15 5. IC INFORMATION..................................................................................................25 2 1. Summary Bell Mobility User Manual In-building Repeater GRS-825DM-BC is a In-building repeater, which has been designed to improve signals in blanket/shadow areas inside of buildings to transmit Bell Mobilitys signals at nd 800MHz frequencies. Characteristics 800MHz Band: 80dB Gain with 25dBm maximum composite output power. Bandwidth:
- Downlink 880MHz~894MHz, Uplink 835MHz~849MHz (14MHz Band)
- See page 11 for more details. 3 Characteristics Bell Mobility User Manual In-building Repeater GSTs In-buildingrepeater is basically a combination of 800MHz 25dBm repeaters. Functional modules are classified as below:
- Cavity Filters to combine the Duplex input/output signals for: 800MHz.
LNA (Low Noise Amplifier)
Gain Block to transmit output signal to PAM (Power Amplifier Module) Cavity Filter Converter Modules
- PAM Module to amplify output power linearly in accordance with optimal repeater output power.
- Power Supply Unit
- Controller to monitor each module in repeater. Abbreviation PAM: POWER AMPLIFIER MODULE LNA: LOW NOISE AMPLIFIER AGC: AUTO GAIN CONTROL ALC: AUTO LIMIT CONTROL Caution: Risk of explosion if battery on the controller board is replaced by an incorrect type.
- Statement indicating that the socket-outlet shall be installed near the equipment and shall be easily accessible.
- This equipment is indoor use and all thecommunication wirings are limited to inside of the building. 4 2. System Configuration 2.1 In-building Repeater Service Network Configuration Bell Mobility User Manual In-building Repeater
<Pic.1> In-building Repeater Service Organization 5 2.2 System Design and Operation 2.2.1 System Design Bell Mobility User Manual In-building Repeater
<Pic.2> In-building Repeater Internal Design 6 Bell Mobility User Manual In-building Repeater
<Pic.3>> In-building Repeater Port Design 7 2.2.2 Downlink/ Uplink Path Bell Mobility User Manual In-building Repeater In-building RF Repeater simutaneously operates at 800MHz frequencies and has one Donor ANT Port for aiming at each BTS, and one Server Port for the In-building coverage. Therefore the Cavity Filters applied to the Front End of Donor ANT Port and Server ANT Port consists of DPX, has DPX which multiplexes all Tx/Rx into one path.
<Pic.4> In-buildingIn-building Repeater Block Diagram 8 2.2.3 800MHz Frequency Selection Bell Mobility User Manual In-building Repeater Lower B (5MHz) Lower B (5MHz) Upper B (5MHz) Upper B (5MHz) Blank Blank B B 880 880 885 885 890 890 891.5 891.5 894 MHz 894 MHz 800MHz Downlink Frequency Table Lower B (5MHz) Lower B (5MHz) Upper B (5MHz) Upper B (5MHz) Blank Blank B B 835 835 840 840 845 845 846.6 846.6 849 MHz 849 MHz 800MHz Uplink Frequency Table
<Pic.6 > 800MHz Band Structure Configuration 800MHz Band Select Table B (10MHz) Lower B (5MHz) Upper B (5MHz) B (2.5MHz) O O O O O O 1 2 3 4 5 6 7 O O O O 9 3. SPECIFICATIONS 3.1 System Capacity Item Frequency Port DOWNLINK UPLINK Donor Server Capacity Bandwidth Output Power
(ANT Port) Bell Mobility User Manual In-building Repeater Specification 880MHz ~ 894MHz 835MHz ~ 849MHz Tx / Rx Tx / Rx OMNI 14MHz
+25dBm / 316mW Total Remark 14MHz 14MHz DPX DPX 10 3.2 System Specifications Bell Mobility User Manual In-building Repeater Parameter Specification Remark 1dB BW marker: 29dB marker: 39dB RBW: 30MHz Test frequency measured from band edge B+B B B Lower B or Upper B Range Adjust Step Adjust Accuracy 800MHz F0750kHz F01.98MHz Band Select Gain Propagation Delay Spurious Emission Out Band Spurious Emission Flatness Return Loss / VSWR Uplink Noise Figure Roll off 1.5MHz 3MHz Characteristic Impedance DL: 880~894MHz UL: 835~849MHz DL: 880 ~ 890MHz UL: 835 ~ 845MHz DL: 891.5 ~ 894MHz UL: 846.5 ~ 849MHz DL: 880 ~ 885MHz UL: 835 ~ 840MHz Or DL: 885 ~ 890MHz UL: 840 ~ 845MHz 50dB ~ 80dB 1.0dB 0.5dB 6.0us
-45dBc
-50dBc
-13dBm 1.25dB 14dB / 1.5 : 1 5dB @ Max gain 8dB @ Min gain 40dBc
