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Transcript

  • 1. Amateur Television
  • 2. Glossary
    • Frame
      • Single Picture
    • Field
      • ½ Picture
    • Interlaced
      • Draws ½ Picture then draws the second half
  • 3. Glossary
    • Interlace
  • 4. Broadcast TV
    • Bandwidth
      • 6MHz
  • 5. Broadcast TV
    • 525 Lines per frame
      • 262 ½ Lines per field
    • 30 Frames per second
      • Full motion video
  • 6. Amateur Television
    • Types of ATV
      • SSTV
        • Slow Scan Television
      • FSTV
        • Fast Scan Television
  • 7. Slow Scan TV
    • Single frame of video
      • Scan convert a frame to audio then transmit the audio
      • Recent happenings
        • Web Cams and Video capture cheap
        • Use sound card to generate tones
        • Rig Blaster, BuxComm interfaces
        • Freeware/Shareware software
  • 8. Fast Scan TV
    • Usable Frequencies
      • 70cm
        • First ham band that is wide enough to allow full 6MHz bandwidth
        • Standard Frequencies
          • 421.25 MHz
          • 426.25 MHz
          • 427.25 MHz
          • 434.00 MHz
          • 439.25 MHz
  • 9. Fast Scan TV
    • Usable Frequencies
      • 33cm 902 – 928 MHz
      • 23cm 1240-1300 MHz
      • 13cm 2390 – 2450 MHz
  • 10. 70cm FS ATV
    • Station Requirements
      • Receive
        • Television Receiver
          • Channel 57 (421.25MHz)
          • Channel 60 (439.25MHz)
        • Down Converter Tuner
  • 11. 70cm FS ATV
    • Station Requirements
      • Transmit
        • Video Source
          • Camcorder
          • Camera
        • Audio Source
          • Microphone
        • Transmitter
          • Off the Shelf
          • Commercial Equipment
          • Home Brew
  • 12. 70cm FS ATV
    • Station Requirements
      • Antenna
        • Horizontal Polarization
    • Operator Requirements
      • Technician Class
  • 13. 70cm FS ATV
    • Off the Shelf Equipment
      • PC Electronics
        • TC70-20S
          • Synthesized 4 Channel Transmitter
            • 20 W Output
          • Built in Tuner/Down Converter
          • Video, Audio, MIC, and PTL Inputs
          • $549
  • 14. 70cm FS ATV
    • Commercial Equipment
      • Cable Modulators
        • Need 25 KHz steps
        • Blonder Tongue (Agile Modulator)
          • Video, Audio Inputs
          • Low Power Output
            • Will require an amplifier
          • Typically available on eBay
            • Running around $50 last year
            • Significantly higher recently
  • 15. 70cm FS ATV
    • Home Brew Equipment
      • PC Electronics
        • Individual pieces
          • Power Amps
          • Modulators
          • Down Converter
      • 4ATV.com
        • 13cm and 23cm equipment
      • MFJ
        • Micro ATV
  • 16. 70cm FS ATV
    • Transmission Distance (Miles)
    133 53 21 16dBd 53 21 8 8dBd 21 8 3.4 Dipole 16dBd 8dBd Dipole Ant. Gain
  • 17. 70cm FS ATV
    • Local Usage
      • Repeaters
        • WA2PJP/R
          • Located on Bald Hill in Selden
          • 434.00MHz Input 421.25MHz Output
          • Talkback 144.34MHz or 144.37 MHz
        • W1NRE/R
          • Located in Southern CT.
          • 426.25MHz Input 439.25MHz Output
          • Talkback 144.34MHz
          • Currently Off the Air
            • Power Problems
  • 18. 70cm FS ATV
    • Local Usage
      • Operators
        • WA2PJP – Joe (Wednesday 8PM)
        • WA2FNQ – Jerry (Wednesday 8PM)
        • W1CTC – Bob (Wednesday 8PM)
        • W2OTA – Mike (Nightly 7PM)
  • 19. ATV Links
    • PC Electronics
      • www.hamtv.com
    • ATV Research
      • www.atvreasearch.com
    • Directive Systems
      • Antennas
      • www.directivesystems.com
      • www.icircuits.com
  • 20. ATV Links
    • Intuitive Circuits
      • Video Overlays, Character Generators
      • www.icircuits.com
    • Connecticut – Long Island ATV
      • www.ctliatv.org
    • Southern CT Amateur Radio Assn
      • www.wa2fnq.hamradios.com/scara.htm