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Preamp & Interposer
Hi Yves,
I verified that the interposer had some bad solder joints and these have
been fixed. The one you have should be good.
I checked the amplifier and indeed channel 16 was not working. Further
tests revealed that the ASIC A input (for negative going signals or
anodes) has been damaged. The B input (for positive going signals or
cathodes) works fine.
Because I don't have additional preamp cards, I suggest that Gerard send
you his preamp and I will send him yours, which he can use for his
tests. I will ask Elke for additional funds to produce a few more preamp
cards (we have a few ASICs left).
Gerard, let us know if if this works for you.
Regards,
Fernando
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