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Հարց 88

What technique allows commercial analog TV receivers to be used for fast-scan TV operations on the 70-centimeter band?

  1. Transmitting on channels shared with cable TVՃիշտ պատասխան
  2. Using converted satellite TV dishes
  3. Transmitting on the abandoned TV channel 2
  4. Using USB and demodulating the signal with a computer sound card

Բացատրություն

The 70 centimeter band lies inside the frequency range that North American cable systems assign to their upper VHF-range channels, so a cable-ready analog television set switched to cable input and fed from an outdoor antenna tunes common ATV carriers directly. Channel 2 is far below this range, satellite dishes and sound card decoding solve different problems.

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Հարց 88: What technique allows commercial analog TV receivers to be… · FCC Amateur Extra Class (Element 4) · Questena