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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | XSPRESS3 / InternalTrigger / AcquireTime |
| From: | John Dobbins via Tech-talk <tech-talk at aps.anl.gov> |
| To: | EPICS Tech Talk <tech-talk at aps.anl.gov> |
| Date: | Wed, 26 Aug 2020 13:59:47 +0000 |
|
All,
FYI.
I noticed that on the xspress3 with internal trigger selected the AcquireTime rolls over for times greater than ~ 53 seconds.
The ADC sample time is 12.5 nS. It appears the AcquireTime is converted to a 32-bit integer of ADC samples. 12.5nS * 2^32 = 53.7 seconds.
Setting an AcquireTime of 60 seconds generates an exposure of ~ 7 seconds.
Apologies if this is reported elsewhere and I missed it.
John Dobbins
Research Support Specialist
Cornell High Energy Synchrotron Source
Cornell University
Maybe it's all part of a great big ineffable plan. - Neil Gaiman, _Good Omens_ |