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APRACTICAL TRAINING PRESENTATION

ON

ALL INDIA RADIO(JODHPUR)

Submitted to :Ms. Laxmi Choudhary

(Training seminar coordinator)

Presented By :Parikshit Kuldiya

Electronics & Communication

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CONTENTS

Introduction

History and present scenario

Principal of All India Radio

Methodology of Radio

Three-tier broadcasting system

Transmitter

Studio

Console

Phone in Program console

Conclusion

INTRODUCTION TO A.I.R

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A.I.R is one of the largest radio networks in

the world.

A national service planned, developed and

operated by the Prasar Bharati Broadcasting

Corporation of India

All India Radio, Jodhpur was established at

15th August,1965.

The Satellite Earth station was established at

21st March,1944.

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HISTORY AND PRESENT SCENERIO

The first radio program in India was broadcast by the Radio Club

of Mumbai in June 1923 .

In 1926 the private Indian Broadcasting Company (IBC) was

granted permission to operate two radio stations; the Bombay

station was inaugurated on July 23, 1927, the Calcutta station

followed on August 26, 1927.

The introduction of the commercial channel ‘Vividh Bharti’ in

October 1957 increased the interest and popularity of radio.

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2,75,000 receiving sets at the time of Independence, now there

are about 132 million estimated radio sets in the country.

AIR today has a network of 237 broadcasting centers with 149

medium frequency (MW), 54 high frequency (SW) and 177 FM

transmitters.

The coverage is 91.85% of the area , serving 99.18% of the

people in the largest democracy of the world.

AIR covers 24 Languages and 146 dialects in home services.

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Principles Of All India Radio

*Transmitting

*A radio wave carries information signal;

Signals are converted into electrical

signals. A carrier wave is then produced

from the modulation. The wave is then

amplified, and sent to the antenna that

then converts signal into an E.M. wave.

*Receiving

*An antenna on receiving the signal send it

to the receiver this then converts the

electrical signal sends it to the amplifier

either a speaker/headphones jack this is

then converted into a sound wave.

• Modulation• Amplification

Transmission

• Demodulation• Amplification

Reception

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Methodology of Radio How radio electromagnetic waves are changed to Radio Waves -

Modulatingsignal

CarrierWave

ModulatedWave

Microphone

Broadcast Tower

Radio

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THREE-TIER BROADCASTING SYSTEM

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TRANSMITTER

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In normal mode 2x3 KW outputs are combined at 3dB

hybrid combiner and combined output power is

connected to the antenna.

Transmitter A connected to antenna, transmitter B

connected to dummy load in case of failure of transmitter

B.

2*3 KW output are connected in 3db hybrid combiner

and combined output power is connected to dummy load

for testing the transmitter as whole.

Forward power or reflected power in the combined out

coaxial line

RF Power into reject load.

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There are following studio in AIR JODHPUR: --_

1. DRAMA STUDIO: Recording of Drama, discussion, chat, phone in Program.

2 TALK STUDIO: For live program like talk and rural programs.

3. MUSIC STUDIO: Recording of musical programs and concerts.

4. CBS: Purely dedicated to commercial broadcasting service of Vividh Bharti

5. PLAYBACK STUDIO: For announcing and playback of songs and records.

6. DUBBTNG STUDIO: dubbing and editing of tapes.

STUDIO

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CONSOLE

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PHONE IN PROGRAM CONSOLE

THIS CONSOLE IS GEENRALLY USED FOR THE

PRODUCTION OF LISTENER INTERACTTVE RADTO/TV

PROG RAM.

This is used to interface telephone line with the broadcast

mixing console which is turn interfaces with the experts sitting

in the studio.

This unit has provision for receiving 3 telephone line at a

time. This system gives a new dimension and proves to be

valuable medium to disseminate listener's information oriented

live interactive program.

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SYSTEM FECILITIES

A. Interface with telephone line

B. Interface with telephone equipment

C. Optional facility for headset if required

D. Optional facility for direct broadcast on air using

headset/handset lf required.

FEATURES

1. Conversion with the remote participant in the live program.

2. Feed responses from the expert in the studio to the listeners

through telephone line.

3. Facilitate live broadcast of both the listen enquiry and expert's

responses.

4. Provide music on hold

5. Provide signaling facilities for indicating incoming calls.

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CONCLUSION

It was a wonderful experience , training in A.I.R.

There is great scope for engineers in the field of

communication.

Exposure to practical working conditions will be beneficial

for our career.

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QUERIES ???(if any..)

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Thank u…