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BTS

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BTS cabinet consists of differentmodules, each of which performs a

specific tasks. All the modules are fitted on to their

respective slots on the backplane.

BTS cabinet is of two types: 1. Indoor Cabinet (needs shelter)

2. Outdoor Cabinet (no need of shelter)

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MODULES OF BTS LNAS (Low Noise Amplifiers) PAS (Power Amplifiers)

SPLITTERS TRX Units COMBINERS  ALARM PANEL

COOLING UNITS POWER UNITS BACK PLANE

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BTS consists of O&M module which monitorsthe performance of TRx units.

It consists of ports (RJ-45, RS-232) to do thecommunication.

Ladders are used in BTS to support cablesfrom tower on to the BTS cabinet.

Towers are of two types as RTT and GBT.

 Aviation lamp is present at the top of tower.

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BTS Shelter BTS  AC

BATTERY BANK  SMPS GROUND BAR  MCB (Main Circuit Braker)

DCDB(DC DISTRIBUTION BLOCK) LADDERS HATCH PLATES

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BTS Premises BTS premises consists of 

1. Tower

2. BTS shelter

3. Generator

4. Security room5. External Ladders

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BTS components takes the incoming supplyfrom mains as the primary source of power.

 As alternate power, it relies on Generator setand Battery Banks.

Each module consists of LED’s on the frontwhich indicates their status

Green - Operational

Orange/Yellow- standby/getting ready

Red - faulty

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Post Physical Installation POWER MEASUREMENT

 VSWR MEASUREMENT

COMISSIONING

 ALARMS (External & Internal)

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Microwave unit basically consists of 3components 1. IDU (Indoor Unit) 2. ODU (Outdoor unit)

3. Wave guide

Indoor unit tells how much radio togenerate, outdoor unit generates thespecified amount and wave guide transmitsthe generated radio waves.

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Microwaves in a descriptive term used to identifyelectromagnetic waves in the frequency spectrumranging approx from 1 GHz to 30GHz.

These frequencies contain two energies (Electric andMagnetic) so also known as ELECTROMAGNATICWAVES.

Propagations of this waves happens in such a waythat direction of propagation, Electric field and

Magnetic field always remains perpendicular to eachother. Microwaves frequencies characteristics are very

much similar to light.

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Depending on the topography and themeteorological conditions, radio waves

propagate In different ways causingattenuation to the original wave.

The microwave link between one BTS to

other BTS is called “hop”. 

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Cascading

Filler modules

Tasks to be performed by O&M Engineer are

1. Preventive maintenance

2. Transport Maintenance

3. Battery Backup 4. Emergency visits

5. Expansion/upgradation