Tetra UHF VHF FM two way radio channel selective signal Repeater booster amplifier
Our tetra repeates have CE 0865 certificate,freely to import to European!
We can also make other band repeater as customer,feel free to contact us for your requirement!
Introduction
RF Repeater is designed to enhance cellular network coverage and fill blind spots. Main operation of the repeater
is to receive low-power signal from Base Station (BS) via radio frequency (RF) transmission by its donor antenna,process, amplify and forward the signal to Mobile Station (MS) in target coverage area by its service antenna.
Features
1.Aluminum alloy enclosure for excellent heat dissipation,waterproof design for all-weather installation;
2.High out band rejection, excellent intermodulation and spurious emissions;
3.Modules structure,Multi-duplexer,two ports design,and built-in power supply,easy for maintenance and installation;
4.Adopting cavity filter with highly selectivity and low insertion loss eliminates interference between uplink and downlink;
5.High linearity PA; high system gain;
6.Allowing for continuous gain adjustment 31dB by 1dB step;
7.Local and remote monitoring with automatic fault alarm.
Typical Application
Specifications
| |
Uplink |
Downlink |
| Working Frequency |
Tetra380 |
380 ~ 385 MHz |
390 ~ 395 MHz |
| Tetra400 |
400 ~ 405 MHz |
410 ~ 415 MHz |
| Tetra420 |
415 ~ 420 MHz |
425 ~ 430 MHz |
| CDMA450 C |
450 ~ 455 MHz |
460 ~ 465 MHz |
| CDMA450 A |
452.5 ~ 457.5 MHz |
462.5 ~ 467.5 MHz |
| Tetra480 |
480 ~ 485 MHz |
490 ~ 495 MHz |
| IDEN |
806 ~ 821 MHz |
851 ~ 866 MHz |
| Others |
as customized |
| Output Power |
27/30/33/37/40dBm |
33/37/40/43/46dBm |
| Gain |
80dB |
80-95dB |
| Channel number |
optional |
max to 8 |
| Channel width |
12.5Khz or 25Khz |
| Downlink to Uplink Separation |
3Mhz min |
| MGC |
≥ 31dB / 1dB step |
| VSWR |
≤1.5:1 |
| In band flatness |
≤3dB |
| Three order intermodulation |
≤-45dBc |
| Gain adjustment accuracy |
0-10dB≤1dB |
| 10-20dB≤1dB |
| 20-30dB≤1.5dB |
| System Delay |
5-12μsec depending on filter bandwidth and required adjacent channel rejection |
| Rejection band |
Fo±0.4MHz |
≤-25dBm |
| Fo±0.6MHz |
≤-35dBm |
| Fo±1MHz |
≤-48dBm |
| Spurious Emission |
9KHz~150KHz≤-36dBm/10KHz |
| 150KHz~30MHz≤-36dBm/100KHz |
| 30MHz~1GHz≤-36dBm/100KHz |
| 1GHz-12.75GHz≤-30dBm/1MKHz |
| Noise Figure |
≤5dB |
| I/O Impedance |
50Ω |
| RF Connector |
N-Type (Female) |
| Radio Equipment Directive |
2014/53/EU |
| Electromagnetic compatibility |
To the ETSI EN 301 489-1 V2.2.0, ETSI EN 301 489-3 V2.1.1 standard |
| Power |
AC110V or AC220V |
| Temperature Range |
-25ºC~+65ºC |
| Humidity |
≤95% |
| Size |
less than 660x410x200mm |
| Weight |
30-35kg |
Working principle:
When the repeat antenna receives uplink signals from a subscriber, the signals will undergo processing of low-noise amplifier, filter and power amplifier first, and then be transmitted to the base station, thus accomplishing connection between subscribers in signal blind area and base station.
In this way, the blind areas are eliminated.
Considering receiving signal intensity and coverage size may vary with sites where repeater is located, it is necessary to control the gain and output of the repeater.
Additionally, considering the fading effect in spatial signal transmission, auto amplitude fixing for output is required.
For this purpose, MGC and ALC circuits are included in the uplink/downlink channels.
Monitor Function
Adjust the gain of the uplink and downlink.
Set maximum output power of the uplink and downlink.
Detect operating temperature of the equipment.
Detect output power of uplink amplifier and downlink amplifier.
Detect input power of uplink and downlink.
Check the uplink LNA and downlink LNA for working properly
Check the uplink and downlink "frequency selective filter" for working properly.
Check the uplink PA and downlink PA for working properly.
Switch on and switch off the power amplifiers of uplink and downlink.
Set the frequency of uplink signal channel and downlink signal channel.
Detect the VSWR of downlink output antenna port.
Site Survey
Before you install, the installer should contact the person responsible for the project, understand whether there are installed conditions in the installation site.
Specifically include: Installation site, surroundings (Temperature and Humidity), power supply, and so on. If qualified, should go live on-site survey with related personnel. The repeater is designed that can working outdoors, operating temperature is -25ºC~65ºC, humidity is ≤95%, which can be adapted to most areas of the natural environment.
Recommended Environmental Requirements:
1.Installation area non-corrosive gases and fumes, Electromagnetic interference field strength ≤140dBμV/m(0.01MHz~110000MHz).
2.Mounting height should facilitate the RF cable routing, cooling, safety and maintenance.
3.Should provide a set of independent and stable 150VAC~290VAC(Nominal 220V/50Hz)AC Power. It must not be shared with other high-power appliances telecommunications equipment.
4.Lightning protection devices must be installed in the building, and it should have sufficient strength and stability.
5.There are grounding bar in the vicinity.
Installation Tools
Installation tool to use: Electric impact drill, iron hammer, pulleys, ropes, belts, helmets, ladders, screwdriver, hacksaw, knife, pliers, wrenches, compass, measuring tape, tweezers, electric iron, portable PC, 30dB directional coupler, spectrum analyzers, VSWR tester.
Repeater installation
It can be holding pole or wall mounting way. It should be installed in ventilated place, vertically on a wall or mast to ensure good heat dissipation, if hang on the wall, the upper part of the equipment to be considered more than 50cm from the ceiling, the lower part of the equipment needs more than 100cm from the floor.
Holding Pole Mounting
Wall-Way Mounting
Antenna and Feeder Installation and Precautions
1.Installation of antenna systems requires experienced professionals to complete.
2.You can not install an antenna near power lines, which may be life-threatening.
3.All exposed joints must use self-adhesive waterproof tape and electrical insulation tape seal securely.
Connect the Ground and Power Supply
1. Equipment Grounding
The equipment must be well grounded, there is a copper on the repeater wall chassis ground, use 4mm2 or thicker copper wire close to the ground. Grounding wire should be as short as possible. When installed, the equipment grounding wire should be connect to the integrated grounding bar. Grounding resistance of requirements bar may be≤ 5Ω, ground connector require preservative treatment.
2. Connect the Power
Connect 220V/50Hz AC power to the equipment power port terminal blocks, power line use 2mm2 cables, length less than 30m. For standby power requirement, the power must go through UPS, and then connect the UPS to the repeater power port terminal blocks.
For more details,feel free to contact us!
Audited Supplier 
){kind=link}