For anyone who has one of these scopes - have you tried running the probe comp app? When I run mine on CH1, I can't get it to work - it says either the signal was not detected, or the amplitude was not high enough.
When I run it on CH2, 3 or 4, I don't get any errors, but no matter how I turn the three adjustments on the probe, the signal never looks close to square - it's very rounded. I feel like I'm missing some important step here. (Yes, I did connect the probe to the ground pin and the P0 pin of the pattern gen)
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I did a factory reset, and now CH1 is not giving me errors. However, I'm still not able to get a square shape with any of the probes that came with the unit.