Anand 30 October 2020

Part B: Vocational Skills

  • Unit 1: Basic Occupational Safety and Precautions
  • Unit 2: Microphones and Loudspeakers
  • Unit 3: Recorders
  • Unit 4: TV System
  • Unit 5: Modern Appliances

1. Basic Occupational Safety and Precautions

2. Microphones and Loudspeakers

  1. Construction, working principle and frequency response of Carbon Microphone, Variable┬аReactance Microphone, Capacitance Microphone, Piezo-Electric Microphone, Moving Coil Microphone.

  2. Frequency ranges of musical instruments, Intensity and Dynamic Range, Constructions and working principles of Moving Coil Loudspeaker, Impedance and Power Level of┬аloudspeaker, Frequency characteristics of Practical Loudspeakers: Woofer, Tweeter,┬аSquawker, and Loudspeaker Enclosure.

3. Recorders

  1. Analog and digital sound recording, Disk recording and reproduction, working principle┬аwith block diagram of disk recording and reproduction.

  2. Principle of magnetic recording and playback, Requirement of bias,Working principle with block diagram of a tape recorder system.

  3. Principle of optical recording, CD/ DVD manufacturing and recording, CD/ DVD player system, Advantages/ Disadvantages.

  4. Steps for Fault finding & Analysis.

4. TV System

  1. Working principle with block diagram of TV transmitter and receiver, Brief description┬аwith circuit diagram: TV Tuner, Video IF stage, Sound stage, Picture tube & its associated circuit, Synchronizing circuits, Horizontal & vertical deflection circuits, Remote control of a TV receiver, Idea of bandwidth, blanking and synchronization pulses, modulation┬аscheme, monochrome system, extension of colour transmission.

  2. Channel and cable type TV system, Head end processor, Trunk & cable distribution system with block diagram, Scrambling.

  3. Introduction to LCD and LED TV systems, Introduction to high definition systems.

  4. Steps for Fault finding & Analysis.

5. Modern Appliances

  1. Working principle and block diagram of following:┬аMicrowave oven, Telephone, Fax machine, Printers, Scanners.

  2. Steps for Fault finding & Analysis.

Syllabus for Class

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