Tri-Band Repeater (900/1800/2100) User Manual 2015 February Information in this manual is subject to change without notice http:www.redutelco.com 2009 Redutelco All rights reserved 1
Table of Contents 1. Description... 3 2. Technical Specifications... 5 3. System Diagram... 6 3.1 Product Features... 7 3.2 Applications Example-- Shadow Coverage... 7 4. Operation... 8 5. Installation... 9 5.1 Donor Antenna Installation... 9 5.2 Cable layout... 10 5.3 Isolation and Separation... 12 PLEASE READ THE QUICK START GUIDE AND FOLLOW THE STEPS CAREFULLY. THIS QUICK START GUIDE WILL HELP YOU INSTALL THE DEVICE PROPERLY AND AVOID IMPROPER USAGE. IF YOU HAVE OTHER INQUIRES OR NEED FURTHER TECHNICAL SUPPORT, PLEASE CONTACTH WITH US IVA EMAIL : INFO@REDUTELCO.COM http:www.redutelco.com 2009 Redutelco All rights reserved 2
1. Description The TriBand Selective Repeater is designed to provide a more cost-effective solution than adding a new Base Transceiver Station (BTS) to improve signal coverage and communication quality It can be equipped with three sub bands for three service network (900/1800/2100)to provide outdoor coverage for mobile signals. The repeater is working as a relay between the BTS and mobiles. It receives the low-power signal from BTS via the Donor Antenna, linearly amplifies the signal and then retransmits it via the Coverage Antenna to the weak/blind coverage area. And the mobile signal is also amplified and retransmitted to the BTS via the opposite direction. No. Item Usage Note http:www.redutelco.com 2009 Redutelco All rights reserved 3
1 BTS Tower(operator base station tower) Donor site, provide 2G/3G signal by operator Ex. Vodafone, Orange 2 External Antenna(Outdoor antenna) Donor antenna, Receive signal from BTS tower Ex. Log period antenna, Yagi antenna 3 Cable Connection between antenna and repeater Ex. LMR400,LMR600, 50-5D 4 Repeater Amplifies Signal from BTS via donor antenna Ex. Single band, dual band, triband 5 Internal Antenna) Antenna(Indoor Service antenna, transmit the signal to coverage area after repeater Ex. panel antenna. It will reduce site deployment cost by using one tri band donor antenna, one tri band service antenna, and tri band repeaters in one enclosure. It is applied to expand signal coverage or fill signal blind area where signal is weak, such as shop mall, bus station, factory, hotel and village etc. http:www.redutelco.com 2009 Redutelco All rights reserved 4
2. Technical Specifications Items Network(Customized) Frequency (Customized) Specification Uplink Downlink EGSM/ 3G 925MHz~960MHz 880MHz~915MHz 1805MHz~1880MHz 1710MHz~1785MHz 2110MHz~2170MHz 1920MHz~1980MHz Gain (Customized) 85 db 90 db Output Power (Customized) 27±2 dbm 33±2 dbm Gain Adjustment Range Gain Adjust precision ALC Scope In-Band Ripple Out-of-Band Suppression I/O Impedance 30 db 0~10dB/±1dB#10~20dB/±1.5dB#20~31dB/±2dB 20dB 3 db ±600kHz > 30dB, ±1MHz > 40dB, ±5MHz > 50dB, 50 Ω VSWR 1.5 Load VSWR Tolerance 20:1 Noise Figure Inter-modulation Attenuation Spurious Emission System Delay Max Input Power Level(1minute) 5dB 45dBc -36dBm(9KHz~1GHz)/ -30dBm(1~12.75GHz) 5μs -10dBm RF Connector N-Type (Female) Temperature Range Operation: -25 C ~ + 55 C;Storage: -30 C ~ +60 C Relative humidity 5~95% RH Power consumption 100W Power Supply (Customized) AC100~240V Power Supply socket (Customized) BP3 Type Dimensions Weight Cabinet Color Installation Monitor/Setting Parameter 420mm 330mm 240mm 15kg Silver white Wall-mounted Inquiry: Power, Gain Set: ATT http:www.redutelco.com 2009 Redutelco All rights reserved 5
3. System Diagram The RF link (donor) towards the base station is typically fed from an outdoor antenna while the coverage area is fed by an indoor antenna The signal from the base station is received via thetriband Donor antenna, then forwarded through a Combiner, is amplified in a low noise amplifier (LNA), and enters the band selective amplifier board (BSA). The first mixer stage on the BSA amplifier board, which is controlled by a synthesizer, converts the received frequency down to the IF frequency. The signal is then filtered by an IF SAW band-pass filter and amplified before it is fed to the second mixer stage, controlled by the same synthesizer as the previous one, for converting back to the original frequency. The output signal from the mixer is then amplified in the power amplifier, which is controlled by the CU(Control Unit board).the output signal passes a Quad filter (QPX), before it is fed to the triband MS antenna which retransmits the signal at the same frequency to the aim areas. http:www.redutelco.com 2009 Redutelco All rights reserved 6
