Yeah saw that Ernie and Peter. I have noted that connect and not connected does make a difference to the PEC.
It could be wind Peter, but I have another curve that shows it one side and then the next cycle the other side.
Seeing was ok I think, not much movement from sub to sub and doing 0.5 sec subs too. I did 16 minutes of data collection, which is just over the recommended time frame to get 4-5 cycles.
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