> 50dBc 50 11 3.3 Electrical and Environmental Specifications Item RF Connector Power Connector AC DC AC Supply Out Dimension Net Weight Material Module Cabinet Operation Temperature Humidity Specification N-Type Female MS3102A-10SL (3Pin) SCK-16-2P (2Pin) AC 120V 60Hz 3.0A 450(L)*410(W)*199(H) 17.6 AL6063S-T5 AL5052P 5 ~ +45 5% ~ 95%
Dust Resistance TELCORDIA GR63-CORE Vibration Resistance Environmental specifications MTBF 1G, 10~150Hz 0.1 Octaves/min NEMA1 100,000 hours Bell Mobility User Manual In-building Repeater Remark Donor & Server ANT Port MIL-C-5015 Type Circular Type cm kgs Convection cooling Non-condensing 12 Bell Mobility User Manual In-building Repeater 3.4 Functions Parameter Gain Control Specification Adjustable DL and UL Gain range 50~80dB (800MHz) Display default Gain and current Gain function AGS (Auto Gain Setting) Use for convenient Set-up AGS Auto Gain Setting AGC Auto Gain Control ALC Auto Limit Control It always operates in Downlink AGC ON status To maintain same Downlink output power despite flexible input signal strength. To add or subtract Attenuation level referring to AGC Power Limit level. Used with the Automatic Setup (Auto Gain Setting) To limit output power as far as default range Used for DAS configuration and when oscillation/isolation is a concern Automatic Gain decrement when output power of repeater is higher than default level Automatic Gain recovery when output power of repeater is reduced. Shutdown when output power is higher than default level in Minimum Gain Automatic Recovery Algorithm conversion after Shutdown status Band Select B+B Band (14MHz) 13 Bell Mobility User Manual In-building Repeater Power Monitoring Function Monitoring repeaters output level Oscillation Check Spurious Emission Alarm Isolation Check in initial set up or Reset Monitoring Oscillation comparing to minimum/maximum Noise Floor level When Oscillation occurred, repeater attempts to stabilize Isolation through Gain control function. Shutdown repeater when Oscillation still occurs in Minimum Gain Automatic Recovery Algorithm conversion after Shutdown status Noise Floor Observation in case of 2.25MHz down at the center In case of Noise level > 13dBm, Spurious Emission is stabilized automatically In case of Oscillation Spurious Emission Alarming in Minimum Gain, repeater will be shutdown Automatically Switch to Recovery Algorithm at Shutdown DL Input control Monitoring Donor ANT input power of DL Automatic Recovery Security Temperature Control VSWR Monitoring IP address When repeater is shutdown, it periodically recovers output power of repeater then monitors alarming Support HTTPS for Web Browser security User authentication through User ID and Password Monitoring temperature of repeater Maximum and minimum set up is possible. Shutdown in over temperature Automatic recovery after temperature becomes normal. (Hysteresis 10degree) Monitoring VSWR of Donor ANT Port (Every 90 seconds) Reporting VSWR Alarm and Shutdown when the rate is 3:1 Automatic Recovery Algorithm conversion after Shutdown status When in PPP reconnection, E-mail which includes HTML to connect to newly assigned IP Address, report via E-mail reports to operator. DHCP Client DHCP Server Web GUI SNMP Agent Automatic IP assignment Server function for automatic IP assignment Remote and local user browser support through Web Browser NMS report via SNMPv2 Trap LED Display LED displays power and operation status on front side of repeater system. Input and Output signal levels are verified by LED bars. 14 4. SETUP 4.1. Equipment Needed for In-buildingRepeater Setup Bell Mobility User Manual In-building Repeater Parameter Item Quantity Remark Major Component Repeater GRS-DUO24M-BC Mounting Bracket CD which contains User Manual V.1.0 and Installation Guide V.1.0 Ethernet Cable 6.6ft (2m) Ground Cable 6.6ft (2m) Ground Sems Screw M4 x 8mm Bracket Sems Screw M6 x 16mm Lag Screw 12.7mm x 50.8mm Anchor Bolt Set 12.7mm x 50.8mm Donor ANT Server ANT Antenna connection Cable Spectrum Analyzer Additional Components Antenna RF Cable Testing and Measuring Equipment 1 EA 1 EA 1 EA 1 EA 1 EA 4 EA 4 EA 4 EA 4 EA 1 EA 1 EA TBD 1 EA Provided by GST Provided by GST Not Included Not Included Not Included 4.1.1 Checkpoints before turning on the Repeater 1) System Power Check: AC electrical power to the repeater should be 110V, input electricity only after power verification. 