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Fujian Helios Technologies Co., Ltd.

Amplifier, Repeater, Booster manufacturer / supplier in China, offering 95dBm Tetra Digital Frequency Shifting Repeater, Tetra Digital Frequency Shifting Repeater, 30dBm 85dB Single Band Digital RF Repeater and so on.

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Supplier Homepage Product Amplifier 95dBm Tetra Digital Frequency Shifting Repeater

95dBm Tetra Digital Frequency Shifting Repeater

FOB Price: Get Latest Price
Min. Order: 1 Piece
Port: Xiamen, China
Production Capacity: 1000/PCS
Payment Terms: L/C, T/T

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Basic Info
  • Model NO.: HEDR04JM-D/HEDR04JM-R
  • Standard: Standard
  • Certification: ISO, RoHS, CE
  • Easy to Install: on Wall or Pole
  • Trademark: Helios
  • Specification: 499mm*442mm*225mm and 499mm*442mm*225mm
  • HS Code: 85437092
  • Type: Wireless Repeater
  • Lightning Protection: With Lightning Protection
  • Condition: New
  • Built-in Wireless Modem: for Remote Monitoring by SMS, GPRS or TCP/IP.
  • Transport Package: Normal Packing
  • Origin: China
Product Description

Helios® Frequency Shifting Repeaters (FSR) system is designed to solve problems of weak mobile signal, which can expand more coverage than RF repeaters and reduce investment for the areas where fiber optic or dedicated cable is not allowed.
The Frequency Shifting Repeaters system (FSR) 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.
   Helios® TETRA Digital Frequency Shifting Repeater is an innovation technology, which is adopting SDR (Software Define Radio) technology basis on FPGA & DSP (Digital Signal Processing) platform. It enables on-the-fly filter be changed/upgraded by software without expensive hardware upgrading. The devices can distribute up to 8 channels from the selected donor base station.

  1. Aluminum-alloy casing with IP65 protection, compact design and cool system without fan.
  2. Best solution to eliminate mutual interference due to sharing the same frequency
  3. Easy to install on wall or pole.
  4. Time slot based Automatic Level Control eliminates near-far effects, The automatic gain control on uplink shall be quicker than 14.167ms
  5. Large outdoor coverage footprint due to high gain and output power.
  6. Details repeater parameters and status can be monitoring by built-in web interface, such as RSSI, temperature, channel numbers, output power level, gain, ATT, return loss, VSWR etc.
  7. Built-in wireless modem for remote monitoring by SMS, GPRS or TCP/IP.
  8. High gain linear power amplifier technique with reliable performance.
  9. Frequency Shifting technology allows very high gain with low antenna isolation.
  10. Innovative Digital filtering technology basis on DSP and SDR to provide excellent signal selectivity and minimum time delay.
Technical parameter:
ItemsTERTA Digital Frequency Shifting Repeater

Donor UnitRemote Unit
Frequency RangeUplink461.600-462.025MHz

Transmission Frequency380-385/390-395MHz
Frequency ErrorMax 0.05ppm
Downlink Input LevelMin -10dBm
Output PowerUplinkMin. 24dBm/carrier for 1 channel
Min.21dBm/carrier for 2 channels
Min. 24dBm/carrier for 1 channel
Min.21dBm/carrier for 2 channels

DownlinkMin. 36dBm/carrier for 1 channel
Min.33dBm/carrier for 2 channels
Min. 36dBm/carrier for 1 channel
Min.33dBm/carrier for 2 channels
Number of channelsUp to 8
GainMin. 95dBMin.95dB
AGC Control RangeMin 40dB (+/-2dB)
Gain Control Range31dB (1dB Step)
VSWR< 1.5
Ripple in BandMax +/- 1.5dB
In-band Inter Modulation AttenuationAccording to ETSI Standard
9KHz-1GHzMax -36dBm

1GHz-12.75GHzMax -30dBm
RF ConnectorN-type Female
I/O Impedance50 ohm
Noise FigureMax 5dB
Group Time DelayMax 12µS (14µS high selectivity)
Temperature Range-25 degree Celsius to +55 degree Celsius
Relative HumidityMax 95%
M.T.B.FMin. 100000 hrs
Power SupplyDC 48V / AC220V (+/-15%), 50Hz
UPS Backup Power Supply (Optional)6 hours / 8 hours
NMS Monitor FunctionReal-time alarm for Door Status, Temperature, Power Supply, VSWR, Output Power, Gain, Uplink ATT, Downlink ATT and etc.
Remote Control Module RS232 or RJ45 + Wireless Modem + Li-ion Chargeable Battery
Approval and TestsEn 301 489-18
ETSI TS 101 789-1, EN 60 950

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