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[Xu Sun <sunxuhit AT gmail.com>]

Hi Mike,

To follow up Zhenyu's email, please find a summary slide for the cable check in the attachment.

Hope this helps.

Best,

Xu

On Tue, Sep 1, 2020 at 10:26 AM Ye, Zhenyu <yezhenyu AT uic.edu> wrote:

Hi Mike,

I just dropped off two cables, FST-TEST-07 and FST-TEST-XX, to you (Building 510 address) at FedEx. They are expected to be delivered this Thursday (tracking number 396389239275).

We had some issues with these two cables:
1. FST-TEST-07: a chip (if we count chip 1-8, I think it was chip #7) is missing from the readout. This problem is reproducible
2. FST-TEST-XX: when I first used it, a chip (chip #6) was missing from the readout. Next time (a couple of weeks later) when I used it, chip 6 is in the readout but the pedestals of the chip showed abnormal behavior.
Xu will send some plots showing the problems later, which should confirm which chip it was.

I think we need to find out the cause of these problems and also implement a QC procedure for the inner signal cable assembly for production.

Best,
Zhenyu

https://urldefense.com/v3/__https://www.fedex.com/apps/fedextrack/?action="track&tracknumbers=396389239275&language=en&opco=FDEG&clientype=ivother__;!!P4SdNyxKAPE!W_r3sToFmcMzO4e2ayNJ89R8qVYTJDGfCWY9pG5uZ--jxVTWxBfDgIFqXN1tvRutyusoInI$
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Attachment: FstCableCheck.pdf
Description: Adobe PDF document