NTSC test pattern generator on VCD?

[John Foust]

At 11:16 PM 1/28/2005, chris wrote:
>BTW: I just found this
>
>http://www.synthetic-ap.com/products/tpm/index.html
>
>If you have a mac, it will generate the patterns for you (single still 
>images)

Several companies made/make such devices.  I remember the NwTek Calibar
as one of the first.  Here are some:

http://www.itworks.com/products/portapattern-basic.htm

I seem to remember the Calibar was something on the order of a PIC
processor generating a series of video and audio signals.  

- Joh