[Eg6_analysis] [meeting tomorrow

[Dupré Raphaël]

Hello Stephen,

I would rule out this possibility, because we noticed this problem
when we connected the detector in the first place. After which we
cross checked the connections 4 or 5 times. However, what I would not
exclude is that the first mispluged connection might have damage the
preamps or the electronic by sending the +- 5V into wrong channels.

Best,

On Thu, Oct 3, 2013 at 6:11 PM, Stephen Bueltmann <sbueltma at odu.edu> wrote:
> Hello All,
>
> Just an observation from today's meeting: on the plot that Nathan showed
> last, the "bad" pads as a function of position, I noticed a few of the
> groups to be 7x2, instead of the expected 8x2 for the case of an affected
> pre-amp/driver board.
>
> It may be conceivable, that the connector on the RTPC side was shifted by
> one position, effectively grounding a couple of pads, but not providing the
> desired ground connection between pre-amp board and pad readout plane.
> This would lead to two pads not being read out, the overall ground
> connection not as desired (possible ground loop via the cable, but not at
> the pad plane) and hence somewhat floating, and a shift in pad position as
> read out (wrongly assigned channel number).
>
> Maybe something to think about and
> Cheers,
> Stephen
>
> ---------------------------------------------------------------------
> Stephen Bueltmann
> Old Dominion University
>
> At ODU:   Physics Department
>           4600 Elkhorn Avenue
>           Norfolk, VA 23529, USA
>           Telephone (757) 683-6401
>           Facsimile (757) 683-3038
>           sbueltma at odu.edu
> ----------------------------------------------------------------------
>
>
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-- 
Raphaël Dupré