[Gb-ccb] CCB interface questions (fwd)

[Brian Mason]

On Thu, 11 Mar 2004, Martin Shepherd wrote:

> 
> On Thu, 11 Mar 2004, Brian Mason wrote:
> >...
> > So we will have output like
> >
> > J1(00) J1(01) J1(10) J1(11) J2(00) ... J16(11)
> >
> > *always*... with some of the phase bins empty when less than 2 switches
> > are active, and all the last J13...J16 bins (16 of them) empty for 3mm.
> 
> Agreed.

great

> 
> > You may find it interesting to review
> > http://wiki.gb.nrao.edu/bin/view/Projects/KaSoftware
> 
> Thanks. I don't think that I have written down how I plan to signal
> integration overflows. Rather than have a separate array of overflow
> flags, I decided to denote an overflow of a particular integration by
> setting the integrated value to 2^32-1, which is the maximum value
> that can be held by an unsigned 32-bit integer. In other words,
> individual integrations saturate at their maximum values after an
> overflow, regardless of whether the overflow was an ADC overflow or an
> adder overflow.

I see. So is it correct then that one overflowed ADC sample would set the
entire integration to 2^32-1?

 Brian

> 
> Martin
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> 

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