2) Input RF Signal Range: Optimal input RSSI into the repeater is -55dBm ~ -25dBm for 800MHz. User should verify input condition of Donor ANT. If the input RSSI exceeds -20dBm, then external attenuators should be used. 3) Isolation check between DONOR/SERVER ANT: Isolation condition of this equipment is 87dBc (Gain+7dB) for 800MHz. User should check its condition before installation. 15 4.1.3 System Setup 1) This equipment is basically wall mountable. 2) Installer will have to connect the power supply (after verifying the input power) and RF cable Bell Mobility User Manual In-building Repeater to the Repeater and then it will be ready to use. 3) For grounding, there is a grounding terminal in main power supply which will be plugged into power outlet. There is also a separate grounding terminal on the repeater which should be connected to the on-site grounding terminal to ensure proper grounding. 4) Mounting of repeater should be done by at least two technicians to ensure a safe and proper installation. 16 4.1.4 Open for Service 1) Check points before open:
Bell Mobility User Manual In-building Repeater a. Verification of system installation status:
- Electricity, In/Out antennas, cable connection, and equipment mount status. b. Verification of system accessories:
- User should check all necessary accessories. c. Check receipt signal level
- Installer should check whether environmental conditions are in accordance with system specification to ensure that system operation will be optimized. 2) Check points after open:
a. Check external LED 1) RUN: Green light ON (Off: all lights off) 2) ALARM: Green light in normal status, Red light in alarming 3) SHUT DOWN: Green light in normal status, Red light in Shutdown status 800MHz 25dBm:
Number of LED bars on front side of repeater will show input signal level. Less than ~ -85dBm: LED 1bar
-84dBm~-67dBm: LED 2 bars
-66dBm~-49dBm: LED 3 bars
-48dBm~-31dBm: LED 4 bars More than -30dBm: LED 5 bars Number of LED bars on front side of repeater will show output power signal level. Less than +5dBm: LED 1 Bar
+6dBm ~ +10dBm: LED 2 Bar
+11dBm ~ +15dBm: LED 3 Bar
+16dBm ~ +20dBm: LED 4 Bar More than +21dBm: LED 5 Bar 17 Bell Mobility User Manual In-building Repeater
<Pic.9> GRS-825DM-BC In-Building Repeater Front LED b. Verification of operation status User should verify following status with Output monitoring terminal, which is provided by Spectrum Analyzer:
- Output power generation status, system spurious emission characteristics. c. Verification of signal quality and strength in service area User should verify signal strength and quality of in-service coverage area by using cell phone or other measuring device. d. Verification of upper-level NMS operation status 4.2 Troubleshooting In case of abnormal operation, technician should diagnose abnormality via remote access or directly connecting to repeater using Ethernet cable. If technician is required to conduct repairs due to major alarm, repeater should first be powered off, and then technician should prepare the proper measurement equipment before trying to fix the problem. In most cases of major repairs, GST will simply replace the unit and conduct repairs at the appropriate facility. 4.2.1 Necessary Testing and Measuring Equipment 18 Bell Mobility User Manual In-building Repeater a. RF Power Meter: 10Watt Max, 50ohm b. Signal Generator: 3GHz c. Spectrum Analyzer: 3GHz d. Multi-Meter 4.2.2 Notice a. Troubleshooting should be performed by a trained technician. b. Parts that seem to be not used should not be disassembled. c. While troubleshooting, technician should use attenuator to check RF Signal output. 4.2.3 Simple Troubleshooting Method a. Verify LED Status, both on external LEDs as well as internal module LEDs
