this post was submitted on 30 Mar 2024

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No Stupid Questions

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What produced the old dead channel tv static audiovisuals on tvs? (upload.wikimedia.org)

submitted 2 years ago* (last edited 2 years ago) by ALostInquirer@lemm.ee to c/nostupidquestions@lemmy.world

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Media alt text:
3D render of old tv set with animated static on its screen, as if tuned to a dead channel.

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[–] user224@lemmy.sdf.org 8 points 2 years ago (1 child)

There's always more or less random noise, and that's what you see and hear in analog systems. Random noise. As for why it isn't in color, see: https://dsp.stackexchange.com/questions/46401/why-is-tv-static-noise-always-black-and-white

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[–] QuarterSwede@lemmy.world 1 point 2 years ago*

Ah luminance subcarrier signals . Makes sense.

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