Question
What technique allows commercial analog TV receivers to be used for fast-scan TV operations on the 70-centimeter band?
Answer Options
- A) Transmitting on channels shared with cable TV
- B) Using converted satellite TV dishes
- C) Transmitting on the abandoned TV channel 2
- D) Using USB and demodulating the signal with a computer sound card
Correct Answer: A
Explanation
Amateur Fast-Scan TV (ATV) signals are often transmitted in a format compatible with consumer television equipment to make reception accessible. The 70-centimeter band (420–450 MHz) is a common range for ATV, which corresponds to channels that were once used in cable television systems.
The technique that allows commercial analog TV receivers (or tuners) to be used for ATV operation on the 70-centimeter band is transmitting on channels shared with cable TV. The 70 cm band overlaps with the frequency range of cable TV channels 57 through 62. By using the same modulation format (typically VSB) and channel spacing, commercial cable TV tuners can be employed after minor modifications or selection of the correct channel number.
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