- Normal operation: Green light On. Alarming: Red LED on b. Technician should check external and internal connectors to ensure that all connections are tightly secure. These connectors should be cleaned regularly. c . If technician thinks there is a serious problem, call after sales team for over-the-
phone technical support. 1-866-9-GST-USA (1-866-947-8872) 19 4.2.4 Troubleshooting Guide Bell Mobility User Manual In-building Repeater Item Note before system operation Note before system operation Note before system operation Check in Advance Check after open Check Point Trouble shooting
* System Input power range
* System Gain Input Level Downlink (800MHz)
-55dBm/Total ~ -25dBm/Total Uplink (800MHz)
-55dBm/Total ~ -25dBm/Total Gain Downlink (800MHz) Uplink (800MHz) 50 ~ 80dB 50 ~ 80dB
* Output power at Server port Output power Downlink (800MHz) 25dBm/Total Uplink (800MHz) 25dBm/Total
* Please check quantity of all accessories with specification
* Check points before open for service before you set up.
* Fit cable length in accordance with field condition.
* Set up 800MHz Donor antenna to secure Isolation (More
* Check points after open for service than 87dBc)
* Check following status
- Verify that the antennas are securely mounted and pointed in the correct directions
- Connection status between antennas and RF cable
- Verify that the Repeater is securely mounted
- Proper AC power status
- Grounding status of electrical circuit
- Coaxial cable (RF) construction status
- Connectors and combiners connection status
- Cable connection status against leakage of water 20 4.2.5 Troubleshooting Guide Related to RF Bell Mobility User Manual In-building Repeater Check Point Troubleshooting
* Check Electricity Cord connection status
* Re-plug in AC power cord
* Checking electricity input to AC power outlet.
* Please verify AC power input by using DVM (Digital Voltage Meter) Symptom When repeater does not work properly When repeater does not work properly When in alarming When in alarming When in alarming
* DL over-input alarm
* DL over-output alarm
* UL over-output alarm When in alarming
* VSWR alarm
* IF Module alarm When in alarming
* Please Check following status
- Proper maximum output power limit level
- BTS input level (Spectrum Level)
- Input RSSI value on Status Page
- Downlink Attenuation level
* Please reset AC power upon completing Alarm troubleshooting
* Make sure output power is operating normally.
* Reset AC power upon completing Alarm troubleshooting.
* Please make sure output level is operating normally
* Please reset AC power upon completing Alarm troubleshooting
* Check following status
- Antenna port connection
- Verify that cable from I/O filter is secure.
* Disconnect all antenna cables from the repeater, terminate all antenna ports with 50Ohm terms and then reboot the repeater. If the VSWR alarm still occurs then equipment should be replaced. If the alarm goes away, then the VSWR issue is somewhere in the cabling or connectors.
* Reset AC power upon completing Alarm troubleshooting
* Verify IF Module LED is On.
* When LED is Off, module should be defective. 21 Bell Mobility User Manual In-building Repeater
* DL, UL PAM alarm
* DC matter/Current alarm
* Reset AC power upon completing Alarm troubleshooting
* Verify DC power by using DVM (Digital Voltage Meter)
* Reset AC power upon completing Alarm troubleshooting. When in alarming When in alarming When in alarming When in alarming When in alarming When in alarming When in alarming
* UL Oscillation
* DL / UL LNA alarm
* Temperature alarm
* DL low-input alarm
* DL low-output alarm When in alarming
* RF OFF When output power is no longer problem
* Technician should verify category of alarm at the front side of repeater. 22
* Check Isolation between Donor and Server.
