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The article explains how selective fading, caused by signal reflections, makes TV reception highly sensitive to nearby movement. It notes that the visual gap between stripes is approximately 70 pixels with a 150 Hz update rate.
Summarised automatically by AI from the original article by Hacker News. AI can make mistakes, so check the original for details.
This is selective fading: The direct signal is being canceled out by a strong reflection. Because the phase of the reflection depends on frequency, this effect is not uniform over the whole signal. Apart from being annoying if you're trying to watch TV, this state is extremely sensitive to any nearby movement.
The gap between each stripe is around 70 pixels, and the waterfall has an update rate of 150 Hz...
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