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When this happens ACR should also be notified so they can adjust the phase on their end.  Tim

Tim Maxwell wrote about this issue on Dec. 11, 2022:

"I also see that the operating phase is indeed getting close to 0. I suspect the wording of the error message itself just had it the wrong way around. Seems to be the phase shifted after changing to low charge. We can also walk back the offset so that it no longer throws the error. (The physical phase is still actually +90 currently, so this is okay.)

You could make it only a warning if the phase is approaching 0 or 180. In this case, the risk is the time axis may be reversed. At some point it could be noted to ACR to please adjust the phase offset for the cavity. 

In the case of lasing off references that may mean contaminating reconstructions if it's ambiguous though. Not noticing the warning, potentially getting it wrong, then matching all later events to a backwards image. 

(Or the risk that the cavity would become unstable. But ACR would certainly notice this and fix it.)

Thinking of how we can just do this better on our side as well to not be an issue."

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