[DaiPlusPlus]

> Later VCRs have that feature...

…huh, turns out some US-market VCRs would automatically tune to PBS specifically for a special time-signal embedded within the TV signal, and apparently not all PBS stations participated so it would never work for some people.

I’m guessing it was something encoded into the VBI like Closed Captions and Teletext, etc? I couldn’t find the name for such a time system let alone a spec. Can you tell me where to look?

[netsharc]

Asking one of the planet-killing oracles got me this:

https://www.researchgate.net/figure/The-XDS-Line-21-Time-Cod...