Hello Maurik,
Pedestals were not subtracted during the readout. Pedestals
must be subtracted in offline analysis. Number of samples
that must be subtracted is 35, 5 readouts before the threshold
cross sing and 30 after.
As for definitions, I hope Sergei can explain.
Regards, Stepan
On 6/16/12 12:39 PM, Maurik Holtrop wrote:
> Dear folks,
>
> I have some very basic questions that I hope someone can answer for me.
>
> In the FADC250, are the pedestals subtracted during the readout, or do we need to subtract the pedestals during offline analysis?
> If the pedestals need to be subtracted offline, it seems to me that we would need to know the number of samples that was used for the integration of the pulse. Since each sample will have a pedestal.
>
> About the data in the "57603" bank. We read out, "slot", "trigger", "time" , Nc*{"chan", Np*{"pulse time","pulse integral"}}.
> Could someone tell me what are the proper definitions of the "trigger" number, the "time" number, and the "pulse time" number? I am afraid that I find myself a little confused about the details and don't want to go with my, probably incorrect, assumptions.
>
> Thanks!
>
> Best,
> Maurik
>
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