3.1 Product Features High selectivity hence excellent out-of-band signals rejection Smart Automatic Level Control (ALC) to reduce interference to BTS Linear power amplification to effectively suppress inter-modulation and spurious emission Independence control gain & inspect alarm information for each band An alarm interface with unique color LEDs to indicate alarm of power supply alarm, VSWR and low signal level Dual ports and full duplex design System Monitor through RJ45 port with easy to view GUI Designed for indoor /outdoor applications 3.2 Applications Example-- Shadow Coverage A valley is shaded by hills. There is a base station 5 kilometres away, but the lowest signal strength in the valley is less than 100dBm. A mast used for other purposes is available for a repeater installation. The mast height is 42 meter and it is located on a hill. The scenario is illustrated as following picture. 1) The signal strength (includes donor antenna) from donor BTS must be 5dB larger than from neighbour BTs in GSM network and larger>-50dbm, so the repeater can amplifier in high efficiency with full output power. 2) The donor antenna should have line of sight (LOS) with the BTS antenna. If the signal http:www.redutelco.com 2009 Redutelco All rights reserved 7
strength is adequate, LOS may in some cases not be necessary. 3) Donor antenna gains are typically 18 to 25 db, and have a horizontal and vertical beam width of less than 30 to correctly select the donor BTS. 4) There is large physical separation between the antennas in order to prevent degradation of signal quality and risk of oscillation (Antenna isolation). Ways to achieve this can be usage of highly directional antennas with good front-to-back interference ratio or external shielding between the antennas. Another option is to use a Frequency Translating Repeater or ICS repeater. 4. Operation Power Sys-1 Sys-2 Sys-3 220V Power supply switch on 850M, Alarm when output power is higher than max output power 2600M, Alarm when output power is higher than max output power Not used Push Button Select to change current system + Increase UL/DL Gain - Decrease UL/DL Gain - Put one load to MS port as below diagram - Power switch ON. - Select system via Button SEL in monitor board. - Decrease Band 850 gain(downlink) until sys1 not alarm if BTS signal is too strong (850 M DL LNA module) http:www.redutelco.com 2009 Redutelco All rights reserved 8
- Decrease Band 2600 gain(downlink) until sys1 not alarm if BTS signal is too strong (2600M DL LNA module) - Set uplink gain=downlink gain-5 for each band. (UL PA module) - - Remove load and connect MS port to indoor antennas system. - Check LED status, if LED RED ON, it means there is antenna isolation problem, in this case, we do: Move indoor antenna far from external antenna. Reduce repeater gain according to BAND LED. 5. Installation 5.1 Donor Antenna Installation Find a good spot to mount the antenna, such as a chimney or rooftop, to avoid trees, building, and any metal objects. Find the location and best angle for getting the strongest signal from the base station. The antenna must be directed towards the nearest base station. It requires a minimum signal level in the place where install the donor antenna. Failure to provide sufficient input signal will only result in a poor coverage inside the building for this repeater system. To check signal levels, use the phones in the place where antenna be install (on the roof) and observe the signal bars on the phone. The Donor (outside) antenna should be placed in the location where you get the most signal. http:www.redutelco.com 2009 Redutelco All rights reserved 9
Temporarily mount the Donor (outside) antenna in that location. It may need to adjust and move the antenna later. Fine-tuning the antenna orientation (in horizontal/vertical position or 45 degree angle position) to have the best signal strength (after repeater on) 5.2 Cable layout Run one coaxial cable into the building to repeater location where you can also get standard 220/110VAC power for the repeater. Connect coaxial cable between the outdoor antenna and the repeater BTS port. http:www.redutelco.com 2009 Redutelco All rights reserved 10
Cable layout through walls U Dripping bend Run one coaxial cable inside the building. Connect the coaxial cable between the indoor antenna and the repeater MS port. RF connectors should be link tighten; Cable bending radium meets technical requirement http:www.redutelco.com 2009 Redutelco All rights reserved 11
5.3 Isolation and Separation Isolation refers to the proper distance or separation needed to keep the Donor antenna signal pattern and the Coverage antenna signal pattern away from each other. Isolation becomes particularly problematic when Omni-directional antennas are used for both the Donor and the Coverage antennas. Since these antennas transmit in a circle (or more accurately a sphere) it is very easy for these spheres to overlap and thus negate the repeater system. http:www.redutelco.com 2009 Redutelco All rights reserved 12