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Home Television Station

Home Television Station . By Hung Nguyen Khoi Nguyen. ECE345 Representation Group 9 TA: Purvesh Thakker. Why build a TV transmitter. Want to have RF design experience Home security Entertainment. Television Transmitter. Top View of Transmitter. Block Diagram of Transmitter.

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Home Television Station

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  1. Home Television Station By Hung Nguyen Khoi Nguyen ECE345 Representation Group 9 TA: Purvesh Thakker

  2. Why build a TV transmitter • Want to have RF design experience • Home security • Entertainment

  3. TelevisionTransmitter

  4. Top View of Transmitter

  5. Block Diagram of Transmitter

  6. Side View of Transmitter Video Input RF Oscillator RF Amplifier To Antenna Video gain Modulator Audio Input Subcarrier Oscillator & FM Modulator

  7. Colpitts Oscillator Frequency controlled by C1,C2, and L1

  8. Hartley Oscillator Frequency controlled by C2 and IF transformer

  9. Spectrum of transmitter without input signals Carrier Frequency Second harmonic Third harmonic Forth harmonic

  10. Spectrum of modulated signals Where are the chrominance subcarrier, the horizontal spectrum and the vertical spectrum??? Sound carrier Picture Carrier Carrier Frequency

  11. Problems Encountered • Searching for parts • Noise in Audio background & Video distortion • Time consume • Many more factors need to be considered in our design

  12. Conclusions What we learned: • Time Management • Teamwork • Research plays a big role in design process

  13. Final Costs • Parts: $40 • Labors: $7,000 • Total: $7,040

  14. Suggestion?

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