Proton Calorimetry/Meetings/2021/01/06: Difference between revisions

Revision as of 17:25, 6 January 2021

Raffaella Radogna, Saad Shaikh, Fern Pannell

Tested daisy-chaining 2nd DDC232 board prototype, discussed results in this presentation.
- Daisy-chain works with 2 boards but not 3 or 4. Observe strange correlation/mirroring of readings across 2nd and 3rd boards in the chain. Unclear why this occurs but determined that this is a circuit board issue rather than FPGA/PC issue.
- Will test daisy-chain with slower DCLK and in test mode to see if situation improves. Will also saturate photodiodes one-by-one to better understand which channels are "linked".
- Will likely need to contact Texas Instruments to ask why this might occur before discussing with Marko.
Debugged USB interface – now correctly sends data.
- Need to optimise speed further: FPGA write timing and C++ read timing. Latter will be more important.
Laptop should arrive at UCL this week! :)

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 === [[ELogs/SaadShaikh|Saad Shaikh]] ===
-*
+*Tested daisy-chaining 2nd DDC232 board prototype, discussed results in [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2021/SS210106_DDC232V2.pptx this presentation].
+**Daisy-chain works with 2 boards but not 3 or 4. Observe strange correlation/mirroring of readings across 2nd and 3rd boards in the chain. Unclear why this occurs but determined that this is a circuit board issue rather than FPGA/PC issue.
+**Will test daisy-chain with slower DCLK and in test mode to see if situation improves. Will also saturate photodiodes one-by-one to better understand which channels are "linked".
+**Will likely need to contact Texas Instruments to ask why this might occur before discussing with Marko.
+*Debugged USB interface – now correctly sends data.
+**Need to optimise speed further: FPGA write timing and C++ read timing. Latter will be more important.
+*Laptop should arrive at UCL this week! :)
 === [[ELogs/FernPannell|Fern Pannell]] ===