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Page 1: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

For BSNL Internal Circulation only

E2-E3

Consumer Mobility

Maintenance Issues of BTS

Page 2: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

For BSNL Internal Circulation only

WELCOME

• This is a presentation for the E2-E3 Consumer

Mobility Module for the Topic: Maintenance

Issues of BTS

• Eligibility: Those who have got the Upgradation

from E2 to E3.

• This presentation is last updated on 15-3-2011.

• You can also visit the Digital library of BSNL to

see this topic.

Page 3: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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AGENDA

To know the methods BTS maintenance

Important process under each method

Page 4: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

For BSNL Internal Circulation only

BTS MAINTENANCE

To ensure the health of BTS in various generic

aspects deserving quick attention

Electricity power,

Engine Alternator,

Transmission link availability

Antenna alignment.

Equipment Hardware maintenance

Page 5: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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Preventive maintenance ( Once in Six Months)

Corrective maintenance.

Page 6: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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Preventive Maintenance

Aviation lamp -

Performance of sensor and lamp is to be

checked

Action:- Mask the sensor from sunlight and

check for glow of lamp. Glowing shows the good

condition. Remove the mask and thus expose

the sensor to sunlight. Glowing of lamp should

cease. Test results may be recorded in the

logbook. If the performance is not satisfactory,

replace the lamp/sensor which is faulty.

Page 7: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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Earth - Lightning spike earth, Tower earths DG

& Equipment earth to be checked. With Megger

take the value. Value should be less than 1 ohm

for each earth.

Page 8: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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Antennae & Tower: To be verified as andwhen any faults/defects (like high VSWR)reported or once in a year which ever is earlier.

Visual check of bolts/nuts and sample check oftheir tightness,

Greasing on foundation bolts to be done.

Check the Antenna connectors and theirtightness.

Check for tightness of antenna fixtures, u clampsetc..

Page 9: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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Check for ingress of water (condition of weatherproofing in waveguide) etc

Check the orientation of antenna of each sectorand compare with the old records.

Check for the down tilt of antennae which alsomay be compared with old records .

Page 10: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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Power Supply

1. AC Power Supply

2. DC power Supply

Page 11: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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Check of Battery

Measure for Out put

(53.5+0.5V)

Measure for individual

cell output After 1 hr

discharge.

Tools required – screw driver / spanner sets

Testing Instrument required – Digital Multi

meter

Battery

Page 12: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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BTS Checking Procedure

Filter Fans Performance of eqpt

Check of clogging

due to

accumulation of

due to dust etc..

Cleaning of filter is

to be done.

Check

to

proper

working

of fan

units.

Check for VSWR &

Power for each DRX

in each sector

(VSWR for 900 MHZ

& 1800 MHZ cables

must be less than 1.3

Tools required – Spanner set, screw driver bit set

Testing instruments required – Power meter, Site

Master / BTS Tester

Page 13: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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2. Corrective Maintenance

Whenever any fault is reported from or duringperiodic visits/inspections, the correctivemaintenance is done for the BTS site inaccordance with alarm. After any majormodification in the BTS site like change inantenna settings, site configuration, power etc.,drive test and optimization of the site is done inaccordance with the Operating Procedure.

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Problems in the Network

Low network availability

Low network stability

Page 15: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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CAUSES OF BTS FAILURE

Coverage problem

Hand over problem

Page 16: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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REASON FOR BTS FAILURE

Power Failure and Low battery back up.

Non functioning of DG at the time of Powerfailure.

Transmission media failure.

Delay in restoration

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RF Issues

Overloaded BTS

Interference problem

Load balancing with adjacent BTS bytilting/lowering down/raising up BTS antennasshould be carried out whenever required

Fault/damage in Feeder cable (causes VSWRfault) , IF cable (mini link) requires change ofthese .

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Procedure for handing equipment

faults.1. It the fault is of IDU/ODU, replaces the faultyunit with spare, subject to spare availability.

2. The fault unit is handed over the AMC holderfor repair.

3. It spare is not available, the fault isregistered at OMC-R (web site)

4. OMC-R, in turn, intimates the concernedvendor / AMC holder for rectification.

5. Monitors the corrective action taken by thevendor / AMC holder and acts accordingly.

Page 19: PowerPoint Presentationtraining.bsnl.co.in/DIGITAL_LIBRARY_SOURCE/upgradation/E2-E3/E2-… · For BSNL Internal Circulation only WELCOME •This is a presentation for the E2-E3 Consumer

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