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Frequency Shift Repeater |
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Tetra800MHz FSR |
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Description：
Helios Tetra800MHz Frequency Shifting Repeaters system is designed to solve repeaters and reduce investment for the areas where fiber optic or dedicated cable is not allowed.
The Frequency Shifting Repeaters system consists of two parts: Donor Unit and Remote Unit. The Donor Unit receives the BTS signal via open air radio frequency (RF) transmission or direct couple closed to BTS, then coverts it from the working channel to transmission channel that is out of working frequency band, and transmits the amplified signal to the Remote Unit that will reconvert the signal to the working channel and provide signal to the areas where network coverage is inadequate.problems of weak mobile signal, which can expand more coverage than RF
Features：
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Comply with relevant regulation spectrum usage.
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Aluminum-alloy casing with IP65 protection.
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Compact design, cool system without fan.
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Best solution to eliminate mutual interference due to sharing the same frequency.
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ALC and AGC to ensure stable operation.
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Easy to install on wall or pole.
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Highly selective channel selector can process 2 or 4 or 6 channels simultaneously.
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Max transmission distance between Donor Unit and Remote Unit is 20KM.
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Adopting filter with highly selectivity and low insertion loss eliminates interference between uplink and downlink.
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2 RS-232 ports provide links to laptop for local test or to built-in wireless modem for communication with the NMS.
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High gain linear power amplifier technique with reliable performance.
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Eliminate isolation requirement in antenna installation.
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Easy to choose installation site.
Application：
To expand signal coverage of fill signal blind area where Tetra signal is weak or unavailable.
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Outdoor: Airports, Tourism Regions, Golf Courses, Tunnels, Factories, Mining Districts, Villages, ……
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Indoor: Hotels, Exhibition Centers, Basements, Shopping Malls, Offices, Packing Lots, ……
Technical Specification：
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Frequency Range |
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806-821MHz/851-866MHz (Customized) |
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Tranmission Distance |
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Max. 20KM |
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Transmission Frequency |
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Customized |
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Downlink Output Power |
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Donor：Min 30dBm-40dBm(1W-10W)
Remote：Min. 37dBm – 43dBm (5W – 20W) |
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Gain |
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Donor：Min. 45dB ；Remote：Min. 90dB |
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AGC Control Range |
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Min. 40dB (+/-2dB) |
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Spurious Emission 9KHz-1GHz |
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Max. -36dBm |
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Spurious Emission 1KHz-12.75GHz |
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Max. -30dBm |
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RF Connector |
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N-Type Female |
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I/O Impedance |
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50ohm |
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Group Time Delay |
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5uS |
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Temperature Range |
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-30℃ to +55℃ |
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Relative Humidity |
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Max 95% |
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Power Supply |
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DC -48V or AC220V |
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NMS Monitor Function |
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Real-time alarm for door Status, Temperature, Power Supply, VSWR, Output Power, Gain, Uplink ATT, Downlink ATT and so on. |
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Remote Control Module |
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RS232 + Modem |
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Approved Standard |
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ETSI EN 300 609-4
ETSI EN 300 489-1
ETSI EN 60950 | |
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System Diagram：
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