AmateurAmateur TelevisionTelevision GlossaryGlossary u Frame • Single Picture u Field • ½ Picture u Interlaced • Draws ½ Picture then draws the second half GlossaryGlossary u Interlace BroadcastBroadcast TVTV u Bandwidth • 6MHz BroadcastBroadcast TVTV u 525 Lines per frame • 262 ½ Lines per field u 30 Frames per second • Full motion video AmateurAmateur TelevisionTelevision u Types of ATV • SSTV u Slow Scan Television • FSTV u Fast Scan Television SlowSlow ScanScan TVTV u Single frame of video • Scan convert a frame to audio then transmit the audio • Recent happenings u Web Cams and Video capture cheap u Use sound card to generate tones u Rig Blaster, BuxComm interfaces u Freeware/Shareware software FastFast ScanScan TVTV u Usable Frequencies • 70cm u First ham band that is wide enough to allow full 6MHz bandwidth u Standard Frequencies • 421.25 MHz • 426.25 MHz • 427.25 MHz • 434.00 MHz • 439.25 MHz FastFast ScanScan TVTV u Usable Frequencies • 33cm 902 – 928 MHz • 23cm 1240-1300 MHz • 13cm 2390 – 2450 MHz 70cm70cm FSFS ATVATV u Station Requirements • Receive u Television Receiver • Channel 57 (421.25MHz) • Channel 60 (439.25MHz) u Down Converter Tuner 70cm70cm FSFS ATVATV u Station Requirements • Transmit u Video Source • Camcorder • Camera u Audio Source • Microphone u Transmitter • Off the Shelf • Commercial Equipment • Home Brew 70cm70cm FSFS ATVATV u Station Requirements • Antenna u Horizontal Polarization u Operator Requirements • Technician Class 70cm70cm FSFS ATVATV u Off the Shelf Equipment • PC Electronics u TC70-20S • Synthesized 4 Channel Transmitter u 20 W Output • Built in Tuner/Down Converter • Video, Audio, MIC, and PTL Inputs • $549 70cm70cm FSFS ATVATV u Commercial Equipment • Cable Modulators u Need 25 KHz steps u Blonder Tongue (Agile Modulator) • Video, Audio Inputs • Low Power Output u Will require an amplifier • Typically available on eBay u Running around $50 last year u Significantly higher recently 70cm70cm FSFS ATVATV u Home Brew Equipment • PC Electronics u Individual pieces • Power Amps • Modulators • Down Converter • 4ATV.com u 13cm and 23cm equipment • MFJ u Micro ATV 70cm70cm FSFS ATVATV u Transmission Distance (Miles) Ant. Dipole 8dBd 16dBd Gain Dipole 3.4 8 21 8dBd 8 21 53 16dBd 21 53 133 70cm70cm FSFS ATVATV u Local Usage • Repeaters u WA2PJP/R • Located on Bald Hill in Selden • 434.00MHz Input 421.25MHz Output • Talkback 144.34MHz or 144.37 MHz u W1NRE/R • Located in Southern CT. • 426.25MHz Input 439.25MHz Output • Talkback 144.34MHz • Currently Off the Air u Power Problems 70cm70cm FSFS ATVATV u Local Usage • Operators u WA2PJP – Joe (Wednesday 8PM) u WA2FNQ – Jerry (Wednesday 8PM) u W1CTC – Bob (Wednesday 8PM) u W2OTA – Mike (Nightly 7PM) ATVATV LinksLinks u PC Electronics • www.hamtv.com u ATV Research • www.atvreasearch.com u Directive Systems • Antennas • www.directivesystems.com • www.icircuits.com ATVATV LinksLinks u Intuitive Circuits • Video Overlays, Character Generators • www.icircuits.com u Connecticut – Long Island ATV • www.ctliatv.org u Southern CT Amateur Radio Assn • www.wa2fnq.hamradios.com/scara.htm.