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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

This can happen if the pvput to the feedback EPICS variable fails (e.g. if no write permission).  The exception that is thrown by pvput is trapped by the batcheriterator.

Piranha4

Be sure to scan the Opal section for experiences that may be relevant to the Piranha, e.g. FEB LEDs, fiber powers, etc.

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