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Note that reading the optical powers on the KCU is slow (16 seconds?).  Larry has a plan to improve that speed.  It's faster on the FEB.

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ATM Opal Issues

Who manages the server for the feedback epics variable? It's a notepad-pv server that is managed by Silke/POCs.

Why does det.raw.image not work when we enable fex?  Need to set fex→prescale = 1 to get image on every shot, 0 to disable images.  det.raw.image() should still work, but doesn't.  Need to debug.  det.ttfex.image() might be an ROI for the background events (no beam).  det.ttfex.proj_ref() is a projection of that ROI.  det.ttfex.proj_sig() for every event beam. Not sure what det.ttfex.raw() is.

ATM-FEX BatcherIterator Errors

For example:

Thread 36 "drp" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ff874ff9700 (LWP 25094)]
0x000055555559ab4a in Drp::EventInfo::eventCode (ec=<optimized out>, this=<optimized out>) at /cds/home/opr/rixopr/git/lcls2_013023/psdaq/drp/OpalTTFex.hh:27
27	  bool eventCode(unsigned ec) const { return _seqInfo[ec>>4] & (1<<(ec&0xf)); }
(gdb) 

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