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Amateur Television

Amateur Television. Glossary . Frame Single Picture Field ½ Picture Interlaced Draws ½ Picture then draws the second half. Glossary. Interlace. Broadcast TV. Bandwidth 6MHz. Broadcast TV. 525 Lines per frame 262 ½ Lines per field 30 Frames per second Full motion video.

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Amateur Television

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  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)

  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

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