GSM WCDMA Lte 900MHz Bandwidth Adjustable Digital Amplifier

Specifications of 900MHz Bandwidth Adjustable Digital Repeater Model:BT-LS37E4-900  The Digital 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 in single system. And its easy installation and maintenance can help carrier get fast return.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.  Features      Aluminum-alloy casing with IP65 protection has high resistance to dust, water and corrodingSoftware defined filter supporting up to 2 sub-bands adjustable in each individual frequency bandLow interference to BTS by adopting linear amplifier with high gain and low noiseAdopting filter with highly selectivity and low insertion loss eliminates interference between uplink and downlink ApplicationsTo expand signal coverage or fill signal blind area where signal is weak or unavailable.Outdoor:Airports, tourism regions, golf courses, tunnels, factories, mining districts, villages, …Indoor:Hotels, exhibition centers, basements, shopping malls, offices, parking lots, …Applications    Application Diagram    Technical SpecificationsItemsSpecificationsSystemGSM/UMTS/LTEWorkingFrequency(Customized)Uplink890~915MHzDownlink935~960MHzBandwidth4 sub-bands, each 0.2~10MHz Tune BandwidthMaximum Gain85±3dBMaximum Output Power Uplink30dBmDownlink37dBmALCSupportGain Adjustment Range0-31dB in step of 1dBVoltage Standing Wave Ratio≤ 1.5Maximum Input power(Non-destructive)0dBmError Vector Magnitude(EVM)≤ 8%Peak Code Doman Error(PEDE)≤ -35dBSpurious Emission9KHz~1GHz ≤ -30dBm1GHz~12.75GHz ≤ -36dBmThird-order Inter-modulationComply with 3GPP TS 25.106 V6.0.0Noise Figure≤ 8dBSystem Delay≤ 8.0μSecI/O Impedance50ΩRF ConnectorN-Type (Female)Temperature RangeOperation: -25°C ~ + 55°CRelative Humidity Range≤ 95% (non condensing)Power Supply (customized)AC220V,50/60HzDimensions428*328*175mmWeight≤15kgNMS Monitoring Function(Optional)Real-time alarm for door status, temperature, power supply, VSWR, etc;Remote control such as turn on/off, increasing/decreasing output power, etc;Real-time status for output/input power, UL/DL gain, all status of repeater etc.    Installation & Commissioning1.1 Installation1.1.1 Steps for mounting on the Pole  At Donor site, install the FSR Donor Unit, Donor Antenna, Link Antenna, and RF cable as per specified plan and site layout. FSR Donor Unit can be pole-mounted using the brackets as shown below.Place M8 screws through the holes of H type brackets as shown in figure 1Fix combiner onto the H type brackets with M6 screwsFix H type brackets with combiner installed onto the pole with U type brackets and M8 screws  Figure 1 Repeater Mounting Bracket Orient the Link Antenna of Donor Site to the direction of the Remote Site.Use Site Master to measure the VSWR of the RF cable from the Link Antenna. The value should be less than 1.5; Otherwise, check the connectors and the installation of the cable.Start Commissioning the Donor Unit .Proceed to the Remote Site.At Remote site, install the FSR Remote Unit, Link Antenna, Coverage Antenna, and RF cables. Remote Unit can be wall mounted or pole mounted depending on the approved plan.Orient the Remote Link Antenna to the direction of the Donor Site.Using Spectrum Analyzer, check the Link RSL; adjust the Link Antennas of both Donor and Remote until the required RSL is achieved. Link RSL can be computed using conventional path calculation method.Then, measure the VSWR of the RF cables connecting with the Link Antenna of Remote Unit. The value should be less than 1.5, otherwise, check the connectors and the installation of the cable.Start Commissioning the Remote Unit .1.1.2 Steps for mounting on the wall At Donor site, install the FSR Donor Unit, Donor Antenna, Link Antenna, and RF cable as per specified plan and site layout. FSR Donor Unit can be wall-mounted using the brackets as shown below.Make four marks on the wall according to the dimension shown as figure 2Drill four holes at position markedFix two pcs H type brackets on the wall with M8 expansion screwsFix combiner onto the brackets with M6 screws Figure 2 Repeater Mounting Bracket     6. The following steps are the same with step 4 to 12 for mounting on the Pole.   1.2 CommissioningConnect the RF cable from Donor Antenna to the spectrum analyzer and check if the Donor Antenna is receiving the correct frequency; and then measure the signal level of the said frequency (RSL). Adjust the antenna to make the readings approach the recorded value on the survey report. Record all readings.Inside the repeater, disconnect the uplink duplexer to the ICS module so as to cut any signal coming from air going to the uplink duplexer an