A PRESENTATION OF MAJOR TRAINING AT

ALL INDIA RADIO

Presented By: Rahul Gawande

(0103EC071080)

INTRODUCTION

For 75 years, AIR has been distinctive part of the Indian way of life . With one of the largest network of SW/MW/FM transmitters, AIR, reaches the remotest corners of the country.

All India Radio (abbreviated as AIR), officially known as Akashvani is the radio broadcaster of India and a division of Prasar Bharati .

Today AIR has a network of 213 broadcasting centers covering 90% of the area & almost reaching the entire population of one billion. All India Radio is one of the largest radio networks in the world. The headquarters is at the Akashwani Bhavan, New Delhi.

The External Services Division of All India Radio broadcasts in 27 languages to countries outside of India.

Stages Of a Radio Station Studio Control Room Transmitter

RECEIVING CENTRE

ANNOUNCER CONSOLE

EQUIPMENTS

Broadcast Studio A broadcast studio is an acoustically

treated room. It is necessary that the place where a programme for broadcast purposes is being produced should be free of extraneous noise. This is possible only if the area of room is insulated from outside sound.

The entry to the studios is generally through sound isolating lobby called sound lock. Outside of every studio entrance, there is a warning lamp, which glows Red when the studio is ON-AIR .

Studio Centre

The Studio Centre comprises of one or more studios, recording and dubbing room, a control room and other ancillary rooms like battery room, a.c. rooms etc. The size of such a centre and the number of studios provided depend on the programme activities of the station. The Studio Centre comprises of one or more studios, recording and dubbing room, a control room and other ancillary rooms like battery room, a.c. rooms, switch gear room ,DG room, R/C room, service room, waiting room, tape library, etc.

PC

TURN TABLE

MICROPHONE

PROGRAM AMPLIFIER

TO CONTROL ROOM

ANNOUNCER CONSOLE

Control Room

Mixing Switching

Transmitter Amplifiers Modulators Antennas

Control Room Broad functions of switching console in control

room:

Switching of different sources for transmission like News, O.Bs. other satellite based relays, live broadcast from recording studio.

Level equalization and level control. Quality monitoring. Signaling to the source location. Communication link between control room and

different studios

RNT SWITCHING CENTRE

STUDIO

SWITCHER

MIXER

PROGRAM AMPLIFIER

Mixing

Various equipments are available in a studio to generate programme as given below:

Microphone, which normally provides a level of 70 dBm.

Turntable which provides an output of 0 dBm. Tape decks which may provide a level of 0 dBm. CD and R-DAT will also provide a level of 0

dBm.

AMPLIFIER

Audio Amplifiers

Power Amplifiers

Peak Clippers

Principle Of Antenna System Antenna is usually a metallic device (a

rod or a wire) used for radiating or receiving electromagnetic waves.

The radio frequency power developed in the final stage of a transmitter is delivered through cables/feeders, without themselves consuming any power to the transmitting antenna.

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