Firoz all india radio ppt
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This document provides information about radio broadcasting in India. It discusses: - The history of radio broadcasting in India, beginning with the first broadcast license in 1922 and the establishment of the All India Radio network in 1936. - The technical aspects of radio transmission, including how radio waves carry signals and how receivers convert those signals back into audio. - The components and functions of a radio broadcasting studio, including mixing boards, recording rooms, and transmission equipment. - Details about AIR's network today, which includes 149 MW transmitters, 54 SW transmitters, and 171 FM transmitters covering over 91% of India.
Firoz all india radio ppt
- 1. ON Poata C-Road, Jodhpur (Rajasthan) Presented to : Ms. Laxmi Chaudhary Presented By : Firoz Tak 7th sem, ECE
- 2. • Radio is the transmission of signals by modulation of electromagnetic waves with frequencies below those of visible light. • Radio is based on wireless communication or setellite communication. • In this era of technology due to need of wireless communication, A national service was planned and developed by the Prasar Bharati Broadcasting Corporation of India.
- 3.  The first license granted for transmitting a broadcast was given on February 23, 1922. The Radio Club of Calcutta was the first radio club to start functioning in Nov-1924  The Government run broadcasting set up was called the India State Broadcasting Service (ISBS) which is then turned into AIR (All India Radio) in June 1936.  The introduction of the commercial channel ‘Vividh Bharti’ in October 1957 increased the interest and popularity of radio.  AIR today has a network of 232 broadcasting centres with 149 medium frequency(MW), 54 high frequency (SW) and 171 FM transmitters.The coverage is 91.79% of the area serving 99.14% of the people.C
- 4. 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.
- 5. • Studio Centre • Broadcast Studio • Mixing • Control Room
- 6.  Recording Room  Dubbing Room  Loud Speakers  Headphones
- 10. Studio transmitter link equipment in 1.5 GHz frequency band can be used for transmission of signal music channel (STL-O1). STL link consist of two terminal i.e. one receiver and one transmit the music program from AIR. Receiver terminal consist of only receiver modules required to receive the studio program and then this music is given to AIR transmitter. Both transmitter and receiver terminals are with standby modules the switch over operation to standing module is automatic without any time Delay
- 14. • AC POWER SUPPLY • DC POWER SUPPLY
- 15.  FM broadcasts were introduced in Madras in 1977 and later at Jalandhar in 1992, but it was only in 1993 when slots came to be leased to private companies.  On August 15, 1993 a Frequency Modulation (FM) Channel was launched in Bombay, with nine hours of radio which sloats was leased to private producers like Times FM, radiostar and Radio Midday.  In FM Phase II some 338 frequencies were offered of which about 237 were sold.
- 16. Here is an example of both FM modulation and AM modulation you can see from the image that AM is much looser than the FM signal meaning that less data can be sent at one time as it isn’t compressed. The reason for the difference in sound quality as a lower bitrate must be sent across the wave.
- 17. 91.1 - Radio City 92.7 - Big FM 93.5 - S FM 94.3 - Radio One 98.3 - Radio Mirchi 101.3 - FM Rainbow 102.9 - Vivdh Bharati 104 - Fever FM 105.6 - Gyaan Vaani
- 18. o This is only means which can provide multi access two way communication. o The cost of transmitting information through satellite is independent of distance involved. o Satellite can be used for two way communication or broadcast purpose with the covered area. o Satellites are capable of handling very high bandwidth. o It is possible to provide large coverage using satellite. For example Geostationary satellite can cover about 42% of earth surface using global beam.