Submitted by:
Kamlesh sumara

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COMPANY PROFILE
A BRIEF INTRODUCTION ON DDK – AHMEDABAD……
 Radio transmission was started in 1923.
 Radio transmission was named AIR in 1936 and renamed with akashvani in 1957.
 In 15th September 1959 live broadcasting of Pandit Javaharlal Nehru’ s speech was telecasted from Newdelhi.
 From 1st April 1976 doordarshan separate its works with radio.
 From 15th august 1982 color transmission started.
 In 1985 low power transmitters are build-up.
A studio hall contains many devices like …
 Lights and Lightning winches .
 Microphone & its Connections ports.
 Cameras.
 Cyclorama.
 Sound absorbers.
STUDIO LIGHTING
“LIGHT is a set of electromagnetic waves which falls in visible range”
 Camera is a device which captures the light rays which are reflected from source object and convert into electric signal.
 Key light 1) Hard Source
 Fill light 2) Soft Source
 Back light
Background light
Selection criteria for MICS:
 Sensitivity
 Signal to noise ratio
 Frequency response
 Directivity pattern
1) Uni-directional
2) Bi-directional
3) Omni- directional
Basic Parts of Video Camera:
1) Electronic Shutter
2) Aperture
3) Lens
4) Trihroic Filter (prism)
5) CCD
6) Electronic circuitry
TELE-PROMPTER
 Special arrangement of Video Camera & monitor for news reading is known as “teleprompter”
 A small camera is hanged (as main camera can’t capture)over the news reader to capture the paper copy on newsreader’s hand.
 The output of this camera is present at the same time in monitor connected at bottom of camera. By using mirror monitor screen is visible to news reader.
 News reader has to read only this contents & newsreader don’t need to remember any information about news.
C.C.U.
 Electronic processing center for all cameras of studio.
 This unit help to control camera at remote distance.
 Unique ccu panel for each camera .
 C.C.U consist of sync pulse generator ,talk back module.
 C.C.U. controls this parameters
1) Iris control
2) Dynamic contrast control
3) Shutter on off control
4)Gamma correction
5)Color bar pattern generator