[d2n-analysis-talk] d2n BB replay (BBDecData problem)

[Diana Parno]

On Wed, 10 Mar 2010, Brad Sawatzky wrote:

> Sorry, I should be been clearer.  You will see one (and only one, I
> hope) empty set of VDC histos.  I went with the minimally invasive
> approach when I modified THaDecData.

OK, I see. I do only see one set. All the histograms are empty except for 
Lenroc12 and Lenroc16, which have 3908 entries each in that run; nearly 
all the entries are 0.

Thanks,
Diana

>
>> p.s. On both analyzer builds, I've just noticed I get a slew of
>> error messages on Event 1677 (error messages follow). Should we be
>> concerned about these?
> [ . . . ]
>> 1677:  Warning: F1 TDC 4d80a454  Slot (Ch) = 9(0)  Hit-FIFO overflow
>> 1677:  Warning: F1 TDC 4d80b019  Slot (Ch) = 9(0)  Hit-FIFO overflow
>> 1677:  Warning: F1 TDC 4d80b662  Slot (Ch) = 9(0)  Hit-FIFO overflow
>
> That's right, we did have some F1s in the system (roc5) -- I had
> forgotten about that.  The FIFO overflow errors typically meant that the
> F1s had gotten in bad state.  There are halogs about this condition.
> Bottom line is that the data for modules in those slots is probably
> trashed/suspect for that run.
>
> Looking at the db_DBB.dat file, I didn't see any of the 'BBDecData'
> keywords that use BBDecData's special ref-time subtraction stuff.  It
> looks like the ref channels are just picked out individually and
> (presumably) subtracted off the signal channels in the macros.  So,
> the THaDecData class should function identically for our case.  Someone
> tell me if I'm wrong though.  (It looks like we had a second copy of the
> triggers plugged into the f1s -- not sure if we look at that in any of
> our scripts.)
>
> -- Brad
>
> -- 
> Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
>  Ph: 757-269-5947 -<>- Pager: 757-584-5947 -<>- Fax: 757-269-5235
> The most exciting phrase to hear in science, the one that heralds new
>  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov
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