pk all india radio ppt
TRANSCRIPT
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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
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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…