tb-1900 gsm ds 0-0-3

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GSM1900M Tower Mounted BoosterTB-1900(40W)

Information contained in this document is subject to confirmation at time of ordering.http://www.comba-telecom.com

Issued: 22Nov10Control: 0-0-1

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Features

High downlink power 46dBm for extended cell coverage.

MCPA with 20MHz Instantaneous Bandwidth can support multiple GSM Downlink carriers.

Low noise amplifier reduces uplink system noise figure and helps to reduce call drop and improve voice quality.

Reduces handset output power to improve uplink C/I.

Permits local or remote monitoring via PC or wireless modem.

Alarms can be transmitted to OMC via data link or SMS.

External alarm to BTS by voltage-free relay contacts.

Automatic RF by-pass feature permits BTS operation when equipment or power supply fails.

Internal Li-ion backup battery ensures alarm messages are transmitted when equipment or power supply fails.

Designed for all outdoor application waterproof, damp-proof and omni-sealed (IP65).

Product Description

The TB-1900 is a GSM tower mounted booster (TMB) that provides both uplink and downlink amplification. The TMB unitis installed near the antenna at the tower top to boost the transmitted power for extended cell coverage. The uplink

low-noise amplifier (LNA) serves to improve the sensitivity of the BTS to cope with the extended cell coverage in the

downlink.

The TB-1900 is powered through a separate power cable, with various power supply options. The system consists of

duplexers, uplink LNA, downlink MCPA, RF by-pass switch, main control unit (MCU), distribution board, power supply unit,surge protector, wireless modem, and Li-ion backup battery. Parameter settings of the unit can be done locally via a PC

with OMT, or remotely via wireless modem using OMT or OMC software. Alarms are displayed on the OMT screen and could

be detected by BTS as external alarm. Through the wireless modem, the alarm data can be transmitted to the OMC

automatically, or be sent as SMS to a predefined cellular device.

Functional Block Diagram

Ant1

ServiceAntenna

1Tx1Rx1

BTS1

Downlink/UplinkBy-pass

LNA1

MCPA

UplinkBy-pass

Rx1Diversity

B

T

S

BTS2Ant2

ServiceAntenna

2

LNA2

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Technical Specifications

ElectricalFrequency Range, Uplink MHz 1850 1910

Frequency Range, Downlink MHz 1930 1990Instantaneous Bandwidth MHz 20

Intermodulation, Downlink dBc -60

Total Output Power dBm 46

Output Power Fluctuation dB 1

Maximum Uplink Gain dB 12 1

Maximum Downlink Gain dB 20 1

Gain Adjustment Range (1dB Step), Uplink dB 0 - 12

Gain Adjustment Range (1dB Step), Downlink dB 0 20

9kHz to 1GHz dBm -36 / 100KHzSpurious

1GHz to 12.75GHz dBm -30 / 1MHz

Noise Figure, Uplink dB 3.0

Absolute Maximum RF Output Power Uplink dBm +10

Absolute Maximum RF Input Power Downlink dBm +43

Insertion Loss, By-pass Mode dB 2.0

Pass Band Ripple, p-p dB 2.0

System Group Delay nsec 500

Input VSWR 1.5

Impedance 50

Power, Mechanical & EnvironmentalDimensions, H x W x D mm TBD

Weight (approx.) kg 37

VAC 90 264 / 47 63HzPower Supply

VDC -48

AC Power Consumption (approx.) W 600

Power Up Waiting Time (approx.) sec 60

MCU Battery Backup Time (approx.) hr 3

Enclosure Cooling Fan

RF Connectors N-F or 7/16 Din-FOperating Temperature C -40 to +55

Operating Humidity % 95

Environmental Class IP65

MTBF hr > 50,000

Note: Typical specifications at room temperature.*1: f deviation from the center of GSM allocated carrier.

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Operation and Maintenance

Using a direct serial connection to a PC, installation and commissioning of the TB-1900 is accomplished by the OMT at the

bottom PCU. Using the integrated wireless modem (data or SMS mode), equipment parameters can be monitored and

controlled remotely.

Controlled equipment parameters include: Channel No, UL/DL ATT, Soft ON/OFF, Over-Temp Threshold, DL Output Power

Threshold, DL Input Power Threshold and Alarm Report Enable.

Monitored equipment alarms and parameters include: Alarms (LNA, DL PA, Power Down, PSU Fault, Door Open, DL Input

Power Low, DL Output Power Low, Over Temp), UL/DL Gain, DL Input /Output Power.

The TB-1900 has been developed to take advantage of advanced network operation, where the OMC (optional) provides an

effective solution for central monitoring of a group of Comba products.

tb-1900 gsm ds 0-0-3

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