On Chroma Dots and how to determine if they are present

[VintagePC]

Originally Posted by Eric H

I thought Chroma Dots were something that the PAL system had but not NTSC?

I don't remember the details but I read that there were some B&W video tapes of what were originally color Dr Who episodes using the dot pattern to determine the correct colors.

http://www.techmind.org/colrec/

NTSC definitely has it, it's visible on sets where you have more than 3.5MHz bandwidth, since the colour subcarrier is at that frequency. If I had a bandwidth (multiburst) generator I could answer my own question easily as to whether it is possible to see them on my set - alas, I don't, so I'm curious if there's a cheap way to determine this when there is the possibility of other noise sources (e.g. dot crawl)


Bob Andersen talks about it when running some of his sets after alignment and restoration as well.