Product Description
GSM1800MHz Tower Mounted Booster (TMB) (20W and 40W for optional)

RF Repeaters, Band Selective Repeaters, Wireless Channelized Repeaters, Optic Fiber Repeaters, Frequency Shift Repeaters, Signal Boosters, Trunk Amplifiers, Tower Mounted Amplifiers, Tower Mounted Boosters.

The GSM1800MHz Duplex Tower Mounted Booster (TMB) is designed to expand Uplink and Downlink signal coverage together. The equipments uses Duplexer with good isolation which deletes unnecessary signal and has small input loss. Compared with TMA which only improve receive path of downlink, the TMB can improve both uplink and downlink through adding power amplifier. It has also bypass mode on the equipment structure, which can prevent the service from interrupting when something happens.

The TMB is composed of Duplexer, Power Amplifier, Low Noise Amplifier, Bypass Mode Switch, PDU Unit and etc.

Function:

TMB is usually used to extend both uplink and downlink signal on suburb, rural, area with much land and few people and open plain terrain where the calling traffic is not clearly risen, but the radius of user active is risen.

1. Extend BTS both Uplink & Downlink coverage as well as link balance
2. Compensate Feeder Loss from Antenna to BTS
3. Decrease System Noise
4. Reduce Drop Call Rate and Improve Call Quality
5. Enhance Traffic
6. Extend Battery Life Time for Handset
7. Condition Electromagnetism Environment

Feature:

1. High gain linear power amplifier technique with reliable performance to effectively improve the downlink coverage of Base Station. (20W and 40W output power for optional)
2. Lower the noise figure and enhance the uplink receiving level of Base Station to effectively improve the BTS coverage area
3. Eliminate the noise and interference brought by long RF cable to the Base Station
4. Reduce transmitting power of mobile to extend battery life and eliminate mutual interference due to sharing the same or adjacent frequency in the uplink
5. Adopt protective enclosure from lightning and raining to work for all weather
6. Automatic bypass system is offered to ensure continued operation of Base Station when TMB has DC power failure
7. Alarms functions and Power Distribution Unit
8. Easy installation and maintenance

Technical Specifications:

Item Name: GSM1800MHz Tower Mounted Booster (TMB) (20W and 40W for optional)
Model Number: TM-TMB-1800-X
Freq Range: Uplink 1710-1785MHz, Downlink 1805-1880MHz
Max Output Power: Uplink Min. 10dBm, Downlink Min. 20W and 40W for optional
Ripple in band: Max +/- 1.5dB
Gain: Uplink Max 12dB (+/-2dB), Downlink 16dB (+/-2dB)
Gain Adjustment Range: 1-7dB
Noise Figure: Max 3dB
Bypass Loss: Downlink Max 2dB
VSWR: Max 1.4
Spurious Emission: Max -36dBm @ 9KHz-1GHz, Max -30dBm @ 1GHz-12.75GHz
Inter Modulation Attenuation: Downlink Min -70dBc
RF Connector: N-type Female
Impedance: 50ohm
Environmental Temperature: -30 - 55 degree C
Relative Humidity: Max 95%
Power Type: DC -48V through PDU and Bias T or AC 220V (+/-15%), 50Hz
Alarm Function: Real-time Alarm for Bypass, Power Supply, Temperature, VSWR, Output Power, ALC, PA etc.
Dimension: 590mm x 435mm x 240mm
Weight: 25Kgs

For more details information about HELIOS's TMA, TMB and Base Station Power Amplifier, please visit our website or contact me directly.