* Reset AC power upon completing Alarm troubleshooting
* Check connection status of LNA.
* Reset AC power upon completing Alarm troubleshooting
* Check following status:
- Setting level of maximum temperature limit
- Temperature offset is normal or not.
- Circumstances of temperature.
* Reset AC power upon completing Alarm troubleshooting
* Reset AC power upon completing Alarm troubleshooting
* Check following status
- Output power level is normal or not.
- Whether minimum output limit level is normal.
- Compare RSSI to maximum gain.
* Reset AC power upon completing Alarm troubleshooting
* Verify that the HPAs are On.
* Reset AC power upon completing Alarm troubleshooting
* When Red light on the Shutdown LED, technician should troubleshoot the alarm via Notebook computer. Bell Mobility User Manual In-building Repeater
* Technician should connect antenna with output port of repeater.
* Please make sure all connectors are fastened
* Reconnect the connector.
* Change it if the connector is defective.
* Check the input level
* Increase output power or check input change of BTS side.
* Check Gain of the unit
* Cable connector loose.
* Check input signal strength in the service area
* If the Gain is different from normal level, please contact A/S team.
* It is possible for connectors to get too tight and damage the equipment or throughput.
* Please contact installer or service provider upon verification.
* Increase output power level of repeater by adjusting attenuation level.
* If input signal strength is not a problem, please check delay of calling time.
* Increase output level of Uplink signal, then set to optimal level.
* Contact network management team or service provider
* Check RSSI signal strength When output power is no longer problem When output power is no longer problem When output power is no longer problem When output power is no longer problem In case of dropped call or bad signal after set up In case of drop call or bad signal after set up In case of dropped call or bad signal after setup 23 In case Output Signal wavelength is not shown flat or looks like oscillation
* Check connection fastened between antenna and cable
(Signal wavelength should be flat and stable if technicians shake CABLE. If not, it is connection problem.) Same as above
* Input level change or module overheating. Same as above
* Please check VSWR of the Cable is normal. Bell Mobility User Manual In-building Repeater
* If connection is not proper, reconnect cable and connector and then check the output power again.
* Check input level from BTS side.
* Check performance of each module.
(Diagnosed by A/S team.)
* Change to normal Cable. 4.2.6 Troubleshooting Guide Related to NMS Symptom Check Points Troubleshooting Link Fail
* Communication problem Link Fail Link Fail
* CLI Connection, Cable status check
* CLI connection Check by USB to Serial Cable
* In case of Ethernet, verify IP addressing, DHCP function, and that Cookies are deleted.
* Verify that a crossover Ethernet cable is being used.
* Make sure 1:1 connection.
* Follow instructions in the installation guide for this connection procedure.
* Please verify Port number of PC communication.
* Please check Cable connection status. 24 Bell Mobility User Manual In-building Repeater 5. IC Information General Information Transmitter Antenna This device has been designed to operate with the antennas listed below, and having a maximum gain of 80 dB. Antennas not included in this list or having a gain greater that cable loss of Antenna to Repeater t han 12 dB are strictly prohibited for use with this device. The required antenna impedance is 50 ohms. User Manual Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) t his device must accept any interference, including interference that may cause undesired operation of the device. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen t hat the equivalent isotropically radiated power (e.i.r.p.) is not more than that permitted for successful co mmunication. General Standard Specifications User Manual
(a) The nominal passband gain (dB); Cellular: 80.0 dB
(b) The nominal bandwidth; Cellular : 15 MHz
(c) The rated mean output power; Cellular : 25.0 dBm
(d) The input and output impedances; 50 ohms
(e) The following notice: "The Manufacturer's rated output power of this equipment is for single carrier o peration. For situations when multiple carrier signals are present, the rating would have to be reduced by 3.5 dB, especially where the output signal is re-radiated and can cause interference to adjacent band use rs. This power reduction is to be by means of input power or gain reduction and not by an attenuator at t he output of the device."
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