Thank you for the reply.
I do know it's AeT, I am trying to confirm what I believe is my AeT so I can see how it correlates to AnT (i.e. too wide a gap between the too can mean the AeT is underdeveloped - this can drive training methods).
I only recently discovered that Runalyze does this kind of analysis, previously I was recording on HRVLogger and then exporting the csv files for review later but that method has many limitations. I only discovered Runalyze's ability on a throwaway comment in the Uphill Athlete forum, so I quickly created an account and uploaded my recent activities using the H9. Previously I only wore the H9 on cycling activities as chest straps can be uncomfortable, I was using a Scosche Rhythm+ for my running but while it says it can capture HRV/RR data, the results are not usable in my experience. So I specifically did a few runs with the H9 to see what those results look like.
I have done one Ramp test on an indoor treadmill and that was the best so far with AeT estimated at 137. Everything else has just been outdoor runs, some of which have been unusable as HR varied up and down too much.
Artifacts were lower than 2.2% on the one ramp test. Unfortunately I am not familiar with some of the other settings you suggest, is there a FAQ on Runalyze that explains how to set these for different results?