CAMERA CHAIN AND CAMERA CONTROL UNIT OF TV

CAMERA CHAIN

Tube power supply section provides all the voltages required grids of electron gun. Horizontal and vertical deflection supplies the saw tooth current to the deflection coil of scanning the positive image formed on the target. The built in synchronous pulse generator provides all the pulses required for the encoder and color generator of the camera. The signal system in most of the camera consists of processing of the signal from red, blue, green tube. Some of the camera uses white, blue, red instead of R.G.B system, the processing of red and blue channel is exactly similar. Green channel, which also called a reference channel, has slightly different electronics concerning aperture correction.

CAMERA CONTROL UNIT

The TV camera which includes camera head with its optical focusing lens, pan and tilt head, video. Single pre amplifier view finder and other associated electronic circuiting and mounted on cameras trolley and operate inside the studio. The output of camera of cameras in preamplifier in the head and then connected to the camera control unit through long multi-core cable. CCU can control three color,

RGB=0.10 + 0.59 + 0.11 = 100%

In CCU monitoring sources, monitoring facilities and pulse distribution amplifiers are available. Vectorscope provides an overview of control and connection function. Monitor can detect any fault in the camera.

The color camera chain comprises the following basic assembly,

  • Color Camera
  • Camera Control Unit
  • Connection Unit
  • Multi-wire cable
  • Camera view finder

DIMMER ROOM

It consists of light control system which gives the various lighting effects in the studio.

General description of Light Control System

The light control system designed for television studio comprises of,

■ Electronic dimmer rack

■ Power distribution and control panel

■ Studio light

■ Tail back system

■ Alight control desk

Author Bio: The Author of this article, Sreejith is writing articles onTV Camera Tubes and Electronics and Communications