On January 10, 2006 03:37 pm, Jinx wrote:
> > > http://msl.irl.cri.nz/services/time/
> >
> > With PAL B as you (and we) have you have to account for the phase
> >
> > Peter
>
> Thanks for that insight Peter. I've got a query into MSL for some
> further information and practical examples
>
> I think the mains cycle thing is a no-goer now after learning that
> they "try" to keep within +/- 250 cycles per day. To answer Jose -
>
> > If you are going to get this up and running what's stopping you
> > from averaging out 10 days?
> > This way, you measure about 43,200,000 cycles and divide by 10 to
> > give you 4,320,000. +/- a bit
>
> - I worry about what that "bit" could be. To find out what that
> "bit" is, you'd need to compare it to a know standard. So why
> not just cut out the middle man

Here's something else to ponder in terms of colourburst....
Studio cameras are indeed accurate for the colour burst, if they get the 
colourburst off of some atomic clock, but what would you make of 
handycams and other portable cameras? They are portable, and therefore 
not as accurate as you would like.

Now imagine you are watching the news and they show an on-the-spot 
segment recorded from a handy-cam type camera.  I would think that you 
are getting colourburst according to the portable camera and not 
according to studio-quality colourburst.
I think the colourburst would be accurate for studio stuff (generated on 
sight) or even film type shows and movies, but now you get a lot of 
media recorded digitally, VCR tapes, etc, and pumped out via plain 
VCRs, DVD machines, etc, ...all of which produce their own colourburst.
We may possibly be seeing the sunset on colourburst as an accurate 
reference sent out by the TV services.

...just food for thought.
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